x86/vMCE: Add AMD support

Add vMCE support for AMD. Add vmce namespace to Intel specific vMCE MSR
functions. Move vMCE prototypes from mce.h to vmce.h.

Signed-off-by: Christoph Egger <Christoph.Egger@amd.com>

- fix inverted return values from vmce_amd_{rd,wr}msr()
- remove bogus printk()-s from those functions

Signed-off-by: Jan Beulich <jbeulich@suse.com>
Committed-by: Jan Beulich <jbeulich@suse.com>

xen/arch/x86/cpu/mcheck/amd_f10.c

@@ -104,3 +104,28 @@ enum mcheck_type amd_f10_mcheck_init(struct cpuinfo_x86 *c)
 
 	return mcheck_amd_famXX;
 }
+
+/* amd specific MCA MSR */
+int vmce_amd_wrmsr(struct vcpu *v, uint32_t msr, uint64_t val)
+{
+        switch (msr) {
+        case MSR_F10_MC4_MISC1:
+        case MSR_F10_MC4_MISC2:
+        case MSR_F10_MC4_MISC3:
+                break;
+        }
+
+        return 1;
+}
+
+int vmce_amd_rdmsr(const struct vcpu *v, uint32_t msr, uint64_t *val)
+{
+        switch (msr) {
+        case MSR_F10_MC4_MISC1:
+        case MSR_F10_MC4_MISC2:
+        case MSR_F10_MC4_MISC3:
+                break;
+        }
+
+        return 1;
+}

xen/arch/x86/cpu/mcheck/amd_nonfatal.c

@@ -64,6 +64,7 @@
 #include <asm/msr.h>
 
 #include "mce.h"
+#include "vmce.h"
 
 static struct timer mce_timer;
 

xen/arch/x86/cpu/mcheck/mce.c

@@ -25,6 +25,7 @@
 #include "mce.h"
 #include "barrier.h"
 #include "util.h"
+#include "vmce.h"
 
 bool_t __read_mostly mce_disabled;
 invbool_param("mce", mce_disabled);

xen/arch/x86/cpu/mcheck/mce.h

@@ -49,15 +49,9 @@ void intel_mcheck_timer(struct cpuinfo_x86 *c);
 void mce_intel_feature_init(struct cpuinfo_x86 *c);
 void amd_nonfatal_mcheck_init(struct cpuinfo_x86 *c);
 
-int is_vmce_ready(struct mcinfo_bank *bank, struct domain *d);
-int unmmap_broken_page(struct domain *d, mfn_t mfn, unsigned long gfn);
-
-u64 mce_cap_init(void);
+uint64_t mce_cap_init(void);
 extern unsigned int firstbank;
 
-int intel_mce_rdmsr(const struct vcpu *, uint32_t msr, uint64_t *val);
-int intel_mce_wrmsr(struct vcpu *, uint32_t msr, uint64_t val);
-
 struct mcinfo_extended *intel_get_extended_msrs(
     struct mcinfo_global *mig, struct mc_info *mi);
 
@@ -69,9 +63,6 @@ void mc_panic(char *s);
 void x86_mc_get_cpu_info(unsigned, uint32_t *, uint16_t *, uint16_t *,
 			 uint32_t *, uint32_t *, uint32_t *, uint32_t *);
 
-#define dom0_vmce_enabled() (dom0 && dom0->max_vcpus && dom0->vcpu[0] \
-	&& guest_enabled_event(dom0->vcpu[0], VIRQ_MCA))
-
 /* Register a handler for machine check exceptions. */
 typedef void (*x86_mce_vector_t)(struct cpu_user_regs *, long);
 extern void x86_mce_vector_register(x86_mce_vector_t);
@@ -166,10 +157,6 @@ void *x86_mcinfo_add(struct mc_info *mi, void *mcinfo);
 void *x86_mcinfo_reserve(struct mc_info *mi, int size);
 void x86_mcinfo_dump(struct mc_info *mi);
 
-int fill_vmsr_data(struct mcinfo_bank *mc_bank, struct domain *d,
-    uint64_t gstatus);
-int inject_vmce(struct domain *d, int vcpu);
-
 static inline int mce_vendor_bank_msr(const struct vcpu *v, uint32_t msr)
 {
     switch (boot_cpu_data.x86_vendor) {

xen/arch/x86/cpu/mcheck/mce_intel.c

@@ -18,6 +18,7 @@
 #include "x86_mca.h"
 #include "barrier.h"
 #include "util.h"
+#include "vmce.h"
 
 DEFINE_PER_CPU(struct mca_banks *, mce_banks_owned);
 DEFINE_PER_CPU(struct mca_banks *, no_cmci_banks);
@@ -980,7 +981,7 @@ enum mcheck_type intel_mcheck_init(struct cpuinfo_x86 *c, bool_t bsp)
 }
 
 /* intel specific MCA MSR */
-int intel_mce_wrmsr(struct vcpu *v, uint32_t msr, uint64_t val)
+int vmce_intel_wrmsr(struct vcpu *v, uint32_t msr, uint64_t val)
 {
     unsigned int bank = msr - MSR_IA32_MC0_CTL2;
 
@@ -993,7 +994,7 @@ int intel_mce_wrmsr(struct vcpu *v, uint32_t msr, uint64_t val)
     return 1;
 }
 
-int intel_mce_rdmsr(const struct vcpu *v, uint32_t msr, uint64_t *val)
+int vmce_intel_rdmsr(const struct vcpu *v, uint32_t msr, uint64_t *val)
 {
     unsigned int bank = msr - MSR_IA32_MC0_CTL2;
 

xen/arch/x86/cpu/mcheck/non-fatal.c

@@ -21,6 +21,7 @@
 #include <asm/msr.h>
 
 #include "mce.h"
+#include "vmce.h"
 
 DEFINE_PER_CPU(struct mca_banks *, poll_bankmask);
 static struct timer mce_timer;

xen/arch/x86/cpu/mcheck/vmce.c

@@ -33,8 +33,10 @@
 #include <asm/system.h>
 #include <asm/msr.h>
 #include <asm/p2m.h>
+
 #include "mce.h"
 #include "x86_mca.h"
+#include "vmce.h"
 
 /*
  * MCG_SER_P:  software error recovery supported
@@ -143,7 +145,10 @@ static int bank_mce_rdmsr(const struct vcpu *v, uint32_t msr, uint64_t *val)
         switch ( boot_cpu_data.x86_vendor )
         {
         case X86_VENDOR_INTEL:
-            ret = intel_mce_rdmsr(v, msr, val);
+            ret = vmce_intel_rdmsr(v, msr, val);
+            break;
+        case X86_VENDOR_AMD:
+            ret = vmce_amd_rdmsr(v, msr, val);
             break;
         default:
             ret = 0;
@@ -200,7 +205,7 @@ int vmce_rdmsr(uint32_t msr, uint64_t *val)
  * For historic version reason, bank number may greater than GUEST_MC_BANK_NUM,
  * when migratie from old vMCE version to new vMCE.
  */
-static int bank_mce_wrmsr(struct vcpu *v, u32 msr, u64 val)
+static int bank_mce_wrmsr(struct vcpu *v, uint32_t msr, uint64_t val)
 {
     int ret = 1;
     unsigned int bank = (msr - MSR_IA32_MC0_CTL) / 4;
@@ -238,7 +243,10 @@ static int bank_mce_wrmsr(struct vcpu *v, u32 msr, u64 val)
         switch ( boot_cpu_data.x86_vendor )
         {
         case X86_VENDOR_INTEL:
-            ret = intel_mce_wrmsr(v, msr, val);
+            ret = vmce_intel_wrmsr(v, msr, val);
+            break;
+        case X86_VENDOR_AMD:
+            ret = vmce_amd_wrmsr(v, msr, val);
             break;
         default:
             ret = 0;
@@ -255,7 +263,7 @@ static int bank_mce_wrmsr(struct vcpu *v, u32 msr, u64 val)
  * = 0: Not handled, should be handled by other components
  * > 0: Success
  */
-int vmce_wrmsr(u32 msr, u64 val)
+int vmce_wrmsr(uint32_t msr, uint64_t val)
 {
     struct vcpu *cur = current;
     int ret = 1;

xen/arch/x86/cpu/mcheck/vmce.h

@@ -0,0 +1,23 @@
+#ifndef _MCHECK_VMCE_H
+#define _MCHECK_VMCE_H
+
+#include "x86_mca.h"
+
+int vmce_init(struct cpuinfo_x86 *c);
+
+#define dom0_vmce_enabled() (dom0 && dom0->max_vcpus && dom0->vcpu[0] \
+        && guest_enabled_event(dom0->vcpu[0], VIRQ_MCA))
+
+int is_vmce_ready(struct mcinfo_bank *bank, struct domain *d);
+int unmmap_broken_page(struct domain *d, mfn_t mfn, unsigned long gfn);
+
+int vmce_intel_rdmsr(const struct vcpu *, uint32_t msr, uint64_t *val);
+int vmce_intel_wrmsr(struct vcpu *, uint32_t msr, uint64_t val);
+int vmce_amd_rdmsr(const struct vcpu *, uint32_t msr, uint64_t *val);
+int vmce_amd_wrmsr(struct vcpu *, uint32_t msr, uint64_t val);
+
+int fill_vmsr_data(struct mcinfo_bank *mc_bank, struct domain *d,
+    uint64_t gstatus);
+int inject_vmce(struct domain *d, int vcpu);
+
+#endif