From: Yazen Ghannam <yazen.ghannam@amd.com>

Date: Mon, 18 Dec 2017 12:37:12 +0100

Subject: x86/MCE/AMD: Define a function to get SMCA bank type

Git-commit: 11cf887728a3d1de77cc12ce247b64ef32608891

Patch-mainline: v4.16-rc1

References: bsc#1110006

Scalable MCA systems have various types of banks. The bank's type

can determine how we handle errors from it. For example, if a bank

represents a UMC (Unified Memory Controller) then we will need to

convert its address from a normalized address to a system physical

address before handling the error.

[ bp: Verify m->bank is within range and use bank pointer. ]

Signed-off-by: Yazen Ghannam <yazen.ghannam@amd.com>

Signed-off-by: Borislav Petkov <bp@suse.de>

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Link: http://lkml.kernel.org/r/20171207203955.118171-1-Yazen.Ghannam@amd.com

Acked-by: Joerg Roedel <jroedel@suse.de>

---

 arch/x86/kernel/cpu/mcheck/mce_amd.c | 14 ++++++++++++++

 1 file changed, 14 insertions(+)

diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd.c b/arch/x86/kernel/cpu/mcheck/mce_amd.c

index a38ab1fa53a2..661c4738be27 100644

--- a/arch/x86/kernel/cpu/mcheck/mce_amd.c

+++ b/arch/x86/kernel/cpu/mcheck/mce_amd.c

@@ -110,6 +110,20 @@ const char *smca_get_long_name(enum smca_bank_types t)

 }

 EXPORT_SYMBOL_GPL(smca_get_long_name);

+static enum smca_bank_types smca_get_bank_type(struct mce *m)

+{

+	struct smca_bank *b;

+

+	if (m->bank >= N_SMCA_BANK_TYPES)

+		return N_SMCA_BANK_TYPES;

+

+	b = &smca_banks[m->bank];

+	if (!b->hwid)

+		return N_SMCA_BANK_TYPES;

+

+	return b->hwid->bank_type;

+}

+

 static struct smca_hwid smca_hwid_mcatypes[] = {

 	/* { bank_type, hwid_mcatype, xec_bitmap } */