From patchwork Sun Mar 14 16:20:53 2010 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gleb Natapov X-Patchwork-Id: 85823 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter.kernel.org (8.14.3/8.14.3) with ESMTP id o2EGLeBL019810 for ; Sun, 14 Mar 2010 16:21:40 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932554Ab0CNQVh (ORCPT ); Sun, 14 Mar 2010 12:21:37 -0400 Received: from mx1.redhat.com ([209.132.183.28]:44551 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751675Ab0CNQVX (ORCPT ); Sun, 14 Mar 2010 12:21:23 -0400 Received: from int-mx02.intmail.prod.int.phx2.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) by mx1.redhat.com (8.13.8/8.13.8) with ESMTP id o2EGLNea007921 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Sun, 14 Mar 2010 12:21:23 -0400 Received: from dhcp-1-237.tlv.redhat.com (dhcp-1-237.tlv.redhat.com [10.35.1.237]) by int-mx02.intmail.prod.int.phx2.redhat.com (8.13.8/8.13.8) with ESMTP id o2EGLL9K017826; Sun, 14 Mar 2010 12:21:22 -0400 Received: by dhcp-1-237.tlv.redhat.com (Postfix, from userid 13519) id 02D1C18D458; Sun, 14 Mar 2010 18:21:15 +0200 (IST) From: Gleb Natapov To: avi@redhat.com, mtosatti@redhat.com Cc: kvm@vger.kernel.org Subject: [PATCH v2 08/30] KVM: Provide current eip as part of emulator context. Date: Sun, 14 Mar 2010 18:20:53 +0200 Message-Id: <1268583675-3101-9-git-send-email-gleb@redhat.com> In-Reply-To: <1268583675-3101-1-git-send-email-gleb@redhat.com> References: <1268583675-3101-1-git-send-email-gleb@redhat.com> X-Scanned-By: MIMEDefang 2.67 on 10.5.11.12 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.3 (demeter.kernel.org [140.211.167.41]); Sun, 14 Mar 2010 16:21:40 +0000 (UTC) diff --git a/arch/x86/include/asm/kvm_emulate.h b/arch/x86/include/asm/kvm_emulate.h index b048fd2..0765725 100644 --- a/arch/x86/include/asm/kvm_emulate.h +++ b/arch/x86/include/asm/kvm_emulate.h @@ -141,7 +141,7 @@ struct decode_cache { u8 seg_override; unsigned int d; unsigned long regs[NR_VCPU_REGS]; - unsigned long eip, eip_orig; + unsigned long eip; /* modrm */ u8 modrm; u8 modrm_mod; @@ -160,6 +160,7 @@ struct x86_emulate_ctxt { struct kvm_vcpu *vcpu; unsigned long eflags; + unsigned long eip; /* eip before instruction emulation */ /* Emulated execution mode, represented by an X86EMUL_MODE value. */ int mode; u32 cs_base; diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 8bd0557..2c27aa4 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -667,7 +667,7 @@ static int do_insn_fetch(struct x86_emulate_ctxt *ctxt, int rc; /* x86 instructions are limited to 15 bytes. */ - if (eip + size - ctxt->decode.eip_orig > 15) + if (eip + size - ctxt->eip > 15) return X86EMUL_UNHANDLEABLE; eip += ctxt->cs_base; while (size--) { @@ -927,7 +927,7 @@ x86_decode_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) /* Shadow copy of register state. Committed on successful emulation. */ memset(c, 0, sizeof(struct decode_cache)); - c->eip = c->eip_orig = kvm_rip_read(ctxt->vcpu); + c->eip = ctxt->eip; ctxt->cs_base = seg_base(ctxt, VCPU_SREG_CS); memcpy(c->regs, ctxt->vcpu->arch.regs, sizeof c->regs); @@ -1878,7 +1878,7 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) } } register_address_increment(c, &c->regs[VCPU_REGS_RCX], -1); - c->eip = kvm_rip_read(ctxt->vcpu); + c->eip = ctxt->eip; } if (c->src.type == OP_MEM) { @@ -2447,7 +2447,7 @@ twobyte_insn: goto done; /* Let the processor re-execute the fixed hypercall */ - c->eip = kvm_rip_read(ctxt->vcpu); + c->eip = ctxt->eip; /* Disable writeback. */ c->dst.type = OP_NONE; break; @@ -2551,7 +2551,7 @@ twobyte_insn: | ((u64)c->regs[VCPU_REGS_RDX] << 32); if (kvm_set_msr(ctxt->vcpu, c->regs[VCPU_REGS_RCX], msr_data)) { kvm_inject_gp(ctxt->vcpu, 0); - c->eip = kvm_rip_read(ctxt->vcpu); + c->eip = ctxt->eip; } rc = X86EMUL_CONTINUE; c->dst.type = OP_NONE; @@ -2560,7 +2560,7 @@ twobyte_insn: /* rdmsr */ if (kvm_get_msr(ctxt->vcpu, c->regs[VCPU_REGS_RCX], &msr_data)) { kvm_inject_gp(ctxt->vcpu, 0); - c->eip = kvm_rip_read(ctxt->vcpu); + c->eip = ctxt->eip; } else { c->regs[VCPU_REGS_RAX] = (u32)msr_data; c->regs[VCPU_REGS_RDX] = msr_data >> 32; diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 3f2a8d3..6cbac79 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -3478,6 +3478,7 @@ int emulate_instruction(struct kvm_vcpu *vcpu, vcpu->arch.emulate_ctxt.vcpu = vcpu; vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu); + vcpu->arch.emulate_ctxt.eip = kvm_rip_read(vcpu); vcpu->arch.emulate_ctxt.mode = (!is_protmode(vcpu)) ? X86EMUL_MODE_REAL : (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM)