efi: Decode IA32/X64 Processor Error Section

Recognize the IA32/X64 Processor Error Section.

Do the section decoding in a new "cper-x86.c" file and add this to the
Makefile depending on a new "UEFI_CPER_X86" config option.

Print the Local APIC ID and CPUID info from the Processor Error Record.

The "Processor Error Info" and "Processor Context" fields will be
decoded in following patches.

Based on UEFI 2.7 Table 252. Processor Error Record.

Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-efi@vger.kernel.org
Link: http://lkml.kernel.org/r/20180504060003.19618-5-ard.biesheuvel@linaro.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>

diff --git a/drivers/firmware/efi/Kconfig b/drivers/firmware/efi/Kconfig
index 3098410..781a4a3 100644 (file)
--- a/drivers/firmware/efi/Kconfig
+++ b/drivers/firmware/efi/Kconfig
@@ -174,6 +174,11 @@ config UEFI_CPER_ARM
        depends on UEFI_CPER && ( ARM || ARM64 )
        default y
 
+config UEFI_CPER_X86
+       bool
+       depends on UEFI_CPER && X86
+       default y
+
 config EFI_DEV_PATH_PARSER
        bool
        depends on ACPI

diff --git a/drivers/firmware/efi/Makefile b/drivers/firmware/efi/Makefile
index cb80537..5f9f503 100644 (file)
--- a/drivers/firmware/efi/Makefile
+++ b/drivers/firmware/efi/Makefile
@@ -31,3 +31,4 @@ obj-$(CONFIG_ARM)                     += $(arm-obj-y)
 obj-$(CONFIG_ARM64)                    += $(arm-obj-y)
 obj-$(CONFIG_EFI_CAPSULE_LOADER)       += capsule-loader.o
 obj-$(CONFIG_UEFI_CPER_ARM)            += cper-arm.o
+obj-$(CONFIG_UEFI_CPER_X86)            += cper-x86.o

diff --git a/drivers/firmware/efi/cper-x86.c b/drivers/firmware/efi/cper-x86.c
new file mode 100644 (file)
index 0000000..863f0cd
--- /dev/null
+++ b/drivers/firmware/efi/cper-x86.c
@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2018, Advanced Micro Devices, Inc.
+
+#include <linux/cper.h>
+
+/*
+ * We don't need a "CPER_IA" prefix since these are all locally defined.
+ * This will save us a lot of line space.
+ */
+#define VALID_LAPIC_ID                 BIT_ULL(0)
+#define VALID_CPUID_INFO               BIT_ULL(1)
+
+void cper_print_proc_ia(const char *pfx, const struct cper_sec_proc_ia *proc)
+{
+       if (proc->validation_bits & VALID_LAPIC_ID)
+               printk("%sLocal APIC_ID: 0x%llx\n", pfx, proc->lapic_id);
+
+       if (proc->validation_bits & VALID_CPUID_INFO) {
+               printk("%sCPUID Info:\n", pfx);
+               print_hex_dump(pfx, "", DUMP_PREFIX_OFFSET, 16, 4, proc->cpuid,
+                              sizeof(proc->cpuid), 0);
+       }
+}

diff --git a/drivers/firmware/efi/cper.c b/drivers/firmware/efi/cper.c
index ab21f16..3bf0dca 100644 (file)
--- a/drivers/firmware/efi/cper.c
+++ b/drivers/firmware/efi/cper.c
@@ -468,6 +468,16 @@ cper_estatus_print_section(const char *pfx, struct acpi_hest_generic_data *gdata
                else
                        goto err_section_too_small;
 #endif
+#if defined(CONFIG_UEFI_CPER_X86)
+       } else if (guid_equal(sec_type, &CPER_SEC_PROC_IA)) {
+               struct cper_sec_proc_ia *ia_err = acpi_hest_get_payload(gdata);
+
+               printk("%ssection_type: IA32/X64 processor error\n", newpfx);
+               if (gdata->error_data_length >= sizeof(*ia_err))
+                       cper_print_proc_ia(newpfx, ia_err);
+               else
+                       goto err_section_too_small;
+#endif
        } else {
                const void *err = acpi_hest_get_payload(gdata);
 

diff --git a/include/linux/cper.h b/include/linux/cper.h
index 4b5f845..9c703a0 100644 (file)
--- a/include/linux/cper.h
+++ b/include/linux/cper.h
@@ -551,5 +551,7 @@ const char *cper_mem_err_unpack(struct trace_seq *,
                                struct cper_mem_err_compact *);
 void cper_print_proc_arm(const char *pfx,
                         const struct cper_sec_proc_arm *proc);
+void cper_print_proc_ia(const char *pfx,
+                       const struct cper_sec_proc_ia *proc);
 
 #endif