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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] RE: [Xen-devel] [PATCH 7] MCA: simplify mce actoin, and some update of mem err handler for future SRAR extension
OK, thanks :)
Jinsong
Keir Fraser wrote:
> Ah no, I found it! I'll take a look at it on Monday.
>
> -- Keir
>
> On 14/05/2011 10:45, "Keir Fraser" <keir@xxxxxxx> wrote:
>
>> I don't seem to have this one in my queue. You should resend.
>>
>> -- Keir
>>
>> On 13/05/2011 15:34, "Liu, Jinsong" <jinsong.liu@xxxxxxxxx> wrote:
>>
>>> Jan and Keir,
>>>
>>> Any comments?
>>>
>>> Thanks
>>> Jinsong
>>>
>>>
>>> Liu, Jinsong wrote:
>>>> 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 */
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