xen/mcelog: drop __MC_MSR_MCGCAP

It has never been part of Xen's public interface, and there's therefore no guarantee for MCG_CAP's value to always be present in array entry 0. Signed-off-by: Jan Beulich <[email protected]> Reviewed-by: Boris Ostrovsky <[email protected]> Signed-off-by: Juergen Gross <[email protected]>
berg · Nov 14, 2019 · ca8ffda · ca8ffda
1 parent fa6614d
commit ca8ffda
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Showing 2 changed files with 7 additions and 3 deletions.
diff --git a/drivers/xen/mcelog.c b/drivers/xen/mcelog.c
@@ -222,7 +222,7 @@ static int convert_log(struct mc_info *mi)
 	struct mcinfo_global *mc_global;
 	struct mcinfo_bank *mc_bank;
 	struct xen_mce m;
-	uint32_t i;
+	unsigned int i, j;
 
 	mic = NULL;
 	x86_mcinfo_lookup(&mic, mi, MC_TYPE_GLOBAL);
@@ -248,7 +248,12 @@ static int convert_log(struct mc_info *mi)
 	m.socketid = g_physinfo[i].mc_chipid;
 	m.cpu = m.extcpu = g_physinfo[i].mc_cpunr;
 	m.cpuvendor = (__u8)g_physinfo[i].mc_vendor;
-	m.mcgcap = g_physinfo[i].mc_msrvalues[__MC_MSR_MCGCAP].value;
+	for (j = 0; j < g_physinfo[i].mc_nmsrvals; ++j)
+		switch (g_physinfo[i].mc_msrvalues[j].reg) {
+		case MSR_IA32_MCG_CAP:
+			m.mcgcap = g_physinfo[i].mc_msrvalues[j].value;
+			break;
+		}
 
 	mic = NULL;
 	x86_mcinfo_lookup(&mic, mi, MC_TYPE_BANK);

diff --git a/include/xen/interface/xen-mca.h b/include/xen/interface/xen-mca.h
@@ -183,7 +183,6 @@ struct mc_info {
 DEFINE_GUEST_HANDLE_STRUCT(mc_info);
 
 #define __MC_MSR_ARRAYSIZE 8
-#define __MC_MSR_MCGCAP 0
 #define __MC_NMSRS 1
 #define MC_NCAPS 7
 struct mcinfo_logical_cpu {