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| author | Ingo Molnar | 2007-02-19 13:37:47 +0100 |
|---|---|---|
| committer | Avi Kivity | 2007-03-04 10:12:40 +0100 |
| commit | 102d8325a1d2f266d3d0a03fdde948544e72c12d (patch) | |
| tree | 21024c8b9b2b702c79200343e26f14f075da0479 /drivers/kvm/vmx.c | |
| parent | KVM: Use page_private()/set_page_private() apis (diff) | |
| download | kernel-qcow2-linux-102d8325a1d2f266d3d0a03fdde948544e72c12d.tar.gz kernel-qcow2-linux-102d8325a1d2f266d3d0a03fdde948544e72c12d.tar.xz kernel-qcow2-linux-102d8325a1d2f266d3d0a03fdde948544e72c12d.zip | |
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/vmx.c')
| -rw-r--r-- | drivers/kvm/vmx.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/kvm/vmx.c b/drivers/kvm/vmx.c index d1198e2b2b5d..0198d400037f 100644 --- a/drivers/kvm/vmx.c +++ b/drivers/kvm/vmx.c @@ -1469,6 +1469,18 @@ static int handle_io(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) return 0; } +static void +vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall) +{ + /* + * Patch in the VMCALL instruction: + */ + hypercall[0] = 0x0f; + hypercall[1] = 0x01; + hypercall[2] = 0xc1; + hypercall[3] = 0xc3; +} + static int handle_cr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) { u64 exit_qualification; @@ -2064,6 +2076,7 @@ static struct kvm_arch_ops vmx_arch_ops = { .run = vmx_vcpu_run, .skip_emulated_instruction = skip_emulated_instruction, .vcpu_setup = vmx_vcpu_setup, + .patch_hypercall = vmx_patch_hypercall, }; static int __init vmx_init(void) |