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: Borislav Petkov <bp@suse.de>
Link: https://lkml.kernel.org/r/20210314201806.12798-1-bp@alien8.de

diff --git a/arch/x86/kernel/cpu/mce/inject.c b/arch/x86/kernel/cpu/mce/inject.c
index 7b360731fc2d058480f059cbd92cffd1213a7615..4e86d97f96530a92f1f7f6b8a889757559097f66 100644 (file)
--- a/arch/x86/kernel/cpu/mce/inject.c
+++ b/arch/x86/kernel/cpu/mce/inject.c
@@ -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 },