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- Add a tunable 'hw.mca.enabled' that can be used to enable/disable the
machine check code. Disable it by default for now. - When computing the mask of bits that determines a non-restartable event during a machine check exception, or-in the overflow flag rather than replacing the other flags. PR: i386/134586 [2] Submitted by: Andi Kleen andi-fbsd firstfloor.org
This commit is contained in:
parent
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commit
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=192343
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@ -55,10 +55,15 @@ struct mca_internal {
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static MALLOC_DEFINE(M_MCA, "MCA", "Machine Check Architecture");
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static struct sysctl_oid *mca_sysctl_tree;
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static int mca_count; /* Number of records stored. */
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SYSCTL_NODE(_hw, OID_AUTO, mca, CTLFLAG_RD, NULL, "Machine Check Architecture");
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static int mca_enabled = 0;
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TUNABLE_INT("hw.mca.enabled", &mca_enabled);
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SYSCTL_INT(_hw_mca, OID_AUTO, enabled, CTLFLAG_RDTUN, &mca_enabled, 0,
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"Administrative toggle for machine check support");
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static STAILQ_HEAD(, mca_internal) mca_records;
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static struct callout mca_timer;
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static int mca_ticks = 3600; /* Check hourly by default. */
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@ -346,7 +351,7 @@ mca_scan(int mcip)
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/* When handling a MCE#, treat the OVER flag as non-restartable. */
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if (mcip)
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ucmask = MC_STATUS_OVER;
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ucmask |= MC_STATUS_OVER;
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mcg_cap = rdmsr(MSR_MCG_CAP);
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for (i = 0; i < (mcg_cap & MCG_CAP_COUNT); i++) {
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rec = mca_record_entry(i);
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@ -426,7 +431,7 @@ static void
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mca_startup(void *dummy)
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{
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if (!(cpu_feature & CPUID_MCA))
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if (!mca_enabled || !(cpu_feature & CPUID_MCA))
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return;
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callout_reset(&mca_timer, mca_ticks * hz, mca_periodic_scan,
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@ -442,17 +447,15 @@ mca_setup(void)
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STAILQ_INIT(&mca_records);
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TASK_INIT(&mca_task, 0x8000, mca_scan_cpus, NULL);
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callout_init(&mca_timer, CALLOUT_MPSAFE);
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mca_sysctl_tree = SYSCTL_ADD_NODE(NULL, SYSCTL_STATIC_CHILDREN(_hw),
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OID_AUTO, "mca", CTLFLAG_RW, NULL, "MCA container");
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SYSCTL_ADD_INT(NULL, SYSCTL_CHILDREN(mca_sysctl_tree), OID_AUTO,
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SYSCTL_ADD_INT(NULL, SYSCTL_STATIC_CHILDREN(_hw_mca), OID_AUTO,
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"count", CTLFLAG_RD, &mca_count, 0, "Record count");
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SYSCTL_ADD_PROC(NULL, SYSCTL_CHILDREN(mca_sysctl_tree), OID_AUTO,
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SYSCTL_ADD_PROC(NULL, SYSCTL_STATIC_CHILDREN(_hw_mca), OID_AUTO,
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"interval", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, &mca_ticks,
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0, sysctl_mca_ticks, "I",
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"Periodic interval in seconds to scan for machine checks");
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SYSCTL_ADD_NODE(NULL, SYSCTL_CHILDREN(mca_sysctl_tree), OID_AUTO,
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SYSCTL_ADD_NODE(NULL, SYSCTL_STATIC_CHILDREN(_hw_mca), OID_AUTO,
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"records", CTLFLAG_RD, sysctl_mca_records, "Machine check records");
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SYSCTL_ADD_PROC(NULL, SYSCTL_CHILDREN(mca_sysctl_tree), OID_AUTO,
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SYSCTL_ADD_PROC(NULL, SYSCTL_STATIC_CHILDREN(_hw_mca), OID_AUTO,
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"force_scan", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, NULL, 0,
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sysctl_mca_scan, "I", "Force an immediate scan for machine checks");
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}
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@ -465,7 +468,7 @@ mca_init(void)
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int i;
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/* MCE is required. */
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if (!(cpu_feature & CPUID_MCE))
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if (!mca_enabled || !(cpu_feature & CPUID_MCE))
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return;
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if (cpu_feature & CPUID_MCA) {
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@ -55,10 +55,15 @@ struct mca_internal {
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static MALLOC_DEFINE(M_MCA, "MCA", "Machine Check Architecture");
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static struct sysctl_oid *mca_sysctl_tree;
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static int mca_count; /* Number of records stored. */
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SYSCTL_NODE(_hw, OID_AUTO, mca, CTLFLAG_RD, NULL, "Machine Check Architecture");
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static int mca_enabled = 0;
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TUNABLE_INT("hw.mca.enabled", &mca_enabled);
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SYSCTL_INT(_hw_mca, OID_AUTO, enabled, CTLFLAG_RDTUN, &mca_enabled, 0,
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"Administrative toggle for machine check support");
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static STAILQ_HEAD(, mca_internal) mca_records;
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static struct callout mca_timer;
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static int mca_ticks = 3600; /* Check hourly by default. */
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@ -346,7 +351,7 @@ mca_scan(int mcip)
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/* When handling a MCE#, treat the OVER flag as non-restartable. */
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if (mcip)
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ucmask = MC_STATUS_OVER;
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ucmask |= MC_STATUS_OVER;
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mcg_cap = rdmsr(MSR_MCG_CAP);
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for (i = 0; i < (mcg_cap & MCG_CAP_COUNT); i++) {
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rec = mca_record_entry(i);
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@ -426,7 +431,7 @@ static void
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mca_startup(void *dummy)
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{
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if (!(cpu_feature & CPUID_MCA))
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if (!mca_enabled || !(cpu_feature & CPUID_MCA))
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return;
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callout_reset(&mca_timer, mca_ticks * hz, mca_periodic_scan,
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@ -442,17 +447,15 @@ mca_setup(void)
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STAILQ_INIT(&mca_records);
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TASK_INIT(&mca_task, 0x8000, mca_scan_cpus, NULL);
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callout_init(&mca_timer, CALLOUT_MPSAFE);
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mca_sysctl_tree = SYSCTL_ADD_NODE(NULL, SYSCTL_STATIC_CHILDREN(_hw),
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OID_AUTO, "mca", CTLFLAG_RW, NULL, "MCA container");
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SYSCTL_ADD_INT(NULL, SYSCTL_CHILDREN(mca_sysctl_tree), OID_AUTO,
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SYSCTL_ADD_INT(NULL, SYSCTL_STATIC_CHILDREN(_hw_mca), OID_AUTO,
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"count", CTLFLAG_RD, &mca_count, 0, "Record count");
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SYSCTL_ADD_PROC(NULL, SYSCTL_CHILDREN(mca_sysctl_tree), OID_AUTO,
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SYSCTL_ADD_PROC(NULL, SYSCTL_STATIC_CHILDREN(_hw_mca), OID_AUTO,
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"interval", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, &mca_ticks,
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0, sysctl_mca_ticks, "I",
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"Periodic interval in seconds to scan for machine checks");
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SYSCTL_ADD_NODE(NULL, SYSCTL_CHILDREN(mca_sysctl_tree), OID_AUTO,
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SYSCTL_ADD_NODE(NULL, SYSCTL_STATIC_CHILDREN(_hw_mca), OID_AUTO,
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"records", CTLFLAG_RD, sysctl_mca_records, "Machine check records");
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SYSCTL_ADD_PROC(NULL, SYSCTL_CHILDREN(mca_sysctl_tree), OID_AUTO,
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SYSCTL_ADD_PROC(NULL, SYSCTL_STATIC_CHILDREN(_hw_mca), OID_AUTO,
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"force_scan", CTLTYPE_INT | CTLFLAG_RW | CTLFLAG_MPSAFE, NULL, 0,
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sysctl_mca_scan, "I", "Force an immediate scan for machine checks");
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}
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@ -465,7 +468,7 @@ mca_init(void)
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int i;
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/* MCE is required. */
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if (!(cpu_feature & CPUID_MCE))
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if (!mca_enabled || !(cpu_feature & CPUID_MCE))
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return;
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if (cpu_feature & CPUID_MCA) {
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