MCA: simplify mce actoin, and some update of mem err handler for future SRAR
extension
This patch simplify mce_action(). Basically the 2 set of mce status flags
MCA_... and MCER_... are highly functional similar. This patch remove the
redundant middle-level flag MCA_..., and its related data structure and
function, so that mce_action() logic is more clean and simpler.
This patch also update mem err handler. intel_memerr_dhandler() will be
commonly used by SRAO and SRAR, so for the extension of future SRAR case, this
patch remove the default fail flag from intel_memerr_dhandler() outside to
SRAO/SRAR level, since only SRAO/SRAR handler itself has the knowledge of how
to handle the failure when mem err handler fail.
Signed-off-by: Liu, Jinsong <jinsong.liu@xxxxxxxxx>
diff -r e7cd79cd6626 xen/arch/x86/cpu/mcheck/mce_intel.c
--- a/xen/arch/x86/cpu/mcheck/mce_intel.c Sun May 08 13:39:40 2011 +0800
+++ b/xen/arch/x86/cpu/mcheck/mce_intel.c Sun May 08 18:15:13 2011 +0800
@@ -172,23 +172,14 @@ static unsigned int __read_mostly mce_dh
static unsigned int __read_mostly mce_dhandler_num;
static unsigned int __read_mostly mce_uhandler_num;
-enum mce_result
-{
- MCER_NOERROR,
- MCER_RECOVERED,
- /* Not recoverd, but can continue */
- MCER_CONTINUE,
- MCER_RESET,
-};
-
/* Maybe called in MCE context, no lock, no printk */
static enum mce_result mce_action(struct cpu_user_regs *regs,
mctelem_cookie_t mctc)
{
struct mc_info *local_mi;
- enum mce_result ret = MCER_NOERROR;
+ enum mce_result bank_result = MCER_NOERROR;
+ enum mce_result worst_result = MCER_NOERROR;
struct mcinfo_common *mic = NULL;
- struct mca_handle_result mca_res;
struct mca_binfo binfo;
const struct mca_error_handler *handlers = mce_dhandlers;
unsigned int i, handler_num = mce_dhandler_num;
@@ -217,7 +208,7 @@ static enum mce_result mce_action(struct
/* Processing bank information */
x86_mcinfo_lookup(mic, local_mi, MC_TYPE_BANK);
- for ( ; ret != MCER_RESET && mic && mic->size;
+ for ( ; bank_result != MCER_RESET && mic && mic->size;
mic = x86_mcinfo_next(mic) )
{
if (mic->type != MC_TYPE_BANK) {
@@ -225,34 +216,20 @@ static enum mce_result mce_action(struct
}
binfo.mib = (struct mcinfo_bank*)mic;
binfo.bank = binfo.mib->mc_bank;
- memset(&mca_res, 0x0f, sizeof(mca_res));
+ bank_result = MCER_NOERROR;
for ( i = 0; i < handler_num; i++ ) {
if (handlers[i].owned_error(binfo.mib->mc_status))
{
- handlers[i].recovery_handler(&binfo, &mca_res);
-
- if (mca_res.result & MCA_OWNER)
- binfo.mib->mc_domid = mca_res.owner;
-
- if (mca_res.result == MCA_NEED_RESET)
- ret = MCER_RESET;
- else if (mca_res.result == MCA_RECOVERED)
- {
- if (ret < MCER_RECOVERED)
- ret = MCER_RECOVERED;
- }
- else if (mca_res.result == MCA_NO_ACTION)
- {
- if (ret < MCER_CONTINUE)
- ret = MCER_CONTINUE;
- }
+ handlers[i].recovery_handler(&binfo, &bank_result);
+ if (worst_result < bank_result)
+ worst_result = bank_result;
break;
}
}
ASSERT(i != handler_num);
}
- return ret;
+ return worst_result;
}
/*
@@ -608,7 +585,7 @@ struct mcinfo_recovery *mci_add_pageoff_
static void intel_memerr_dhandler(
struct mca_binfo *binfo,
- struct mca_handle_result *result)
+ enum mce_result *result)
{
struct mcinfo_bank *bank = binfo->mib;
struct mcinfo_global *global = binfo->mig;
@@ -618,7 +595,6 @@ static void intel_memerr_dhandler(
uint64_t mc_status, mc_misc;
mce_printk(MCE_VERBOSE, "MCE: Enter UCR recovery action\n");
- result->result = MCA_NEED_RESET;
mc_status = bank->mc_status;
mc_misc = bank->mc_misc;
@@ -626,7 +602,6 @@ static void intel_memerr_dhandler(
!(mc_status & MCi_STATUS_MISCV) ||
((mc_misc & MCi_MISC_ADDRMOD_MASK) != MCi_MISC_PHYSMOD) )
{
- result->result |= MCA_NO_ACTION;
dprintk(XENLOG_WARNING,
"No physical address provided for memory error\n");
return;
@@ -644,23 +619,19 @@ static void intel_memerr_dhandler(
/* This is free page */
if (status & PG_OFFLINE_OFFLINED)
- result->result = MCA_RECOVERED;
+ *result = MCER_RECOVERED;
else if (status & PG_OFFLINE_PENDING) {
/* This page has owner */
if (status & PG_OFFLINE_OWNED) {
- result->result |= MCA_OWNER;
- result->owner = status >> PG_OFFLINE_OWNER_SHIFT;
+ bank->mc_domid = status >> PG_OFFLINE_OWNER_SHIFT;
mce_printk(MCE_QUIET, "MCE: This error page is ownded"
- " by DOM %d\n", result->owner);
- /* Fill vMCE# injection and vMCE# MSR virtualization "
- * "related data */
- bank->mc_domid = result->owner;
+ " by DOM %d\n", bank->mc_domid);
/* XXX: Cannot handle shared pages yet
* (this should identify all domains and gfn mapping to
* the mfn in question) */
- BUG_ON( result->owner == DOMID_COW );
- if ( result->owner != DOMID_XEN ) {
- d = get_domain_by_id(result->owner);
+ BUG_ON( bank->mc_domid == DOMID_COW );
+ if ( bank->mc_domid != DOMID_XEN ) {
+ d = get_domain_by_id(bank->mc_domid);
ASSERT(d);
gfn = get_gpfn_from_mfn((bank->mc_addr) >> PAGE_SHIFT);
@@ -683,7 +654,7 @@ static void intel_memerr_dhandler(
global->mc_gstatus) == -1 )
{
mce_printk(MCE_QUIET, "Fill vMCE# data for DOM%d "
- "failed\n", result->owner);
+ "failed\n", bank->mc_domid);
goto vmce_failed;
}
@@ -699,7 +670,7 @@ static void intel_memerr_dhandler(
* For xen, it has contained the error and finished
* its own recovery job.
*/
- result->result = MCA_RECOVERED;
+ *result = MCER_RECOVERED;
put_domain(d);
return;
@@ -718,11 +689,13 @@ static int intel_srao_check(uint64_t sta
static void intel_srao_dhandler(
struct mca_binfo *binfo,
- struct mca_handle_result *result)
+ enum mce_result *result)
{
uint64_t status = binfo->mib->mc_status;
/* For unknown srao error code, no action required */
+ *result = MCER_CONTINUE;
+
if ( status & MCi_STATUS_VAL )
{
switch ( status & INTEL_MCCOD_MASK )
@@ -744,7 +717,7 @@ static int intel_default_check(uint64_t
static void intel_default_mce_dhandler(
struct mca_binfo *binfo,
- struct mca_handle_result *result)
+ enum mce_result *result)
{
uint64_t status = binfo->mib->mc_status;
enum intel_mce_type type;
@@ -752,9 +725,9 @@ static void intel_default_mce_dhandler(
type = intel_check_mce_type(status);
if (type == intel_mce_fatal || type == intel_mce_ucr_srar)
- result->result = MCA_NEED_RESET;
- else if (type == intel_mce_ucr_srao)
- result->result = MCA_NO_ACTION;
+ *result = MCER_RESET;
+ else
+ *result = MCER_CONTINUE;
}
static const struct mca_error_handler intel_mce_dhandlers[] = {
@@ -764,7 +737,7 @@ static const struct mca_error_handler in
static void intel_default_mce_uhandler(
struct mca_binfo *binfo,
- struct mca_handle_result *result)
+ enum mce_result *result)
{
uint64_t status = binfo->mib->mc_status;
enum intel_mce_type type;
@@ -776,10 +749,10 @@ static void intel_default_mce_uhandler(
/* Panic if no handler for SRAR error */
case intel_mce_ucr_srar:
case intel_mce_fatal:
- result->result = MCA_NEED_RESET;
+ *result = MCER_RESET;
break;
default:
- result->result = MCA_NO_ACTION;
+ *result = MCER_CONTINUE;
break;
}
}
diff -r e7cd79cd6626 xen/arch/x86/cpu/mcheck/x86_mca.h
--- a/xen/arch/x86/cpu/mcheck/x86_mca.h Sun May 08 13:39:40 2011 +0800
+++ b/xen/arch/x86/cpu/mcheck/x86_mca.h Sun May 08 18:15:13 2011 +0800
@@ -124,36 +124,6 @@ void mcabanks_free(struct mca_banks *ban
void mcabanks_free(struct mca_banks *banks);
extern struct mca_banks *mca_allbanks;
-/* Below interfaces are defined for MCA internal processing:
- * a. pre_handler will be called early in MCA ISR context, mainly for early
- * need_reset detection for avoiding log missing. Also, it is used to judge
- * impacted DOMAIN if possible.
- * b. mca_error_handler is actually a (error_action_index,
- * recovery_hanlder pointer) pair. The defined recovery_handler
- * performs the actual recovery operations such as page_offline, cpu_offline
- * in softIRQ context when the per_bank MCA error matching the corresponding
- * mca_code index. If pre_handler can't judge the impacted domain,
- * recovery_handler must figure it out.
-*/
-
-/* MCA error has been recovered successfully by the recovery action*/
-#define MCA_RECOVERED (0x1 << 0)
-/* MCA error impact the specified DOMAIN in owner field below */
-#define MCA_OWNER (0x1 << 1)
-/* MCA error can't be recovered and need reset */
-#define MCA_NEED_RESET (0x1 << 2)
-/* MCA error did not have any action yet */
-#define MCA_NO_ACTION (0x1 << 3)
-
-struct mca_handle_result
-{
- uint32_t result;
- /* Used one result & MCA_OWNER */
- domid_t owner;
- /* Used by mca_error_handler, result & MCA_RECOVRED */
- struct recovery_action *action;
-};
-
/*Keep bank so that we can get staus even if mib is NULL */
struct mca_binfo {
int bank;
@@ -163,8 +133,14 @@ struct mca_binfo {
struct cpu_user_regs *regs;
};
-extern void (*mca_prehandler)( struct cpu_user_regs *regs,
- struct mca_handle_result *result);
+enum mce_result
+{
+ MCER_NOERROR,
+ MCER_RECOVERED,
+ /* Not recoverd, but can continue */
+ MCER_CONTINUE,
+ MCER_RESET,
+};
struct mca_error_handler
{
@@ -175,7 +151,7 @@ struct mca_error_handler
*/
int (*owned_error)(uint64_t status);
void (*recovery_handler)(struct mca_binfo *binfo,
- struct mca_handle_result *result);
+ enum mce_result *result);
};
/* Global variables */
mca-cleanup-7.patch
Description: mca-cleanup-7.patch
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