Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1945908AbWJZRcA (ORCPT ); Thu, 26 Oct 2006 13:32:00 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1945913AbWJZRcA (ORCPT ); Thu, 26 Oct 2006 13:32:00 -0400 Received: from il.qumranet.com ([62.219.232.206]:37555 "EHLO cleopatra.q") by vger.kernel.org with ESMTP id S1945908AbWJZRb6 (ORCPT ); Thu, 26 Oct 2006 13:31:58 -0400 Subject: [PATCH 10/13] KVM: less common exit handlers From: Avi Kivity Date: Thu, 26 Oct 2006 17:31:57 -0000 To: linux-kernel@vger.kernel.org, kvm-devel@lists.sourceforge.net References: <4540EE2B.9020606@qumranet.com> In-Reply-To: <4540EE2B.9020606@qumranet.com> Message-Id: <20061026173157.44C3CA0209@cleopatra.q> Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 5479 Lines: 218 Add exit handlers for msrs, debug registers, and cpuid. Signed-off-by: Yaniv Kamay Signed-off-by: Avi Kivity Index: linux-2.6/drivers/kvm/kvm_main.c =================================================================== --- linux-2.6.orig/drivers/kvm/kvm_main.c +++ linux-2.6/drivers/kvm/kvm_main.c @@ -2161,6 +2161,113 @@ static int handle_cr(struct kvm_vcpu *vc return 0; } +static int handle_dr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) +{ + u64 exit_qualification; + unsigned long val; + int dr, reg; + + /* + * FIXME: this code assumes the host is debugging the guest. + * need to deal with guest debugging itself too. + */ + exit_qualification = vmcs_read64(EXIT_QUALIFICATION); + dr = exit_qualification & 7; + reg = (exit_qualification >> 8) & 15; + vcpu_load_rsp_rip(vcpu); + if (exit_qualification & 16) { + /* mov from dr */ + switch (dr) { + case 6: + val = 0xffff0ff0; + break; + case 7: + val = 0x400; + break; + default: + val = 0; + } + vcpu->regs[reg] = val; + } else { + /* mov to dr */ + } + vcpu_put_rsp_rip(vcpu); + skip_emulated_instruction(vcpu); + return 1; +} + +static int handle_cpuid(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) +{ + kvm_run->exit_reason = KVM_EXIT_CPUID; + return 0; +} + +static int handle_rdmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) +{ + u32 ecx = vcpu->regs[VCPU_REGS_RCX]; + struct vmx_msr_entry *msr = find_msr_entry(vcpu, ecx); + u64 data; + +#ifdef KVM_DEBUG + if (guest_cpl() != 0) { + vcpu_printf(vcpu, "%s: not supervisor\n", __FUNCTION__); + inject_gp(vcpu); + return 1; + } +#endif + + switch (ecx) { +#ifdef __x86_64__ + case MSR_FS_BASE: + data = vmcs_readl(GUEST_FS_BASE); + break; + case MSR_GS_BASE: + data = vmcs_readl(GUEST_GS_BASE); + break; +#endif + case MSR_IA32_SYSENTER_CS: + data = vmcs_read32(GUEST_SYSENTER_CS); + break; + case MSR_IA32_SYSENTER_EIP: + data = vmcs_read32(GUEST_SYSENTER_EIP); + break; + case MSR_IA32_SYSENTER_ESP: + data = vmcs_read32(GUEST_SYSENTER_ESP); + break; + case MSR_IA32_MC0_CTL: + case MSR_IA32_MCG_STATUS: + case MSR_IA32_MCG_CAP: + case MSR_IA32_MC0_MISC: + case MSR_IA32_MC0_MISC+4: + case MSR_IA32_MC0_MISC+8: + case MSR_IA32_MC0_MISC+12: + case MSR_IA32_MC0_MISC+16: + case MSR_IA32_UCODE_REV: + /* MTRR registers */ + case 0xfe: + case 0x200 ... 0x2ff: + data = 0; + break; + case MSR_IA32_APICBASE: + data = vcpu->apic_base; + break; + default: + if (msr) { + data = msr->data; + break; + } + printk(KERN_ERR "kvm: unhandled rdmsr: %x\n", ecx); + inject_gp(vcpu); + return 1; + } + + /* FIXME: handling of bits 32:63 of rax, rdx */ + vcpu->regs[VCPU_REGS_RAX] = data & -1u; + vcpu->regs[VCPU_REGS_RDX] = (data >> 32) & -1u; + skip_emulated_instruction(vcpu); + return 1; +} + #ifdef __x86_64__ static void set_efer(struct kvm_vcpu *vcpu, u64 efer) @@ -2195,6 +2302,78 @@ static void set_efer(struct kvm_vcpu *vc #endif +#define MSR_IA32_TIME_STAMP_COUNTER 0x10 + +static int handle_wrmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) +{ + u32 ecx = vcpu->regs[VCPU_REGS_RCX]; + struct vmx_msr_entry *msr; + u64 data = (vcpu->regs[VCPU_REGS_RAX] & -1u) + | ((u64)(vcpu->regs[VCPU_REGS_RDX] & -1u) << 32); + +#ifdef KVM_DEBUG + if (guest_cpl() != 0) { + vcpu_printf(vcpu, "%s: not supervisor\n", __FUNCTION__); + inject_gp(vcpu); + return 1; + } +#endif + + switch (ecx) { +#ifdef __x86_64__ + case MSR_FS_BASE: + vmcs_writel(GUEST_FS_BASE, data); + break; + case MSR_GS_BASE: + vmcs_writel(GUEST_GS_BASE, data); + break; +#endif + case MSR_IA32_SYSENTER_CS: + vmcs_write32(GUEST_SYSENTER_CS, data); + break; + case MSR_IA32_SYSENTER_EIP: + vmcs_write32(GUEST_SYSENTER_EIP, data); + break; + case MSR_IA32_SYSENTER_ESP: + vmcs_write32(GUEST_SYSENTER_ESP, data); + break; +#ifdef __x86_64 + case MSR_EFER: + set_efer(vcpu, data); + return 1; + case MSR_IA32_MC0_STATUS: + printk(KERN_WARNING "%s: MSR_IA32_MC0_STATUS 0x%llx, nop\n" + , __FUNCTION__, data); + break; +#endif + case MSR_IA32_TIME_STAMP_COUNTER: { + u64 tsc; + + rdtscll(tsc); + vmcs_write64(TSC_OFFSET, data - tsc); + break; + } + case MSR_IA32_UCODE_REV: + case MSR_IA32_UCODE_WRITE: + case 0x200 ... 0x2ff: /* MTRRs */ + break; + case MSR_IA32_APICBASE: + vcpu->apic_base = data; + break; + default: + msr = find_msr_entry(vcpu, ecx); + if (msr) { + msr->data = data; + break; + } + printk(KERN_ERR "kvm: unhandled wrmsr: %x\n", ecx); + inject_gp(vcpu); + return 1; + } + skip_emulated_instruction(vcpu); + return 1; +} + static int handle_interrupt_window(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) { @@ -2227,6 +2406,10 @@ static int (*kvm_vmx_exit_handlers[])(st [EXIT_REASON_IO_INSTRUCTION] = handle_io, [EXIT_REASON_INVLPG] = handle_invlpg, [EXIT_REASON_CR_ACCESS] = handle_cr, + [EXIT_REASON_DR_ACCESS] = handle_dr, + [EXIT_REASON_CPUID] = handle_cpuid, + [EXIT_REASON_MSR_READ] = handle_rdmsr, + [EXIT_REASON_MSR_WRITE] = handle_wrmsr, [EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window, [EXIT_REASON_HLT] = handle_halt, }; - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/