The patch titled
kvm: less common exit handlers
has been removed from the -mm tree. Its filename was
kvm-less-common-exit-handlers.patch
This patch was dropped because it was folded into kvm-userspace-interface.patch
------------------------------------------------------
Subject: kvm: less common exit handlers
From: Avi Kivity <avi@xxxxxxxxxxxx>
Add exit handlers for msrs, debug registers, and cpuid.
Signed-off-by: Yaniv Kamay <yaniv@xxxxxxxxxxxx>
Signed-off-by: Avi Kivity <avi@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
drivers/kvm/kvm_main.c | 183 +++++++++++++++++++++++++++++++++++++++
1 file changed, 183 insertions(+)
diff -puN drivers/kvm/kvm_main.c~kvm-less-common-exit-handlers drivers/kvm/kvm_main.c
--- a/drivers/kvm/kvm_main.c~kvm-less-common-exit-handlers
+++ a/drivers/kvm/kvm_main.c
@@ -2223,6 +2223,113 @@ 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)
@@ -2257,6 +2364,78 @@ 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)
{
@@ -2289,6 +2468,10 @@ 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,
};
_
Patches currently in -mm which might be from avi@xxxxxxxxxxxx are
origin.patch
kvm-userspace-interface.patch
kvm-less-common-exit-handlers.patch
kvm-less-common-exit-handlers-handle-rdmsrmsr_efer.patch
kvm-mmu.patch
kvm-mmu-mmu-honor-global-bit-on-huge-pages.patch
kvm-x86-emulator.patch
kvm-x86-emulator-x86-emulator-handle-smsw.patch
kvm-clarify-licensing.patch
kvm-x86-emulator-fix-emulator-mov-cr-decoding.patch
kvm-plumbing.patch
kvm-dynamically-determine-which-msrs-to-load-and-save.patch
kvm-fix-calculation-of-initial-value-of-rdx-register.patch
kvm-avoid-using-vmx-instruction-directly.patch
kvm-avoid-using-vmx-instruction-directly-fix-asm-constraints.patch
kvm-expose-interrupt-bitmap.patch
kvm-add-time-stamp-counter-msr-and-accessors.patch
kvm-expose-msrs-to-userspace.patch
kvm-expose-msrs-to-userspace-v2.patch
kvm-create-kvm-intelko-module.patch
kvm-make-dev-registration-happen-when-the-arch.patch
kvm-make-hardware-detection-an-arch-operation.patch
kvm-make-the-per-cpu-enable-disable-functions-arch.patch
kvm-make-the-hardware-setup-operations-non-percpu.patch
kvm-make-the-guest-debugger-an-arch-operation.patch
kvm-make-msr-accessors-arch-operations.patch
kvm-make-the-segment-accessors-arch-operations.patch
kvm-cache-guest-cr4-in-vcpu-structure.patch
kvm-cache-guest-cr0-in-vcpu-structure.patch
kvm-add-get_segment_base-arch-accessor.patch
kvm-add-idt-and-gdt-descriptor-accessors.patch
kvm-make-syncing-the-register-file-to-the-vcpu.patch
kvm-make-the-vcpu-execution-loop-an-arch-operation.patch
kvm-make-the-vcpu-execution-loop-an-arch-operation-build-fix.patch
kvm-move-the-vmx-exit-handlers-to-vmxc.patch
kvm-make-vcpu_setup-an-arch-operation.patch
kvm-make-__set_cr0-and-dependencies-arch-operations.patch
kvm-make-__set_cr4-an-arch-operation.patch
kvm-make-__set_efer-an-arch-operation.patch
kvm-make-__set_efer-an-arch-operation-build-fix.patch
kvm-make-set_cr3-and-tlb-flushing-arch-operations.patch
kvm-make-inject_page_fault-an-arch-operation.patch
kvm-make-inject_gp-an-arch-operation.patch
kvm-use-the-idt-and-gdt-accessors-in-realmode-emulation.patch
kvm-use-the-general-purpose-register-accessors-rather.patch
kvm-move-the-vmx-tsc-accessors-to-vmxc.patch
kvm-access-rflags-through-an-arch-operation.patch
kvm-move-the-vmx-segment-field-definitions-to-vmxc.patch
kvm-add-an-arch-accessor-for-cs-d-b-and-l-bits.patch
kvm-add-a-set_cr0_no_modeswitch-arch-accessor.patch
kvm-make-vcpu_load-and-vcpu_put-arch-operations.patch
kvm-make-vcpu-creation-and-destruction-arch-operations.patch
kvm-move-vmcs-static-variables-to-vmxc.patch
kvm-make-is_long_mode-an-arch-operation.patch
kvm-use-the-tlb-flush-arch-operation-instead-of-an.patch
kvm-remove-guest_cpl.patch
kvm-move-vmcs-accessors-to-vmxc.patch
kvm-move-vmx-helper-inlines-to-vmxc.patch
kvm-remove-vmx-includes-from-arch-independent-code.patch
kvm-amd-svm-add-architecture-definitions-for-amd-svm.patch
kvm-amd-svm-enhance-x86-emulator.patch
kvm-amd-svm-enhance-x86-emulator-fix-mov-to-from-control-register-emulation.patch
kvm-amd-svm-add-missing-tlb-flushes-to-the-guest-mmu.patch
kvm-amd-svm-add-data-structures.patch
kvm-amd-svm-implementation.patch
kvm-amd-svm-implementation-avoid-three-more-new-instructions.patch
kvm-amd-svm-implementation-more-i386-fixes.patch
kvm-amd-svm-implementation-printk-log-levels.patch
kvm-amd-svm-plumbing.patch
kvm-fix-null-and-c99-init-sparse-warnings.patch
kvm-load-i386-segment-bases.patch
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