[PATCH] KVM: Move common msr handling to arch independent code

Signed-off-by: Avi Kivity <avi@qumranet.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 69 insertions, 2 deletions

diff --git a/drivers/kvm/kvm_main.c b/drivers/kvm/kvm_main.c
index 06314071c6d2..567121d9142a 100644
--- a/drivers/kvm/kvm_main.c
+++ b/drivers/kvm/kvm_main.c
@@ -1103,6 +1103,47 @@ void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val,
         }
 }
 
+int kvm_get_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 *pdata)
+{
+        u64 data;
+
+        switch (msr) {
+        case 0xc0010010: /* SYSCFG */
+        case 0xc0010015: /* HWCR */
+        case MSR_IA32_PLATFORM_ID:
+        case MSR_IA32_P5_MC_ADDR:
+        case MSR_IA32_P5_MC_TYPE:
+        case MSR_IA32_MC0_CTL:
+        case MSR_IA32_MCG_STATUS:
+        case MSR_IA32_MCG_CAP:
+        case MSR_IA32_MC0_MISC:
+        case MSR_IA32_MC0_MISC+4:
+        case MSR_IA32_MC0_MISC+8:
+        case MSR_IA32_MC0_MISC+12:
+        case MSR_IA32_MC0_MISC+16:
+        case MSR_IA32_UCODE_REV:
+                /* MTRR registers */
+        case 0xfe:
+        case 0x200 ... 0x2ff:
+                data = 0;
+                break;
+        case MSR_IA32_APICBASE:
+                data = vcpu->apic_base;
+                break;
+#ifdef CONFIG_X86_64
+        case MSR_EFER:
+                data = vcpu->shadow_efer;
+                break;
+#endif
+        default:
+                printk(KERN_ERR "kvm: unhandled rdmsr: 0x%x\n", msr);
+                return 1;
+        }
+        *pdata = data;
+        return 0;
+}
+EXPORT_SYMBOL_GPL(kvm_get_msr_common);
+
 /*
  * Reads an msr value (of 'msr_index') into 'pdata'.
  * Returns 0 on success, non-0 otherwise.
@@ -1115,7 +1156,7 @@ static int get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
 
 #ifdef CONFIG_X86_64
 
-void set_efer(struct kvm_vcpu *vcpu, u64 efer)
+static void set_efer(struct kvm_vcpu *vcpu, u64 efer)
 {
         if (efer & EFER_RESERVED_BITS) {
                 printk(KERN_DEBUG "set_efer: 0x%llx #GP, reserved bits\n",
@@ -1138,10 +1179,36 @@ void set_efer(struct kvm_vcpu *vcpu, u64 efer)
 
         vcpu->shadow_efer = efer;
 }
-EXPORT_SYMBOL_GPL(set_efer);
 
 #endif
 
+int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data)
+{
+        switch (msr) {
+#ifdef CONFIG_X86_64
+        case MSR_EFER:
+                set_efer(vcpu, data);
+                break;
+#endif
+        case MSR_IA32_MC0_STATUS:
+                printk(KERN_WARNING "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n",
+                       __FUNCTION__, data);
+                break;
+        case MSR_IA32_UCODE_REV:
+        case MSR_IA32_UCODE_WRITE:
+        case 0x200 ... 0x2ff: /* MTRRs */
+                break;
+        case MSR_IA32_APICBASE:
+                vcpu->apic_base = data;
+                break;
+        default:
+                printk(KERN_ERR "kvm: unhandled wrmsr: 0x%x\n", msr);
+                return 1;
+        }
+        return 0;
+}
+EXPORT_SYMBOL_GPL(kvm_set_msr_common);
+
 /*
  * Writes msr value into into the appropriate "register".
  * Returns 0 on success, non-0 otherwise.