From: Qiuxu Zhuo qiuxu.zhuo@intel.com
mainline inclusion from mainline-v5.8-rc1 commit ce20670828c1228ecd37befbdda87a1f87a803b9 category: feature bugzilla: https://gitee.com/openeuler/kernel/issues/I47H3V CVE: NA
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commit ce20670828c1228ecd37befbdda87a1f87a803b9 upstream
Backport summary: Backport to kernel 4.19.57 for ICX-D EDAC support
The i10nm_edac driver failed to load on Ice Lake and Tremont/Jacobsville servers if their CPU stepping >= 4 and failed on Ice Lake-D servers from stepping 0. The root cause was that for Ice Lake and Tremont/Jacobsville servers with CPU stepping >=4, the offset for bus number configuration register was updated from 0xcc to 0xd0. For Ice Lake-D servers, all the steppings use the updated 0xd0 offset.
Fix the issue by using the appropriate offset for bus number configuration register according to the CPU model number and stepping.
Reported-by: Jerry Chen jerry.t.chen@intel.com Reported-and-tested-by: Jin Wen wen.jin@intel.com Signed-off-by: Qiuxu Zhuo qiuxu.zhuo@intel.com Signed-off-by: Tony Luck tony.luck@intel.com Reviewed-by: Borislav Petkov bp@suse.de Link: https://lore.kernel.org/linux-edac/20200427084022.GC11036@zn.tnic Signed-off-by: Youquan Song youquan.song@intel.com Signed-off-by: Jackie Liu liuyun01@kylinos.cn Signed-off-by: Zheng Zengkai zhengzengkai@huawei.com Reviewed-by: Xie XiuQi xiexiuqi@huawei.com Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- drivers/edac/i10nm_base.c | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-)
diff --git a/drivers/edac/i10nm_base.c b/drivers/edac/i10nm_base.c index 5a47f55f8145..1c644cc02487 100644 --- a/drivers/edac/i10nm_base.c +++ b/drivers/edac/i10nm_base.c @@ -122,16 +122,22 @@ static int i10nm_get_all_munits(void) return 0; }
-static struct res_config i10nm_cfg = { +static struct res_config i10nm_cfg0 = { .type = I10NM, .decs_did = 0x3452, .busno_cfg_offset = 0xcc, };
+static struct res_config i10nm_cfg1 = { + .type = I10NM, + .decs_did = 0x3452, + .busno_cfg_offset = 0xd0, +}; + static const struct x86_cpu_id i10nm_cpuids[] = { - { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_TREMONT_X, 0, (kernel_ulong_t)&i10nm_cfg}, - { X86_VENDOR_INTEL, 6, INTEL_FAM6_ICELAKE_X, 0, (kernel_ulong_t)&i10nm_cfg}, - { X86_VENDOR_INTEL, 6, INTEL_FAM6_ICELAKE_XEON_D, 0, (kernel_ulong_t)&i10nm_cfg}, + { X86_VENDOR_INTEL, 6, INTEL_FAM6_ATOM_TREMONT_X, 0, (kernel_ulong_t)&i10nm_cfg0}, + { X86_VENDOR_INTEL, 6, INTEL_FAM6_ICELAKE_X, 0, (kernel_ulong_t)&i10nm_cfg0}, + { X86_VENDOR_INTEL, 6, INTEL_FAM6_ICELAKE_XEON_D, 0, (kernel_ulong_t)&i10nm_cfg1}, { } }; MODULE_DEVICE_TABLE(x86cpu, i10nm_cpuids); @@ -259,6 +265,10 @@ static int __init i10nm_init(void)
cfg = (struct res_config *)id->driver_data;
+ /* Newer steppings have different offset for ATOM_TREMONT_D/ICELAKE_X */ + if (boot_cpu_data.x86_stepping >= 4) + cfg->busno_cfg_offset = 0xd0; + rc = skx_get_hi_lo(0x09a2, off, &tolm, &tohm); if (rc) return rc;