diff options
| author | Ingo Molnar <mingo@elte.hu> | 2007-02-19 14:37:47 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2007-03-04 11:12:40 +0200 |
| commit | 102d8325a1d2f266d3d0a03fdde948544e72c12d (patch) | |
| tree | 21024c8b9b2b702c79200343e26f14f075da0479 /drivers/kvm/svm.c | |
| parent | 5972e9535e94bf875eb8eab8a667ba04c7583874 (diff) | |
KVM: add MSR based hypercall API
This adds a special MSR based hypercall API to KVM. This is to be
used by paravirtual kernels and virtual drivers.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'drivers/kvm/svm.c')
| -rw-r--r-- | drivers/kvm/svm.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/kvm/svm.c b/drivers/kvm/svm.c index 72cac0488b31..f6e86528f031 100644 --- a/drivers/kvm/svm.c +++ b/drivers/kvm/svm.c @@ -1669,6 +1669,18 @@ static int is_disabled(void) return 0; } +static void +svm_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall) +{ + /* + * Patch in the VMMCALL instruction: + */ + hypercall[0] = 0x0f; + hypercall[1] = 0x01; + hypercall[2] = 0xd9; + hypercall[3] = 0xc3; +} + static struct kvm_arch_ops svm_arch_ops = { .cpu_has_kvm_support = has_svm, .disabled_by_bios = is_disabled, @@ -1717,6 +1729,7 @@ static struct kvm_arch_ops svm_arch_ops = { .run = svm_vcpu_run, .skip_emulated_instruction = skip_emulated_instruction, .vcpu_setup = svm_vcpu_setup, + .patch_hypercall = svm_patch_hypercall, }; static int __init svm_init(void) |