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x86/RAS: Add syndrome support to mce_amd_inj

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Add a debugfs file which holds the error syndrome (written into
MCA_SYND) of an injected error. Only write it on SMCA systems. Update
README file, while at it.

Signed-off-by: Yazen Ghannam <Yazen.Ghannam@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: http://lkml.kernel.org/r/1467633035-32080-3-git-send-email-Yazen.Ghannam@amd.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Yazen Ghannam 2016-09-12 09:59:30 +02:00 committed by Thomas Gleixner
parent b300e87300
commit bad744b7f2
1 changed files with 11 additions and 0 deletions
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11
arch/x86/ras/mce_amd_inj.c
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@ -68,6 +68,7 @@ static int inj_##reg##_set(void *data, u64 val) \
MCE_INJECT_SET(status);
MCE_INJECT_SET(misc);
MCE_INJECT_SET(addr);
MCE_INJECT_SET(synd);
#define MCE_INJECT_GET(reg) \
static int inj_##reg##_get(void *data, u64 *val) \
@ -81,10 +82,12 @@ static int inj_##reg##_get(void *data, u64 *val) \
MCE_INJECT_GET(status);
MCE_INJECT_GET(misc);
MCE_INJECT_GET(addr);
MCE_INJECT_GET(synd);
DEFINE_SIMPLE_ATTRIBUTE(status_fops, inj_status_get, inj_status_set, "%llx\n");
DEFINE_SIMPLE_ATTRIBUTE(misc_fops, inj_misc_get, inj_misc_set, "%llx\n");
DEFINE_SIMPLE_ATTRIBUTE(addr_fops, inj_addr_get, inj_addr_set, "%llx\n");
DEFINE_SIMPLE_ATTRIBUTE(synd_fops, inj_synd_get, inj_synd_set, "%llx\n");
/*
* Caller needs to be make sure this cpu doesn't disappear
@ -258,6 +261,7 @@ static void prepare_msrs(void *info)
}
wrmsrl(MSR_AMD64_SMCA_MCx_MISC(b), i_mce.misc);
wrmsrl(MSR_AMD64_SMCA_MCx_SYND(b), i_mce.synd);
} else {
wrmsrl(MSR_IA32_MCx_STATUS(b), i_mce.status);
wrmsrl(MSR_IA32_MCx_ADDR(b), i_mce.addr);
@ -275,6 +279,9 @@ static void do_inject(void)
if (i_mce.misc)
i_mce.status |= MCI_STATUS_MISCV;
if (i_mce.synd)
i_mce.status |= MCI_STATUS_SYNDV;
if (inj_type == SW_INJ) {
mce_inject_log(&i_mce);
return;
@ -371,6 +378,9 @@ static const char readme_msg[] =
"\t used for error thresholding purposes and its validity is indicated by\n"
"\t MCi_STATUS[MiscV].\n"
"\n"
"synd:\t Set MCi_SYND: provide syndrome info about the error. Only valid on\n"
"\t Scalable MCA systems, and its validity is indicated by MCi_STATUS[SyndV].\n"
"\n"
"addr:\t Error address value to be written to MCi_ADDR. Log address information\n"
"\t associated with the error.\n"
"\n"
@ -420,6 +430,7 @@ static struct dfs_node {
{ .name = "status", .fops = &status_fops, .perm = S_IRUSR | S_IWUSR },
{ .name = "misc", .fops = &misc_fops, .perm = S_IRUSR | S_IWUSR },
{ .name = "addr", .fops = &addr_fops, .perm = S_IRUSR | S_IWUSR },
{ .name = "synd", .fops = &synd_fops, .perm = S_IRUSR | S_IWUSR },
{ .name = "bank", .fops = &bank_fops, .perm = S_IRUSR | S_IWUSR },
{ .name = "flags", .fops = &flags_fops, .perm = S_IRUSR | S_IWUSR },
{ .name = "cpu", .fops = &extcpu_fops, .perm = S_IRUSR | S_IWUSR },