Heiko Carstens [Mon, 25 Oct 2010 14:10:54 +0000 (16:10 +0200)]
[S390] topology: export cpu topology via proc/sysinfo
Export the cpu configuration topology via sysinfo. Two new lines are
introduced:
CPU Topology HW: 0 0 0 4 6 4
CPU Topology SW: 0 0 0 0 4 24
The HW line describes the cpu topology nesting levels when the maximum
nesting level is used to get the corresponding SYSIB.
The SW line describes what Linux is actually using. In this case it
supports only two levels (CONFIG_SCHED_BOOK off) and therefore the
hardware folded the two lower levels in the SYSIB response block.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Heiko Carstens [Mon, 25 Oct 2010 14:10:53 +0000 (16:10 +0200)]
[S390] topology: move topology sysinfo code
Move the topology sysinfo SYSIB definitions to the proper place in
asm/sysinfo.h where they should be.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Heiko Carstens [Mon, 25 Oct 2010 14:10:52 +0000 (16:10 +0200)]
[S390] topology: clean up facility detection
Move cpu topology facility detection to early setup code where it
should be.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Martin Schwidefsky [Mon, 25 Oct 2010 14:10:51 +0000 (16:10 +0200)]
[S390] cleanup facility list handling
Store the facility list once at system startup with stfl/stfle and
reuse the result for all facility tests.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
FUJITA Tomonori [Mon, 25 Oct 2010 14:10:50 +0000 (16:10 +0200)]
[S390] enable ARCH_DMA_ADDR_T_64BIT with 64BIT
Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Stefan Haberland [Mon, 25 Oct 2010 14:10:49 +0000 (16:10 +0200)]
[S390] dasd: ignore unsolicited interrupts for DIAG
For the DASD DIAG discipline IO is started through special diagnose
calls. Unsolicited interrupts may contain information about the device
itself. But this information is not needed because the device is not
used directly.
Fix the case that an unimplemented dicipline function may be called
by ignoring unsolicited interrupts for the DIAG disciplin.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Christian Borntraeger [Mon, 25 Oct 2010 14:10:48 +0000 (16:10 +0200)]
[S390] kvm: Enable z196 instruction facilities
Enable PFPO, floating point extension, distinct-operands,
fast-BCR-serialization, high-word, interlocked-access, load/store-
on-condition, and population-count facilities for guests.
(bits 37, 44 and 45).
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Stefan Weinhuber [Mon, 25 Oct 2010 14:10:47 +0000 (16:10 +0200)]
[S390] dasd: fix unsolicited interrupt recognition
The dasd interrupt handler needs to distinguish solicited from
unsolicited interrupts, as unsolicited interrupts may require special
handling (e.g. summary unit checks) and solicited interrupts require
proper error recovery for the failed I/O request.
The interrupt handler needs to check several bit fields in the
interrupt response block (irb) to make this distinction.
So far our check of the status control bits has not been specific
enough, which may lead to a failed request getting just retried
instead of the necessary error recovery.
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Sebastian Ott [Mon, 25 Oct 2010 14:10:46 +0000 (16:10 +0200)]
[S390] dasd: fix use after free in dbf
Writing to /proc/dasd/statistics while the debug level of the
generic dasd debug entry is set to DBF_DEBUG will lead to an
use after free when accessing the debug entry later.
Since for the format string "%s" in the s390 dbf only a pointer
to the string is stored in the debug feature and the buffer used
here is freed afterwards.
To fix this just remove the debug message.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Christian Borntraeger [Mon, 25 Oct 2010 14:10:45 +0000 (16:10 +0200)]
[S390] kvm: Fix badness at include/asm/mmu_context.h:83
commit
050eef364ad700590a605a0749f825cab4834b1e
[S390] fix tlb flushing vs. concurrent /proc accesses
broke KVM on s390x. On every schedule a
Badness at include/asm/mmu_context.h:83 appears. s390_enable_sie
replaces the mm on the __running__ task, therefore, we have to
increase the attach count of the new mm.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Peter Oberparleiter [Mon, 25 Oct 2010 14:10:44 +0000 (16:10 +0200)]
[S390] cio: fix I/O cancel function
Function ccw_device_cancel_halt_clear may cause an unexpected kernel
panic if a clear function is currently active at the subchannel for
which it is called. In that case, the iretry counter used to determine
the number of retries is never initialized, leading to an immediate
failure of the function which results in a kernel panic.
Fix this by initializing the iretry counter when the function is
first called. Also replace the kernel panic with a return code: a
single malfunctioning I/O device should not automatically cause a
system-wide kernel panic.
Signed-off-by: Peter Oberparleiter <peter.oberparleiter@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Heiko Carstens [Mon, 25 Oct 2010 14:10:43 +0000 (16:10 +0200)]
[S390] topology: change default
Switch default value of the kernel parameter 'topology' from off to on.
Various performance measurements have finally shown that there are no
(known) regressions anywhere.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Heiko Carstens [Mon, 25 Oct 2010 14:10:42 +0000 (16:10 +0200)]
[S390] smp: use correct cpu address in print_cpu_info()
Up to now print_cpu_info() uses the cpu address stored in it's local
lowcore to print a message to the console. The cpu address in the
lowcore is (in this case) however not the physical cpu address of the
local cpu. It's the address of the cpu that issued the sigp restart
which started the local cpu.
Fix this by using the store cpu address instruction instead.
It's not that anybody really cares since this is broken since more than
ten years...
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Martin Schwidefsky [Mon, 25 Oct 2010 14:10:41 +0000 (16:10 +0200)]
[S390] remove ieee_instruction_pointer from thread_struct
The ieee_instruction_pointer can not be read from user space anymore
since git commit
613e1def6b52c399a8b72a5e11bc2e57d2546fb8, the ptrace
interface always returns zero. Remove it from the thread_struct. It
is still present in the user_regs_struct for compatability reasons.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Martin Schwidefsky [Mon, 25 Oct 2010 14:10:40 +0000 (16:10 +0200)]
[S390] cleanup system call parameter setup
Do the setup of the stack overflow argument for the sixth system
call parameter right before the branch to the system call function.
That simplifies the system call parameter access code.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Martin Schwidefsky [Mon, 25 Oct 2010 14:10:39 +0000 (16:10 +0200)]
[S390] correct alignment of cpuid structure
The store-cpu-id instruction has a minimum alignment of 8. Reflect
that in the definition of struct cpuid.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Martin Schwidefsky [Mon, 25 Oct 2010 14:10:38 +0000 (16:10 +0200)]
[S390] cleanup lowcore access from external interrupts
Read external interrupts parameters from the lowcore in the first
level interrupt handler in entry[64].S.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Martin Schwidefsky [Mon, 25 Oct 2010 14:10:37 +0000 (16:10 +0200)]
[S390] cleanup lowcore access from program checks
Read all required fields for program checks from the lowcore in the
first level interrupt handler in entry[64].S. If the context that
caused the fault was enabled for interrupts we can now re-enable the
irqs in entry[64].S.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Heiko Carstens [Mon, 25 Oct 2010 14:10:36 +0000 (16:10 +0200)]
[S390] pgtable: move pte_mkhuge() from hugetlb.h to pgtable.h
All architectures besides s390 have pte_mkhuge() defined in pgtable.h.
So move the function to pgtable.h on s390 as well.
Fixes a compile error introduced with "hugetlb: hugepage migration core"
in linux-next which only happens on s390.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Martin Schwidefsky [Mon, 25 Oct 2010 14:10:35 +0000 (16:10 +0200)]
[S390] fix SIGBUS handling
Raise SIGBUS with a siginfo structure. Deliver BUS_ADRERR as si_code and
the address of the fault in the si_addr field.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Sebastian Ott [Mon, 25 Oct 2010 14:10:34 +0000 (16:10 +0200)]
[S390] cio: notify drivers of channel path events
This patch adds a notification mechanism to inform ccw drivers
about changes to channel paths, which occured while the device
is online.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Sebastian Ott [Mon, 25 Oct 2010 14:10:33 +0000 (16:10 +0200)]
[S390] css: update subchannel description after hibernate
Update the subchannel descriptor while resuming from hibernate
in order to obtain current link addresses.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Sebastian Ott [Mon, 25 Oct 2010 14:10:32 +0000 (16:10 +0200)]
[S390] css: update descriptor after hibernate
Update the channel path descriptors after hibernation.
This is done unlocked, since we are the only active
task at this time.
Note: chsc_determine_base_channel_path_desc is changed
to use spin_lock_irqsave, since it's called with
interrupts disabled in this case.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Sebastian Ott [Mon, 25 Oct 2010 14:10:31 +0000 (16:10 +0200)]
[S390] cio: update descriptor in chsc_chp_vary
Update the channel path descriptor at the beginning of to the
vary_on operation.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Sebastian Ott [Mon, 25 Oct 2010 14:10:30 +0000 (16:10 +0200)]
[S390] chsc: use the global page to determine the chp desriptor
chsc_determine_channel_path_desc is called by a wrapper
who allocates a response struct. The response data
is then memcpy'ed to this response struct by
chsc_determine_channel_path_desc.
Change chsc_determine_base_channel_path_desc to use the
global chsc_page and deliver it to the function doing
the actual chsc call. The channel path desriptor is
then directly read from the response data.
As a result we get rid of the additional allocation
for the response struct.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Sebastian Ott [Mon, 25 Oct 2010 14:10:29 +0000 (16:10 +0200)]
[S390] chsc: consolidate memory allocations
Most wrappers around the channel subsystem call have their own logic
to allocate memory (with proper alignment) or use preallocated or
static memory. This patch converts most users of the channel
subsystem call to use the same preallocated page (proteced by a
spinlock).
Note: The sei_page which is used in our crw handler to call
"store event information" has to coexist, since
a) in crw context, while accessing the sei_page, sleeping is allowed
(which will conflict with the spinlock protection of the chsc_page)
b) in crw context, while accessing the sei_page, channel subsystem
calls are allowed (which itself would require the page).
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Sebastian Ott [Mon, 25 Oct 2010 14:10:28 +0000 (16:10 +0200)]
[S390] chsc: initialization fixes
This patch fixes:
* kfree vs. free_page usage
* structure definition for determine_css_characteristics
* naming convention for the chsc init function
* deregistration of crw handlers in the cleanup path
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Sebastian Ott [Mon, 25 Oct 2010 14:10:27 +0000 (16:10 +0200)]
[S390] cio: add lock to struct channel_path
Serialize access to members of struct channel_path with a mutex.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Sebastian Ott [Mon, 25 Oct 2010 14:10:26 +0000 (16:10 +0200)]
[S390] cio: fix memleak in resume path
If a ccwdevice is lost during hibernation and a different
ccwdevice is attached to the same subchannel, we will
deregister the old ccw device and register the new one.
Since deregistration is not allowed in this context, we
handle this action later. However, some parts of the
registration process for the new device were started anyway,
so that the old device structure is no longer accessible.
Fix this by deferring both actions to the afterwards
scheduled subchannel event.
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Andy Shevchenko [Mon, 25 Oct 2010 14:10:25 +0000 (16:10 +0200)]
[S390] cio: remove custom implementation of hex_to_bin()
Signed-off-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Stefan Haberland [Mon, 25 Oct 2010 14:10:24 +0000 (16:10 +0200)]
[S390] dasd fix dump_sense_dbf
The dasd_eckd_dump_sense_dbf function uses a macro for s390 debug
feature that can handle up to 8 parameters (for the DASD device
driver).
Fix the function to use only the maximum number of parameters.
Signed-off-by: Stefan Haberland <stefan.haberland@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Sebastian Ott [Mon, 25 Oct 2010 14:10:23 +0000 (16:10 +0200)]
[S390] css: fix sparse warning
fix this sparse warning:
drivers/s390/cio/css.c:580:6: warning: symbol 'css_schedule_eval_all_unreg'
was not declared. Should it be static?
Signed-off-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Hendrik Brueckner [Mon, 25 Oct 2010 14:10:22 +0000 (16:10 +0200)]
[S390] hvc_iucv: do not call iucv_unregister if iucv_register failed
If the iucv_register() functions fails, the error recovery calls
iucv_unregister() which might cause the following stack backtrace:
(<
0000000000100ab2> show_trace+0xee/0x144)
<
00000000004f1842> panic+0xb6/0x248
<
00000000001010a6> die+0x15a/0x16c
<
000000000011d936> do_no_context+0xa6/0xe4
<
00000000004f84dc> do_protection_exception+0x2e8/0x3a4
<
0000000000113afc> pgm_exit+0x0/0x14
<
00000000004e786e> iucv_unregister+0x5a/0x17c
(<
00000000004e785e> iucv_unregister+0x4a/0x17c)
<
000000000076de74> hvc_iucv_init+0x228/0x5dc
<
00000000001000c2> do_one_initcall+0x3e/0x19c
<
00000000007524a2> kernel_init+0x28e/0x404
<
0000000000105dd6> kernel_thread_starter+0x6/0xc
<
0000000000105dd0> kernel_thread_starter+0x0/0xc
Remove the call to iucv_unregister() and remove the goto label
as unregistering is the last step in the hvc_iucv initialization.
If iucv_register() fails, simply clean up hvc terminals and free
resources.
Signed-off-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Heiko Carstens [Mon, 25 Oct 2010 14:10:21 +0000 (16:10 +0200)]
[S390] cmm: fix crash on case conversion
When the cmm module is compiled into the kernel it will crash when
writing to the R/O data section.
Reason is the lower to upper case conversion of the "sender" module
parameter which ignored the fact that the pointer is preinitialized.
Introduced with
41b42876 "cmm, smsgiucv_app: convert sender to
uppercase"
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Joe Perches [Mon, 25 Oct 2010 14:10:20 +0000 (16:10 +0200)]
[S390] drivers/s390/char: Use static const char arrays
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Heiko Carstens [Mon, 25 Oct 2010 14:10:19 +0000 (16:10 +0200)]
[S390] switch_to: get rid of prev == next check
schedule() makes sure that prev != next before calling switch_to().
Therefore remove the redundant check.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Heiko Carstens [Mon, 25 Oct 2010 14:10:18 +0000 (16:10 +0200)]
[S390] switch_to: dont restore/save access & fpu regs for kernel threads
If the previous task was a kernel thread there is no need to save the
contents of the fpu and access registers since they aren't used in
kernel mode.
For the same reason it is not necessary to restore these registers if
the next task is a kernel thread.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Heiko Carstens [Mon, 25 Oct 2010 14:10:17 +0000 (16:10 +0200)]
[S390] Add config option for z196 code generation.
Add a kernel config option for the IBM zEnterprise 196. This will
produce faster code on newer compilers using the -march=z196 option.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Heiko Carstens [Mon, 25 Oct 2010 14:10:16 +0000 (16:10 +0200)]
[S390] sysinfo: display capacity adjustment indicator
Display machine capacity adjustment indicator and capacity
change reason if available in /proc/sysinfo.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Martin Schwidefsky [Mon, 25 Oct 2010 14:10:15 +0000 (16:10 +0200)]
[S390] add z196 instructions to kernel disassembler
Add the new instructions introduced with z196 to the kernel disassembler.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Martin Schwidefsky [Mon, 25 Oct 2010 14:10:14 +0000 (16:10 +0200)]
[S390] add support for nonquiescing sske
Improve performance of the sske operation by using the nonquiescing
variant if the affected page has no mappings established. On machines
with no support for the new sske variant the mask bit will be ignored.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Martin Schwidefsky [Mon, 25 Oct 2010 14:10:13 +0000 (16:10 +0200)]
[S390] store indication fault optimization
Use the store indication bit in the translation exception code on
page faults to avoid the protection faults that immediatly follow
the page fault if the access has been a write.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Heiko Carstens [Mon, 25 Oct 2010 14:10:12 +0000 (16:10 +0200)]
[S390] cpu hotplug/idle: move cpu_die call to enabled context
There is no difference if cpu_die is called from enabled or disabled
context. Except that the fast_gup code might be called via
cpu_die -> idle_task_exit -> __mm_drop -> crst_table_free. Which in
turn grabs and releases a spinlock using the _bh ops, which is not
allowed in irq disabled context, since spin_unlock_bh will
unconditionally enable interrupts again.
To get rid of the warning emitted by the softirq code just move the
code to enabled context.
In this case this doesn't fix a bug, we just get rid of a warning.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Martin Schwidefsky [Mon, 25 Oct 2010 14:10:11 +0000 (16:10 +0200)]
[S390] lockless get_user_pages_fast()
Implement get_user_pages_fast without locking in the fastpath on s390.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Christof Schmitt [Mon, 25 Oct 2010 14:10:10 +0000 (16:10 +0200)]
[S390] set ARCH_HAS_SG_CHAIN for s390
Set ARCH_HAS_SG_CHAIN for scatter lists on s390. Without this flag the
SCSI code limits the maximum number of segments, so set it to make
proper use of the FCP channel hardware.
Signed-off-by: Christof Schmitt <christof.schmitt@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Heiko Carstens [Mon, 25 Oct 2010 14:10:09 +0000 (16:10 +0200)]
[S390] standardize Kbuild rules
Introducing this Kbuild file allow us to:
make arch/s390/
And thus building all the core part of s390.
Same as on other architectures.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Stefan Weinhuber [Mon, 25 Oct 2010 14:10:08 +0000 (16:10 +0200)]
[S390] dasd: let recovery cqr inherit flags from failed cqr
The usual way to recover a failed DASD ECKD request (cqr) is to create
a new request with an appropriate recovery CCW program. Certain
features, e.g. failfast, can be enabled per request and are stored in
the requests flags. These flags have to be copied from the failed to
the recovery request, to let the recovery request use the same
features as the original one.
Signed-off-by: Stefan Weinhuber <wein@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Martin Schwidefsky [Mon, 25 Oct 2010 14:10:07 +0000 (16:10 +0200)]
[S390] zero page cache synonyms
If the zero page is mapped to virtual user space addresses that differ
only in bit 2^12 or 2^13 we get L1 cache synonyms which can affect
performance. Follow the mips model and use multiple zero pages to avoid
the synonyms.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Linus Torvalds [Sun, 24 Oct 2010 20:41:39 +0000 (13:41 -0700)]
Merge branch 'for-next' of git://git./linux/kernel/git/jikos/trivial
* 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (39 commits)
Update broken web addresses in arch directory.
Update broken web addresses in the kernel.
Revert "drivers/usb: Remove unnecessary return's from void functions" for musb gadget
Revert "Fix typo: configuation => configuration" partially
ida: document IDA_BITMAP_LONGS calculation
ext2: fix a typo on comment in ext2/inode.c
drivers/scsi: Remove unnecessary casts of private_data
drivers/s390: Remove unnecessary casts of private_data
net/sunrpc/rpc_pipe.c: Remove unnecessary casts of private_data
drivers/infiniband: Remove unnecessary casts of private_data
drivers/gpu/drm: Remove unnecessary casts of private_data
kernel/pm_qos_params.c: Remove unnecessary casts of private_data
fs/ecryptfs: Remove unnecessary casts of private_data
fs/seq_file.c: Remove unnecessary casts of private_data
arm: uengine.c: remove C99 comments
arm: scoop.c: remove C99 comments
Fix typo configue => configure in comments
Fix typo: configuation => configuration
Fix typo interrest[ing|ed] => interest[ing|ed]
Fix various typos of valid in comments
...
Fix up trivial conflicts in:
drivers/char/ipmi/ipmi_si_intf.c
drivers/usb/gadget/rndis.c
net/irda/irnet/irnet_ppp.c
Linus Torvalds [Sun, 24 Oct 2010 20:06:57 +0000 (13:06 -0700)]
Merge branch 'devel' of git://git./linux/kernel/git/mchehab/edac
* 'devel' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/edac: (25 commits)
i7300_edac: Properly initialize per-csrow memory size
V4L/DVB: i7300_edac: better initialize page counts
MAINTAINERS: Add maintainer for i7300-edac driver
i7300-edac: CodingStyle cleanup
i7300_edac: Improve comments
i7300_edac: Cleanup: reorganize the file contents
i7300_edac: Properly detect channel on CE errors
i7300_edac: enrich FBD error info for corrected errors
i7300_edac: enrich FBD error info for fatal errors
i7300_edac: pre-allocate a buffer used to prepare err messages
i7300_edac: Fix MTR x4/x8 detection logic
i7300_edac: Make the debug messages coherent with the others
i7300_edac: Cleanup: remove get_error_info logic
i7300_edac: Add a code to cleanup error registers
i7300_edac: Add support for reporting FBD errors
i7300_edac: Properly detect the type of error correction
i7300_edac: Detect if the device is on single mode
i7300_edac: Adds detection for enhanced scrub mode on x8
i7300_edac: Clear the error bit after reading
i7300_edac: Add error detection code for global errors
...
Linus Torvalds [Sun, 24 Oct 2010 19:47:55 +0000 (12:47 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/penberg/slab-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/penberg/slab-2.6: (27 commits)
SLUB: Fix memory hotplug with !NUMA
slub: Move functions to reduce #ifdefs
slub: Enable sysfs support for !CONFIG_SLUB_DEBUG
SLUB: Optimize slab_free() debug check
slub: Move NUMA-related functions under CONFIG_NUMA
slub: Add lock release annotation
slub: Fix signedness warnings
slub: extract common code to remove objects from partial list without locking
SLUB: Pass active and inactive redzone flags instead of boolean to debug functions
slub: reduce differences between SMP and NUMA
Revert "Slub: UP bandaid"
percpu: clear memory allocated with the km allocator
percpu: use percpu allocator on UP too
percpu: reduce PCPU_MIN_UNIT_SIZE to 32k
vmalloc: pcpu_get/free_vm_areas() aren't needed on UP
SLUB: Fix merged slab cache names
Slub: UP bandaid
slub: fix SLUB_RESILIENCY_TEST for dynamic kmalloc caches
slub: Fix up missing kmalloc_cache -> kmem_cache_node case for memoryhotplug
slub: Add dummy functions for the !SLUB_DEBUG case
...
Linus Torvalds [Sun, 24 Oct 2010 19:47:25 +0000 (12:47 -0700)]
Merge branch 'kvm-updates/2.6.37' of git://git./virt/kvm/kvm
* 'kvm-updates/2.6.37' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (321 commits)
KVM: Drop CONFIG_DMAR dependency around kvm_iommu_map_pages
KVM: Fix signature of kvm_iommu_map_pages stub
KVM: MCE: Send SRAR SIGBUS directly
KVM: MCE: Add MCG_SER_P into KVM_MCE_CAP_SUPPORTED
KVM: fix typo in copyright notice
KVM: Disable interrupts around get_kernel_ns()
KVM: MMU: Avoid sign extension in mmu_alloc_direct_roots() pae root address
KVM: MMU: move access code parsing to FNAME(walk_addr) function
KVM: MMU: audit: check whether have unsync sps after root sync
KVM: MMU: audit: introduce audit_printk to cleanup audit code
KVM: MMU: audit: unregister audit tracepoints before module unloaded
KVM: MMU: audit: fix vcpu's spte walking
KVM: MMU: set access bit for direct mapping
KVM: MMU: cleanup for error mask set while walk guest page table
KVM: MMU: update 'root_hpa' out of loop in PAE shadow path
KVM: x86 emulator: Eliminate compilation warning in x86_decode_insn()
KVM: x86: Fix constant type in kvm_get_time_scale
KVM: VMX: Add AX to list of registers clobbered by guest switch
KVM guest: Move a printk that's using the clock before it's ready
KVM: x86: TSC catchup mode
...
Linus Torvalds [Sun, 24 Oct 2010 19:46:24 +0000 (12:46 -0700)]
Merge branch 'i2c-for-linus' of git://git./linux/kernel/git/jdelvare/staging
* 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging:
i2c-viapro: Don't log nacks
i2c/pca954x: Remove __devinit and __devexit from probe and remove functions
MAINTAINERS: Add maintainer for PCA9541 I2C bus master selector driver
i2c/mux: Driver for PCA9541 I2C Master Selector
i2c: Optimize function i2c_detect()
i2c: Discard warning message on device instantiation from user-space
i2c-amd8111: Add proper error handling
i2c: Change to new flag variable
i2c: Remove unneeded inclusions of <linux/i2c-id.h>
i2c: Let i2c_parent_is_i2c_adapter return the parent adapter
i2c: Simplify i2c_parent_is_i2c_adapter
i2c-pca-platform: Change device name of request_irq
i2c: Fix Kconfig dependencies
Linus Torvalds [Sun, 24 Oct 2010 19:44:59 +0000 (12:44 -0700)]
Merge branch 'for-linus' of git://git./linux/kernel/git/jikos/hid
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/hid: (47 commits)
HID: fix mismerge in hid-lg
HID: hidraw: fix window in hidraw_release
HID: hid-sony: override usbhid_output_raw_report for Sixaxis
HID: add absolute axis resolution calculation
HID: force feedback support for Logitech RumblePad gamepad
HID: support STmicroelectronics and Sitronix with hid-stantuml driver
HID: magicmouse: Adjust major / minor axes to scale
HID: Fix for problems with eGalax/DWAV multi-touch-screen
HID: waltop: add support for Waltop Slim Tablet 12.1 inch
HID: add NOGET quirk for AXIS 295 Video Surveillance Joystick
HID: usbhid: remove unused hiddev_driver
HID: magicmouse: Use hid-input parsing rather than bypassing it
HID: trivial formatting fix
HID: Add support for Logitech Speed Force Wireless gaming wheel
HID: don't Send Feature Reports on Interrupt Endpoint
HID: 3m: Adjust major / minor axes to scale
HID: 3m: Correct touchscreen emulation
HID: 3m: Convert to MT slots
HID: 3m: Output proper orientation range
HID: 3m: Adjust to sequential MT HID protocol
...
Linus Torvalds [Sun, 24 Oct 2010 19:44:34 +0000 (12:44 -0700)]
Merge git://git./linux/kernel/git/herbert/crypto-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
crypto: Makefile - replace the use of <module>-objs with <module>-y
crypto: hifn_795x - use cancel_delayed_work_sync()
crypto: talitos - sparse check endian fixes
crypto: talitos - fix checkpatch warning
crypto: talitos - fix warning: 'alg' may be used uninitialized in this function
crypto: cryptd - Adding the AEAD interface type support to cryptd
crypto: n2_crypto - Niagara2 driver needs to depend upon CRYPTO_DES
crypto: Kconfig - update broken web addresses
crypto: omap-sham - Adjust DMA parameters
crypto: fips - FIPS requires algorithm self-tests
crypto: omap-aes - OMAP2/3 AES hw accelerator driver
crypto: updates to enable omap aes
padata: add missing __percpu markup in include/linux/padata.h
MAINTAINERS: Add maintainer entries for padata/pcrypt
Pekka Enberg [Sun, 24 Oct 2010 16:57:05 +0000 (19:57 +0300)]
Merge branch 'master' into for-linus
Conflicts:
include/linux/percpu.h
mm/percpu.c
Jean Delvare [Sun, 24 Oct 2010 16:16:59 +0000 (18:16 +0200)]
i2c-viapro: Don't log nacks
Transactions not acked can happen every now and then, in particular
during device detection, and various transaction types can be used for
this purpose. So stop logging this event, except when debugging is
enabled. This is what other similar drivers (e.g. i2c-i801 or
i2c-piix4) do.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Guenter Roeck [Sun, 24 Oct 2010 16:16:59 +0000 (18:16 +0200)]
i2c/pca954x: Remove __devinit and __devexit from probe and remove functions
The underlying I2C adapter may or may not be present when this driver
gets initialized, and may disappear later, so there is no safe time at
which the probe and remove functions can be discarded.
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Guenter Roeck [Sun, 24 Oct 2010 16:16:59 +0000 (18:16 +0200)]
MAINTAINERS: Add maintainer for PCA9541 I2C bus master selector driver
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Guenter Roeck [Sun, 24 Oct 2010 16:16:58 +0000 (18:16 +0200)]
i2c/mux: Driver for PCA9541 I2C Master Selector
This patch adds support for PCA9541, an I2C Bus Master Selector.
The driver is modeled as single channel I2C Multiplexer to be able to utilize
the I2C multiplexer framework.
Signed-off-by: Guenter Roeck <guenter.roeck@ericsson.com>
Reviewed-by: Tom Grennan <tom.grennan@ericsson.com>
Acked-by: Jean Delvare <khali@linux-fr.org>
Jean Delvare [Sun, 24 Oct 2010 16:16:58 +0000 (18:16 +0200)]
i2c: Optimize function i2c_detect()
Check the class flags before allocating the temporary i2c_client
structure, to avoid allocating it when we don't need it.
Also optimize the inner loop a bit.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Jean Delvare [Sun, 24 Oct 2010 16:16:58 +0000 (18:16 +0200)]
i2c: Discard warning message on device instantiation from user-space
The "new_device" sysfs interface has been there for quite some time
now, nobody complained about it so it must be good enough. Time to
remove the warning and call it stable.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Michael Lawnick <ml.lawnick@gmx.de>
Julia Lawall [Sun, 24 Oct 2010 16:16:58 +0000 (18:16 +0200)]
i2c-amd8111: Add proper error handling
The functions the functions amd_ec_wait_write and amd_ec_wait_read have an
unsigned return type, but return a negative constant to indicate an error
condition.
A sematic match that finds this problem is as follows:
(http://coccinelle.lip6.fr/)
// <smpl>
@exists@
identifier f;
constant C;
@@
unsigned f(...)
{ <+...
* return -C;
...+> }
// </smpl>
Fixing amd_ec_wait_write and amd_ec_wait_read leads to the need to adjust
the return type of the functions amd_ec_write and amd_ec_read, which are
the only functions that call amd_ec_wait_write and amd_ec_wait_read.
amd_ec_write and amd_ec_read, in turn, are only called from within the
function amd8111_access, which already returns a signed typed value. Each
of the calls to amd_ec_write and amd_ec_read are updated using the
following semantic patch:
// <smpl>
@@
@@
+ status = amd_ec_write
- amd_ec_write
(...);
+ if (status) return status;
@@
@@
+ status = amd_ec_read
- amd_ec_read
(...);
+ if (status) return status;
// </smpl>
The patch also adds the declaration of the status variable.
Signed-off-by: Julia Lawall <julia@diku.dk>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
matt mooney [Sun, 24 Oct 2010 16:16:58 +0000 (18:16 +0200)]
i2c: Change to new flag variable
Replace EXTRA_CFLAGS with ccflags-y.
Signed-off-by: matt mooney <mfm@muteddisk.com>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Jean Delvare [Sun, 24 Oct 2010 16:16:58 +0000 (18:16 +0200)]
i2c: Remove unneeded inclusions of <linux/i2c-id.h>
These drivers don't use anything which is defined in <linux/i2c-id.h>.
This header file was never meant to be included directly anyway, and
will be deleted soon.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Ben Dooks <ben-linux@fluff.org>
Acked-by: Dave Airlie <airlied@linux.ie>
Cc: Hans Verkuil <hverkuil@xs4all.nl>
Jean Delvare [Sun, 24 Oct 2010 16:16:57 +0000 (18:16 +0200)]
i2c: Let i2c_parent_is_i2c_adapter return the parent adapter
This makes the calling site's code clearer IMHO.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Michael Lawnick <ml.lawnick@gmx.de>
Jean Delvare [Sun, 24 Oct 2010 16:16:57 +0000 (18:16 +0200)]
i2c: Simplify i2c_parent_is_i2c_adapter
Only i2c devices can have their type set to i2c_adapter_type, so
testing the bus type is redundant.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Cc: Michael Lawnick <ml.lawnick@gmx.de>
Nobuhiro Iwamatsu [Sun, 24 Oct 2010 16:16:57 +0000 (18:16 +0200)]
i2c-pca-platform: Change device name of request_irq
i2c->adap.name shouldn't be used in request_irq.
Instead the driver name "i2c-pca-platform" should be used.
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Acked-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: stable@kernel.org
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Jean Delvare [Sun, 24 Oct 2010 16:16:57 +0000 (18:16 +0200)]
i2c: Fix Kconfig dependencies
drivers/i2c/algos/Kconfig makes all the algorithms dependent on
!I2C_HELPER_AUTO, which triggers a Kconfig warning about broken
dependencies when some driver selects one of the algorithms. Ideally
we would make only the prompts dependent on !I2C_HELPER_AUTO, however
Kconfig doesn't currently support that. So we have to redefine the
symbols separately for the I2C_HELPER_AUTO=y case.
Signed-off-by: Jean Delvare <khali@linux-fr.org>
Acked-by: Michal Marek <mmarek@suse.cz>
Jan Kiszka [Mon, 18 Oct 2010 13:38:40 +0000 (15:38 +0200)]
KVM: Drop CONFIG_DMAR dependency around kvm_iommu_map_pages
We also have to call kvm_iommu_map_pages for CONFIG_AMD_IOMMU. So drop
the dependency on Intel IOMMU, kvm_iommu_map_pages will be a nop anyway
if CONFIG_IOMMU_API is not defined.
KVM-Stable-Tag.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Jan Kiszka [Thu, 14 Oct 2010 11:59:04 +0000 (13:59 +0200)]
KVM: Fix signature of kvm_iommu_map_pages stub
Breaks otherwise if CONFIG_IOMMU_API is not set.
KVM-Stable-Tag.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Huang Ying [Fri, 8 Oct 2010 08:24:15 +0000 (16:24 +0800)]
KVM: MCE: Send SRAR SIGBUS directly
Originally, SRAR SIGBUS is sent to QEMU-KVM via touching the poisoned
page. But commit
96054569190bdec375fe824e48ca1f4e3b53dd36 prevents the
signal from being sent. So now the signal is sent via
force_sig_info_fault directly.
[marcelo: use send_sig_info instead]
Reported-by: Dean Nelson <dnelson@redhat.com>
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Huang Ying [Fri, 8 Oct 2010 08:24:14 +0000 (16:24 +0800)]
KVM: MCE: Add MCG_SER_P into KVM_MCE_CAP_SUPPORTED
Now we have MCG_SER_P (and corresponding SRAO/SRAR MCE) support in
kernel and QEMU-KVM, the MCG_SER_P should be added into
KVM_MCE_CAP_SUPPORTED to make all these code really works.
Reported-by: Dean Nelson <dnelson@redhat.com>
Signed-off-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Nicolas Kaiser [Wed, 6 Oct 2010 12:23:22 +0000 (14:23 +0200)]
KVM: fix typo in copyright notice
Fix typo in copyright notice.
Signed-off-by: Nicolas Kaiser <nikai@nikai.net>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Mon, 4 Oct 2010 10:55:49 +0000 (12:55 +0200)]
KVM: Disable interrupts around get_kernel_ns()
get_kernel_ns() wants preemption disabled. It doesn't make a lot of sense
during the get/set ioctls (no way to make them non-racy) but the callee wants
it.
Signed-off-by: Avi Kivity <avi@redhat.com>
Avi Kivity [Sun, 3 Oct 2010 16:51:39 +0000 (18:51 +0200)]
KVM: MMU: Avoid sign extension in mmu_alloc_direct_roots() pae root address
Signed-off-by: Avi Kivity <avi@redhat.com>
Xiao Guangrong [Tue, 28 Sep 2010 09:03:14 +0000 (17:03 +0800)]
KVM: MMU: move access code parsing to FNAME(walk_addr) function
Move access code parsing from caller site to FNAME(walk_addr) function
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Xiao Guangrong [Mon, 27 Sep 2010 10:09:29 +0000 (18:09 +0800)]
KVM: MMU: audit: check whether have unsync sps after root sync
After root synced, all unsync sps are synced, this patch add a check to make
sure it's no unsync sps in VCPU's page table
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Xiao Guangrong [Mon, 27 Sep 2010 10:07:59 +0000 (18:07 +0800)]
KVM: MMU: audit: introduce audit_printk to cleanup audit code
Introduce audit_printk, and record audit point instead audit name
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Xiao Guangrong [Mon, 27 Sep 2010 10:07:07 +0000 (18:07 +0800)]
KVM: MMU: audit: unregister audit tracepoints before module unloaded
fix:
Call Trace:
[<
ffffffffa01e46ba>] ? kvm_mmu_pte_write+0x229/0x911 [kvm]
[<
ffffffffa01c6ba9>] ? gfn_to_memslot+0x39/0xa0 [kvm]
[<
ffffffffa01c6c26>] ? mark_page_dirty+0x16/0x2e [kvm]
[<
ffffffffa01c6d6f>] ? kvm_write_guest_page+0x67/0x7f [kvm]
[<
ffffffff81066fbd>] ? local_clock+0x2a/0x3b
[<
ffffffffa01d52ce>] emulator_write_phys+0x46/0x54 [kvm]
......
Code: Bad RIP value.
RIP [<
ffffffffa0172056>] 0xffffffffa0172056
RSP <
ffff880134f69a70>
CR2:
ffffffffa0172056
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Xiao Guangrong [Mon, 27 Sep 2010 10:06:16 +0000 (18:06 +0800)]
KVM: MMU: audit: fix vcpu's spte walking
After nested nested paging, it may using long mode to shadow 32/PAE paging
guest, so this patch fix it
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Xiao Guangrong [Mon, 27 Sep 2010 10:05:00 +0000 (18:05 +0800)]
KVM: MMU: set access bit for direct mapping
Set access bit while setup up direct page table if it's nonpaing or npt enabled,
it's good for CPU's speculate access
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Xiao Guangrong [Mon, 27 Sep 2010 10:03:27 +0000 (18:03 +0800)]
KVM: MMU: cleanup for error mask set while walk guest page table
Small cleanup for set page fault error code
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Xiao Guangrong [Mon, 27 Sep 2010 10:02:12 +0000 (18:02 +0800)]
KVM: MMU: update 'root_hpa' out of loop in PAE shadow path
The value of 'vcpu->arch.mmu.pae_root' is not modified, so we can update
'root_hpa' out of the loop.
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Sheng Yang [Tue, 28 Sep 2010 08:33:32 +0000 (16:33 +0800)]
KVM: x86 emulator: Eliminate compilation warning in x86_decode_insn()
Eliminate:
arch/x86/kvm/emulate.c:801: warning: ‘sv’ may be used uninitialized in this
function
on gcc 4.1.2
Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Jan Kiszka [Sun, 26 Sep 2010 11:00:53 +0000 (13:00 +0200)]
KVM: x86: Fix constant type in kvm_get_time_scale
Older gcc versions complain about the improper type (for x86-32), 4.5
seems to fix this silently. However, we should better use the right type
initially.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Jan Kiszka [Tue, 28 Sep 2010 14:37:42 +0000 (16:37 +0200)]
KVM: VMX: Add AX to list of registers clobbered by guest switch
By chance this caused no harm so far. We overwrite AX during switch
to/from guest context, so we must declare this.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Arjan Koers [Mon, 2 Aug 2010 21:35:28 +0000 (23:35 +0200)]
KVM guest: Move a printk that's using the clock before it's ready
Fix a hang during SMP kernel boot on KVM that showed up
after commit
489fb490dbf8dab0249ad82b56688ae3842a79e8
(2.6.35) and
59aab522154a2f17b25335b63c1cf68a51fb6ae0
(2.6.34.1). The problem only occurs when
CONFIG_PRINTK_TIME is set.
KVM-Stable-Tag.
Signed-off-by: Arjan Koers <0h61vkll2ly8@xutrox.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Zachary Amsden [Sun, 19 Sep 2010 00:38:15 +0000 (14:38 -1000)]
KVM: x86: TSC catchup mode
Negate the effects of AN TYM spell while kvm thread is preempted by tracking
conversion factor to the highest TSC rate and catching the TSC up when it has
fallen behind the kernel view of time. Note that once triggered, we don't
turn off catchup mode.
A slightly more clever version of this is possible, which only does catchup
when TSC rate drops, and which specifically targets only CPUs with broken
TSC, but since these all are considered unstable_tsc(), this patch covers
all necessary cases.
Signed-off-by: Zachary Amsden <zamsden@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Zachary Amsden [Sun, 19 Sep 2010 00:38:14 +0000 (14:38 -1000)]
KVM: x86: Rename timer function
This just changes some names to better reflect the usage they
will be given. Separated out to keep confusion to a minimum.
Signed-off-by: Zachary Amsden <zamsden@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Zachary Amsden [Sun, 19 Sep 2010 00:38:13 +0000 (14:38 -1000)]
KVM: x86: Make math work for other scales
The math in kvm_get_time_scale relies on the fact that
NSEC_PER_SEC < 2^32. To use the same function to compute
arbitrary time scales, we must extend the first reduction
step to shrink the base rate to a 32-bit value, and
possibly reduce the scaled rate into a 32-bit as well.
Note we must take care to avoid an arithmetic overflow
when scaling up the tps32 value (this could not happen
with the fixed scaled value of NSEC_PER_SEC, but can
happen with scaled rates above 2^31.
Signed-off-by: Zachary Amsden <zamsden@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Tue, 21 Sep 2010 17:59:44 +0000 (19:59 +0200)]
KVM: cpu_relax() during spin waiting for reboot
It doesn't really matter, but if we spin, we should spin in a more relaxed
manner. This way, if something goes wrong at least it won't contribute to
global warming.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Avi Kivity [Sun, 19 Sep 2010 12:34:08 +0000 (14:34 +0200)]
KVM: VMX: Respect interrupt window in big real mode
If an interrupt is pending, we need to stop emulation so we
can inject it.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Mohammed Gamal [Sun, 19 Sep 2010 12:34:07 +0000 (14:34 +0200)]
KVM: VMX: Emulated real mode interrupt injection
Replace the inject-as-software-interrupt hack we currently have with
emulated injection.
Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Mohammed Gamal [Sun, 19 Sep 2010 12:34:06 +0000 (14:34 +0200)]
KVM: Add kvm_inject_realmode_interrupt() wrapper
This adds a wrapper function kvm_inject_realmode_interrupt() around the
emulator function emulate_int_real() to allow real mode interrupt injection.
[avi: initialize operand and address sizes before emulating interrupts]
[avi: initialize rip for real mode interrupt injection]
[avi: clear interrupt pending flag after emulating interrupt injection]
Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Mohammed Gamal [Sun, 19 Sep 2010 12:34:05 +0000 (14:34 +0200)]
KVM: x86 emulator: Expose emulate_int_real()
Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Hillf Danton [Sat, 18 Sep 2010 00:41:02 +0000 (08:41 +0800)]
KVM: MMU: fix counting of rmap entries in rmap_add()
It seems that rmap entries are under counted.
Signed-off-by: Hillf Danton <dhillf@gmail.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Xiao Guangrong [Mon, 20 Sep 2010 14:17:48 +0000 (22:17 +0800)]
KVM: document 'kvm.mmu_audit' parameter
Document this parameter into Documentation/kernel-parameters.txt
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Xiao Guangrong [Mon, 20 Sep 2010 14:16:45 +0000 (22:16 +0800)]
KVM: fix the description of kvm-amd.nested in documentation
The default state of 'kvm-amd.nested' is enabled now, so fix the documentation
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Gleb Natapov [Mon, 20 Sep 2010 08:15:32 +0000 (10:15 +0200)]
KVM: SVM: do not generate "external interrupt exit" if other exit is pending
Nested SVM checks for external interrupt after injecting nested exception.
In case there is external interrupt pending the code generates "external
interrupt exit" and overwrites previous exit info. If previously injected
exception already generated exit it will be lost.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Acked-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>