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KVM: nVMX: Implement VMPTRLD

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This patch implements the VMPTRLD instruction.

Signed-off-by: Nadav Har'El <nyh@il.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Nadav Har'El 2011-05-25 23:07:29 +03:00 committed by Avi Kivity
parent 27d6c86521
commit 63846663ea
1 changed files with 61 additions and 1 deletions
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62
arch/x86/kvm/vmx.c
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@ -4877,6 +4877,66 @@ static int handle_vmclear(struct kvm_vcpu *vcpu)
return 1;
}
/* Emulate the VMPTRLD instruction */
static int handle_vmptrld(struct kvm_vcpu *vcpu)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
gva_t gva;
gpa_t vmptr;
struct x86_exception e;
if (!nested_vmx_check_permission(vcpu))
return 1;
if (get_vmx_mem_address(vcpu, vmcs_readl(EXIT_QUALIFICATION),
vmcs_read32(VMX_INSTRUCTION_INFO), &gva))
return 1;
if (kvm_read_guest_virt(&vcpu->arch.emulate_ctxt, gva, &vmptr,
sizeof(vmptr), &e)) {
kvm_inject_page_fault(vcpu, &e);
return 1;
}
if (!IS_ALIGNED(vmptr, PAGE_SIZE)) {
nested_vmx_failValid(vcpu, VMXERR_VMPTRLD_INVALID_ADDRESS);
skip_emulated_instruction(vcpu);
return 1;
}
if (vmx->nested.current_vmptr != vmptr) {
struct vmcs12 *new_vmcs12;
struct page *page;
page = nested_get_page(vcpu, vmptr);
if (page == NULL) {
nested_vmx_failInvalid(vcpu);
skip_emulated_instruction(vcpu);
return 1;
}
new_vmcs12 = kmap(page);
if (new_vmcs12->revision_id != VMCS12_REVISION) {
kunmap(page);
nested_release_page_clean(page);
nested_vmx_failValid(vcpu,
VMXERR_VMPTRLD_INCORRECT_VMCS_REVISION_ID);
skip_emulated_instruction(vcpu);
return 1;
}
if (vmx->nested.current_vmptr != -1ull) {
kunmap(vmx->nested.current_vmcs12_page);
nested_release_page(vmx->nested.current_vmcs12_page);
}
vmx->nested.current_vmptr = vmptr;
vmx->nested.current_vmcs12 = new_vmcs12;
vmx->nested.current_vmcs12_page = page;
}
nested_vmx_succeed(vcpu);
skip_emulated_instruction(vcpu);
return 1;
}
/*
* The exit handlers return 1 if the exit was handled fully and guest execution
* may resume. Otherwise they set the kvm_run parameter to indicate what needs
@ -4900,7 +4960,7 @@ static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu) = {
[EXIT_REASON_VMCALL] = handle_vmcall,
[EXIT_REASON_VMCLEAR] = handle_vmclear,
[EXIT_REASON_VMLAUNCH] = handle_vmx_insn,
[EXIT_REASON_VMPTRLD] = handle_vmx_insn,
[EXIT_REASON_VMPTRLD] = handle_vmptrld,
[EXIT_REASON_VMPTRST] = handle_vmx_insn,
[EXIT_REASON_VMREAD] = handle_vmx_insn,
[EXIT_REASON_VMRESUME] = handle_vmx_insn,