From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Nadav Har'El" Subject: [PATCH 10/24] Implement VMPTRLD Date: Sun, 13 Jun 2010 15:27:41 +0300 Message-ID: <201006131227.o5DCRfIJ012978@rice.haifa.ibm.com> References: <1276431753-nyh@il.ibm.com> Cc: kvm@vger.kernel.org To: avi@redhat.com Return-path: Received: from mtagate7.de.ibm.com ([195.212.17.167]:39066 "EHLO mtagate7.de.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753366Ab0FMM1o (ORCPT ); Sun, 13 Jun 2010 08:27:44 -0400 Received: from d12nrmr1607.megacenter.de.ibm.com (d12nrmr1607.megacenter.de.ibm.com [9.149.167.49]) by mtagate7.de.ibm.com (8.13.1/8.13.1) with ESMTP id o5DCRh9n008832 for ; Sun, 13 Jun 2010 12:27:43 GMT Received: from d12av02.megacenter.de.ibm.com (d12av02.megacenter.de.ibm.com [9.149.165.228]) by d12nrmr1607.megacenter.de.ibm.com (8.13.8/8.13.8/NCO v10.0) with ESMTP id o5DCRh5u1085564 for ; Sun, 13 Jun 2010 14:27:43 +0200 Received: from d12av02.megacenter.de.ibm.com (loopback [127.0.0.1]) by d12av02.megacenter.de.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id o5DCRhQK016967 for ; Sun, 13 Jun 2010 14:27:43 +0200 Sender: kvm-owner@vger.kernel.org List-ID: This patch implements the VMPTRLD instruction. Signed-off-by: Nadav Har'El --- --- .before/arch/x86/kvm/vmx.c 2010-06-13 15:01:29.000000000 +0300 +++ .after/arch/x86/kvm/vmx.c 2010-06-13 15:01:29.000000000 +0300 @@ -3829,6 +3829,26 @@ static int read_guest_vmcs_gpa(struct kv return 0; } +static void set_rflags_to_vmx_fail_invalid(struct kvm_vcpu *vcpu) +{ + unsigned long rflags; + rflags = vmx_get_rflags(vcpu); + rflags |= X86_EFLAGS_CF; + rflags &= ~X86_EFLAGS_PF & ~X86_EFLAGS_AF & ~X86_EFLAGS_ZF & + ~X86_EFLAGS_SF & ~X86_EFLAGS_OF; + vmx_set_rflags(vcpu, rflags); +} + +static void set_rflags_to_vmx_fail_valid(struct kvm_vcpu *vcpu) +{ + unsigned long rflags; + rflags = vmx_get_rflags(vcpu); + rflags |= X86_EFLAGS_ZF; + rflags &= ~X86_EFLAGS_PF & ~X86_EFLAGS_AF & ~X86_EFLAGS_CF & + ~X86_EFLAGS_SF & ~X86_EFLAGS_OF; + vmx_set_rflags(vcpu, rflags); +} + static void clear_rflags_cf_zf(struct kvm_vcpu *vcpu) { unsigned long rflags; @@ -3869,6 +3889,57 @@ static int handle_vmclear(struct kvm_vcp return 1; } +static bool verify_vmcs12_revision(struct kvm_vcpu *vcpu, gpa_t guest_vmcs_addr) +{ + bool ret; + struct vmcs12 *vmcs12; + struct page *vmcs_page = nested_get_page(vcpu, guest_vmcs_addr); + if (vmcs_page == NULL) + return 0; + vmcs12 = (struct vmcs12 *)kmap_atomic(vmcs_page, KM_USER0); + if (vmcs12->revision_id == VMCS12_REVISION) + ret = 1; + else { + set_rflags_to_vmx_fail_valid(vcpu); + ret = 0; + } + kunmap_atomic(vmcs12, KM_USER0); + kvm_release_page_dirty(vmcs_page); + return ret; +} + +/* Emulate the VMPTRLD instruction */ +static int handle_vmptrld(struct kvm_vcpu *vcpu) +{ + struct vcpu_vmx *vmx = to_vmx(vcpu); + gpa_t guest_vmcs_addr; + + if (!nested_vmx_check_permission(vcpu)) + return 1; + + if (read_guest_vmcs_gpa(vcpu, &guest_vmcs_addr)) { + set_rflags_to_vmx_fail_invalid(vcpu); + return 1; + } + + if (!verify_vmcs12_revision(vcpu, guest_vmcs_addr)) + return 1; + + if (vmx->nested.current_vmptr != guest_vmcs_addr) { + vmx->nested.current_vmptr = guest_vmcs_addr; + + if (nested_create_current_vmcs(vcpu)) { + printk(KERN_ERR "%s error could not allocate memory", + __func__); + return -ENOMEM; + } + } + + clear_rflags_cf_zf(vcpu); + skip_emulated_instruction(vcpu); + return 1; +} + static int handle_invlpg(struct kvm_vcpu *vcpu) { unsigned long exit_qualification = vmcs_readl(EXIT_QUALIFICATION); @@ -4153,7 +4224,7 @@ 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,