Commit 2ffdc2c3 authored by Borislav Petkov's avatar Borislav Petkov
Browse files

x86/mce/inject: Add IPID for injection too 



Add an injection file in order to specify the IPID too when injecting
an error. One use case example is using the machinery to decode MCEs
collected from other machines.

Signed-off-by: default avatarBorislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210314201806.12798-1-bp@alien8.de
parent 0d02ec6b

arch/x86/kernel/cpu/mce/inject.c

+6 −0
Original line number Diff line number Diff line
@@ -74,6 +74,7 @@ MCE_INJECT_SET(status); 
MCE_INJECT_SET(misc);

MCE_INJECT_SET(addr);

MCE_INJECT_SET(synd);

MCE_INJECT_SET(ipid);



#define MCE_INJECT_GET(reg)						\

static int inj_##reg##_get(void *data, u64 *val)			\
@@ -88,11 +89,13 @@ MCE_INJECT_GET(status); 
MCE_INJECT_GET(misc);

MCE_INJECT_GET(addr);

MCE_INJECT_GET(synd);

MCE_INJECT_GET(ipid);



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");

DEFINE_SIMPLE_ATTRIBUTE(ipid_fops, inj_ipid_get, inj_ipid_set, "%llx\n");



static void setup_inj_struct(struct mce *m)

{
@@ -629,6 +632,8 @@ static const char readme_msg[] = 
"\t    is present in hardware. \n"

"\t  - \"th\": Trigger APIC interrupt for Threshold errors. Causes threshold \n"

"\t    APIC interrupt handler to handle the error. \n"

"\n"

"ipid:\t IPID (AMD-specific)\n"

"\n";



static ssize_t
@@ -652,6 +657,7 @@ static struct dfs_node { 
	{ .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 = "ipid",	.fops = &ipid_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 },