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EDAC, amd64: Determine EDAC capabilities on Fam17h systems

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We need to determine the EDAC capabilities from all UMCs on the node. We
should only check UMCs that are enabled and make sure they all agree.

Signed-off-by: Yazen Ghannam <Yazen.Ghannam@amd.com>
Cc: Aravind Gopalakrishnan <aravindksg.lkml@gmail.com>
Cc: linux-edac <linux-edac@vger.kernel.org>
Cc: x86-ml <x86@kernel.org>
Link: http://lkml.kernel.org/r/1479423463-8536-15-git-send-email-Yazen.Ghannam@amd.com
Signed-off-by: Borislav Petkov <bp@suse.de>
This commit is contained in:
Yazen Ghannam 2016-11-17 17:57:40 -05:00 committed by Borislav Petkov
parent 2d09d8f301
commit d27f3a348e
1 changed files with 24 additions and 6 deletions
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20
drivers/edac/amd64_edac.c
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@ -715,15 +715,33 @@ static int get_channel_from_ecc_syndrome(struct mem_ctl_info *, u16);
*/
static unsigned long determine_edac_cap(struct amd64_pvt *pvt)
{
u8 bit;
unsigned long edac_cap = EDAC_FLAG_NONE;
u8 bit;
if (pvt->umc) {
u8 i, umc_en_mask = 0, dimm_ecc_en_mask = 0;
for (i = 0; i < NUM_UMCS; i++) {
if (!(pvt->umc[i].sdp_ctrl & UMC_SDP_INIT))
continue;
umc_en_mask |= BIT(i);
/* UMC Configuration bit 12 (DimmEccEn) */
if (pvt->umc[i].umc_cfg & BIT(12))
dimm_ecc_en_mask |= BIT(i);
}
if (umc_en_mask == dimm_ecc_en_mask)
edac_cap = EDAC_FLAG_SECDED;
} else {
bit = (pvt->fam > 0xf || pvt->ext_model >= K8_REV_F)
? 19
: 17;
if (pvt->dclr0 & BIT(bit))
edac_cap = EDAC_FLAG_SECDED;
}
return edac_cap;
}