This patch implements the VMPTRLD instruction.
Signed-off-by: Nadav Har'El <n...@il.ibm.com>
---
arch/x86/kvm/vmx.c | 64 ++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 63 insertions(+), 1 deletion(-)
--- .before/arch/x86/kvm/vmx.c 2011-01-26 18:06:04.000000000 +0200
+++ .after/arch/x86/kvm/vmx.c 2011-01-26 18:06:04.000000000 +0200
@@ -4643,6 +4643,68 @@ static int handle_vmclear(struct kvm_vcp
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 vmcs12_addr;
+
+ 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(gva, &vmcs12_addr, sizeof(vmcs12_addr),
+ vcpu, NULL)) {
+ kvm_queue_exception(vcpu, PF_VECTOR);
+ return 1;
+ }
+
+ if (!IS_ALIGNED(vmcs12_addr, PAGE_SIZE)) {
+ nested_vmx_failValid(vcpu, VMXERR_VMPTRLD_INVALID_ADDRESS);
+ skip_emulated_instruction(vcpu);
+ return 1;
+ }
+
+ if (vmx->nested.current_vmptr != vmcs12_addr) {
+ struct vmcs12 *new_vmcs12;
+ struct page *page;
+ page = nested_get_page(vcpu, vmcs12_addr);
+ 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 = vmcs12_addr;
+ vmx->nested.current_vmcs12 = new_vmcs12;
+ vmx->nested.current_vmcs12_page = page;
+
+ if (nested_create_current_vmcs(vcpu))
+ return -ENOMEM;
+ }
+
+ 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
@@ -4666,7 +4728,7 @@ static int (*kvm_vmx_exit_handlers[])(st
[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,
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