platform/kernel/linux-rpi.git
14 months agopowerpc: replace #include <asm/export.h> with #include <linux/export.h>
Masahiro Yamada [Sun, 6 Aug 2023 15:09:53 +0000 (00:09 +0900)]
powerpc: replace #include <asm/export.h> with #include <linux/export.h>

Commit ddb5cdbafaaa ("kbuild: generate KSYMTAB entries by modpost")
deprecated <asm/export.h>, which is now a wrapper of <linux/export.h>.

Replace #include <asm/export.h> with #include <linux/export.h>.

After all the <asm/export.h> lines are converted, <asm/export.h> and
<asm-generic/export.h> will be removed.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
[mpe: Fixup selftests that stub asm/export.h]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230806150954.394189-2-masahiroy@kernel.org
14 months agopowerpc: remove unneeded #include <asm/export.h>
Masahiro Yamada [Sun, 6 Aug 2023 15:09:52 +0000 (00:09 +0900)]
powerpc: remove unneeded #include <asm/export.h>

There is no EXPORT_SYMBOL line there, hence #include <asm/export.h>
is unneeded.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230806150954.394189-1-masahiroy@kernel.org
14 months agopowerpc/inst: add PPC_TLBILX_LPID
Nick Desaulniers [Thu, 3 Aug 2023 18:33:52 +0000 (11:33 -0700)]
powerpc/inst: add PPC_TLBILX_LPID

Clang didn't recognize the instruction tlbilxlpid. This was fixed in
clang-18 [0] then backported to clang-17 [1].  To support clang-16 and
older, rather than using that instruction bare in inline asm, add it to
ppc-opcode.h and use that macro as is done elsewhere for other
instructions.

Link: https://github.com/ClangBuiltLinux/linux/issues/1891
Link: https://github.com/llvm/llvm-project/issues/64080
Link: https://github.com/llvm/llvm-project/commit/53648ac1d0c953ae6d008864dd2eddb437a92468
Link: https://github.com/llvm/llvm-project-release-prs/commit/0af7e5e54a8c7ac665773ac1ada328713e8338f5
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/llvm/202307211945.TSPcyOhh-lkp@intel.com/
Suggested-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230803-ppc_tlbilxlpid-v3-1-ca84739bfd73@google.com
14 months agocxl: Use pci_find_vsec_capability() to simplify the code
Xiongfeng Wang [Fri, 4 Aug 2023 07:56:30 +0000 (15:56 +0800)]
cxl: Use pci_find_vsec_capability() to simplify the code

PCI core add pci_find_vsec_capability() to query VSEC. We can use that
core API to simplify the code.

The only logical change is that pci_find_vsec_capability check the
Vendor ID before finding the VSEC.

PCI spec rev 5.0 says in 7.9.5.2 Vendor-Specific Header:
  VSEC ID - This field is a vendor-defined ID number that indicates the
  nature and format of the VSEC structure
  Software must qualify the Vendor ID before interpreting this field.

Signed-off-by: Xiongfeng Wang <wangxiongfeng2@huawei.com>
Reviewed-by: Andrew Donnellan <ajd@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230804075630.186054-1-wangxiongfeng2@huawei.com
14 months agopowerpc/reg: Remove #ifdef around mtspr macro
Christophe Leroy [Wed, 21 Jun 2023 10:40:50 +0000 (12:40 +0200)]
powerpc/reg: Remove #ifdef around mtspr macro

That ifdef was introduced by commit 1458dd951f7c ("powerpc/8xx:
Handle CPU6 ERRATA directly in mtspr() macro") and left over by
commit 2a45addd21de ("powerpc/8xx: Remove CPU6 ERRATA Workaround")

Remove it.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/cf652e47ea9e453e89813611b6f76d0939a12063.1687344017.git.christophe.leroy@csgroup.eu
14 months agopowerpc/step: Mark __copy_mem_out() and __emulate_dcbz() __always_inline
Christophe Leroy [Wed, 21 Jun 2023 10:38:10 +0000 (12:38 +0200)]
powerpc/step: Mark __copy_mem_out() and __emulate_dcbz() __always_inline

objtool reports two folliwng warnings:
  arch/powerpc/lib/sstep.o: warning: objtool: copy_mem_out+0x3c
    (.text+0x30c): call to __copy_mem_out() with UACCESS enabled
  arch/powerpc/lib/sstep.o: warning: objtool: emulate_dcbz+0x70
    (.text+0x4dc): call to __emulate_dcbz() with UACCESS enabled

Mark __copy_mem_out() and __emulate_dcbz() __always_inline

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/f1d4a15da70190f8c2fcddb377bbc1e09827242c.1687343857.git.christophe.leroy@csgroup.eu
14 months agopowerpc/cpm2: Remove cpm2_map() and cpm2_unmap()
Christophe Leroy [Tue, 8 Aug 2023 06:04:43 +0000 (08:04 +0200)]
powerpc/cpm2: Remove cpm2_map() and cpm2_unmap()

Since commit 449012daa92a ("[POWERPC] cpm2: Infrastructure code
cleanup.") cpm2_map() is just returning cpm2_immr pointer and
cpm2_unmap() does nothing.

We already have parts of code that use cpm2_immr directly so get rid
of cpm2_map() and cpm2_unmap() by using cpm2_immr directly. And avoid
going through local pointers that hide the pointed structure.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/9fe6ff7284e9f968b12abe7de7c08d7ea40e29d6.1691474658.git.christophe.leroy@csgroup.eu
14 months agopowerpc/8xx: Remove immr_map() and immr_unmap()
Christophe Leroy [Tue, 8 Aug 2023 06:04:42 +0000 (08:04 +0200)]
powerpc/8xx: Remove immr_map() and immr_unmap()

Since commit fb533d0c5a97 ("[POWERPC] 8xx: Infrastructure code cleanup.")
immr_map() is just returning mpc8xxx_immr pointer and immr_unmap()
do nothing.

We already have parts of code that use mpc8xxx_immr directly so get rid
of immr_map() and immr_unmap() by using mpc8xxx_immr directly. And avoid
going through local pointers that hide the pointed structure.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/633ed46f6015ff44d5599258647ea517f75d6a1d.1691474658.git.christophe.leroy@csgroup.eu
14 months agopowerpc: Remove CONFIG_PCI_8260
Christophe Leroy [Tue, 8 Aug 2023 06:04:41 +0000 (08:04 +0200)]
powerpc: Remove CONFIG_PCI_8260

CONFIG_PCI_8260 is not used anymore, remove it.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/19a4c07466ce8b80f287a06eadcc80c4ab1d2c9e.1691474658.git.christophe.leroy@csgroup.eu
14 months agopowerpc/include: Remove mpc8260.h and m82xx_pci.h
Christophe Leroy [Tue, 8 Aug 2023 06:04:40 +0000 (08:04 +0200)]
powerpc/include: Remove mpc8260.h and m82xx_pci.h

SIU_INT_IRQ1 is not used anywhere and __IO_BASE is defined in
asm/io.h

Remove m82xx_pci.h

Then the only thing remaining in mpc8260.h is MPC82XX_BCR_PLDP

Move MPC82XX_BCR_PLDP into asm/cpm2.h then remove mpc8260.h

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/afe23bf3624c389ff17e9789884c78c124b7b202.1691474658.git.christophe.leroy@csgroup.eu
14 months agopowerpc/include: Declare mpc8xx_immr in 8xx_immap.h
Christophe Leroy [Tue, 8 Aug 2023 06:04:39 +0000 (08:04 +0200)]
powerpc/include: Declare mpc8xx_immr in 8xx_immap.h

Do the same as for cmp2_immr : declare it at the same place
as its type immap_t, that is in 8xx_immap.h instead of fs_pd.h

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/62d490b65899c2f2667ca7045c5f0fad9cbda458.1691474658.git.christophe.leroy@csgroup.eu
14 months agopowerpc/include: Remove unneeded #include <asm/fs_pd.h>
Christophe Leroy [Tue, 8 Aug 2023 06:04:38 +0000 (08:04 +0200)]
powerpc/include: Remove unneeded #include <asm/fs_pd.h>

tqm8xx_setup.c and fs_enet.h don't use any items provided by fs_pd.h

Remove unneeded #include <asm/fs_pd.h>

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/b056c4e986a4a7707fc1994304c34f7bd15d6871.1691474658.git.christophe.leroy@csgroup.eu
14 months agoocxl: Use pci_dev_id() to simplify the code
Zheng Zengkai [Fri, 11 Aug 2023 10:20:39 +0000 (18:20 +0800)]
ocxl: Use pci_dev_id() to simplify the code

PCI core API pci_dev_id() can be used to get the BDF number for a pci
device. We don't need to compose it mannually. Use pci_dev_id() to
simplify the code a little bit.

Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>
Acked-by: Andrew Donnellan <ajd@linux.ibm.com>
Acked-by: Frederic Barrat <fbarrat@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230811102039.17257-1-zhengzengkai@huawei.com
14 months agomacintosh/ams: mark ams_init() static
Arnd Bergmann [Thu, 10 Aug 2023 14:19:24 +0000 (16:19 +0200)]
macintosh/ams: mark ams_init() static

This is the module init function, which by definition is used only
locally, so mark it static to avoid a warning:

drivers/macintosh/ams/ams-core.c:179:12: error: no previous prototype for 'ams_init' [-Werror=missing-prototypes]

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230810141947.1236730-7-arnd@kernel.org
14 months agopowerpc/pseries: PLPKS: undo kernel-doc comment notation
Randy Dunlap [Thu, 10 Aug 2023 00:07:40 +0000 (17:07 -0700)]
powerpc/pseries: PLPKS: undo kernel-doc comment notation

Don't use kernel-doc "/**" comment format for non-kernel-doc comments.
This prevents a kernel-doc warning:

  arch/powerpc/platforms/pseries/plpks.c:186: warning: This comment starts with '/**', but isn't a kernel-doc comment. Refer Documentation/doc-guide/kernel-doc.rst
  * Label is combination of label attributes + name.

Fixes: 2454a7af0f2a ("powerpc/pseries: define driver for Platform KeyStore")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Reported-by: kernel test robot <lkp@intel.com>
Link: lore.kernel.org/r/202308040430.GxmPAnwZ-lkp@intel.com
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230810000740.23756-1-rdunlap@infradead.org
14 months agopowerpc/radix: Move some functions into #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
Christophe Leroy [Wed, 9 Aug 2023 08:01:43 +0000 (10:01 +0200)]
powerpc/radix: Move some functions into #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE

With skiboot_defconfig, Clang reports:

  CC      arch/powerpc/mm/book3s64/radix_tlb.o
arch/powerpc/mm/book3s64/radix_tlb.c:419:20: error: unused function '_tlbie_pid_lpid' [-Werror,-Wunused-function]
static inline void _tlbie_pid_lpid(unsigned long pid, unsigned long lpid,
                   ^
arch/powerpc/mm/book3s64/radix_tlb.c:663:20: error: unused function '_tlbie_va_range_lpid' [-Werror,-Wunused-function]
static inline void _tlbie_va_range_lpid(unsigned long start, unsigned long end,
                   ^

This is because those functions are only called from functions
enclosed in a #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE

Move below functions inside that #ifdef
* __tlbie_pid_lpid(unsigned long pid,
* __tlbie_va_lpid(unsigned long va, unsigned long pid,
* fixup_tlbie_pid_lpid(unsigned long pid, unsigned long lpid)
* _tlbie_pid_lpid(unsigned long pid, unsigned long lpid,
* fixup_tlbie_va_range_lpid(unsigned long va,
* __tlbie_va_range_lpid(unsigned long start, unsigned long end,
* _tlbie_va_range_lpid(unsigned long start, unsigned long end,

Fixes: f0c6fbbb9050 ("KVM: PPC: Book3S HV: Add support for H_RPT_INVALIDATE")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202307260802.Mjr99P5O-lkp@intel.com/
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/3d72efd39f986ee939d068af69fdce28bd600766.1691568093.git.christophe.leroy@csgroup.eu
14 months agopowerpc: xmon: remove unused variables
Arnd Bergmann [Wed, 9 Aug 2023 13:10:09 +0000 (15:10 +0200)]
powerpc: xmon: remove unused variables

Randconfig testing with W=1 showed up these warnings that I'd like to enable
by default:

arch/powerpc/xmon/xmon.c: In function 'dump_tlb_book3e':
arch/powerpc/xmon/xmon.c:3833:42: error: variable 'lrat' set but not used [-Werror=unused-but-set-variable]
 3833 |  int i, tlb, ntlbs, pidsz, lpidsz, rasz, lrat = 0;
      |                                          ^~~~
arch/powerpc/xmon/xmon.c:3831:23: error: variable 'lpidmask' set but not used [-Werror=unused-but-set-variable]
 3831 |  u32 mmucfg, pidmask, lpidmask;
      |                       ^~~~~~~~
arch/powerpc/xmon/xmon.c:3831:14: error: variable 'pidmask' set but not used [-Werror=unused-but-set-variable]
 3831 |  u32 mmucfg, pidmask, lpidmask;
      |              ^~~~~~~

Just remove these as they have been unused since the code was added in 2010.

Fixes: 03247157f7391 ("powerpc/book3e: Add TLB dump in xmon for Book3E")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230809131024.2039647-2-arnd@kernel.org
14 months agopowerpc: mark more local variables as volatile
Arnd Bergmann [Wed, 9 Aug 2023 13:10:08 +0000 (15:10 +0200)]
powerpc: mark more local variables as volatile

A while ago I created a2305e3de8193 ("powerpc: mark local variables
around longjmp as volatile") in order to allow building powerpc with
-Wextra enabled on gcc-11.

I tried this again with gcc-13 and found two more of the same issues,
presumably based on slightly different optimization paths being taken
here:

arch/powerpc/xmon/xmon.c:3306:27: error: variable 'mm' might be clobbered by 'longjmp' or 'vfork' [-Werror=clobbered]
arch/powerpc/kexec/crash.c:353:22: error: variable 'i' might be clobbered by 'longjmp' or 'vfork' [-Werror=clobbered]

I checked a bunch of randconfigs and found only these two, so just
address them the same way as the others.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230809131024.2039647-1-arnd@kernel.org
14 months agopowerpc/pmac32: enable serial options by default in defconfig
Yuan Tan [Wed, 2 Aug 2023 13:41:30 +0000 (21:41 +0800)]
powerpc/pmac32: enable serial options by default in defconfig

Serial is a critical feature for logging and debuging, and the other
architectures enable serial by default.

Let's enable CONFIG_SERIAL_PMACZILOG and CONFIG_SERIAL_PMACZILOG_CONSOLE
by default.

Signed-off-by: Yuan Tan <tanyuan@tinylab.org>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/bb7b5f9958b3e3a20f6573ff7ce7c5dc566e7e32.1690982937.git.tanyuan@tinylab.org
14 months agoMerge branch 'topic/cpu-smt' into next
Michael Ellerman [Mon, 14 Aug 2023 11:46:03 +0000 (21:46 +1000)]
Merge branch 'topic/cpu-smt' into next

Merge SMT changes we are sharing with the tip tree.

15 months agopowerpc/pseries: Honour current SMT state when DLPAR onlining CPUs
Michael Ellerman [Wed, 5 Jul 2023 14:51:43 +0000 (16:51 +0200)]
powerpc/pseries: Honour current SMT state when DLPAR onlining CPUs

Integrate with the generic SMT support, so that when a CPU is DLPAR
onlined it is brought up with the correct SMT mode.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230705145143.40545-11-ldufour@linux.ibm.com
15 months agopowerpc: Add HOTPLUG_SMT support
Michael Ellerman [Wed, 5 Jul 2023 14:51:42 +0000 (16:51 +0200)]
powerpc: Add HOTPLUG_SMT support

Add support for HOTPLUG_SMT, which enables the generic sysfs SMT support
files in /sys/devices/system/cpu/smt, as well as the "nosmt" boot
parameter.

Implement the recently added hooks to allow partial SMT states, allow
any number of threads per core.

Tie the config symbol to HOTPLUG_CPU, which enables it on the major
platforms that support SMT. If there are other platforms that want the
SMT support that can be tweaked in future.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
[ldufour: remove topology_smt_supported]
[ldufour: remove topology_smt_threads_supported]
[ldufour: select CONFIG_SMT_NUM_THREADS_DYNAMIC]
[ldufour: update kernel-parameters.txt]
Signed-off-by: Laurent Dufour <ldufour@linux.ibm.com>
Link: https://msgid.link/20230705145143.40545-10-ldufour@linux.ibm.com
15 months agopowerpc/pseries: Initialise CPU hotplug callbacks earlier
Michael Ellerman [Wed, 5 Jul 2023 14:51:41 +0000 (16:51 +0200)]
powerpc/pseries: Initialise CPU hotplug callbacks earlier

As part of the generic HOTPLUG_SMT code, there is support for disabling
secondary SMT threads at boot time, by passing "nosmt" on the kernel
command line.

The way that is implemented is the secondary threads are brought partly
online, and then taken back offline again. That is done to support x86
CPUs needing certain initialisation done on all threads. However powerpc
has similar needs, see commit d70a54e2d085 ("powerpc/powernv: Ignore
smt-enabled on Power8 and later").

For that to work the powerpc CPU hotplug callbacks need to be registered
before secondary CPUs are brought online, otherwise __cpu_disable()
fails due to smp_ops->cpu_disable being NULL.

So split the basic initialisation into pseries_cpu_hotplug_init() which
can be called early from setup_arch(). The DLPAR related initialisation
can still be done later, because it needs to do allocations.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230705145143.40545-9-ldufour@linux.ibm.com
15 months agoMerge tag 'smp-core-for-ppc-23-07-28' of https://git.kernel.org/pub/scm/linux/kernel...
Michael Ellerman [Wed, 2 Aug 2023 12:39:48 +0000 (22:39 +1000)]
Merge tag 'smp-core-for-ppc-23-07-28' of https://git./linux/kernel/git/tip/tip into topic/cpu-smt

SMP core changes for powerpc

15 months agopowerpc/kexec: fix minor typo
Laurent Dufour [Tue, 25 Jul 2023 13:27:59 +0000 (15:27 +0200)]
powerpc/kexec: fix minor typo

Function name in the descriptor was not correct.

Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202307251721.bUGcsCeQ-lkp@intel.com/
Signed-off-by: Laurent Dufour <ldufour@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230725132759.53975-1-ldufour@linux.ibm.com
15 months agopowerpc/ep8248e: Mark driver as non removable
Uwe Kleine-König [Wed, 26 Jul 2023 08:14:42 +0000 (10:14 +0200)]
powerpc/ep8248e: Mark driver as non removable

Instead of resorting to BUG() ensure that the driver isn't unbound by
suppressing its bind and unbind sysfs attributes. As the driver is
built-in there is no way to remove a device once bound.

As a nice side effect this allows to drop the remove function.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230726081442.461026-1-u.kleine-koenig@pengutronix.de
15 months agopowerpc: address missing-prototypes warnings
Arnd Bergmann [Thu, 27 Jul 2023 12:26:50 +0000 (14:26 +0200)]
powerpc: address missing-prototypes warnings

There are a few warnings in powerpc64 defconfig builds after -Wmissing-prototypes
gets promoted from W=1 to the default warning set:

arch/powerpc/mm/book3s64/pgtable.c:422:6: error: no previous prototype for 'arch_report_meminfo' [-Werror=missing-prototypes]
arch/powerpc/platforms/cell/ras.c:275:5: error: no previous prototype for 'cbe_sysreset_hack' [-Werror=missing-prototypes]
arch/powerpc/platforms/cell/spu_manage.c:29:21: error: no previous prototype for 'spu_devnode' [-Werror=missing-prototypes]
arch/powerpc/platforms/pasemi/time.c:12:17: error: no previous prototype for 'pas_get_boot_time' [-Werror=missing-prototypes]
arch/powerpc/platforms/powermac/feature.c:1532:13: error: no previous prototype for 'g5_phy_disable_cpu1' [-Werror=missing-prototypes]
arch/powerpc/platforms/86xx/pic.c:28:13: error: no previous prototype for 'mpc86xx_init_irq' [-Werror=missing-prototypes]
drivers/pci/pci-sysfs.c:936:13: error: no previous prototype for 'pci_adjust_legacy_attr' [-Werror=missing-prototypes]

Address these by including the right header files or marking the
functions static. The audit.c one is a bit tricky since compat_audit.h
cannot include regular kernel headers tht have conflicting types on
32-bit powerpc.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
[mpe: Drop change to __vmemmap_free() which only exists in mm]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230727122720.2558065-1-arnd@kernel.org
15 months agoselftests/powerpc/ptrace: Declare test temporary variables as volatile
Benjamin Gray [Tue, 25 Jul 2023 00:58:41 +0000 (10:58 +1000)]
selftests/powerpc/ptrace: Declare test temporary variables as volatile

While the target is volatile, the temporary variables used to access the
target cast away the volatile. This is undefined behaviour, and a
compiler may optimise away/reorder these accesses, breaking the test.

This was observed with GCC 13.1.1, but it can be difficult to reproduce
because of the dependency on compiler behaviour.

Signed-off-by: Benjamin Gray <bgray@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230725005841.28854-5-bgray@linux.ibm.com
15 months agoselftests/powerpc/ptrace: Fix typo in pid_max search error
Benjamin Gray [Tue, 25 Jul 2023 00:58:40 +0000 (10:58 +1000)]
selftests/powerpc/ptrace: Fix typo in pid_max search error

pid_max_addr() searches for the 'pid_max' symbol in /proc/kallsyms, and
prints an error if it cannot find it. The error message has a typo,
calling it pix_max.

Signed-off-by: Benjamin Gray <bgray@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230725005841.28854-4-bgray@linux.ibm.com
15 months agoselftests/powerpc/ptrace: Explain why tests are skipped
Benjamin Gray [Tue, 25 Jul 2023 00:58:39 +0000 (10:58 +1000)]
selftests/powerpc/ptrace: Explain why tests are skipped

Many tests require specific hardware features/configurations that a
typical machine might not have. As a result, it's common to see a test
is skipped. But it is tedious to find out why a test is skipped
when all it gives is the file location of the skip macro.

Convert SKIP_IF() to SKIP_IF_MSG(), with appropriate descriptions of why
the test is being skipped. This gives a general idea of why a test is
skipped, which can be looked into further if it doesn't make sense.

Signed-off-by: Benjamin Gray <bgray@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230725005841.28854-3-bgray@linux.ibm.com
15 months agopowerpc: Explicitly include correct DT includes
Rob Herring [Mon, 24 Jul 2023 21:02:42 +0000 (15:02 -0600)]
powerpc: Explicitly include correct DT includes

The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.

Signed-off-by: Rob Herring <robh@kernel.org>
[mpe: Fixup maple/setup.c which needs platform_device]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230724210247.778034-1-robh@kernel.org
15 months agopowerpc/64s/radix: combine final TLB flush and lazy tlb mm shootdown IPIs
Nicholas Piggin [Wed, 24 May 2023 06:08:21 +0000 (16:08 +1000)]
powerpc/64s/radix: combine final TLB flush and lazy tlb mm shootdown IPIs

This performs lazy tlb mm shootdown when doing the exit TLB flush when
all mm users go away and user mappings are removed, which avoids having
to do the lazy tlb mm shootdown IPIs on the final mmput when all kernel
references disappear.

powerpc/64s uses a broadcast TLBIE for the exit TLB flush if remote CPUs
need to be invalidated (unless TLBIE is disabled), so this doesn't
necessarily save IPIs but it does avoid a broadcast TLBIE which is quite
expensive.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Squash in preempt_disable/enable() fix from Nick]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230524060821.148015-5-npiggin@gmail.com
15 months agopowerpc: Add mm_cpumask warning when context switching
Nicholas Piggin [Wed, 24 May 2023 06:08:20 +0000 (16:08 +1000)]
powerpc: Add mm_cpumask warning when context switching

When context switching away from an mm, add a CONFIG_DEBUG_VM warning
check to ensure this CPU is still set in the mask. This could catch
bugs where the mask is improperly trimmed while the CPU is still using
the mm.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230524060821.148015-4-npiggin@gmail.com
15 months agopowerpc/64s: Use dec_mm_active_cpus helper
Nicholas Piggin [Wed, 24 May 2023 06:08:19 +0000 (16:08 +1000)]
powerpc/64s: Use dec_mm_active_cpus helper

Avoid open-coded atomic_dec on mm->context.active_cpus and use the
function made for it. Add CONFIG_DEBUG_VM underflow checking on the
counter.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230524060821.148015-3-npiggin@gmail.com
15 months agopowerpc: Account mm_cpumask and active_cpus in init_mm
Nicholas Piggin [Wed, 24 May 2023 06:08:18 +0000 (16:08 +1000)]
powerpc: Account mm_cpumask and active_cpus in init_mm

init_mm mm_cpumask and context.active_cpus is not maintained at boot
and hotplug. This seems to be harmless because init_mm does not have a
userspace and so never gets user TLBs flushed, but it looks odd and it
prevents some sanity checks being added.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230524060821.148015-2-npiggin@gmail.com
15 months agopowerpc/64: Enable accelerated crypto algorithms in defconfig
Michael Ellerman [Mon, 17 Jul 2023 11:52:23 +0000 (21:52 +1000)]
powerpc/64: Enable accelerated crypto algorithms in defconfig

Enable all the acclerated crypto algorithms as modules in the 64-bit
defconfig, to get more test coverage.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/20230717115223.286158-1-mpe@ellerman.id.au
15 months agopowerpc/crypto: don't build aes-gcm-p10 by default
Omar Sandoval [Mon, 10 Jul 2023 16:46:47 +0000 (09:46 -0700)]
powerpc/crypto: don't build aes-gcm-p10 by default

None of the other accelerated crypto modules are built by default.

Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/40d9c7ebe82c9a9d4ace542ac433753d2f22c6a0.1689007370.git.osandov@osandov.com
15 months agopowerpc/crypto: fix missing skcipher dependency for aes-gcm-p10
Omar Sandoval [Mon, 10 Jul 2023 16:46:46 +0000 (09:46 -0700)]
powerpc/crypto: fix missing skcipher dependency for aes-gcm-p10

My stripped down configuration fails to build with:

  ERROR: modpost: "skcipher_walk_aead_encrypt" [arch/powerpc/crypto/aes-gcm-p10-crypto.ko] undefined!
  ERROR: modpost: "skcipher_walk_done" [arch/powerpc/crypto/aes-gcm-p10-crypto.ko] undefined!
  ERROR: modpost: "skcipher_walk_aead_decrypt" [arch/powerpc/crypto/aes-gcm-p10-crypto.ko] undefined!

Fix it by selecting CRYPTO_SKCIPHER.

Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/c55ad70799e027a3d2756b85ccadc0af52ae8915.1689007370.git.osandov@osandov.com
15 months agopowerpc/kuap: Use ASM feature fixups instead of static branches
Christophe Leroy [Tue, 11 Jul 2023 15:59:21 +0000 (17:59 +0200)]
powerpc/kuap: Use ASM feature fixups instead of static branches

To avoid a useless nop on top of every uaccess enable/disable and
make life easier for objtool, replace static branches by ASM feature
fixups that will nop KUAP enabling instructions out in the unlikely
case KUAP is disabled at boottime.

Leave it as is on book3s/64 for now, it will be handled later when
objtool is activated on PPC64.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/671948788024fd890ec4ed175bc332dab8664ea5.1689091022.git.christophe.leroy@csgroup.eu
15 months agopowerpc/kuap: KUAP enabling/disabling functions must be __always_inline
Christophe Leroy [Tue, 11 Jul 2023 15:59:20 +0000 (17:59 +0200)]
powerpc/kuap: KUAP enabling/disabling functions must be __always_inline

Objtool reports following warnings:

  arch/powerpc/kernel/signal_32.o: warning: objtool:
    __prevent_user_access.constprop.0+0x4 (.text+0x4):
    redundant UACCESS disable

  arch/powerpc/kernel/signal_32.o: warning: objtool: user_access_begin+0x2c
    (.text+0x4c): return with UACCESS enabled

  arch/powerpc/kernel/signal_32.o: warning: objtool: handle_rt_signal32+0x188
    (.text+0x360): call to __prevent_user_access.constprop.0() with UACCESS enabled

  arch/powerpc/kernel/signal_32.o: warning: objtool: handle_signal32+0x150
    (.text+0x4d4): call to __prevent_user_access.constprop.0() with UACCESS enabled

This is due to some KUAP enabling/disabling functions being outline
allthough they are marked inline. Use __always_inline instead.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/ca5e50ddbec3867db5146ebddbc9a1dc0e443bc8.1689091022.git.christophe.leroy@csgroup.eu
15 months agopowerpc/kuap: Simplify KUAP lock/unlock on BOOK3S/32
Christophe Leroy [Tue, 11 Jul 2023 15:59:19 +0000 (17:59 +0200)]
powerpc/kuap: Simplify KUAP lock/unlock on BOOK3S/32

On book3s/32 KUAP is performed at segment level. At the moment,
when enabling userspace access, only current segment is modified.
Then if a write is performed on another user segment, a fault is
taken and all other user segments get enabled for userspace
access. This then require special attention when disabling
userspace access.

Having a userspace write access crossing a segment boundary is
unlikely. Having a userspace write access crossing a segment boundary
back and forth is even more unlikely. So, instead of enabling
userspace access on all segments when a write fault occurs, just
change which segment has userspace access enabled in order to
eliminate the case when more than one segment has userspace access
enabled. That simplifies userspace access deactivation.

There is however a corner case which is even more unlikely but has
to be handled anyway: an unaligned access which is crossing a
segment boundary. That would definitely require at least having
userspace access enabled on the two segments. To avoid complicating
the likely case for a so unlikely happening, handle such situation
like an alignment exception and emulate the store.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/8de8580513c1a6e880bad1ba9a69d3efad3d4fa5.1689091022.git.christophe.leroy@csgroup.eu
15 months agopowerpc/kuap: Use MMU_FTR_KUAP on all and refactor disabling kuap
Christophe Leroy [Tue, 11 Jul 2023 15:59:18 +0000 (17:59 +0200)]
powerpc/kuap: Use MMU_FTR_KUAP on all and refactor disabling kuap

All but book3s/64 use a static branch key for disabling kuap.
book3s/64 uses an mmu feature.

Refactor all targets to use MMU_FTR_KUAP like book3s/64.

For PPC32 that implies updating mmu features fixups once KUAP
has been initialised.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/6b3d7c977bad73378ea368bc6818e9c94ea95ab0.1689091022.git.christophe.leroy@csgroup.eu
15 months agopowerpc/kuap: MMU_FTR_BOOK3S_KUAP becomes MMU_FTR_KUAP
Christophe Leroy [Tue, 11 Jul 2023 15:59:17 +0000 (17:59 +0200)]
powerpc/kuap: MMU_FTR_BOOK3S_KUAP becomes MMU_FTR_KUAP

In order to reuse MMU_FTR_BOOK3S_KUAP for other targets than BOOK3S,
rename it MMU_FTR_KUAP.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/c8b6f7b8cd0eeaace96879ed0e0a157faa619451.1689091022.git.christophe.leroy@csgroup.eu
15 months agopowerpc/features: Add capability to update mmu features later
Christophe Leroy [Tue, 11 Jul 2023 15:59:16 +0000 (17:59 +0200)]
powerpc/features: Add capability to update mmu features later

On powerpc32, features fixup is performed very early and that's too
early to read the cmdline and take into account 'nosmap' parameter.

On the other hand, no userspace access is performed that early and
KUAP feature fixup can be performed later.

Add a function to update mmu features. The function is passed a
mask with the features that can be updated.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/31b27ee2c9d338f4f82cd8cd69d6bff979495290.1689091022.git.christophe.leroy@csgroup.eu
15 months agopowerpc/kuap: Fold kuep_is_disabled() into its only user
Christophe Leroy [Tue, 11 Jul 2023 15:59:15 +0000 (17:59 +0200)]
powerpc/kuap: Fold kuep_is_disabled() into its only user

kuep_is_disabled() was introduced by commit 91bb30822a2e ("powerpc/32s:
Refactor update of user segment registers") but then all users but one
were removed by commit 526d4a4c77ae ("powerpc/32s: Do kuep_lock() and
kuep_unlock() in assembly").

Fold kuep_is_disabled() into init_new_context() which is its only user.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/b2247147c0a8c830ac82966451647850df4a64da.1689091022.git.christophe.leroy@csgroup.eu
15 months agopowerpc/kuap: Avoid useless jump_label on empty function
Christophe Leroy [Tue, 11 Jul 2023 15:59:14 +0000 (17:59 +0200)]
powerpc/kuap: Avoid useless jump_label on empty function

Disassembly of interrupt_enter_prepare() shows a pointless nop
before the mftb

  c000abf0 <interrupt_enter_prepare>:
  c000abf0:       81 23 00 84     lwz     r9,132(r3)
  c000abf4:       71 29 40 00     andi.   r9,r9,16384
  c000abf8:       41 82 00 28     beq-    c000ac20 <interrupt_enter_prepare+0x30>
  c000abfc: ===>  60 00 00 00     nop <====
  c000ac00:       7d 0c 42 e6     mftb    r8
  c000ac04:       80 e2 00 08     lwz     r7,8(r2)
  c000ac08:       81 22 00 28     lwz     r9,40(r2)
  c000ac0c:       91 02 00 24     stw     r8,36(r2)
  c000ac10:       7d 29 38 50     subf    r9,r9,r7
  c000ac14:       7d 29 42 14     add     r9,r9,r8
  c000ac18:       91 22 00 08     stw     r9,8(r2)
  c000ac1c:       4e 80 00 20     blr
  c000ac20:       60 00 00 00     nop
  c000ac24:       7d 5a c2 a6     mfmd_ap r10
  c000ac28:       3d 20 de 00     lis     r9,-8704
  c000ac2c:       91 43 00 b0     stw     r10,176(r3)
  c000ac30:       7d 3a c3 a6     mtspr   794,r9
  c000ac34:       4e 80 00 20     blr

That comes from the call to kuap_loc(), allthough __kuap_lock() is an
empty function on the 8xx.

To avoid that, only perform kuap_is_disabled() check when there is
something to do with __kuap_lock().

Do the same with __kuap_save_and_lock() and
__kuap_get_and_assert_locked().

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/a854d25bea375d4ba6ca9c2617f9edbba397100a.1689091022.git.christophe.leroy@csgroup.eu
15 months agopowerpc/kuap: Avoid unnecessary reads of MD_AP
Christophe Leroy [Tue, 11 Jul 2023 15:59:13 +0000 (17:59 +0200)]
powerpc/kuap: Avoid unnecessary reads of MD_AP

A disassembly of interrupt_exit_kernel_prepare() shows a useless read
of MD_AP register. This is shown by r9 being re-used immediately without
doing anything with the value read.

  c000e0e0:       60 00 00 00     nop
  c000e0e4: ===>  7d 3a c2 a6     mfmd_ap r9 <====
  c000e0e8:       7d 20 00 a6     mfmsr   r9
  c000e0ec:       7c 51 13 a6     mtspr   81,r2
  c000e0f0:       81 3f 00 84     lwz     r9,132(r31)
  c000e0f4:       71 29 80 00     andi.   r9,r9,32768

kuap_get_and_assert_locked() is paired with kuap_kernel_restore()
and are only used in interrupt_exit_kernel_prepare(). The value
returned by kuap_get_and_assert_locked() is only used by
kuap_kernel_restore().

On 8xx, kuap_kernel_restore() doesn't use the value read by
kuap_get_and_assert_locked() so modify kuap_get_and_assert_locked()
to not perform the read of MD_AP and return 0 instead.

The same applies on BOOKE.

Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://msgid.link/bcbc84c2dd90bb1021da792b1968cdc22112dad8.1689091022.git.christophe.leroy@csgroup.eu
15 months agocpu/SMT: Allow enabling partial SMT states via sysfs
Michael Ellerman [Wed, 5 Jul 2023 14:51:40 +0000 (16:51 +0200)]
cpu/SMT: Allow enabling partial SMT states via sysfs

Add support to the /sys/devices/system/cpu/smt/control interface for
enabling a specified number of SMT threads per core, including partial
SMT states where not all threads are brought online.

The current interface accepts "on" and "off", to enable either 1 or all
SMT threads per core.

This commit allows writing an integer, between 1 and the number of SMT
threads supported by the machine. Writing 1 is a synonym for "off", 2 or
more enables SMT with the specified number of threads.

When reading the file, if all threads are online "on" is returned, to
avoid changing behaviour for existing users. If some other number of
threads is online then the integer value is returned.

Architectures like x86 only supporting 1 thread or all threads, should not
define CONFIG_SMT_NUM_THREADS_DYNAMIC. Architecture supporting partial SMT
states, like PowerPC, should define it.

[ ldufour: Slightly reword the commit's description ]
[ ldufour: Remove switch() in __store_smt_control() ]
[ ldufour: Rix build issue in control_show() ]

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Laurent Dufour <ldufour@linux.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Zhang Rui <rui.zhang@intel.com>
Link: https://lore.kernel.org/r/20230705145143.40545-8-ldufour@linux.ibm.com
15 months agocpu/SMT: Create topology_smt_thread_allowed()
Michael Ellerman [Wed, 5 Jul 2023 14:51:39 +0000 (16:51 +0200)]
cpu/SMT: Create topology_smt_thread_allowed()

Some architectures allows partial SMT states, i.e. when not all SMT threads
are brought online.

To support that, add an architecture helper which checks whether a given
CPU is allowed to be brought online depending on how many SMT threads are
currently enabled. Since this is only applicable to architecture supporting
partial SMT, only these architectures should select the new configuration
variable CONFIG_SMT_NUM_THREADS_DYNAMIC. For the other architectures, not
supporting the partial SMT states, there is no need to define
topology_cpu_smt_allowed(), the generic code assumed that all the threads
are allowed or only the primary ones.

Call the helper from cpu_smt_enable(), and cpu_smt_allowed() when SMT is
enabled, to check if the particular thread should be onlined. Notably,
also call it from cpu_smt_disable() if CPU_SMT_ENABLED, to allow
offlining some threads to move from a higher to lower number of threads
online.

[ ldufour: Slightly reword the commit's description ]
[ ldufour: Introduce CONFIG_SMT_NUM_THREADS_DYNAMIC ]

Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Laurent Dufour <ldufour@linux.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Zhang Rui <rui.zhang@intel.com>
Link: https://lore.kernel.org/r/20230705145143.40545-7-ldufour@linux.ibm.com
15 months agocpu/SMT: Remove topology_smt_supported()
Laurent Dufour [Wed, 5 Jul 2023 14:51:38 +0000 (16:51 +0200)]
cpu/SMT: Remove topology_smt_supported()

Since the maximum number of threads is now passed to cpu_smt_set_num_threads(),
checking that value is enough to know whether SMT is supported.

Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Laurent Dufour <ldufour@linux.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Zhang Rui <rui.zhang@intel.com>
Link: https://lore.kernel.org/r/20230705145143.40545-6-ldufour@linux.ibm.com
15 months agocpu/SMT: Store the current/max number of threads
Michael Ellerman [Wed, 5 Jul 2023 14:51:37 +0000 (16:51 +0200)]
cpu/SMT: Store the current/max number of threads

Some architectures allow partial SMT states at boot time, ie. when not all
SMT threads are brought online.

To support that the SMT code needs to know the maximum number of SMT
threads, and also the currently configured number.

The architecture code knows the max number of threads, so have the
architecture code pass that value to cpu_smt_set_num_threads(). Note that
although topology_max_smt_threads() exists, it is not configured early
enough to be used here. As architecture, like PowerPC, allows the threads
number to be set through the kernel command line, also pass that value.

[ ldufour: Slightly reword the commit message ]
[ ldufour: Rename cpu_smt_check_topology and add a num_threads argument ]

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Laurent Dufour <ldufour@linux.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Zhang Rui <rui.zhang@intel.com>
Link: https://lore.kernel.org/r/20230705145143.40545-5-ldufour@linux.ibm.com
15 months agocpu/SMT: Move smt/control simple exit cases earlier
Michael Ellerman [Wed, 5 Jul 2023 14:51:36 +0000 (16:51 +0200)]
cpu/SMT: Move smt/control simple exit cases earlier

Move the simple exit cases, i.e. those which don't depend on the value
written, earlier in the function. That makes it clearer that regardless of
the input those states cannot be transitioned out of.

That does have a user-visible effect, in that the error returned will
now always be EPERM/ENODEV for those states, regardless of the value
written. Previously writing an invalid value would return EINVAL even
when in those states.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Zhang Rui <rui.zhang@intel.com>
Link: https://lore.kernel.org/r/20230705145143.40545-4-ldufour@linux.ibm.com
15 months agocpu/SMT: Move SMT prototypes into cpu_smt.h
Michael Ellerman [Wed, 5 Jul 2023 14:51:35 +0000 (16:51 +0200)]
cpu/SMT: Move SMT prototypes into cpu_smt.h

In order to export the cpuhp_smt_control enum as part of the interface
between generic and architecture code, the architecture code needs to
include asm/topology.h.

But that leads to circular header dependencies. So split the enum and
related declarations into a separate header.

[ ldufour: Reworded the commit's description ]

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Laurent Dufour <ldufour@linux.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Zhang Rui <rui.zhang@intel.com>
Link: https://lore.kernel.org/r/20230705145143.40545-3-ldufour@linux.ibm.com
15 months agocpu/hotplug: Remove dependancy against cpu_primary_thread_mask
Laurent Dufour [Wed, 5 Jul 2023 14:51:34 +0000 (16:51 +0200)]
cpu/hotplug: Remove dependancy against cpu_primary_thread_mask

The commit 18415f33e2ac ("cpu/hotplug: Allow "parallel" bringup up to
CPUHP_BP_KICK_AP_STATE") introduce a dependancy against a global variable
cpu_primary_thread_mask exported by the X86 code. This variable is only
used when CONFIG_HOTPLUG_PARALLEL is set.

Since cpuhp_get_primary_thread_mask() and cpuhp_smt_aware() are only used
when CONFIG_HOTPLUG_PARALLEL is set, don't define them when it is not set.

No functional change.

Signed-off-by: Laurent Dufour <ldufour@linux.ibm.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Tested-by: Zhang Rui <rui.zhang@intel.com>
Link: https://lore.kernel.org/r/20230705145143.40545-2-ldufour@linux.ibm.com
15 months agoLinux 6.5-rc3
Linus Torvalds [Sun, 23 Jul 2023 22:24:10 +0000 (15:24 -0700)]
Linux 6.5-rc3

15 months agoMerge tag 'trace-v6.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace...
Linus Torvalds [Sun, 23 Jul 2023 22:19:14 +0000 (15:19 -0700)]
Merge tag 'trace-v6.5-rc2' of git://git./linux/kernel/git/trace/linux-trace

Pull tracing fixes from Steven Rostedt:

 - Swapping the ring buffer for snapshotting (for things like irqsoff)
   can crash if the ring buffer is being resized. Disable swapping when
   this happens. The missed swap will be reported to the tracer

 - Report error if the histogram fails to be created due to an error in
   adding a histogram variable, in event_hist_trigger_parse()

 - Remove unused declaration of tracing_map_set_field_descr()

* tag 'trace-v6.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace:
  tracing/histograms: Return an error if we fail to add histogram to hist_vars list
  ring-buffer: Do not swap cpu_buffer during resize process
  tracing: Remove unused extern declaration tracing_map_set_field_descr()

15 months agoMerge tag 'kbuild-fixes-v6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/masahi...
Linus Torvalds [Sun, 23 Jul 2023 21:55:41 +0000 (14:55 -0700)]
Merge tag 'kbuild-fixes-v6.5' of git://git./linux/kernel/git/masahiroy/linux-kbuild

Pull Kbuild fixes from Masahiro Yamada:

 - Fix stale help text in gconfig

 - Support *.S files in compile_commands.json

 - Flatten KBUILD_CFLAGS

 - Fix external module builds with Rust so that temporary files are
   created in the modules directories instead of the kernel tree

* tag 'kbuild-fixes-v6.5' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild:
  kbuild: rust: avoid creating temporary files
  kbuild: flatten KBUILD_CFLAGS
  gen_compile_commands: add assembly files to compilation database
  kconfig: gconfig: correct program name in help text
  kconfig: gconfig: drop the Show Debug Info help text

15 months agokbuild: rust: avoid creating temporary files
Miguel Ojeda [Sun, 23 Jul 2023 14:21:28 +0000 (16:21 +0200)]
kbuild: rust: avoid creating temporary files

`rustc` outputs by default the temporary files (i.e. the ones saved
by `-Csave-temps`, such as `*.rcgu*` files) in the current working
directory when `-o` and `--out-dir` are not given (even if
`--emit=x=path` is given, i.e. it does not use those for temporaries).

Since out-of-tree modules are compiled from the `linux` tree,
`rustc` then tries to create them there, which may not be accessible.

Thus pass `--out-dir` explicitly, even if it is just for the temporary
files.

Similarly, do so for Rust host programs too.

Reported-by: Raphael Nestler <raphael.nestler@gmail.com>
Closes: https://github.com/Rust-for-Linux/linux/issues/1015
Reported-by: Andrea Righi <andrea.righi@canonical.com>
Tested-by: Raphael Nestler <raphael.nestler@gmail.com> # non-hostprogs
Tested-by: Andrea Righi <andrea.righi@canonical.com> # non-hostprogs
Fixes: 295d8398c67e ("kbuild: specify output names separately for each emission type from rustc")
Cc: stable@vger.kernel.org
Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
Tested-by: Martin Rodriguez Reboredo <yakoyoku@gmail.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
15 months agoMerge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Linus Torvalds [Sun, 23 Jul 2023 17:44:38 +0000 (10:44 -0700)]
Merge tag 'for-linus' of git://git./virt/kvm/kvm

Pull kvm fixes from Paolo Bonzini:
 "ARM:

   - Avoid pKVM finalization if KVM initialization fails

   - Add missing BTI instructions in the hypervisor, fixing an early
     boot failure on BTI systems

   - Handle MMU notifiers correctly for non hugepage-aligned memslots

   - Work around a bug in the architecture where hypervisor timer
     controls have UNKNOWN behavior under nested virt

   - Disable preemption in kvm_arch_hardware_enable(), fixing a kernel
     BUG in cpu hotplug resulting from per-CPU accessor sanity checking

   - Make WFI emulation on GICv4 systems robust w.r.t. preemption,
     consistently requesting a doorbell interrupt on vcpu_put()

   - Uphold RES0 sysreg behavior when emulating older PMU versions

   - Avoid macro expansion when initializing PMU register names,
     ensuring the tracepoints pretty-print the sysreg

  s390:

   - Two fixes for asynchronous destroy

  x86 fixes will come early next week"

* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm:
  KVM: s390: pv: fix index value of replaced ASCE
  KVM: s390: pv: simplify shutdown and fix race
  KVM: arm64: Fix the name of sys_reg_desc related to PMU
  KVM: arm64: Correctly handle RES0 bits PMEVTYPER<n>_EL0.evtCount
  KVM: arm64: vgic-v4: Make the doorbell request robust w.r.t preemption
  KVM: arm64: Add missing BTI instructions
  KVM: arm64: Correctly handle page aging notifiers for unaligned memslot
  KVM: arm64: Disable preemption in kvm_arch_hardware_enable()
  KVM: arm64: Handle kvm_arm_init failure correctly in finalize_pkvm
  KVM: arm64: timers: Use CNTHCTL_EL2 when setting non-CNTKCTL_EL1 bits

15 months agoMerge tag 'ext4_for_linus-6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sun, 23 Jul 2023 17:21:49 +0000 (10:21 -0700)]
Merge tag 'ext4_for_linus-6.5-rc3' of git://git./linux/kernel/git/tytso/ext4

Pull ext4 fixes from Ted Ts'o:
 "Bug and regression fixes for 6.5-rc3 for ext4's mballoc and jbd2's
  checkpoint code"

* tag 'ext4_for_linus-6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
  ext4: fix rbtree traversal bug in ext4_mb_use_preallocated
  ext4: fix off by one issue in ext4_mb_choose_next_group_best_avail()
  ext4: correct inline offset when handling xattrs in inode body
  jbd2: remove __journal_try_to_free_buffer()
  jbd2: fix a race when checking checkpoint buffer busy
  jbd2: Fix wrongly judgement for buffer head removing while doing checkpoint
  jbd2: remove journal_clean_one_cp_list()
  jbd2: remove t_checkpoint_io_list
  jbd2: recheck chechpointing non-dirty buffer

15 months agoMerge tag '6.5-rc2-smb3-client-fixes-ver2' of git://git.samba.org/sfrench/cifs-2.6
Linus Torvalds [Sun, 23 Jul 2023 17:16:44 +0000 (10:16 -0700)]
Merge tag '6.5-rc2-smb3-client-fixes-ver2' of git://git.samba.org/sfrench/cifs-2.6

Pull smb client fix from Steve French:
 "Add minor debugging improvement.

  The change improves ability to read a network trace to debug problems
  on encrypted connections which are very common (e.g. using wireshark
  or tcpdump).

  That works today with tools like 'smbinfo keys /mnt/file' but requires
  passing in a filename on the mount (see e.g. [1]), but it often makes
  more sense to just pass in the mount point path (ie a directory not a
  filename).

  So this fix was needed to debug some types of problems (an obvious
  example is on an encrypted connection failing operations on an empty
  share or with no files in the root of the directory) - so you can
  simply pass in the 'smbinfo keys <mntpoint>' and get the information
  that wireshark needs"

Link: https://wiki.samba.org/index.php/Wireshark_Decryption
* tag '6.5-rc2-smb3-client-fixes-ver2' of git://git.samba.org/sfrench/cifs-2.6:
  cifs: update internal module version number for cifs.ko
  cifs: allow dumping keys for directories too

15 months agoMerge tag 'kvm-s390-master-6.5-1' of https://git.kernel.org/pub/scm/linux/kernel...
Paolo Bonzini [Sun, 23 Jul 2023 16:50:30 +0000 (12:50 -0400)]
Merge tag 'kvm-s390-master-6.5-1' of https://git./linux/kernel/git/kvms390/linux into HEAD

Two fixes for asynchronous destroy

15 months agoMerge tag 'kvmarm-fixes-6.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvmar...
Paolo Bonzini [Sun, 23 Jul 2023 16:50:14 +0000 (12:50 -0400)]
Merge tag 'kvmarm-fixes-6.5-1' of git://git./linux/kernel/git/kvmarm/kvmarm into HEAD

KVM/arm64 fixes for 6.5, part #1

 - Avoid pKVM finalization if KVM initialization fails

 - Add missing BTI instructions in the hypervisor, fixing an early boot
   failure on BTI systems

 - Handle MMU notifiers correctly for non hugepage-aligned memslots

 - Work around a bug in the architecture where hypervisor timer controls
   have UNKNOWN behavior under nested virt.

 - Disable preemption in kvm_arch_hardware_enable(), fixing a kernel BUG
   in cpu hotplug resulting from per-CPU accessor sanity checking.

 - Make WFI emulation on GICv4 systems robust w.r.t. preemption,
   consistently requesting a doorbell interrupt on vcpu_put()

 - Uphold RES0 sysreg behavior when emulating older PMU versions

 - Avoid macro expansion when initializing PMU register names, ensuring
   the tracepoints pretty-print the sysreg.

15 months agotracing/histograms: Return an error if we fail to add histogram to hist_vars list
Mohamed Khalfella [Fri, 14 Jul 2023 20:33:41 +0000 (20:33 +0000)]
tracing/histograms: Return an error if we fail to add histogram to hist_vars list

Commit 6018b585e8c6 ("tracing/histograms: Add histograms to hist_vars if
they have referenced variables") added a check to fail histogram creation
if save_hist_vars() failed to add histogram to hist_vars list. But the
commit failed to set ret to failed return code before jumping to
unregister histogram, fix it.

Link: https://lore.kernel.org/linux-trace-kernel/20230714203341.51396-1-mkhalfella@purestorage.com
Cc: stable@vger.kernel.org
Fixes: 6018b585e8c6 ("tracing/histograms: Add histograms to hist_vars if they have referenced variables")
Signed-off-by: Mohamed Khalfella <mkhalfella@purestorage.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
15 months agoring-buffer: Do not swap cpu_buffer during resize process
Chen Lin [Wed, 19 Jul 2023 07:58:47 +0000 (15:58 +0800)]
ring-buffer: Do not swap cpu_buffer during resize process

When ring_buffer_swap_cpu was called during resize process,
the cpu buffer was swapped in the middle, resulting in incorrect state.
Continuing to run in the wrong state will result in oops.

This issue can be easily reproduced using the following two scripts:
/tmp # cat test1.sh
//#! /bin/sh
for i in `seq 0 100000`
do
         echo 2000 > /sys/kernel/debug/tracing/buffer_size_kb
         sleep 0.5
         echo 5000 > /sys/kernel/debug/tracing/buffer_size_kb
         sleep 0.5
done
/tmp # cat test2.sh
//#! /bin/sh
for i in `seq 0 100000`
do
        echo irqsoff > /sys/kernel/debug/tracing/current_tracer
        sleep 1
        echo nop > /sys/kernel/debug/tracing/current_tracer
        sleep 1
done
/tmp # ./test1.sh &
/tmp # ./test2.sh &

A typical oops log is as follows, sometimes with other different oops logs.

[  231.711293] WARNING: CPU: 0 PID: 9 at kernel/trace/ring_buffer.c:2026 rb_update_pages+0x378/0x3f8
[  231.713375] Modules linked in:
[  231.714735] CPU: 0 PID: 9 Comm: kworker/0:1 Tainted: G        W          6.5.0-rc1-00276-g20edcec23f92 #15
[  231.716750] Hardware name: linux,dummy-virt (DT)
[  231.718152] Workqueue: events update_pages_handler
[  231.719714] pstate: 60000005 (nZCv daif -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[  231.721171] pc : rb_update_pages+0x378/0x3f8
[  231.722212] lr : rb_update_pages+0x25c/0x3f8
[  231.723248] sp : ffff800082b9bd50
[  231.724169] x29: ffff800082b9bd50 x28: ffff8000825f7000 x27: 0000000000000000
[  231.726102] x26: 0000000000000001 x25: fffffffffffff010 x24: 0000000000000ff0
[  231.728122] x23: ffff0000c3a0b600 x22: ffff0000c3a0b5c0 x21: fffffffffffffe0a
[  231.730203] x20: ffff0000c3a0b600 x19: ffff0000c0102400 x18: 0000000000000000
[  231.732329] x17: 0000000000000000 x16: 0000000000000000 x15: 0000ffffe7aa8510
[  231.734212] x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000002
[  231.736291] x11: ffff8000826998a8 x10: ffff800082b9baf0 x9 : ffff800081137558
[  231.738195] x8 : fffffc00030e82c8 x7 : 0000000000000000 x6 : 0000000000000001
[  231.740192] x5 : ffff0000ffbafe00 x4 : 0000000000000000 x3 : 0000000000000000
[  231.742118] x2 : 00000000000006aa x1 : 0000000000000001 x0 : ffff0000c0007208
[  231.744196] Call trace:
[  231.744892]  rb_update_pages+0x378/0x3f8
[  231.745893]  update_pages_handler+0x1c/0x38
[  231.746893]  process_one_work+0x1f0/0x468
[  231.747852]  worker_thread+0x54/0x410
[  231.748737]  kthread+0x124/0x138
[  231.749549]  ret_from_fork+0x10/0x20
[  231.750434] ---[ end trace 0000000000000000 ]---
[  233.720486] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000
[  233.721696] Mem abort info:
[  233.721935]   ESR = 0x0000000096000004
[  233.722283]   EC = 0x25: DABT (current EL), IL = 32 bits
[  233.722596]   SET = 0, FnV = 0
[  233.722805]   EA = 0, S1PTW = 0
[  233.723026]   FSC = 0x04: level 0 translation fault
[  233.723458] Data abort info:
[  233.723734]   ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000
[  233.724176]   CM = 0, WnR = 0, TnD = 0, TagAccess = 0
[  233.724589]   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0
[  233.725075] user pgtable: 4k pages, 48-bit VAs, pgdp=0000000104943000
[  233.725592] [0000000000000000] pgd=0000000000000000, p4d=0000000000000000
[  233.726231] Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP
[  233.726720] Modules linked in:
[  233.727007] CPU: 0 PID: 9 Comm: kworker/0:1 Tainted: G        W          6.5.0-rc1-00276-g20edcec23f92 #15
[  233.727777] Hardware name: linux,dummy-virt (DT)
[  233.728225] Workqueue: events update_pages_handler
[  233.728655] pstate: 200000c5 (nzCv daIF -PAN -UAO -TCO -DIT -SSBS BTYPE=--)
[  233.729054] pc : rb_update_pages+0x1a8/0x3f8
[  233.729334] lr : rb_update_pages+0x154/0x3f8
[  233.729592] sp : ffff800082b9bd50
[  233.729792] x29: ffff800082b9bd50 x28: ffff8000825f7000 x27: 0000000000000000
[  233.730220] x26: 0000000000000000 x25: ffff800082a8b840 x24: ffff0000c0102418
[  233.730653] x23: 0000000000000000 x22: fffffc000304c880 x21: 0000000000000003
[  233.731105] x20: 00000000000001f4 x19: ffff0000c0102400 x18: ffff800082fcbc58
[  233.731727] x17: 0000000000000000 x16: 0000000000000001 x15: 0000000000000001
[  233.732282] x14: ffff8000825fe0c8 x13: 0000000000000001 x12: 0000000000000000
[  233.732709] x11: ffff8000826998a8 x10: 0000000000000ae0 x9 : ffff8000801b760c
[  233.733148] x8 : fefefefefefefeff x7 : 0000000000000018 x6 : ffff0000c03298c0
[  233.733553] x5 : 0000000000000002 x4 : 0000000000000000 x3 : 0000000000000000
[  233.733972] x2 : ffff0000c3a0b600 x1 : 0000000000000000 x0 : 0000000000000000
[  233.734418] Call trace:
[  233.734593]  rb_update_pages+0x1a8/0x3f8
[  233.734853]  update_pages_handler+0x1c/0x38
[  233.735148]  process_one_work+0x1f0/0x468
[  233.735525]  worker_thread+0x54/0x410
[  233.735852]  kthread+0x124/0x138
[  233.736064]  ret_from_fork+0x10/0x20
[  233.736387] Code: 92400000 910006b5 aa000021 aa0303f7 (f9400060)
[  233.736959] ---[ end trace 0000000000000000 ]---

After analysis, the seq of the error is as follows [1-5]:

int ring_buffer_resize(struct trace_buffer *buffer, unsigned long size,
int cpu_id)
{
for_each_buffer_cpu(buffer, cpu) {
cpu_buffer = buffer->buffers[cpu];
//1. get cpu_buffer, aka cpu_buffer(A)
...
...
schedule_work_on(cpu,
 &cpu_buffer->update_pages_work);
//2. 'update_pages_work' is queue on 'cpu', cpu_buffer(A) is passed to
// update_pages_handler, do the update process, set 'update_done' in
// complete(&cpu_buffer->update_done) and to wakeup resize process.
//---->
//3. Just at this moment, ring_buffer_swap_cpu is triggered,
//cpu_buffer(A) be swaped to cpu_buffer(B), the max_buffer.
//ring_buffer_swap_cpu is called as the 'Call trace' below.

Call trace:
 dump_backtrace+0x0/0x2f8
 show_stack+0x18/0x28
 dump_stack+0x12c/0x188
 ring_buffer_swap_cpu+0x2f8/0x328
 update_max_tr_single+0x180/0x210
 check_critical_timing+0x2b4/0x2c8
 tracer_hardirqs_on+0x1c0/0x200
 trace_hardirqs_on+0xec/0x378
 el0_svc_common+0x64/0x260
 do_el0_svc+0x90/0xf8
 el0_svc+0x20/0x30
 el0_sync_handler+0xb0/0xb8
 el0_sync+0x180/0x1c0
//<----

/* wait for all the updates to complete */
for_each_buffer_cpu(buffer, cpu) {
cpu_buffer = buffer->buffers[cpu];
//4. get cpu_buffer, cpu_buffer(B) is used in the following process,
//the state of cpu_buffer(A) and cpu_buffer(B) is totally wrong.
//for example, cpu_buffer(A)->update_done will leave be set 1, and will
//not 'wait_for_completion' at the next resize round.
  if (!cpu_buffer->nr_pages_to_update)
continue;

if (cpu_online(cpu))
wait_for_completion(&cpu_buffer->update_done);
cpu_buffer->nr_pages_to_update = 0;
}
...
}
//5. the state of cpu_buffer(A) and cpu_buffer(B) is totally wrong,
//Continuing to run in the wrong state, then oops occurs.

Link: https://lore.kernel.org/linux-trace-kernel/202307191558478409990@zte.com.cn
Signed-off-by: Chen Lin <chen.lin5@zte.com.cn>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
15 months agotracing: Remove unused extern declaration tracing_map_set_field_descr()
YueHaibing [Sat, 22 Jul 2023 03:21:23 +0000 (11:21 +0800)]
tracing: Remove unused extern declaration tracing_map_set_field_descr()

Since commit 08d43a5fa063 ("tracing: Add lock-free tracing_map"),
this is never used, so can be removed.

Link: https://lore.kernel.org/linux-trace-kernel/20230722032123.24664-1-yuehaibing@huawei.com
Cc: <mhiramat@kernel.org>
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
15 months agokbuild: flatten KBUILD_CFLAGS
Alexey Dobriyan [Thu, 13 Jul 2023 18:52:28 +0000 (21:52 +0300)]
kbuild: flatten KBUILD_CFLAGS

Make it slightly easier to see which compiler options are added and
removed (and not worry about column limit too!).

Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com>
Reviewed-by: Nicolas Schier <n.schier@avm.de>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
15 months agogen_compile_commands: add assembly files to compilation database
Benjamin Gray [Wed, 19 Jul 2023 03:19:12 +0000 (13:19 +1000)]
gen_compile_commands: add assembly files to compilation database

Like C source files, tooling can find it useful to have the assembly
source file compilation recorded.

The .S extension appears to used across all architectures.

Signed-off-by: Benjamin Gray <bgray@linux.ibm.com>
Reviewed-by: Fangrui Song <maskray@google.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
15 months agoext4: fix rbtree traversal bug in ext4_mb_use_preallocated
Ojaswin Mujoo [Sat, 22 Jul 2023 17:15:24 +0000 (22:45 +0530)]
ext4: fix rbtree traversal bug in ext4_mb_use_preallocated

During allocations, while looking for preallocations(PA) in the per
inode rbtree, we can't do a direct traversal of the tree because
ext4_mb_discard_group_preallocation() can paralelly mark the pa deleted
and that can cause direct traversal to skip some entries. This was
leading to a BUG_ON() being hit [1] when we missed a PA that could satisfy
our request and ultimately tried to create a new PA that would overlap
with the missed one.

To makes sure we handle that case while still keeping the performance of
the rbtree, we make use of the fact that the only pa that could possibly
overlap the original goal start is the one that satisfies the below
conditions:

  1. It must have it's logical start immediately to the left of
  (ie less than) original logical start.

  2. It must not be deleted

To find this pa we use the following traversal method:

1. Descend into the rbtree normally to find the immediate neighboring
PA. Here we keep descending irrespective of if the PA is deleted or if
it overlaps with our request etc. The goal is to find an immediately
adjacent PA.

2. If the found PA is on right of original goal, use rb_prev() to find
the left adjacent PA.

3. Check if this PA is deleted and keep moving left with rb_prev() until
a non deleted PA is found.

4. This is the PA we are looking for. Now we can check if it can satisfy
the original request and proceed accordingly.

This approach also takes care of having deleted PAs in the tree.

(While we are at it, also fix a possible overflow bug in calculating the
end of a PA)

[1] https://lore.kernel.org/linux-ext4/CA+G9fYv2FRpLqBZf34ZinR8bU2_ZRAUOjKAD3+tKRFaEQHtt8Q@mail.gmail.com/

Cc: stable@kernel.org # 6.4
Fixes: 3872778664e3 ("ext4: Use rbtrees to manage PAs instead of inode i_prealloc_list")
Signed-off-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Reviewed-by: Ritesh Harjani (IBM) ritesh.list@gmail.com
Tested-by: Ritesh Harjani (IBM) ritesh.list@gmail.com
Link: https://lore.kernel.org/r/edd2efda6a83e6343c5ace9deea44813e71dbe20.1690045963.git.ojaswin@linux.ibm.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
15 months agoext4: fix off by one issue in ext4_mb_choose_next_group_best_avail()
Ojaswin Mujoo [Fri, 9 Jun 2023 10:34:03 +0000 (16:04 +0530)]
ext4: fix off by one issue in ext4_mb_choose_next_group_best_avail()

In ext4_mb_choose_next_group_best_avail(), we want the start order to be
1 less than goal length and the min_order to be, at max, 1 more than the
original length. This commit fixes an off by one issue that arose due to
the fact that 1 << fls(n) > (n).

After all the processing:

order = 1 order below goal len
min_order = maximum of the three:-
             - order - trim_order
             - 1 order below B2C(s_stripe)
             - 1 order above original len

Cc: stable@kernel.org
Fixes: 33122aa930 ("ext4: Add allocation criteria 1.5 (CR1_5)")
Signed-off-by: Ojaswin Mujoo <ojaswin@linux.ibm.com>
Link: https://lore.kernel.org/r/20230609103403.112807-1-ojaswin@linux.ibm.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
15 months agoext4: correct inline offset when handling xattrs in inode body
Eric Whitney [Mon, 22 May 2023 18:15:20 +0000 (14:15 -0400)]
ext4: correct inline offset when handling xattrs in inode body

When run on a file system where the inline_data feature has been
enabled, xfstests generic/269, generic/270, and generic/476 cause ext4
to emit error messages indicating that inline directory entries are
corrupted.  This occurs because the inline offset used to locate
inline directory entries in the inode body is not updated when an
xattr in that shared region is deleted and the region is shifted in
memory to recover the space it occupied.  If the deleted xattr precedes
the system.data attribute, which points to the inline directory entries,
that attribute will be moved further up in the region.  The inline
offset continues to point to whatever is located in system.data's former
location, with unfortunate effects when used to access directory entries
or (presumably) inline data in the inode body.

Cc: stable@kernel.org
Signed-off-by: Eric Whitney <enwlinux@gmail.com>
Link: https://lore.kernel.org/r/20230522181520.1570360-1-enwlinux@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
15 months agoMerge tag 'powerpc-6.5-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
Linus Torvalds [Sun, 23 Jul 2023 02:32:00 +0000 (19:32 -0700)]
Merge tag 'powerpc-6.5-4' of git://git./linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:

 - Reinstate support for little endian ELFv1 binaries, which it turns
   out still exist in the wild.

 - Revert a change which used asm goto for WARN_ON/__WARN_FLAGS, as it
   lead to dead code generation and seemed to trigger compiler bugs in
   some edge cases.

 - Fix a deadlock in the pseries VAS code, between live migration and
   the driver's mmap handler.

 - Disable KCOV instrumentation in the powerpc KASAN code.

Thanks to Andrew Donnellan, Benjamin Gray, Christophe Leroy, Haren
Myneni, Russell Currey, and Uwe Kleine-König.

* tag 'powerpc-6.5-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  Revert "powerpc/64s: Remove support for ELFv1 little endian userspace"
  powerpc/kasan: Disable KCOV in KASAN code
  powerpc/512x: lpbfifo: Convert to platform remove callback returning void
  powerpc/crypto: Add gitignore for generated P10 AES/GCM .S files
  Revert "powerpc/bug: Provide better flexibility to WARN_ON/__WARN_FLAGS() with asm goto"
  powerpc/pseries/vas: Hold mmap_mutex after mmap lock during window close

15 months agocifs: update internal module version number for cifs.ko
Steve French [Thu, 20 Jul 2023 13:30:32 +0000 (08:30 -0500)]
cifs: update internal module version number for cifs.ko

From 2.43 to 2.44

Signed-off-by: Steve French <stfrench@microsoft.com>
15 months agocifs: allow dumping keys for directories too
Shyam Prasad N [Fri, 16 Jun 2023 10:37:46 +0000 (10:37 +0000)]
cifs: allow dumping keys for directories too

Dumping the enc/dec keys is a session wide operation.
And it should not matter if the ioctl was run on
a regular file or a directory.

Currently, we obtain the tcon pointer from the
cifs file handle. But since there's no dir open call
in cifs, this is not populated for dirs.

This change allows dumping of session keys using ioctl
even for directories. To do this, we'll now get the
tcon pointer from the superblock, and not from the file
handle.

Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
15 months agoMerge tag 's390-6.5-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Linus Torvalds [Sat, 22 Jul 2023 18:24:03 +0000 (11:24 -0700)]
Merge tag 's390-6.5-3' of git://git./linux/kernel/git/s390/linux

Pull s390 fixes from Heiko Carstens:

 - Fix per vma lock fault handling: add missing !(fault & VM_FAULT_ERROR)
   check to fault handler to prevent error handling for return values
   that don't indicate an error

 - Use kfree_sensitive() instead of kfree() in paes crypto code to clear
   memory that may contain keys before freeing it

 - Fix reply buffer size calculation for CCA replies in zcrypt device
   driver

* tag 's390-6.5-3' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/zcrypt: fix reply buffer calculations for CCA replies
  s390/crypto: use kfree_sensitive() instead of kfree()
  s390/mm: fix per vma lock fault handling

15 months agoMerge tag 'block-6.5-2023-07-21' of git://git.kernel.dk/linux
Linus Torvalds [Sat, 22 Jul 2023 18:05:15 +0000 (11:05 -0700)]
Merge tag 'block-6.5-2023-07-21' of git://git.kernel.dk/linux

Pull block fixes from Jens Axboe:

 - Fix for loop regressions (Mauricio)

 - Fix a potential stall with batched wakeups in sbitmap (David)

 - Fix for stall with recursive plug flushes (Ross)

 - Skip accounting of empty requests for blk-iocost (Chengming)

 - Remove a dead field in struct blk_mq_hw_ctx (Chengming)

* tag 'block-6.5-2023-07-21' of git://git.kernel.dk/linux:
  loop: do not enforce max_loop hard limit by (new) default
  loop: deprecate autoloading callback loop_probe()
  sbitmap: fix batching wakeup
  blk-iocost: skip empty flush bio in iocost
  blk-mq: delete dead struct blk_mq_hw_ctx->queued field
  blk-mq: Fix stall due to recursive flush plug

15 months agoMerge tag 'io_uring-6.5-2023-07-21' of git://git.kernel.dk/linux
Linus Torvalds [Sat, 22 Jul 2023 17:46:30 +0000 (10:46 -0700)]
Merge tag 'io_uring-6.5-2023-07-21' of git://git.kernel.dk/linux

Pull io_uring fixes from Jens Axboe:

 - Fix for io-wq not always honoring REQ_F_NOWAIT, if it was set and
   punted directly (eg via DRAIN) (me)

 - Capability check fix (Ondrej)

 - Regression fix for the mmap changes that went into 6.4, which
   apparently broke IA64 (Helge)

* tag 'io_uring-6.5-2023-07-21' of git://git.kernel.dk/linux:
  ia64: mmap: Consider pgoff when searching for free mapping
  io_uring: Fix io_uring mmap() by using architecture-provided get_unmapped_area()
  io_uring: treat -EAGAIN for REQ_F_NOWAIT as final for io-wq
  io_uring: don't audit the capability check in io_uring_create()

15 months agoMerge tag 'devicetree-fixes-for-6.5-1' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 22 Jul 2023 17:28:22 +0000 (10:28 -0700)]
Merge tag 'devicetree-fixes-for-6.5-1' of git://git./linux/kernel/git/robh/linux

Pull devicetree fixes from Rob Herring:

 - Fix moortec,mr75203 schema usage of 'multipleOf' keyword

 - Fix regression in systems depending on "of-display" device name

 - Build fix for s390 with CONFIG_PCI=n and OF_EARLY_FLATTREE=y

 - Drop two obsolete serial .txt bindings

* tag 'devicetree-fixes-for-6.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux:
  dt-bindings: serial: Remove obsolete nxp,lpc1850-uart.txt
  dt-bindings: serial: Remove obsolete cavium-uart.txt
  dt-bindings: hwmon: moortec,mr75203: fix multipleOf for coefficients
  of: Preserve "of-display" device name for compatibility
  of: make OF_EARLY_FLATTREE depend on HAS_IOMEM

15 months agoMerge tag 'regmap-fix-v6.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Sat, 22 Jul 2023 17:20:56 +0000 (10:20 -0700)]
Merge tag 'regmap-fix-v6.5-rc2' of git://git./linux/kernel/git/broonie/regmap

Pull regmap fixes from Mark Brown:
 "Three fixes here:

   - The issues with accounting for register and padding length on raw
     buses turn out to be quite widespread in custom buses.

     In order to avoid disturbing anything drop the initial fixes and
     fall back to a point fix in the SMBus code where the issue was
     originally noticed, a more substantial refactoring of the API which
     ensures that all buses make the same assumptions will follow.

   - The generic regcache code had been forcing on async I/O which did
     not work with the new maple tree sync code when used with SPI.

     Since that was mainly for the rbtree cache and the assumptions
     about hardware that drove the choice are probably not true any more
     fix this by pushing the enablement of async down into the rbtree
     code.

     This probably also makes cache syncs for systems faster though it's
     not the point.

   - The test code was triggering use of the rbtree and maple tree
     caches with dynamic allocation of nodes since all the testing is
     with RAM backed caches with no I/O performance issues.

     Just disable the locking in the tests to avoid triggering warnings
     when allocation debugging is turned on, it's not really what's
     being tested"

* tag 'regmap-fix-v6.5-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/regmap:
  regmap: Disable locking for RBTREE and MAPLE unit tests
  regcache: Push async I/O request down into the rbtree cache
  regmap: Account for register length in SMBus I/O limits
  regmap: Drop initial version of maximum transfer length fixes

15 months agoMerge tag 'gpio-fixes-for-v6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Sat, 22 Jul 2023 17:14:04 +0000 (10:14 -0700)]
Merge tag 'gpio-fixes-for-v6.5-rc3' of git://git./linux/kernel/git/brgl/linux

Pull gpio fixes from Bartosz Golaszewski:

 - fix initial value handling for output-only pins in gpio-tps68470

 - fix two resource leaks in gpio-mvebu

* tag 'gpio-fixes-for-v6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/brgl/linux:
  gpio: mvebu: fix irq domain leak
  gpio: mvebu: Make use of devm_pwmchip_add
  gpio: tps68470: Make tps68470_gpio_output() always set the initial value

15 months agodt-bindings: serial: Remove obsolete nxp,lpc1850-uart.txt
Rob Herring [Fri, 7 Jul 2023 22:16:06 +0000 (16:16 -0600)]
dt-bindings: serial: Remove obsolete nxp,lpc1850-uart.txt

nxp,lpc1850-uart.txt binding is already covered by 8250.yaml, so remove
it.

Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230707221607.1064888-1-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
15 months agodt-bindings: serial: Remove obsolete cavium-uart.txt
Rob Herring [Fri, 7 Jul 2023 22:16:02 +0000 (16:16 -0600)]
dt-bindings: serial: Remove obsolete cavium-uart.txt

cavium-uart.txt binding is already covered by 8250.yaml, so remove it.

Reviewed-by: Conor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20230707221602.1063972-1-robh@kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
15 months agoloop: do not enforce max_loop hard limit by (new) default
Mauricio Faria de Oliveira [Thu, 20 Jul 2023 14:30:33 +0000 (11:30 -0300)]
loop: do not enforce max_loop hard limit by (new) default

Problem:

The max_loop parameter is used for 2 different purposes:

1) initial number of loop devices to pre-create on init
2) maximum number of loop devices to add on access/open()

Historically, its default value (zero) caused 1) to create non-zero
number of devices (CONFIG_BLK_DEV_LOOP_MIN_COUNT), and no hard limit on
2) to add devices with autoloading.

However, the default value changed in commit 85c50197716c ("loop: Fix
the max_loop commandline argument treatment when it is set to 0") to
CONFIG_BLK_DEV_LOOP_MIN_COUNT, for max_loop=0 not to pre-create devices.

That does improve 1), but unfortunately it breaks 2), as the default
behavior changed from no-limit to hard-limit.

Example:

For example, this userspace code broke for N >= CONFIG, if the user
relied on the default value 0 for max_loop:

    mknod("/dev/loopN");
    open("/dev/loopN");  // now fails with ENXIO

Though affected users may "fix" it with (loop.)max_loop=0, this means to
require a kernel parameter change on stable kernel update (that commit
Fixes: an old commit in stable).

Solution:

The original semantics for the default value in 2) can be applied if the
parameter is not set (ie, default behavior).

This still keeps the intended function in 1) and 2) if set, and that
commit's intended improvement in 1) if max_loop=0.

Before 85c50197716c:
  - default:     1) CONFIG devices   2) no limit
  - max_loop=0:  1) CONFIG devices   2) no limit
  - max_loop=X:  1) X devices        2) X limit

After 85c50197716c:
  - default:     1) CONFIG devices   2) CONFIG limit (*)
  - max_loop=0:  1) 0 devices (*)    2) no limit
  - max_loop=X:  1) X devices        2) X limit

This commit:
  - default:     1) CONFIG devices   2) no limit (*)
  - max_loop=0:  1) 0 devices        2) no limit
  - max_loop=X:  1) X devices        2) X limit

Future:

The issue/regression from that commit only affects code under the
CONFIG_BLOCK_LEGACY_AUTOLOAD deprecation guard, thus the fix too is
contained under it.

Once that deprecated functionality/code is removed, the purpose 2) of
max_loop (hard limit) is no longer in use, so the module parameter
description can be changed then.

Tests:

Linux 6.4-rc7
CONFIG_BLK_DEV_LOOP_MIN_COUNT=8
CONFIG_BLOCK_LEGACY_AUTOLOAD=y

- default (original)

# ls -1 /dev/loop*
/dev/loop-control
/dev/loop0
...
/dev/loop7

# ./test-loop
open: /dev/loop8: No such device or address

- default (patched)

# ls -1 /dev/loop*
/dev/loop-control
/dev/loop0
...
/dev/loop7

# ./test-loop
#

- max_loop=0 (original & patched):

# ls -1 /dev/loop*
/dev/loop-control

# ./test-loop
#

- max_loop=8 (original & patched):

# ls -1 /dev/loop*
/dev/loop-control
/dev/loop0
...
/dev/loop7

# ./test-loop
open: /dev/loop8: No such device or address

- max_loop=0 (patched; CONFIG_BLOCK_LEGACY_AUTOLOAD is not set)

# ls -1 /dev/loop*
/dev/loop-control

# ./test-loop
open: /dev/loop8: No such device or address

Fixes: 85c50197716c ("loop: Fix the max_loop commandline argument treatment when it is set to 0")
Signed-off-by: Mauricio Faria de Oliveira <mfo@canonical.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20230720143033.841001-3-mfo@canonical.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
15 months agoloop: deprecate autoloading callback loop_probe()
Mauricio Faria de Oliveira [Thu, 20 Jul 2023 14:30:32 +0000 (11:30 -0300)]
loop: deprecate autoloading callback loop_probe()

The 'probe' callback in __register_blkdev() is only used under the
CONFIG_BLOCK_LEGACY_AUTOLOAD deprecation guard.

The loop_probe() function is only used for that callback, so guard it
too, accordingly.

See commit fbdee71bb5d8 ("block: deprecate autoloading based on dev_t").

Signed-off-by: Mauricio Faria de Oliveira <mfo@canonical.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20230720143033.841001-2-mfo@canonical.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
15 months agosbitmap: fix batching wakeup
David Jeffery [Fri, 21 Jul 2023 09:57:15 +0000 (17:57 +0800)]
sbitmap: fix batching wakeup

Current code supposes that it is enough to provide forward progress by
just waking up one wait queue after one completion batch is done.

Unfortunately this way isn't enough, cause waiter can be added to wait
queue just after it is woken up.

Follows one example(64 depth, wake_batch is 8)

1) all 64 tags are active

2) in each wait queue, there is only one single waiter

3) each time one completion batch(8 completions) wakes up just one
   waiter in each wait queue, then immediately one new sleeper is added
   to this wait queue

4) after 64 completions, 8 waiters are wakeup, and there are still 8
   waiters in each wait queue

5) after another 8 active tags are completed, only one waiter can be
   wakeup, and the other 7 can't be waken up anymore.

Turns out it isn't easy to fix this problem, so simply wakeup enough
waiters for single batch.

Cc: Kemeng Shi <shikemeng@huaweicloud.com>
Cc: Chengming Zhou <zhouchengming@bytedance.com>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: David Jeffery <djeffery@redhat.com>
Signed-off-by: Ming Lei <ming.lei@redhat.com>
Reviewed-by: Gabriel Krisman Bertazi <krisman@suse.de>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Link: https://lore.kernel.org/r/20230721095715.232728-1-ming.lei@redhat.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
15 months agoMerge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Linus Torvalds [Fri, 21 Jul 2023 17:24:21 +0000 (10:24 -0700)]
Merge tag 'arm64-fixes' of git://git./linux/kernel/git/arm64/linux

Pull arm64 fixes from Will Deacon:
 "I've picked up a handful of arm64 fixes while Catalin's been away, so
  here they are. Below is the usual summary, but we have basically have
  two cleanups, a fix for an SME crash and a fix for hibernation:

   - Fix saving of SME state after SVE vector length is changed

   - Fix sparse warnings for missing vDSO function prototypes

   - Fix hibernation resume path when kfence is enabled

   - Fix field names for the HFGxTR_EL2 register"

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64/fpsimd: Ensure SME storage is allocated after SVE VL changes
  arm64: vdso: Clear common make C=2 warnings
  arm64: mm: Make hibernation aware of KFENCE
  arm64: Fix HFGxTR_EL2 field naming

15 months agoMerge tag 'pm-6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm
Linus Torvalds [Fri, 21 Jul 2023 17:16:20 +0000 (10:16 -0700)]
Merge tag 'pm-6.5-rc3' of git://git./linux/kernel/git/rafael/linux-pm

Pull power management fixes from Rafael Wysocki:
 "Revert three recent intel_idle commits that introduced a functional
  issue, included a coding mistake and have been questioned at the
  design level"

* tag 'pm-6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  Revert "intel_idle: Add support for using intel_idle in a VM guest using just hlt"
  Revert "intel_idle: Add a "Long HLT" C1 state for the VM guest mode"
  Revert "intel_idle: Add __init annotation to matchup_vm_state_with_baremetal()"

15 months agoMerge tag 'sound-6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai...
Linus Torvalds [Fri, 21 Jul 2023 17:10:18 +0000 (10:10 -0700)]
Merge tag 'sound-6.5-rc3' of git://git./linux/kernel/git/tiwai/sound

Pull sound fixes from Takashi Iwai:
 "A pile of fixes that have been gathered since the previous pull. Most
  of changes are device-specific, and nothing looks too scary.

   - A memory leak fix in ALSA sequencer code in 6.5-rc

   - Many fixes for ASoC Qualcomm CODEC drivers, covering SoundWire
     probe problems

   - A series of ASoC AMD fixes

   - A few fixes and cleanups of selftest stuff

   - HD-audio codec fixes and quirks for Clevo, HP, Lenovo, Dell"

* tag 'sound-6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (52 commits)
  ALSA: hda/realtek: Add support for DELL Oasis 13/14/16 laptops
  ALSA: hda/realtek: Fix generic fixup definition for cs35l41 amp
  ALSA: hda/realtek: Enable Mute LED on HP Laptop 15s-eq2xxx
  selftests: ALSA: Add test-pcmtest-driver to .gitignore
  ALSA: hda/realtek: Add quirk for Clevo NS70AU
  ASoC: fsl_sai: Disable bit clock with transmitter
  ALSA: seq: Fix memory leak at error path in snd_seq_create_port()
  ASoC: SOF: ipc3-dtrace: uninitialized data in dfsentry_trace_filter_write()
  ASoC: cs42l51: fix driver to properly autoload with automatic module loading
  MAINTAINERS: Redo addition of ssm3515 to APPLE SOUND
  ASoC: rt5640: Fix the issue of speaker noise
  ALSA: hda/realtek - remove 3k pull low procedure
  selftests: ALSA: Fix fclose on an already fclosed file pointer
  ALSA: pcmtest: Don't use static storage to track per device data
  ALSA: pcmtest: Convert to platform remove callback returning void
  ASoC: dt-bindings: audio-graph-card2: Drop incomplete example
  ASoC: dt-bindings: Update maintainer email id
  ASoC: amd: ps: Fix extraneous error messages
  ASoC: fsl_sai: Revert "ASoC: fsl_sai: Enable MCTL_MCLK_EN bit for master mode"
  ASoC: codecs: SND_SOC_WCD934X should select REGMAP_IRQ
  ...

15 months agoMerge tag 'fbdev-for-6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller...
Linus Torvalds [Fri, 21 Jul 2023 17:00:09 +0000 (10:00 -0700)]
Merge tag 'fbdev-for-6.5-rc3' of git://git./linux/kernel/git/deller/linux-fbdev

Pull fbdev fixes and cleanups from Helge Deller:
 "Just the usual bunch of code cleanups in various drivers, this time
  mostly in vgacon and imxfb:

   - Code cleanup in vgacon (Jiri Slaby)

   - Explicitly include correct DT includes (Rob Herring)

   - imxfb code cleanup (Yangtao Li, Martin Kaiser)

   - kyrofb: make arrays const and smaller (Colin Ian King)

   - ep93xx-fb: return value check fix (Yuanjun Gong)

   - au1200fb: add missing IRQ check (Zhang Shurong)"

* tag 'fbdev-for-6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/linux-fbdev:
  fbdev: Explicitly include correct DT includes
  fbdev: ep93xx-fb: fix return value check in ep93xxfb_probe
  fbdev: au1200fb: Fix missing IRQ check in au1200fb_drv_probe
  fbdev: kyro: make some const read-only arrays static and reduce type size
  fbcon: remove unused display (p) from fbcon_redraw()
  sticon: make sticon_set_def_font() void and remove op parameter
  vgacon: cache vc_cell_height in vgacon_cursor()
  vgacon: let vgacon_doresize() return void
  vgacon: remove unused xpos from vgacon_set_cursor_size()
  vgacon: remove unneeded forward declarations
  vgacon: switch vgacon_scrolldelta() and vgacon_restore_screen()
  fbdev: imxfb: remove unneeded labels
  fbdev: imxfb: Convert to devm_platform_ioremap_resource()
  fbdev: imxfb: Convert to devm_kmalloc_array()
  fbdev: imxfb: Removed unneeded release_mem_region
  fbdev: imxfb: switch to DEFINE_SIMPLE_DEV_PM_OPS
  fbdev: imxfb: warn about invalid left/right margin

15 months agodrm/atomic: Fix potential use-after-free in nonblocking commits
Daniel Vetter [Fri, 21 Jul 2023 13:58:38 +0000 (15:58 +0200)]
drm/atomic: Fix potential use-after-free in nonblocking commits

This requires a bit of background.  Properly done a modeset driver's
unload/remove sequence should be

drm_dev_unplug();
drm_atomic_helper_shutdown();
drm_dev_put();

The trouble is that the drm_dev_unplugged() checks are by design racy,
they do not synchronize against all outstanding ioctl.  This is because
those ioctl could block forever (both for modeset and for driver
specific ioctls), leading to deadlocks in hotunplug.  Instead the code
sections that touch the hardware need to be annotated with
drm_dev_enter/exit, to avoid accessing hardware resources after the
unload/remove has finished.

To avoid use-after-free issues all the involved userspace visible
objects are supposed to hold a reference on the underlying drm_device,
like drm_file does.

The issue now is that we missed one, the atomic modeset ioctl can be run
in a nonblocking fashion, and in that case it cannot rely on the implied
drm_device reference provided by the ioctl calling context.  This can
result in a use-after-free if an nonblocking atomic commit is carefully
raced against a driver unload.

Fix this by unconditionally grabbing a drm_device reference for any
drm_atomic_state structures.  Strictly speaking this isn't required for
blocking commits and TEST_ONLY calls, but it's the simpler approach.

Thanks to shanzhulig for the initial idea of grabbing an unconditional
reference, I just added comments, a condensed commit message and fixed a
minor potential issue in where exactly we drop the final reference.

Reported-by: shanzhulig <shanzhulig@gmail.com>
Suggested-by: shanzhulig <shanzhulig@gmail.com>
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Cc: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Cc: Thomas Zimmermann <tzimmermann@suse.de>
Cc: David Airlie <airlied@gmail.com>
Cc: stable@kernel.org
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
15 months agoia64: mmap: Consider pgoff when searching for free mapping
Helge Deller [Fri, 21 Jul 2023 15:24:32 +0000 (17:24 +0200)]
ia64: mmap: Consider pgoff when searching for free mapping

IA64 is the only architecture which does not consider the pgoff value when
searching for a possible free memory region with vm_unmapped_area().
Adding this seems to have no negative side effect on IA64, so add it now
to make IA64 consistent with all other architectures.

Cc: stable@vger.kernel.org # 6.4
Signed-off-by: Helge Deller <deller@gmx.de>
Tested-by: matoro <matoro_mailinglist_kernel@matoro.tk>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: linux-ia64@vger.kernel.org
Link: https://lore.kernel.org/r/20230721152432.196382-3-deller@gmx.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
15 months agoio_uring: Fix io_uring mmap() by using architecture-provided get_unmapped_area()
Helge Deller [Fri, 21 Jul 2023 15:24:31 +0000 (17:24 +0200)]
io_uring: Fix io_uring mmap() by using architecture-provided get_unmapped_area()

The io_uring testcase is broken on IA-64 since commit d808459b2e31
("io_uring: Adjust mapping wrt architecture aliasing requirements").

The reason is, that this commit introduced an own architecture
independend get_unmapped_area() search algorithm which finds on IA-64 a
memory region which is outside of the regular memory region used for
shared userspace mappings and which can't be used on that platform
due to aliasing.

To avoid similar problems on IA-64 and other platforms in the future,
it's better to switch back to the architecture-provided
get_unmapped_area() function and adjust the needed input parameters
before the call. Beside fixing the issue, the function now becomes
easier to understand and maintain.

This patch has been successfully tested with the io_uring testcase on
physical x86-64, ppc64le, IA-64 and PA-RISC machines. On PA-RISC the LTP
mmmap testcases did not report any regressions.

Cc: stable@vger.kernel.org # 6.4
Signed-off-by: Helge Deller <deller@gmx.de>
Reported-by: matoro <matoro_mailinglist_kernel@matoro.tk>
Fixes: d808459b2e31 ("io_uring: Adjust mapping wrt architecture aliasing requirements")
Link: https://lore.kernel.org/r/20230721152432.196382-2-deller@gmx.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
15 months agoarm64/fpsimd: Ensure SME storage is allocated after SVE VL changes
Mark Brown [Thu, 20 Jul 2023 18:38:58 +0000 (19:38 +0100)]
arm64/fpsimd: Ensure SME storage is allocated after SVE VL changes

When we reconfigure the SVE vector length we discard the backing storage
for the SVE vectors and then reallocate on next SVE use, leaving the SME
specific state alone. This means that we do not enable SME traps if they
were already disabled. That means that userspace code can enter streaming
mode without trapping, putting the task in a state where if we try to save
the state of the task we will fault.

Since the ABI does not specify that changing the SVE vector length disturbs
SME state, and since SVE code may not be aware of SME code in the process,
we shouldn't simply discard any ZA state. Instead immediately reallocate
the storage for SVE, and disable SME if we change the SVE vector length
while there is no SME state active.

Disabling SME traps on SVE vector length changes would make the overall
code more complex since we would have a state where we have valid SME state
stored but might get a SME trap.

Fixes: 9e4ab6c89109 ("arm64/sme: Implement vector length configuration prctl()s")
Reported-by: David Spickett <David.Spickett@arm.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/20230720-arm64-fix-sve-sme-vl-change-v2-1-8eea06b82d57@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
15 months agoMerge tag 'drm-fixes-2023-07-21' of git://anongit.freedesktop.org/drm/drm
Linus Torvalds [Fri, 21 Jul 2023 03:35:38 +0000 (20:35 -0700)]
Merge tag 'drm-fixes-2023-07-21' of git://anongit.freedesktop.org/drm/drm

Pull drm fixes from Dave Airlie:
 "Mostly amdgpu fixes, a couple of i915 fixes, some nouveau and then a
  few misc accel and other fixes.

  client:
   - memory leak fix

  dma-buf:
   - memory leak fix

  qaic:
   - bound check fixes
   - map_user_pages leak
   - int overflow fixes

  habanalabs:
   - debugfs stub helper

  nouveau:
   - aux event slot fixes
   - anx9805 cards fixes

  i915:
   - Add sentinel to xehp_oa_b_counters
   - Revert "drm/i915: use localized __diag_ignore_all() instead of per
     file"

  amdgpu:
   - More PCIe DPM fixes for Intel platforms
   - DCN3.0.1 fixes
   - Virtual display timer fix
   - Async flip fix
   - SMU13 clock reporting fixes
   - Add missing PSP firmware declaration
   - DP MST fix
   - DCN3.1.x fixes
   - Slab out of bounds fix"

* tag 'drm-fixes-2023-07-21' of git://anongit.freedesktop.org/drm/drm: (31 commits)
  accel/habanalabs: add more debugfs stub helpers
  drm/nouveau/kms/nv50-: init hpd_irq_lock for PIOR DP
  drm/nouveau/disp: PIOR DP uses GPIO for HPD, not PMGR AUX interrupts
  drm/nouveau/i2c: fix number of aux event slots
  drm/amdgpu: use a macro to define no xcp partition case
  drm/amdgpu/vm: use the same xcp_id from root PD
  drm/amdgpu: fix slab-out-of-bounds issue in amdgpu_vm_pt_create
  drm/amdgpu: Allocate root PD on correct partition
  drm/amd/display: Keep PHY active for DP displays on DCN31
  drm/amd/display: Prevent vtotal from being set to 0
  drm/amd/display: Disable MPC split by default on special asic
  drm/amd/display: check TG is non-null before checking if enabled
  drm/amd/display: Add polling method to handle MST reply packet
  drm/amd/display: Clean up errors & warnings in amdgpu_dm.c
  drm/amdgpu: Allow the initramfs generator to include psp_13_0_6_ta
  drm/amdgpu/pm: make mclk consistent for smu 13.0.7
  drm/amdgpu/pm: make gfxclock consistent for sienna cichlid
  drm/amd/display: only accept async flips for fast updates
  drm/amdgpu/vkms: relax timer deactivation by hrtimer_try_to_cancel
  drm/amd/display: add DCN301 specific logic for OTG programming
  ...

15 months agoMerge tag 'amd-drm-fixes-6.5-2023-07-20' of https://gitlab.freedesktop.org/agd5f...
Dave Airlie [Fri, 21 Jul 2023 02:16:41 +0000 (12:16 +1000)]
Merge tag 'amd-drm-fixes-6.5-2023-07-20' of https://gitlab.freedesktop.org/agd5f/linux into drm-fixes

amd-drm-fixes-6.5-2023-07-20:

amdgpu:
- More PCIe DPM fixes for Intel platforms
- DCN3.0.1 fixes
- Virtual display timer fix
- Async flip fix
- SMU13 clock reporting fixes
- Add missing PSP firmware declaration
- DP MST fix
- DCN3.1.x fixes
- Slab out of bounds fix

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Alex Deucher <alexander.deucher@amd.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230720133456.7826-1-alexander.deucher@amd.com
15 months agoMerge tag 'drm-intel-fixes-2023-07-20' of git://anongit.freedesktop.org/drm/drm-intel...
Dave Airlie [Fri, 21 Jul 2023 02:15:09 +0000 (12:15 +1000)]
Merge tag 'drm-intel-fixes-2023-07-20' of git://anongit.freedesktop.org/drm/drm-intel into drm-fixes

- Add sentinel to xehp_oa_b_counters [perf] (Andrzej Hajda)
- Revert "drm/i915: use localized __diag_ignore_all() instead of per file" (Jani Nikula)

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Tvrtko Ursulin <tvrtko.ursulin@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/ZLjuwhLhwab5B7RY@tursulin-desk
15 months agoMerge tag 'drm-misc-fixes-2023-07-20' of git://anongit.freedesktop.org/drm/drm-misc...
Dave Airlie [Fri, 21 Jul 2023 02:02:31 +0000 (12:02 +1000)]
Merge tag 'drm-misc-fixes-2023-07-20' of git://anongit.freedesktop.org/drm/drm-misc into drm-fixes

Memory leak fixes in drm/client, memory access/leak fixes for
accel/qaic, another leak fix in dma-buf and three nouveau fixes around
hotplugging.

Signed-off-by: Dave Airlie <airlied@redhat.com>
From: Maxime Ripard <mripard@redhat.com>
Link: https://patchwork.freedesktop.org/patch/msgid/fmj5nok7zggux2lcpdtls2iknweba54wfc6o4zxq6i6s3dgi2r@7z3eawwhyhen
15 months agoMerge tag 'ata-6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal...
Linus Torvalds [Fri, 21 Jul 2023 02:10:50 +0000 (19:10 -0700)]
Merge tag 'ata-6.5-rc3' of git://git./linux/kernel/git/dlemoal/libata

Pull ata fix from Damien Le Moal:

 - Add missing MODULE_DESCRIPTION() in the many of the protocol modules
   for the pata_parport driver to avoid compilation warnings with "make
   W=1".

* tag 'ata-6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata:
  ata: pata_parport: Add missing protocol modules description

15 months agoMerge tag 'net-6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Linus Torvalds [Thu, 20 Jul 2023 21:46:39 +0000 (14:46 -0700)]
Merge tag 'net-6.5-rc3' of git://git./linux/kernel/git/netdev/net

Pull networking fixes from Jakub Kicinski:
 "Including fixes from BPF, netfilter, bluetooth and CAN.

  Current release - regressions:

   - eth: r8169: multiple fixes for PCIe ASPM-related problems

   - vrf: fix RCU lockdep splat in output path

  Previous releases - regressions:

   - gso: fall back to SW segmenting with GSO_UDP_L4 dodgy bit set

   - dsa: mv88e6xxx: do a final check before timing out when polling

   - nf_tables: fix sleep in atomic in nft_chain_validate

  Previous releases - always broken:

   - sched: fix undoing tcf_bind_filter() in multiple classifiers

   - bpf, arm64: fix BTI type used for freplace attached functions

   - can: gs_usb: fix time stamp counter initialization

   - nft_set_pipapo: fix improper element removal (leading to UAF)

  Misc:

   - net: support STP on bridge in non-root netns, STP prevents packet
     loops so not supporting it results in freezing systems of
     unsuspecting users, and in turn very upset noises being made

   - fix kdoc warnings

   - annotate various bits of TCP state to prevent data races"

* tag 'net-6.5-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (95 commits)
  net: phy: prevent stale pointer dereference in phy_init()
  tcp: annotate data-races around fastopenq.max_qlen
  tcp: annotate data-races around icsk->icsk_user_timeout
  tcp: annotate data-races around tp->notsent_lowat
  tcp: annotate data-races around rskq_defer_accept
  tcp: annotate data-races around tp->linger2
  tcp: annotate data-races around icsk->icsk_syn_retries
  tcp: annotate data-races around tp->keepalive_probes
  tcp: annotate data-races around tp->keepalive_intvl
  tcp: annotate data-races around tp->keepalive_time
  tcp: annotate data-races around tp->tsoffset
  tcp: annotate data-races around tp->tcp_tx_delay
  Bluetooth: MGMT: Use correct address for memcpy()
  Bluetooth: btusb: Fix bluetooth on Intel Macbook 2014
  Bluetooth: SCO: fix sco_conn related locking and validity issues
  Bluetooth: hci_conn: return ERR_PTR instead of NULL when there is no link
  Bluetooth: hci_sync: Avoid use-after-free in dbg for hci_remove_adv_monitor()
  Bluetooth: coredump: fix building with coredump disabled
  Bluetooth: ISO: fix iso_conn related locking and validity issues
  Bluetooth: hci_event: call disconnect callback before deleting conn
  ...

15 months agoblk-iocost: skip empty flush bio in iocost
Chengming Zhou [Thu, 20 Jul 2023 12:14:41 +0000 (20:14 +0800)]
blk-iocost: skip empty flush bio in iocost

The flush bio may have data, may have no data (empty flush), we couldn't
calculate cost for empty flush bio. So we'd better just skip it for now.

Another side effect is that empty flush bio's bio_end_sector() is 0, cause
iocg->cursor reset to 0, may break the cost calculation of other bios.

This isn't good enough, since flush bio still consume the device bandwidth,
but flush request is special, can be merged randomly in the flush state
machine, we don't know how to calculate cost for it for now.

Its completion time also has flaws, which may include the pre-flush or
post-flush completion time, but I don't know if we need to fix that and
how to fix it.

Signed-off-by: Chengming Zhou <zhouchengming@bytedance.com>
Acked-by: Tejun Heo <tj@kernel.org>
Link: https://lore.kernel.org/r/20230720121441.1408522-1-chengming.zhou@linux.dev
Signed-off-by: Jens Axboe <axboe@kernel.dk>