kpriv/linux-hardened
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

EDAC, amd64: Determine EDAC capabilities on Fam17h systems

Browse source 
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
Show stats Download patch file Download diff file Expand all files Collapse all files

30
drivers/edac/amd64_edac.c
View file

@ -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;
bit = (pvt->fam > 0xf || pvt->ext_model >= K8_REV_F)
? 19
: 17;
if (pvt->umc) {
u8 i, umc_en_mask = 0, dimm_ecc_en_mask = 0;
if (pvt->dclr0 & BIT(bit))
edac_cap = EDAC_FLAG_SECDED;
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;
}