diff options
Diffstat (limited to 'kvm/kernel/vmx.c')
| -rw-r--r-- | kvm/kernel/vmx.c | 32 |
1 files changed, 28 insertions, 4 deletions
diff --git a/kvm/kernel/vmx.c b/kvm/kernel/vmx.c index 1b8feea48..936aef68a 100644 --- a/kvm/kernel/vmx.c +++ b/kvm/kernel/vmx.c @@ -19,6 +19,7 @@ #include "vmx.h" #include "kvm_vmx.h" #include <linux/module.h> +#include <linux/kernel.h> #include <linux/mm.h> #include <linux/highmem.h> #include <linux/profile.h> @@ -27,7 +28,6 @@ #include "segment_descriptor.h" - MODULE_AUTHOR("Qumranet"); MODULE_LICENSE("GPL"); @@ -76,7 +76,7 @@ static const u32 vmx_msr_index[] = { #endif MSR_EFER, MSR_K6_STAR, }; -#define NR_VMX_MSR (sizeof(vmx_msr_index) / sizeof(*vmx_msr_index)) +#define NR_VMX_MSR ARRAY_SIZE(vmx_msr_index) static inline int is_page_fault(u32 intr_info) { @@ -418,10 +418,9 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data) case MSR_IA32_SYSENTER_ESP: vmcs_write32(GUEST_SYSENTER_ESP, data); break; - case MSR_IA32_TIME_STAMP_COUNTER: { + case MSR_IA32_TIME_STAMP_COUNTER: guest_write_tsc(data); break; - } default: msr = find_msr_entry(vcpu, msr_index); if (msr) { @@ -793,6 +792,9 @@ static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0) */ static void vmx_set_cr0_no_modeswitch(struct kvm_vcpu *vcpu, unsigned long cr0) { + if (!vcpu->rmode.active && !(cr0 & CR0_PE_MASK)) + enter_rmode(vcpu); + vcpu->rmode.active = ((cr0 & CR0_PE_MASK) == 0); update_exception_bitmap(vcpu); vmcs_writel(CR0_READ_SHADOW, cr0); @@ -1128,6 +1130,8 @@ static int vmx_vcpu_setup(struct kvm_vcpu *vcpu) if (rdmsr_safe(index, &data_low, &data_high) < 0) continue; + if (wrmsr_safe(index, data_low, data_high) < 0) + continue; data = data_low | ((u64)data_high << 32); vcpu->host_msrs[j].index = index; vcpu->host_msrs[j].reserved = 0; @@ -1465,6 +1469,18 @@ static int handle_io(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) return 0; } +static void +vmx_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall) +{ + /* + * Patch in the VMCALL instruction: + */ + hypercall[0] = 0x0f; + hypercall[1] = 0x01; + hypercall[2] = 0xc1; + hypercall[3] = 0xc3; +} + static int handle_cr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) { u64 exit_qualification; @@ -1641,6 +1657,12 @@ static int handle_halt(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) return 0; } +static int handle_vmcall(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run) +{ + vmcs_writel(GUEST_RIP, vmcs_readl(GUEST_RIP)+3); + return kvm_hypercall(vcpu, kvm_run); +} + /* * 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 @@ -1659,6 +1681,7 @@ static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu, [EXIT_REASON_MSR_WRITE] = handle_wrmsr, [EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window, [EXIT_REASON_HLT] = handle_halt, + [EXIT_REASON_VMCALL] = handle_vmcall, }; static const int kvm_vmx_max_exit_handlers = @@ -2060,6 +2083,7 @@ static struct kvm_arch_ops vmx_arch_ops = { .run = vmx_vcpu_run, .skip_emulated_instruction = skip_emulated_instruction, .vcpu_setup = vmx_vcpu_setup, + .patch_hypercall = vmx_patch_hypercall, }; static int __init vmx_init(void) |