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linux-sg2042
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Merge branch 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip 

* 'x86-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  x86, pci: Correct spelling in a comment
  x86: Simplify bound checks in the MTRR code
  x86: EDAC: carve out AMD MCE decoding logic
  initcalls: Add early_initcall() for modules
  x86: EDAC: MCE: Fix MCE decoding callback logic
This commit is contained in:
Linus Torvalds 2009-10-08 12:06:36 -07:00
parent f17f36bb1c e3be785fb5
commit 624235c5b3
8 changed files with 99 additions and 36 deletions
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2
arch/x86/include/asm/mce.h
View File

@ -133,6 +133,8 @@ static inline void winchip_mcheck_init(struct cpuinfo_x86 *c) {}
static inline void enable_p5_mce(void) {}
#endif
extern void (*x86_mce_decode_callback)(struct mce *m);
void mce_setup(struct mce *m);
void mce_log(struct mce *m);
DECLARE_PER_CPU(struct sys_device, mce_dev);

62
arch/x86/kernel/cpu/mcheck/mce.c
View File

@ -85,6 +85,18 @@ static DECLARE_WAIT_QUEUE_HEAD(mce_wait);
static DEFINE_PER_CPU(struct mce, mces_seen);
static int cpu_missing;
static void default_decode_mce(struct mce *m)
{
pr_emerg("No human readable MCE decoding support on this CPU type.\n");
pr_emerg("Run the message through 'mcelog --ascii' to decode.\n");
}
/*
* CPU/chipset specific EDAC code can register a callback here to print
* MCE errors in a human-readable form:
*/
void (*x86_mce_decode_callback)(struct mce *m) = default_decode_mce;
EXPORT_SYMBOL(x86_mce_decode_callback);
/* MCA banks polled by the period polling timer for corrected events */
DEFINE_PER_CPU(mce_banks_t, mce_poll_banks) = {
@ -165,46 +177,46 @@ void mce_log(struct mce *mce)
set_bit(0, &mce_need_notify);
}
void __weak decode_mce(struct mce *m)
{
return;
}
static void print_mce(struct mce *m)
{
printk(KERN_EMERG
"CPU %d: Machine Check Exception: %16Lx Bank %d: %016Lx\n",
pr_emerg("CPU %d: Machine Check Exception: %16Lx Bank %d: %016Lx\n",
m->extcpu, m->mcgstatus, m->bank, m->status);
if (m->ip) {
printk(KERN_EMERG "RIP%s %02x:<%016Lx> ",
!(m->mcgstatus & MCG_STATUS_EIPV) ? " !INEXACT!" : "",
m->cs, m->ip);
pr_emerg("RIP%s %02x:<%016Lx> ",
!(m->mcgstatus & MCG_STATUS_EIPV) ? " !INEXACT!" : "",
m->cs, m->ip);
if (m->cs == __KERNEL_CS)
print_symbol("{%s}", m->ip);
printk(KERN_CONT "\n");
pr_cont("\n");
}
printk(KERN_EMERG "TSC %llx ", m->tsc);
if (m->addr)
printk(KERN_CONT "ADDR %llx ", m->addr);
if (m->misc)
printk(KERN_CONT "MISC %llx ", m->misc);
printk(KERN_CONT "\n");
printk(KERN_EMERG "PROCESSOR %u:%x TIME %llu SOCKET %u APIC %x\n",
m->cpuvendor, m->cpuid, m->time, m->socketid,
m->apicid);
decode_mce(m);
pr_emerg("TSC %llx ", m->tsc);
if (m->addr)
pr_cont("ADDR %llx ", m->addr);
if (m->misc)
pr_cont("MISC %llx ", m->misc);
pr_cont("\n");
pr_emerg("PROCESSOR %u:%x TIME %llu SOCKET %u APIC %x\n",
m->cpuvendor, m->cpuid, m->time, m->socketid, m->apicid);
/*
* Print out human-readable details about the MCE error,
* (if the CPU has an implementation for that):
*/
x86_mce_decode_callback(m);
}
static void print_mce_head(void)
{
printk(KERN_EMERG "\nHARDWARE ERROR\n");
pr_emerg("\nHARDWARE ERROR\n");
}
static void print_mce_tail(void)
{
printk(KERN_EMERG "This is not a software problem!\n"
"Run through mcelog --ascii to decode and contact your hardware vendor\n");
pr_emerg("This is not a software problem!\n");
}
#define PANIC_TIMEOUT 5 /* 5 seconds */
@ -218,6 +230,7 @@ static atomic_t mce_fake_paniced;
static void wait_for_panic(void)
{
long timeout = PANIC_TIMEOUT*USEC_PER_SEC;
preempt_disable();
local_irq_enable();
while (timeout-- > 0)
@ -285,6 +298,7 @@ static void mce_panic(char *msg, struct mce *final, char *exp)
static int msr_to_offset(u32 msr)
{
unsigned bank = __get_cpu_var(injectm.bank);
if (msr == rip_msr)
return offsetof(struct mce, ip);
if (msr == MSR_IA32_MCx_STATUS(bank))

17
arch/x86/kernel/cpu/mtrr/if.c
View File

@ -96,17 +96,24 @@ mtrr_write(struct file *file, const char __user *buf, size_t len, loff_t * ppos)
unsigned long long base, size;
char *ptr;
char line[LINE_SIZE];
int length;
size_t linelen;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
if (!len)
return -EINVAL;
memset(line, 0, LINE_SIZE);
if (len > LINE_SIZE)
len = LINE_SIZE;
if (copy_from_user(line, buf, len - 1))
length = len;
length--;
if (length > LINE_SIZE - 1)
length = LINE_SIZE - 1;
if (length < 0)
return -EINVAL;
if (copy_from_user(line, buf, length))
return -EFAULT;
linelen = strlen(line);

2
arch/x86/kernel/pci-dma.c
View File

@ -35,7 +35,7 @@ int iommu_detected __read_mostly = 0;
/*
* This variable becomes 1 if iommu=pt is passed on the kernel command line.
* If this variable is 1, IOMMU implementations do no DMA ranslation for
* If this variable is 1, IOMMU implementations do no DMA translation for
* devices and allow every device to access to whole physical memory. This is
* useful if a user want to use an IOMMU only for KVM device assignment to
* guests and not for driver dma translation.

14
drivers/edac/Kconfig
View File

@ -47,6 +47,18 @@ config EDAC_DEBUG_VERBOSE
Source file name and line number where debugging message
printed will be added to debugging message.
config EDAC_DECODE_MCE
tristate "Decode MCEs in human-readable form (only on AMD for now)"
depends on CPU_SUP_AMD && X86_MCE
default y
---help---
Enable this option if you want to decode Machine Check Exceptions
occuring on your machine in human-readable form.
You should definitely say Y here in case you want to decode MCEs
which occur really early upon boot, before the module infrastructure
has been initialized.
config EDAC_MM_EDAC
tristate "Main Memory EDAC (Error Detection And Correction) reporting"
help
@ -59,7 +71,7 @@ config EDAC_MM_EDAC
config EDAC_AMD64
tristate "AMD64 (Opteron, Athlon64) K8, F10h, F11h"
depends on EDAC_MM_EDAC && K8_NB && X86_64 && PCI && CPU_SUP_AMD
depends on EDAC_MM_EDAC && K8_NB && X86_64 && PCI && EDAC_DECODE_MCE
help
Support for error detection and correction on the AMD 64
Families of Memory Controllers (K8, F10h and F11h)

5
drivers/edac/Makefile
View File

@ -6,7 +6,6 @@
# GNU General Public License.
#
obj-$(CONFIG_EDAC) := edac_stub.o
obj-$(CONFIG_EDAC_MM_EDAC) += edac_core.o
@ -17,9 +16,7 @@ ifdef CONFIG_PCI
edac_core-objs += edac_pci.o edac_pci_sysfs.o
endif
ifdef CONFIG_CPU_SUP_AMD
edac_core-objs += edac_mce_amd.o
endif
obj-$(CONFIG_EDAC_DECODE_MCE) += edac_mce_amd.o
obj-$(CONFIG_EDAC_AMD76X) += amd76x_edac.o
obj-$(CONFIG_EDAC_CPC925) += cpc925_edac.o

32
drivers/edac/edac_mce_amd.c
View File

@ -3,6 +3,7 @@
static bool report_gart_errors;
static void (*nb_bus_decoder)(int node_id, struct err_regs *regs);
static void (*orig_mce_callback)(struct mce *m);
void amd_report_gart_errors(bool v)
{
@ -362,7 +363,7 @@ static inline void amd_decode_err_code(unsigned int ec)
pr_warning("Huh? Unknown MCE error 0x%x\n", ec);
}
void decode_mce(struct mce *m)
static void amd_decode_mce(struct mce *m)
{
struct err_regs regs;
int node, ecc;
@ -420,3 +421,32 @@ void decode_mce(struct mce *m)
amd_decode_err_code(m->status & 0xffff);
}
static int __init mce_amd_init(void)
{
/*
* We can decode MCEs for Opteron and later CPUs:
*/
if ((boot_cpu_data.x86_vendor == X86_VENDOR_AMD) &&
(boot_cpu_data.x86 >= 0xf)) {
/* safe the default decode mce callback */
orig_mce_callback = x86_mce_decode_callback;
x86_mce_decode_callback = amd_decode_mce;
}
return 0;
}
early_initcall(mce_amd_init);
#ifdef MODULE
static void __exit mce_amd_exit(void)
{
x86_mce_decode_callback = orig_mce_callback;
}
MODULE_DESCRIPTION("AMD MCE decoder");
MODULE_ALIAS("edac-mce-amd");
MODULE_LICENSE("GPL");
module_exit(mce_amd_exit);
#endif

1
include/linux/init.h
View File

@ -271,6 +271,7 @@ void __init parse_early_options(char *cmdline);
#else /* MODULE */
/* Don't use these in modules, but some people do... */
#define early_initcall(fn) module_init(fn)
#define core_initcall(fn) module_init(fn)
#define postcore_initcall(fn) module_init(fn)
#define arch_initcall(fn) module_init(fn)