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x86/mce: Add Zhaoxin CMCI support 

mainline inclusion
from mainline-v5.4-rc1
commit <5a3d56a034be9e8e87a6cb9ed3f2928184db1417>
category: feature

-------------------

All newer Zhaoxin CPUs support CMCI and are compatible with Intel's
Machine-Check Architecture. Add that support for Zhaoxin CPUs.

 [ bp: Massage comments and export intel_init_cmci(). ]

Signed-off-by: Tony W Wang-oc <TonyWWang-oc@zhaoxin.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Cc: CooperYan@zhaoxin.com
Cc: DavidWang@zhaoxin.com
Cc: HerryYang@zhaoxin.com
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: QiyuanWang@zhaoxin.com
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Tony Luck <tony.luck@intel.com>
Cc: x86-ml <x86@kernel.org>
Link: https://lkml.kernel.org/r/1568787573-1297-4-git-send-email-TonyWWang-oc@zhaoxin.com

Signed-off-by: leoliu-oc <leoliu-oc@zhaoxin.com>
This commit is contained in:
leoliu-oc 2024-08-26 17:38:14 +08:00
parent 48e4acdaec
commit 917b905e6c
3 changed files with 33 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
arch/x86/kernel/cpu/mce/core.c
View File

@ -1895,6 +1895,29 @@ static void mce_centaur_feature_init(struct cpuinfo_x86 *c)
} }
} }
static void mce_zhaoxin_feature_init(struct cpuinfo_x86 *c)
{
struct mce_bank *mce_banks = this_cpu_ptr(mce_banks_array);
/*
* These CPUs have MCA bank 8 which reports only one error type called
* SVAD (System View Address Decoder). The reporting of that error is
* controlled by IA32_MC8.CTL.0.
*
* If enabled, prefetching on these CPUs will cause SVAD MCE when
* virtual machines start and result in a system panic. Always disable
* bank 8 SVAD error by default.
*/
if ((c->x86 == 7 && c->x86_model == 0x1b) ||
(c->x86_model == 0x19 || c->x86_model == 0x1f)) {
if (this_cpu_read(mce_num_banks) > 8)
mce_banks[8].ctl = 0;
}
intel_init_cmci();
mce_adjust_timer = cmci_intel_adjust_timer;
}
static void __mcheck_cpu_init_vendor(struct cpuinfo_x86 *c) static void __mcheck_cpu_init_vendor(struct cpuinfo_x86 *c)
{ {
switch (c->x86_vendor) { switch (c->x86_vendor) {
@ -1916,6 +1939,10 @@ static void __mcheck_cpu_init_vendor(struct cpuinfo_x86 *c)
mce_centaur_feature_init(c); mce_centaur_feature_init(c);
break; break;
case X86_VENDOR_ZHAOXIN:
mce_zhaoxin_feature_init(c);
break;
default: default:
break; break;
} }

6
arch/x86/kernel/cpu/mce/intel.c
View File

@ -85,8 +85,10 @@ static int cmci_supported(int *banks)
* initialization is vendor keyed and this * initialization is vendor keyed and this
* makes sure none of the backdoors are entered otherwise. * makes sure none of the backdoors are entered otherwise.
*/ */
if (boot_cpu_data.x86_vendor != X86_VENDOR_INTEL) if (boot_cpu_data.x86_vendor != X86_VENDOR_INTEL &&
boot_cpu_data.x86_vendor != X86_VENDOR_ZHAOXIN)
return 0; return 0;
if (!boot_cpu_has(X86_FEATURE_APIC) || lapic_get_maxlvt() < 6) if (!boot_cpu_has(X86_FEATURE_APIC) || lapic_get_maxlvt() < 6)
return 0; return 0;
rdmsrl(MSR_IA32_MCG_CAP, cap); rdmsrl(MSR_IA32_MCG_CAP, cap);
@ -423,7 +425,7 @@ void cmci_disable_bank(int bank)
raw_spin_unlock_irqrestore(&cmci_discover_lock, flags); raw_spin_unlock_irqrestore(&cmci_discover_lock, flags);
} }
static void intel_init_cmci(void) void intel_init_cmci(void)
{ {
int banks; int banks;

2
arch/x86/kernel/cpu/mce/internal.h
View File

@ -46,11 +46,13 @@ unsigned long cmci_intel_adjust_timer(unsigned long interval);
bool mce_intel_cmci_poll(void); bool mce_intel_cmci_poll(void);
void mce_intel_hcpu_update(unsigned long cpu); void mce_intel_hcpu_update(unsigned long cpu);
void cmci_disable_bank(int bank); void cmci_disable_bank(int bank);
void intel_init_cmci(void);
#else #else
# define cmci_intel_adjust_timer mce_adjust_timer_default # define cmci_intel_adjust_timer mce_adjust_timer_default
static inline bool mce_intel_cmci_poll(void) { return false; } static inline bool mce_intel_cmci_poll(void) { return false; }
static inline void mce_intel_hcpu_update(unsigned long cpu) { } static inline void mce_intel_hcpu_update(unsigned long cpu) { }
static inline void cmci_disable_bank(int bank) { } static inline void cmci_disable_bank(int bank) { }
static inline void intel_init_cmci(void) { }
#endif #endif
void mce_timer_kick(unsigned long interval); void mce_timer_kick(unsigned long interval);