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authorYazen Ghannam <yazen.ghannam@amd.com>2019-03-25 23:33:30 +0300
committerBorislav Petkov <bp@suse.de>2019-03-27 02:13:25 +0300
commit869adc4316ea348e3c52af2494d9b1f6bd68abbd (patch)
tree5ecc28c0ca0531d9cd153d75635260ac90e188e3 /drivers/edac
parentbdcee7747f5c490297665af0e1e0fbeb4368804d (diff)
downloadlinux-869adc4316ea348e3c52af2494d9b1f6bd68abbd.tar.xz
EDAC/amd64: Set maximum channel layer size depending on family
The AMD64 EDAC module currently hardcodes the EDAC channel layer size count to two. Future AMD systems may have more channels than this. Set the EDAC channel layer size equal to the maximum number of channels possible for the system. On Family 17h and later, this is set in the num_umcs variable. Older systems will continue to use two as the default. Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: James Morse <james.morse@arm.com> Cc: Mauro Carvalho Chehab <mchehab@kernel.org> Cc: linux-edac <linux-edac@vger.kernel.org> Link: https://lkml.kernel.org/r/20190325203319.7603-1-Yazen.Ghannam@amd.com
Diffstat (limited to 'drivers/edac')
-rw-r--r--drivers/edac/amd64_edac.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/drivers/edac/amd64_edac.c b/drivers/edac/amd64_edac.c
index 81dca957fce0..54acd3a7acdc 100644
--- a/drivers/edac/amd64_edac.c
+++ b/drivers/edac/amd64_edac.c
@@ -3326,8 +3326,14 @@ static int init_one_instance(unsigned int nid)
* Always allocate two channels since we can have setups with DIMMs on
* only one channel. Also, this simplifies handling later for the price
* of a couple of KBs tops.
+ *
+ * On Fam17h+, the number of controllers may be greater than two. So set
+ * the size equal to the maximum number of UMCs.
*/
- layers[1].size = 2;
+ if (pvt->fam >= 0x17)
+ layers[1].size = num_umcs;
+ else
+ layers[1].size = 2;
layers[1].is_virt_csrow = false;
mci = edac_mc_alloc(nid, ARRAY_SIZE(layers), layers, 0);