Commit 3e0fdec8 authored by Borislav Petkov's avatar Borislav Petkov
Browse files

x86/mce/amd, edac: Remove report_gart_errors



... because no one should be interested in spurious MCEs anyway. Make
the filtering unconditional and move it to amd_filter_mce().

Signed-off-by: default avatarBorislav Petkov <bp@suse.de>
Tested-by: default avatarTony Luck <tony.luck@intel.com>
Link: https://lkml.kernel.org/r/20200407163414.18058-2-bp@alien8.de
parent a037f3ca
Loading
Loading
Loading
Loading
+2 −1
Original line number Diff line number Diff line
@@ -127,6 +127,8 @@
#define MSR_AMD64_SMCA_MCx_DEADDR(x)	(MSR_AMD64_SMCA_MC0_DEADDR + 0x10*(x))
#define MSR_AMD64_SMCA_MCx_MISCy(x, y)	((MSR_AMD64_SMCA_MC0_MISC1 + y) + (0x10*(x)))

#define XEC(x, mask)			(((x) >> 16) & mask)

/*
 * This structure contains all data related to the MCE log.  Also
 * carries a signature to make it easier to find from external
@@ -347,5 +349,4 @@ umc_normaddr_to_sysaddr(u64 norm_addr, u16 nid, u8 umc, u64 *sys_addr) { return
#endif

static inline void mce_hygon_feature_init(struct cpuinfo_x86 *c)	{ return mce_amd_feature_init(c); }

#endif /* _ASM_X86_MCE_H */
+7 −2
Original line number Diff line number Diff line
@@ -577,14 +577,19 @@ bool amd_filter_mce(struct mce *m)
{
	enum smca_bank_types bank_type = smca_get_bank_type(m->bank);
	struct cpuinfo_x86 *c = &boot_cpu_data;
	u8 xec = (m->status >> 16) & 0x3F;

	/* See Family 17h Models 10h-2Fh Erratum #1114. */
	if (c->x86 == 0x17 &&
	    c->x86_model >= 0x10 && c->x86_model <= 0x2F &&
	    bank_type == SMCA_IF && xec == 10)
	    bank_type == SMCA_IF && XEC(m->status, 0x3f) == 10)
		return true;

	/* NB GART TLB error reporting is disabled by default. */
	if (c->x86 < 0x17) {
		if (m->bank == 4 && XEC(m->status, 0x1f) == 0x5)
			return true;
	}

	return false;
}

+0 −8
Original line number Diff line number Diff line
@@ -4,9 +4,6 @@

static struct edac_pci_ctl_info *pci_ctl;

static int report_gart_errors;
module_param(report_gart_errors, int, 0644);

/*
 * Set by command line parameter. If BIOS has enabled the ECC, this override is
 * cleared to prevent re-enabling the hardware by this driver.
@@ -3681,9 +3678,6 @@ static int __init amd64_edac_init(void)
	}

	/* register stuff with EDAC MCE */
	if (report_gart_errors)
		amd_report_gart_errors(true);

	if (boot_cpu_data.x86 >= 0x17)
		amd_register_ecc_decoder(decode_umc_error);
	else
@@ -3718,8 +3712,6 @@ static void __exit amd64_edac_exit(void)
		edac_pci_release_generic_ctl(pci_ctl);

	/* unregister from EDAC MCE */
	amd_report_gart_errors(false);

	if (boot_cpu_data.x86 >= 0x17)
		amd_unregister_ecc_decoder(decode_umc_error);
	else
+0 −24
Original line number Diff line number Diff line
@@ -10,15 +10,8 @@ static struct amd_decoder_ops fam_ops;

static u8 xec_mask	 = 0xf;

static bool report_gart_errors;
static void (*decode_dram_ecc)(int node_id, struct mce *m);

void amd_report_gart_errors(bool v)
{
	report_gart_errors = v;
}
EXPORT_SYMBOL_GPL(amd_report_gart_errors);

void amd_register_ecc_decoder(void (*f)(int, struct mce *))
{
	decode_dram_ecc = f;
@@ -1030,20 +1023,6 @@ static inline void amd_decode_err_code(u16 ec)
	pr_cont("\n");
}

/*
 * Filter out unwanted MCE signatures here.
 */
static bool ignore_mce(struct mce *m)
{
	/*
	 * NB GART TLB error reporting is disabled by default.
	 */
	if (m->bank == 4 && XEC(m->status, 0x1f) == 0x5 && !report_gart_errors)
		return true;

	return false;
}

static const char *decode_error_status(struct mce *m)
{
	if (m->status & MCI_STATUS_UC) {
@@ -1067,9 +1046,6 @@ amd_decode_mce(struct notifier_block *nb, unsigned long val, void *data)
	unsigned int fam = x86_family(m->cpuid);
	int ecc;

	if (ignore_mce(m))
		return NOTIFY_STOP;

	pr_emerg(HW_ERR "%s\n", decode_error_status(m));

	pr_emerg(HW_ERR "CPU:%d (%x:%x:%x) MC%d_STATUS[%s|%s|%s|%s|%s",
+0 −2
Original line number Diff line number Diff line
@@ -7,7 +7,6 @@
#include <asm/mce.h>

#define EC(x)				((x) & 0xffff)
#define XEC(x, mask)			(((x) >> 16) & mask)

#define LOW_SYNDROME(x)			(((x) >> 15) & 0xff)
#define HIGH_SYNDROME(x)		(((x) >> 24) & 0xff)
@@ -77,7 +76,6 @@ struct amd_decoder_ops {
	bool (*mc2_mce)(u16, u8);
};

void amd_report_gart_errors(bool);
void amd_register_ecc_decoder(void (*f)(int, struct mce *));
void amd_unregister_ecc_decoder(void (*f)(int, struct mce *));