KVM: Provide callback to get/set control registers in emulator ops.
Use this callback instead of directly call kvm function. Also rename
realmode_(set|get)_cr to emulator_(set|get)_cr since function has nothing
to do with real mode.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 35db4f0..94a2975 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3423,12 +3423,70 @@
}
EXPORT_SYMBOL_GPL(kvm_report_emulation_failure);
+static u64 mk_cr_64(u64 curr_cr, u32 new_val)
+{
+ return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
+}
+
+static unsigned long emulator_get_cr(int cr, struct kvm_vcpu *vcpu)
+{
+ unsigned long value;
+
+ switch (cr) {
+ case 0:
+ value = kvm_read_cr0(vcpu);
+ break;
+ case 2:
+ value = vcpu->arch.cr2;
+ break;
+ case 3:
+ value = vcpu->arch.cr3;
+ break;
+ case 4:
+ value = kvm_read_cr4(vcpu);
+ break;
+ case 8:
+ value = kvm_get_cr8(vcpu);
+ break;
+ default:
+ vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr);
+ return 0;
+ }
+
+ return value;
+}
+
+static void emulator_set_cr(int cr, unsigned long val, struct kvm_vcpu *vcpu)
+{
+ switch (cr) {
+ case 0:
+ kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val));
+ break;
+ case 2:
+ vcpu->arch.cr2 = val;
+ break;
+ case 3:
+ kvm_set_cr3(vcpu, val);
+ break;
+ case 4:
+ kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val));
+ break;
+ case 8:
+ kvm_set_cr8(vcpu, val & 0xfUL);
+ break;
+ default:
+ vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr);
+ }
+}
+
static struct x86_emulate_ops emulate_ops = {
.read_std = kvm_read_guest_virt_system,
.fetch = kvm_fetch_guest_virt,
.read_emulated = emulator_read_emulated,
.write_emulated = emulator_write_emulated,
.cmpxchg_emulated = emulator_cmpxchg_emulated,
+ .get_cr = emulator_get_cr,
+ .set_cr = emulator_set_cr,
};
static void cache_all_regs(struct kvm_vcpu *vcpu)
@@ -4026,11 +4084,6 @@
return __emulator_write_emulated(rip, instruction, 3, vcpu, false);
}
-static u64 mk_cr_64(u64 curr_cr, u32 new_val)
-{
- return (curr_cr & ~((1ULL << 32) - 1)) | new_val;
-}
-
void realmode_lgdt(struct kvm_vcpu *vcpu, u16 limit, unsigned long base)
{
struct desc_ptr dt = { limit, base };
@@ -4052,57 +4105,6 @@
*rflags = kvm_get_rflags(vcpu);
}
-unsigned long realmode_get_cr(struct kvm_vcpu *vcpu, int cr)
-{
- unsigned long value;
-
- switch (cr) {
- case 0:
- value = kvm_read_cr0(vcpu);
- break;
- case 2:
- value = vcpu->arch.cr2;
- break;
- case 3:
- value = vcpu->arch.cr3;
- break;
- case 4:
- value = kvm_read_cr4(vcpu);
- break;
- case 8:
- value = kvm_get_cr8(vcpu);
- break;
- default:
- vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr);
- return 0;
- }
-
- return value;
-}
-
-void realmode_set_cr(struct kvm_vcpu *vcpu, int cr, unsigned long val)
-{
- switch (cr) {
- case 0:
- kvm_set_cr0(vcpu, mk_cr_64(kvm_read_cr0(vcpu), val));
- break;
- case 2:
- vcpu->arch.cr2 = val;
- break;
- case 3:
- kvm_set_cr3(vcpu, val);
- break;
- case 4:
- kvm_set_cr4(vcpu, mk_cr_64(kvm_read_cr4(vcpu), val));
- break;
- case 8:
- kvm_set_cr8(vcpu, val & 0xfUL);
- break;
- default:
- vcpu_printf(vcpu, "%s: unexpected cr %u\n", __func__, cr);
- }
-}
-
static int move_to_next_stateful_cpuid_entry(struct kvm_vcpu *vcpu, int i)
{
struct kvm_cpuid_entry2 *e = &vcpu->arch.cpuid_entries[i];