From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Nadav Har'El" Subject: [PATCH 12/31] nVMX: Implement VMPTRLD Date: Wed, 25 May 2011 23:07:29 +0300 Message-ID: <201105252007.p4PK7TMW011206@rice.haifa.ibm.com> References: <1306353651-nyh@il.ibm.com> Cc: avi@redhat.com To: kvm@vger.kernel.org Return-path: Received: from mtagate4.uk.ibm.com ([194.196.100.164]:45532 "EHLO mtagate4.uk.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751743Ab1EYUHc (ORCPT ); Wed, 25 May 2011 16:07:32 -0400 Received: from d06nrmr1307.portsmouth.uk.ibm.com (d06nrmr1307.portsmouth.uk.ibm.com [9.149.38.129]) by mtagate4.uk.ibm.com (8.13.1/8.13.1) with ESMTP id p4PK7Vb1014802 for ; Wed, 25 May 2011 20:07:31 GMT Received: from d06av03.portsmouth.uk.ibm.com (d06av03.portsmouth.uk.ibm.com [9.149.37.213]) by d06nrmr1307.portsmouth.uk.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id p4PK7VNl2457846 for ; Wed, 25 May 2011 21:07:31 +0100 Received: from d06av03.portsmouth.uk.ibm.com (localhost.localdomain [127.0.0.1]) by d06av03.portsmouth.uk.ibm.com (8.14.4/8.13.1/NCO v10.0 AVout) with ESMTP id p4PK7UQD005796 for ; Wed, 25 May 2011 14:07:31 -0600 Sender: kvm-owner@vger.kernel.org List-ID: This patch implements the VMPTRLD instruction. Signed-off-by: Nadav Har'El --- arch/x86/kvm/vmx.c | 62 ++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 61 insertions(+), 1 deletion(-) --- .before/arch/x86/kvm/vmx.c 2011-05-25 22:40:57.000000000 +0300 +++ .after/arch/x86/kvm/vmx.c 2011-05-25 22:40:57.000000000 +0300 @@ -4876,6 +4876,66 @@ 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 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 @@ -4899,7 +4959,7 @@ 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,