linux-kernel - [tip: ras/core] x86/mce/inject: Add IPID for injection too

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Message-ID: <161654139112.398.16619229725316596585.tip-bot2@tip-bot2>
Date:   Tue, 23 Mar 2021 23:16:31 -0000
From:   "tip-bot2 for Borislav Petkov" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Borislav Petkov <bp@...e.de>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: ras/core] x86/mce/inject: Add IPID for injection too

The following commit has been merged into the ras/core branch of tip:

Commit-ID:     2ffdc2c34421561c12f843e497dd7ce898478c0f
Gitweb:        https://git.kernel.org/tip/2ffdc2c34421561c12f843e497dd7ce898478c0f
Author:        Borislav Petkov <bp@...e.de>
AuthorDate:    Sat, 13 Mar 2021 17:13:29 +01:00
Committer:     Borislav Petkov <bp@...e.de>
CommitterDate: Wed, 24 Mar 2021 00:04:45 +01:00

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@...e.de>
Link: https://lkml.kernel.org/r/20210314201806.12798-1-bp@alien8.de
---
 arch/x86/kernel/cpu/mce/inject.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/x86/kernel/cpu/mce/inject.c b/arch/x86/kernel/cpu/mce/inject.c
index 7b36073..4e86d97 100644
--- 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 },