+++ /dev/null
-/*
- * Kernel-based Virtual Machine driver for Linux
- *
- * This module enables machines with Intel VT-x extensions to run virtual
- * machines without emulation or binary translation.
- *
- * Copyright (C) 2006 Qumranet, Inc.
- *
- * Authors:
- * Avi Kivity <avi@qumranet.com>
- * Yaniv Kamay <yaniv@qumranet.com>
- *
- * This work is licensed under the terms of the GNU GPL, version 2. See
- * the COPYING file in the top-level directory.
- *
- */
-
-#include "kvm.h"
-#include "x86.h"
-#include "x86_emulate.h"
-#include "irq.h"
-#include "vmx.h"
-#include "segment_descriptor.h"
-#include "mmu.h"
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/mm.h>
-#include <linux/highmem.h>
-#include <linux/sched.h>
-#include <linux/moduleparam.h>
-
-#include <asm/io.h>
-#include <asm/desc.h>
-
-MODULE_AUTHOR("Qumranet");
-MODULE_LICENSE("GPL");
-
-static int bypass_guest_pf = 1;
-module_param(bypass_guest_pf, bool, 0);
-
-struct vmcs {
- u32 revision_id;
- u32 abort;
- char data[0];
-};
-
-struct vcpu_vmx {
- struct kvm_vcpu vcpu;
- int launched;
- u8 fail;
- u32 idt_vectoring_info;
- struct kvm_msr_entry *guest_msrs;
- struct kvm_msr_entry *host_msrs;
- int nmsrs;
- int save_nmsrs;
- int msr_offset_efer;
-#ifdef CONFIG_X86_64
- int msr_offset_kernel_gs_base;
-#endif
- struct vmcs *vmcs;
- struct {
- int loaded;
- u16 fs_sel, gs_sel, ldt_sel;
- int gs_ldt_reload_needed;
- int fs_reload_needed;
- int guest_efer_loaded;
- } host_state;
- struct {
- struct {
- bool pending;
- u8 vector;
- unsigned rip;
- } irq;
- } rmode;
-};
-
-static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu)
-{
- return container_of(vcpu, struct vcpu_vmx, vcpu);
-}
-
-static int init_rmode_tss(struct kvm *kvm);
-
-static DEFINE_PER_CPU(struct vmcs *, vmxarea);
-static DEFINE_PER_CPU(struct vmcs *, current_vmcs);
-
-static struct page *vmx_io_bitmap_a;
-static struct page *vmx_io_bitmap_b;
-
-static struct vmcs_config {
- int size;
- int order;
- u32 revision_id;
- u32 pin_based_exec_ctrl;
- u32 cpu_based_exec_ctrl;
- u32 cpu_based_2nd_exec_ctrl;
- u32 vmexit_ctrl;
- u32 vmentry_ctrl;
-} vmcs_config;
-
-#define VMX_SEGMENT_FIELD(seg) \
- [VCPU_SREG_##seg] = { \
- .selector = GUEST_##seg##_SELECTOR, \
- .base = GUEST_##seg##_BASE, \
- .limit = GUEST_##seg##_LIMIT, \
- .ar_bytes = GUEST_##seg##_AR_BYTES, \
- }
-
-static struct kvm_vmx_segment_field {
- unsigned selector;
- unsigned base;
- unsigned limit;
- unsigned ar_bytes;
-} kvm_vmx_segment_fields[] = {
- VMX_SEGMENT_FIELD(CS),
- VMX_SEGMENT_FIELD(DS),
- VMX_SEGMENT_FIELD(ES),
- VMX_SEGMENT_FIELD(FS),
- VMX_SEGMENT_FIELD(GS),
- VMX_SEGMENT_FIELD(SS),
- VMX_SEGMENT_FIELD(TR),
- VMX_SEGMENT_FIELD(LDTR),
-};
-
-/*
- * Keep MSR_K6_STAR at the end, as setup_msrs() will try to optimize it
- * away by decrementing the array size.
- */
-static const u32 vmx_msr_index[] = {
-#ifdef CONFIG_X86_64
- MSR_SYSCALL_MASK, MSR_LSTAR, MSR_CSTAR, MSR_KERNEL_GS_BASE,
-#endif
- MSR_EFER, MSR_K6_STAR,
-};
-#define NR_VMX_MSR ARRAY_SIZE(vmx_msr_index)
-
-static void load_msrs(struct kvm_msr_entry *e, int n)
-{
- int i;
-
- for (i = 0; i < n; ++i)
- wrmsrl(e[i].index, e[i].data);
-}
-
-static void save_msrs(struct kvm_msr_entry *e, int n)
-{
- int i;
-
- for (i = 0; i < n; ++i)
- rdmsrl(e[i].index, e[i].data);
-}
-
-static inline int is_page_fault(u32 intr_info)
-{
- return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
- INTR_INFO_VALID_MASK)) ==
- (INTR_TYPE_EXCEPTION | PF_VECTOR | INTR_INFO_VALID_MASK);
-}
-
-static inline int is_no_device(u32 intr_info)
-{
- return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
- INTR_INFO_VALID_MASK)) ==
- (INTR_TYPE_EXCEPTION | NM_VECTOR | INTR_INFO_VALID_MASK);
-}
-
-static inline int is_invalid_opcode(u32 intr_info)
-{
- return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK |
- INTR_INFO_VALID_MASK)) ==
- (INTR_TYPE_EXCEPTION | UD_VECTOR | INTR_INFO_VALID_MASK);
-}
-
-static inline int is_external_interrupt(u32 intr_info)
-{
- return (intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VALID_MASK))
- == (INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK);
-}
-
-static inline int cpu_has_vmx_tpr_shadow(void)
-{
- return (vmcs_config.cpu_based_exec_ctrl & CPU_BASED_TPR_SHADOW);
-}
-
-static inline int vm_need_tpr_shadow(struct kvm *kvm)
-{
- return ((cpu_has_vmx_tpr_shadow()) && (irqchip_in_kernel(kvm)));
-}
-
-static inline int cpu_has_secondary_exec_ctrls(void)
-{
- return (vmcs_config.cpu_based_exec_ctrl &
- CPU_BASED_ACTIVATE_SECONDARY_CONTROLS);
-}
-
-static inline int cpu_has_vmx_virtualize_apic_accesses(void)
-{
- return (vmcs_config.cpu_based_2nd_exec_ctrl &
- SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES);
-}
-
-static inline int vm_need_virtualize_apic_accesses(struct kvm *kvm)
-{
- return ((cpu_has_vmx_virtualize_apic_accesses()) &&
- (irqchip_in_kernel(kvm)));
-}
-
-static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr)
-{
- int i;
-
- for (i = 0; i < vmx->nmsrs; ++i)
- if (vmx->guest_msrs[i].index == msr)
- return i;
- return -1;
-}
-
-static struct kvm_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr)
-{
- int i;
-
- i = __find_msr_index(vmx, msr);
- if (i >= 0)
- return &vmx->guest_msrs[i];
- return NULL;
-}
-
-static void vmcs_clear(struct vmcs *vmcs)
-{
- u64 phys_addr = __pa(vmcs);
- u8 error;
-
- asm volatile (ASM_VMX_VMCLEAR_RAX "; setna %0"
- : "=g"(error) : "a"(&phys_addr), "m"(phys_addr)
- : "cc", "memory");
- if (error)
- printk(KERN_ERR "kvm: vmclear fail: %p/%llx\n",
- vmcs, phys_addr);
-}
-
-static void __vcpu_clear(void *arg)
-{
- struct vcpu_vmx *vmx = arg;
- int cpu = raw_smp_processor_id();
-
- if (vmx->vcpu.cpu == cpu)
- vmcs_clear(vmx->vmcs);
- if (per_cpu(current_vmcs, cpu) == vmx->vmcs)
- per_cpu(current_vmcs, cpu) = NULL;
- rdtscll(vmx->vcpu.arch.host_tsc);
-}
-
-static void vcpu_clear(struct vcpu_vmx *vmx)
-{
- if (vmx->vcpu.cpu == -1)
- return;
- smp_call_function_single(vmx->vcpu.cpu, __vcpu_clear, vmx, 0, 1);
- vmx->launched = 0;
-}
-
-static unsigned long vmcs_readl(unsigned long field)
-{
- unsigned long value;
-
- asm volatile (ASM_VMX_VMREAD_RDX_RAX
- : "=a"(value) : "d"(field) : "cc");
- return value;
-}
-
-static u16 vmcs_read16(unsigned long field)
-{
- return vmcs_readl(field);
-}
-
-static u32 vmcs_read32(unsigned long field)
-{
- return vmcs_readl(field);
-}
-
-static u64 vmcs_read64(unsigned long field)
-{
-#ifdef CONFIG_X86_64
- return vmcs_readl(field);
-#else
- return vmcs_readl(field) | ((u64)vmcs_readl(field+1) << 32);
-#endif
-}
-
-static noinline void vmwrite_error(unsigned long field, unsigned long value)
-{
- printk(KERN_ERR "vmwrite error: reg %lx value %lx (err %d)\n",
- field, value, vmcs_read32(VM_INSTRUCTION_ERROR));
- dump_stack();
-}
-
-static void vmcs_writel(unsigned long field, unsigned long value)
-{
- u8 error;
-
- asm volatile (ASM_VMX_VMWRITE_RAX_RDX "; setna %0"
- : "=q"(error) : "a"(value), "d"(field) : "cc");
- if (unlikely(error))
- vmwrite_error(field, value);
-}
-
-static void vmcs_write16(unsigned long field, u16 value)
-{
- vmcs_writel(field, value);
-}
-
-static void vmcs_write32(unsigned long field, u32 value)
-{
- vmcs_writel(field, value);
-}
-
-static void vmcs_write64(unsigned long field, u64 value)
-{
-#ifdef CONFIG_X86_64
- vmcs_writel(field, value);
-#else
- vmcs_writel(field, value);
- asm volatile ("");
- vmcs_writel(field+1, value >> 32);
-#endif
-}
-
-static void vmcs_clear_bits(unsigned long field, u32 mask)
-{
- vmcs_writel(field, vmcs_readl(field) & ~mask);
-}
-
-static void vmcs_set_bits(unsigned long field, u32 mask)
-{
- vmcs_writel(field, vmcs_readl(field) | mask);
-}
-
-static void update_exception_bitmap(struct kvm_vcpu *vcpu)
-{
- u32 eb;
-
- eb = (1u << PF_VECTOR) | (1u << UD_VECTOR);
- if (!vcpu->fpu_active)
- eb |= 1u << NM_VECTOR;
- if (vcpu->guest_debug.enabled)
- eb |= 1u << 1;
- if (vcpu->arch.rmode.active)
- eb = ~0;
- vmcs_write32(EXCEPTION_BITMAP, eb);
-}
-
-static void reload_tss(void)
-{
-#ifndef CONFIG_X86_64
-
- /*
- * VT restores TR but not its size. Useless.
- */
- struct descriptor_table gdt;
- struct segment_descriptor *descs;
-
- get_gdt(&gdt);
- descs = (void *)gdt.base;
- descs[GDT_ENTRY_TSS].type = 9; /* available TSS */
- load_TR_desc();
-#endif
-}
-
-static void load_transition_efer(struct vcpu_vmx *vmx)
-{
- int efer_offset = vmx->msr_offset_efer;
- u64 host_efer = vmx->host_msrs[efer_offset].data;
- u64 guest_efer = vmx->guest_msrs[efer_offset].data;
- u64 ignore_bits;
-
- if (efer_offset < 0)
- return;
- /*
- * NX is emulated; LMA and LME handled by hardware; SCE meaninless
- * outside long mode
- */
- ignore_bits = EFER_NX | EFER_SCE;
-#ifdef CONFIG_X86_64
- ignore_bits |= EFER_LMA | EFER_LME;
- /* SCE is meaningful only in long mode on Intel */
- if (guest_efer & EFER_LMA)
- ignore_bits &= ~(u64)EFER_SCE;
-#endif
- if ((guest_efer & ~ignore_bits) == (host_efer & ~ignore_bits))
- return;
-
- vmx->host_state.guest_efer_loaded = 1;
- guest_efer &= ~ignore_bits;
- guest_efer |= host_efer & ignore_bits;
- wrmsrl(MSR_EFER, guest_efer);
- vmx->vcpu.stat.efer_reload++;
-}
-
-static void reload_host_efer(struct vcpu_vmx *vmx)
-{
- if (vmx->host_state.guest_efer_loaded) {
- vmx->host_state.guest_efer_loaded = 0;
- load_msrs(vmx->host_msrs + vmx->msr_offset_efer, 1);
- }
-}
-
-static void vmx_save_host_state(struct kvm_vcpu *vcpu)
-{
- struct vcpu_vmx *vmx = to_vmx(vcpu);
-
- if (vmx->host_state.loaded)
- return;
-
- vmx->host_state.loaded = 1;
- /*
- * Set host fs and gs selectors. Unfortunately, 22.2.3 does not
- * allow segment selectors with cpl > 0 or ti == 1.
- */
- vmx->host_state.ldt_sel = read_ldt();
- vmx->host_state.gs_ldt_reload_needed = vmx->host_state.ldt_sel;
- vmx->host_state.fs_sel = read_fs();
- if (!(vmx->host_state.fs_sel & 7)) {
- vmcs_write16(HOST_FS_SELECTOR, vmx->host_state.fs_sel);
- vmx->host_state.fs_reload_needed = 0;
- } else {
- vmcs_write16(HOST_FS_SELECTOR, 0);
- vmx->host_state.fs_reload_needed = 1;
- }
- vmx->host_state.gs_sel = read_gs();
- if (!(vmx->host_state.gs_sel & 7))
- vmcs_write16(HOST_GS_SELECTOR, vmx->host_state.gs_sel);
- else {
- vmcs_write16(HOST_GS_SELECTOR, 0);
- vmx->host_state.gs_ldt_reload_needed = 1;
- }
-
-#ifdef CONFIG_X86_64
- vmcs_writel(HOST_FS_BASE, read_msr(MSR_FS_BASE));
- vmcs_writel(HOST_GS_BASE, read_msr(MSR_GS_BASE));
-#else
- vmcs_writel(HOST_FS_BASE, segment_base(vmx->host_state.fs_sel));
- vmcs_writel(HOST_GS_BASE, segment_base(vmx->host_state.gs_sel));
-#endif
-
-#ifdef CONFIG_X86_64
- if (is_long_mode(&vmx->vcpu))
- save_msrs(vmx->host_msrs +
- vmx->msr_offset_kernel_gs_base, 1);
-
-#endif
- load_msrs(vmx->guest_msrs, vmx->save_nmsrs);
- load_transition_efer(vmx);
-}
-
-static void vmx_load_host_state(struct vcpu_vmx *vmx)
-{
- unsigned long flags;
-
- if (!vmx->host_state.loaded)
- return;
-
- ++vmx->vcpu.stat.host_state_reload;
- vmx->host_state.loaded = 0;
- if (vmx->host_state.fs_reload_needed)
- load_fs(vmx->host_state.fs_sel);
- if (vmx->host_state.gs_ldt_reload_needed) {
- load_ldt(vmx->host_state.ldt_sel);
- /*
- * If we have to reload gs, we must take care to
- * preserve our gs base.
- */
- local_irq_save(flags);
- load_gs(vmx->host_state.gs_sel);
-#ifdef CONFIG_X86_64
- wrmsrl(MSR_GS_BASE, vmcs_readl(HOST_GS_BASE));
-#endif
- local_irq_restore(flags);
- }
- reload_tss();
- save_msrs(vmx->guest_msrs, vmx->save_nmsrs);
- load_msrs(vmx->host_msrs, vmx->save_nmsrs);
- reload_host_efer(vmx);
-}
-
-/*
- * Switches to specified vcpu, until a matching vcpu_put(), but assumes
- * vcpu mutex is already taken.
- */
-static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
-{
- struct vcpu_vmx *vmx = to_vmx(vcpu);
- u64 phys_addr = __pa(vmx->vmcs);
- u64 tsc_this, delta;
-
- if (vcpu->cpu != cpu) {
- vcpu_clear(vmx);
- kvm_migrate_apic_timer(vcpu);
- }
-
- if (per_cpu(current_vmcs, cpu) != vmx->vmcs) {
- u8 error;
-
- per_cpu(current_vmcs, cpu) = vmx->vmcs;
- asm volatile (ASM_VMX_VMPTRLD_RAX "; setna %0"
- : "=g"(error) : "a"(&phys_addr), "m"(phys_addr)
- : "cc");
- if (error)
- printk(KERN_ERR "kvm: vmptrld %p/%llx fail\n",
- vmx->vmcs, phys_addr);
- }
-
- if (vcpu->cpu != cpu) {
- struct descriptor_table dt;
- unsigned long sysenter_esp;
-
- vcpu->cpu = cpu;
- /*
- * Linux uses per-cpu TSS and GDT, so set these when switching
- * processors.
- */
- vmcs_writel(HOST_TR_BASE, read_tr_base()); /* 22.2.4 */
- get_gdt(&dt);
- vmcs_writel(HOST_GDTR_BASE, dt.base); /* 22.2.4 */
-
- rdmsrl(MSR_IA32_SYSENTER_ESP, sysenter_esp);
- vmcs_writel(HOST_IA32_SYSENTER_ESP, sysenter_esp); /* 22.2.3 */
-
- /*
- * Make sure the time stamp counter is monotonous.
- */
- rdtscll(tsc_this);
- delta = vcpu->arch.host_tsc - tsc_this;
- vmcs_write64(TSC_OFFSET, vmcs_read64(TSC_OFFSET) + delta);
- }
-}
-
-static void vmx_vcpu_put(struct kvm_vcpu *vcpu)
-{
- vmx_load_host_state(to_vmx(vcpu));
-}
-
-static void vmx_fpu_activate(struct kvm_vcpu *vcpu)
-{
- if (vcpu->fpu_active)
- return;
- vcpu->fpu_active = 1;
- vmcs_clear_bits(GUEST_CR0, X86_CR0_TS);
- if (vcpu->arch.cr0 & X86_CR0_TS)
- vmcs_set_bits(GUEST_CR0, X86_CR0_TS);
- update_exception_bitmap(vcpu);
-}
-
-static void vmx_fpu_deactivate(struct kvm_vcpu *vcpu)
-{
- if (!vcpu->fpu_active)
- return;
- vcpu->fpu_active = 0;
- vmcs_set_bits(GUEST_CR0, X86_CR0_TS);
- update_exception_bitmap(vcpu);
-}
-
-static void vmx_vcpu_decache(struct kvm_vcpu *vcpu)
-{
- vcpu_clear(to_vmx(vcpu));
-}
-
-static unsigned long vmx_get_rflags(struct kvm_vcpu *vcpu)
-{
- return vmcs_readl(GUEST_RFLAGS);
-}
-
-static void vmx_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
-{
- if (vcpu->arch.rmode.active)
- rflags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM;
- vmcs_writel(GUEST_RFLAGS, rflags);
-}
-
-static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
-{
- unsigned long rip;
- u32 interruptibility;
-
- rip = vmcs_readl(GUEST_RIP);
- rip += vmcs_read32(VM_EXIT_INSTRUCTION_LEN);
- vmcs_writel(GUEST_RIP, rip);
-
- /*
- * We emulated an instruction, so temporary interrupt blocking
- * should be removed, if set.
- */
- interruptibility = vmcs_read32(GUEST_INTERRUPTIBILITY_INFO);
- if (interruptibility & 3)
- vmcs_write32(GUEST_INTERRUPTIBILITY_INFO,
- interruptibility & ~3);
- vcpu->arch.interrupt_window_open = 1;
-}
-
-static void vmx_queue_exception(struct kvm_vcpu *vcpu, unsigned nr,
- bool has_error_code, u32 error_code)
-{
- vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
- nr | INTR_TYPE_EXCEPTION
- | (has_error_code ? INTR_INFO_DELIEVER_CODE_MASK : 0)
- | INTR_INFO_VALID_MASK);
- if (has_error_code)
- vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE, error_code);
-}
-
-static bool vmx_exception_injected(struct kvm_vcpu *vcpu)
-{
- struct vcpu_vmx *vmx = to_vmx(vcpu);
-
- return !(vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK);
-}
-
-/*
- * Swap MSR entry in host/guest MSR entry array.
- */
-#ifdef CONFIG_X86_64
-static void move_msr_up(struct vcpu_vmx *vmx, int from, int to)
-{
- struct kvm_msr_entry tmp;
-
- tmp = vmx->guest_msrs[to];
- vmx->guest_msrs[to] = vmx->guest_msrs[from];
- vmx->guest_msrs[from] = tmp;
- tmp = vmx->host_msrs[to];
- vmx->host_msrs[to] = vmx->host_msrs[from];
- vmx->host_msrs[from] = tmp;
-}
-#endif
-
-/*
- * Set up the vmcs to automatically save and restore system
- * msrs. Don't touch the 64-bit msrs if the guest is in legacy
- * mode, as fiddling with msrs is very expensive.
- */
-static void setup_msrs(struct vcpu_vmx *vmx)
-{
- int save_nmsrs;
-
- save_nmsrs = 0;
-#ifdef CONFIG_X86_64
- if (is_long_mode(&vmx->vcpu)) {
- int index;
-
- index = __find_msr_index(vmx, MSR_SYSCALL_MASK);
- if (index >= 0)
- move_msr_up(vmx, index, save_nmsrs++);
- index = __find_msr_index(vmx, MSR_LSTAR);
- if (index >= 0)
- move_msr_up(vmx, index, save_nmsrs++);
- index = __find_msr_index(vmx, MSR_CSTAR);
- if (index >= 0)
- move_msr_up(vmx, index, save_nmsrs++);
- index = __find_msr_index(vmx, MSR_KERNEL_GS_BASE);
- if (index >= 0)
- move_msr_up(vmx, index, save_nmsrs++);
- /*
- * MSR_K6_STAR is only needed on long mode guests, and only
- * if efer.sce is enabled.
- */
- index = __find_msr_index(vmx, MSR_K6_STAR);
- if ((index >= 0) && (vmx->vcpu.arch.shadow_efer & EFER_SCE))
- move_msr_up(vmx, index, save_nmsrs++);
- }
-#endif
- vmx->save_nmsrs = save_nmsrs;
-
-#ifdef CONFIG_X86_64
- vmx->msr_offset_kernel_gs_base =
- __find_msr_index(vmx, MSR_KERNEL_GS_BASE);
-#endif
- vmx->msr_offset_efer = __find_msr_index(vmx, MSR_EFER);
-}
-
-/*
- * reads and returns guest's timestamp counter "register"
- * guest_tsc = host_tsc + tsc_offset -- 21.3
- */
-static u64 guest_read_tsc(void)
-{
- u64 host_tsc, tsc_offset;
-
- rdtscll(host_tsc);
- tsc_offset = vmcs_read64(TSC_OFFSET);
- return host_tsc + tsc_offset;
-}
-
-/*
- * writes 'guest_tsc' into guest's timestamp counter "register"
- * guest_tsc = host_tsc + tsc_offset ==> tsc_offset = guest_tsc - host_tsc
- */
-static void guest_write_tsc(u64 guest_tsc)
-{
- u64 host_tsc;
-
- rdtscll(host_tsc);
- vmcs_write64(TSC_OFFSET, guest_tsc - host_tsc);
-}
-
-/*
- * Reads an msr value (of 'msr_index') into 'pdata'.
- * Returns 0 on success, non-0 otherwise.
- * Assumes vcpu_load() was already called.
- */
-static int vmx_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
-{
- u64 data;
- struct kvm_msr_entry *msr;
-
- if (!pdata) {
- printk(KERN_ERR "BUG: get_msr called with NULL pdata\n");
- return -EINVAL;
- }
-
- switch (msr_index) {
-#ifdef CONFIG_X86_64
- case MSR_FS_BASE:
- data = vmcs_readl(GUEST_FS_BASE);
- break;
- case MSR_GS_BASE:
- data = vmcs_readl(GUEST_GS_BASE);
- break;
- case MSR_EFER:
- return kvm_get_msr_common(vcpu, msr_index, pdata);
-#endif
- case MSR_IA32_TIME_STAMP_COUNTER:
- data = guest_read_tsc();
- break;
- case MSR_IA32_SYSENTER_CS:
- data = vmcs_read32(GUEST_SYSENTER_CS);
- break;
- case MSR_IA32_SYSENTER_EIP:
- data = vmcs_readl(GUEST_SYSENTER_EIP);
- break;
- case MSR_IA32_SYSENTER_ESP:
- data = vmcs_readl(GUEST_SYSENTER_ESP);
- break;
- default:
- msr = find_msr_entry(to_vmx(vcpu), msr_index);
- if (msr) {
- data = msr->data;
- break;
- }
- return kvm_get_msr_common(vcpu, msr_index, pdata);
- }
-
- *pdata = data;
- return 0;
-}
-
-/*
- * Writes msr value into into the appropriate "register".
- * Returns 0 on success, non-0 otherwise.
- * Assumes vcpu_load() was already called.
- */
-static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
-{
- struct vcpu_vmx *vmx = to_vmx(vcpu);
- struct kvm_msr_entry *msr;
- int ret = 0;
-
- switch (msr_index) {
-#ifdef CONFIG_X86_64
- case MSR_EFER:
- ret = kvm_set_msr_common(vcpu, msr_index, data);
- if (vmx->host_state.loaded) {
- reload_host_efer(vmx);
- load_transition_efer(vmx);
- }
- break;
- 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_writel(GUEST_SYSENTER_EIP, data);
- break;
- case MSR_IA32_SYSENTER_ESP:
- vmcs_writel(GUEST_SYSENTER_ESP, data);
- break;
- case MSR_IA32_TIME_STAMP_COUNTER:
- guest_write_tsc(data);
- break;
- default:
- msr = find_msr_entry(vmx, msr_index);
- if (msr) {
- msr->data = data;
- if (vmx->host_state.loaded)
- load_msrs(vmx->guest_msrs, vmx->save_nmsrs);
- break;
- }
- ret = kvm_set_msr_common(vcpu, msr_index, data);
- }
-
- return ret;
-}
-
-/*
- * Sync the rsp and rip registers into the vcpu structure. This allows
- * registers to be accessed by indexing vcpu->arch.regs.
- */
-static void vcpu_load_rsp_rip(struct kvm_vcpu *vcpu)
-{
- vcpu->arch.regs[VCPU_REGS_RSP] = vmcs_readl(GUEST_RSP);
- vcpu->arch.rip = vmcs_readl(GUEST_RIP);
-}
-
-/*
- * Syncs rsp and rip back into the vmcs. Should be called after possible
- * modification.
- */
-static void vcpu_put_rsp_rip(struct kvm_vcpu *vcpu)
-{
- vmcs_writel(GUEST_RSP, vcpu->arch.regs[VCPU_REGS_RSP]);
- vmcs_writel(GUEST_RIP, vcpu->arch.rip);
-}
-
-static int set_guest_debug(struct kvm_vcpu *vcpu, struct kvm_debug_guest *dbg)
-{
- unsigned long dr7 = 0x400;
- int old_singlestep;
-
- old_singlestep = vcpu->guest_debug.singlestep;
-
- vcpu->guest_debug.enabled = dbg->enabled;
- if (vcpu->guest_debug.enabled) {
- int i;
-
- dr7 |= 0x200; /* exact */
- for (i = 0; i < 4; ++i) {
- if (!dbg->breakpoints[i].enabled)
- continue;
- vcpu->guest_debug.bp[i] = dbg->breakpoints[i].address;
- dr7 |= 2 << (i*2); /* global enable */
- dr7 |= 0 << (i*4+16); /* execution breakpoint */
- }
-
- vcpu->guest_debug.singlestep = dbg->singlestep;
- } else
- vcpu->guest_debug.singlestep = 0;
-
- if (old_singlestep && !vcpu->guest_debug.singlestep) {
- unsigned long flags;
-
- flags = vmcs_readl(GUEST_RFLAGS);
- flags &= ~(X86_EFLAGS_TF | X86_EFLAGS_RF);
- vmcs_writel(GUEST_RFLAGS, flags);
- }
-
- update_exception_bitmap(vcpu);
- vmcs_writel(GUEST_DR7, dr7);
-
- return 0;
-}
-
-static int vmx_get_irq(struct kvm_vcpu *vcpu)
-{
- struct vcpu_vmx *vmx = to_vmx(vcpu);
- u32 idtv_info_field;
-
- idtv_info_field = vmx->idt_vectoring_info;
- if (idtv_info_field & INTR_INFO_VALID_MASK) {
- if (is_external_interrupt(idtv_info_field))
- return idtv_info_field & VECTORING_INFO_VECTOR_MASK;
- else
- printk(KERN_DEBUG "pending exception: not handled yet\n");
- }
- return -1;
-}
-
-static __init int cpu_has_kvm_support(void)
-{
- unsigned long ecx = cpuid_ecx(1);
- return test_bit(5, &ecx); /* CPUID.1:ECX.VMX[bit 5] -> VT */
-}
-
-static __init int vmx_disabled_by_bios(void)
-{
- u64 msr;
-
- rdmsrl(MSR_IA32_FEATURE_CONTROL, msr);
- return (msr & (MSR_IA32_FEATURE_CONTROL_LOCKED |
- MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED))
- == MSR_IA32_FEATURE_CONTROL_LOCKED;
- /* locked but not enabled */
-}
-
-static void hardware_enable(void *garbage)
-{
- int cpu = raw_smp_processor_id();
- u64 phys_addr = __pa(per_cpu(vmxarea, cpu));
- u64 old;
-
- rdmsrl(MSR_IA32_FEATURE_CONTROL, old);
- if ((old & (MSR_IA32_FEATURE_CONTROL_LOCKED |
- MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED))
- != (MSR_IA32_FEATURE_CONTROL_LOCKED |
- MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED))
- /* enable and lock */
- wrmsrl(MSR_IA32_FEATURE_CONTROL, old |
- MSR_IA32_FEATURE_CONTROL_LOCKED |
- MSR_IA32_FEATURE_CONTROL_VMXON_ENABLED);
- write_cr4(read_cr4() | X86_CR4_VMXE); /* FIXME: not cpu hotplug safe */
- asm volatile (ASM_VMX_VMXON_RAX : : "a"(&phys_addr), "m"(phys_addr)
- : "memory", "cc");
-}
-
-static void hardware_disable(void *garbage)
-{
- asm volatile (ASM_VMX_VMXOFF : : : "cc");
-}
-
-static __init int adjust_vmx_controls(u32 ctl_min, u32 ctl_opt,
- u32 msr, u32 *result)
-{
- u32 vmx_msr_low, vmx_msr_high;
- u32 ctl = ctl_min | ctl_opt;
-
- rdmsr(msr, vmx_msr_low, vmx_msr_high);
-
- ctl &= vmx_msr_high; /* bit == 0 in high word ==> must be zero */
- ctl |= vmx_msr_low; /* bit == 1 in low word ==> must be one */
-
- /* Ensure minimum (required) set of control bits are supported. */
- if (ctl_min & ~ctl)
- return -EIO;
-
- *result = ctl;
- return 0;
-}
-
-static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
-{
- u32 vmx_msr_low, vmx_msr_high;
- u32 min, opt;
- u32 _pin_based_exec_control = 0;
- u32 _cpu_based_exec_control = 0;
- u32 _cpu_based_2nd_exec_control = 0;
- u32 _vmexit_control = 0;
- u32 _vmentry_control = 0;
-
- min = PIN_BASED_EXT_INTR_MASK | PIN_BASED_NMI_EXITING;
- opt = 0;
- if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PINBASED_CTLS,
- &_pin_based_exec_control) < 0)
- return -EIO;
-
- min = CPU_BASED_HLT_EXITING |
-#ifdef CONFIG_X86_64
- CPU_BASED_CR8_LOAD_EXITING |
- CPU_BASED_CR8_STORE_EXITING |
-#endif
- CPU_BASED_USE_IO_BITMAPS |
- CPU_BASED_MOV_DR_EXITING |
- CPU_BASED_USE_TSC_OFFSETING;
- opt = CPU_BASED_TPR_SHADOW |
- CPU_BASED_ACTIVATE_SECONDARY_CONTROLS;
- if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS,
- &_cpu_based_exec_control) < 0)
- return -EIO;
-#ifdef CONFIG_X86_64
- if ((_cpu_based_exec_control & CPU_BASED_TPR_SHADOW))
- _cpu_based_exec_control &= ~CPU_BASED_CR8_LOAD_EXITING &
- ~CPU_BASED_CR8_STORE_EXITING;
-#endif
- if (_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) {
- min = 0;
- opt = SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES |
- SECONDARY_EXEC_WBINVD_EXITING;
- if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS2,
- &_cpu_based_2nd_exec_control) < 0)
- return -EIO;
- }
-#ifndef CONFIG_X86_64
- if (!(_cpu_based_2nd_exec_control &
- SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES))
- _cpu_based_exec_control &= ~CPU_BASED_TPR_SHADOW;
-#endif
-
- min = 0;
-#ifdef CONFIG_X86_64
- min |= VM_EXIT_HOST_ADDR_SPACE_SIZE;
-#endif
- opt = 0;
- if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_EXIT_CTLS,
- &_vmexit_control) < 0)
- return -EIO;
-
- min = opt = 0;
- if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_ENTRY_CTLS,
- &_vmentry_control) < 0)
- return -EIO;
-
- rdmsr(MSR_IA32_VMX_BASIC, vmx_msr_low, vmx_msr_high);
-
- /* IA-32 SDM Vol 3B: VMCS size is never greater than 4kB. */
- if ((vmx_msr_high & 0x1fff) > PAGE_SIZE)
- return -EIO;
-
-#ifdef CONFIG_X86_64
- /* IA-32 SDM Vol 3B: 64-bit CPUs always have VMX_BASIC_MSR[48]==0. */
- if (vmx_msr_high & (1u<<16))
- return -EIO;
-#endif
-
- /* Require Write-Back (WB) memory type for VMCS accesses. */
- if (((vmx_msr_high >> 18) & 15) != 6)
- return -EIO;
-
- vmcs_conf->size = vmx_msr_high & 0x1fff;
- vmcs_conf->order = get_order(vmcs_config.size);
- vmcs_conf->revision_id = vmx_msr_low;
-
- vmcs_conf->pin_based_exec_ctrl = _pin_based_exec_control;
- vmcs_conf->cpu_based_exec_ctrl = _cpu_based_exec_control;
- vmcs_conf->cpu_based_2nd_exec_ctrl = _cpu_based_2nd_exec_control;
- vmcs_conf->vmexit_ctrl = _vmexit_control;
- vmcs_conf->vmentry_ctrl = _vmentry_control;
-
- return 0;
-}
-
-static struct vmcs *alloc_vmcs_cpu(int cpu)
-{
- int node = cpu_to_node(cpu);
- struct page *pages;
- struct vmcs *vmcs;
-
- pages = alloc_pages_node(node, GFP_KERNEL, vmcs_config.order);
- if (!pages)
- return NULL;
- vmcs = page_address(pages);
- memset(vmcs, 0, vmcs_config.size);
- vmcs->revision_id = vmcs_config.revision_id; /* vmcs revision id */
- return vmcs;
-}
-
-static struct vmcs *alloc_vmcs(void)
-{
- return alloc_vmcs_cpu(raw_smp_processor_id());
-}
-
-static void free_vmcs(struct vmcs *vmcs)
-{
- free_pages((unsigned long)vmcs, vmcs_config.order);
-}
-
-static void free_kvm_area(void)
-{
- int cpu;
-
- for_each_online_cpu(cpu)
- free_vmcs(per_cpu(vmxarea, cpu));
-}
-
-static __init int alloc_kvm_area(void)
-{
- int cpu;
-
- for_each_online_cpu(cpu) {
- struct vmcs *vmcs;
-
- vmcs = alloc_vmcs_cpu(cpu);
- if (!vmcs) {
- free_kvm_area();
- return -ENOMEM;
- }
-
- per_cpu(vmxarea, cpu) = vmcs;
- }
- return 0;
-}
-
-static __init int hardware_setup(void)
-{
- if (setup_vmcs_config(&vmcs_config) < 0)
- return -EIO;
- return alloc_kvm_area();
-}
-
-static __exit void hardware_unsetup(void)
-{
- free_kvm_area();
-}
-
-static void fix_pmode_dataseg(int seg, struct kvm_save_segment *save)
-{
- struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
-
- if (vmcs_readl(sf->base) == save->base && (save->base & AR_S_MASK)) {
- vmcs_write16(sf->selector, save->selector);
- vmcs_writel(sf->base, save->base);
- vmcs_write32(sf->limit, save->limit);
- vmcs_write32(sf->ar_bytes, save->ar);
- } else {
- u32 dpl = (vmcs_read16(sf->selector) & SELECTOR_RPL_MASK)
- << AR_DPL_SHIFT;
- vmcs_write32(sf->ar_bytes, 0x93 | dpl);
- }
-}
-
-static void enter_pmode(struct kvm_vcpu *vcpu)
-{
- unsigned long flags;
-
- vcpu->arch.rmode.active = 0;
-
- vmcs_writel(GUEST_TR_BASE, vcpu->arch.rmode.tr.base);
- vmcs_write32(GUEST_TR_LIMIT, vcpu->arch.rmode.tr.limit);
- vmcs_write32(GUEST_TR_AR_BYTES, vcpu->arch.rmode.tr.ar);
-
- flags = vmcs_readl(GUEST_RFLAGS);
- flags &= ~(X86_EFLAGS_IOPL | X86_EFLAGS_VM);
- flags |= (vcpu->arch.rmode.save_iopl << IOPL_SHIFT);
- vmcs_writel(GUEST_RFLAGS, flags);
-
- vmcs_writel(GUEST_CR4, (vmcs_readl(GUEST_CR4) & ~X86_CR4_VME) |
- (vmcs_readl(CR4_READ_SHADOW) & X86_CR4_VME));
-
- update_exception_bitmap(vcpu);
-
- fix_pmode_dataseg(VCPU_SREG_ES, &vcpu->arch.rmode.es);
- fix_pmode_dataseg(VCPU_SREG_DS, &vcpu->arch.rmode.ds);
- fix_pmode_dataseg(VCPU_SREG_GS, &vcpu->arch.rmode.gs);
- fix_pmode_dataseg(VCPU_SREG_FS, &vcpu->arch.rmode.fs);
-
- vmcs_write16(GUEST_SS_SELECTOR, 0);
- vmcs_write32(GUEST_SS_AR_BYTES, 0x93);
-
- vmcs_write16(GUEST_CS_SELECTOR,
- vmcs_read16(GUEST_CS_SELECTOR) & ~SELECTOR_RPL_MASK);
- vmcs_write32(GUEST_CS_AR_BYTES, 0x9b);
-}
-
-static gva_t rmode_tss_base(struct kvm *kvm)
-{
- if (!kvm->arch.tss_addr) {
- gfn_t base_gfn = kvm->memslots[0].base_gfn +
- kvm->memslots[0].npages - 3;
- return base_gfn << PAGE_SHIFT;
- }
- return kvm->arch.tss_addr;
-}
-
-static void fix_rmode_seg(int seg, struct kvm_save_segment *save)
-{
- struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
-
- save->selector = vmcs_read16(sf->selector);
- save->base = vmcs_readl(sf->base);
- save->limit = vmcs_read32(sf->limit);
- save->ar = vmcs_read32(sf->ar_bytes);
- vmcs_write16(sf->selector, save->base >> 4);
- vmcs_write32(sf->base, save->base & 0xfffff);
- vmcs_write32(sf->limit, 0xffff);
- vmcs_write32(sf->ar_bytes, 0xf3);
-}
-
-static void enter_rmode(struct kvm_vcpu *vcpu)
-{
- unsigned long flags;
-
- vcpu->arch.rmode.active = 1;
-
- vcpu->arch.rmode.tr.base = vmcs_readl(GUEST_TR_BASE);
- vmcs_writel(GUEST_TR_BASE, rmode_tss_base(vcpu->kvm));
-
- vcpu->arch.rmode.tr.limit = vmcs_read32(GUEST_TR_LIMIT);
- vmcs_write32(GUEST_TR_LIMIT, RMODE_TSS_SIZE - 1);
-
- vcpu->arch.rmode.tr.ar = vmcs_read32(GUEST_TR_AR_BYTES);
- vmcs_write32(GUEST_TR_AR_BYTES, 0x008b);
-
- flags = vmcs_readl(GUEST_RFLAGS);
- vcpu->arch.rmode.save_iopl
- = (flags & X86_EFLAGS_IOPL) >> IOPL_SHIFT;
-
- flags |= X86_EFLAGS_IOPL | X86_EFLAGS_VM;
-
- vmcs_writel(GUEST_RFLAGS, flags);
- vmcs_writel(GUEST_CR4, vmcs_readl(GUEST_CR4) | X86_CR4_VME);
- update_exception_bitmap(vcpu);
-
- vmcs_write16(GUEST_SS_SELECTOR, vmcs_readl(GUEST_SS_BASE) >> 4);
- vmcs_write32(GUEST_SS_LIMIT, 0xffff);
- vmcs_write32(GUEST_SS_AR_BYTES, 0xf3);
-
- vmcs_write32(GUEST_CS_AR_BYTES, 0xf3);
- vmcs_write32(GUEST_CS_LIMIT, 0xffff);
- if (vmcs_readl(GUEST_CS_BASE) == 0xffff0000)
- vmcs_writel(GUEST_CS_BASE, 0xf0000);
- vmcs_write16(GUEST_CS_SELECTOR, vmcs_readl(GUEST_CS_BASE) >> 4);
-
- fix_rmode_seg(VCPU_SREG_ES, &vcpu->arch.rmode.es);
- fix_rmode_seg(VCPU_SREG_DS, &vcpu->arch.rmode.ds);
- fix_rmode_seg(VCPU_SREG_GS, &vcpu->arch.rmode.gs);
- fix_rmode_seg(VCPU_SREG_FS, &vcpu->arch.rmode.fs);
-
- kvm_mmu_reset_context(vcpu);
- init_rmode_tss(vcpu->kvm);
-}
-
-#ifdef CONFIG_X86_64
-
-static void enter_lmode(struct kvm_vcpu *vcpu)
-{
- u32 guest_tr_ar;
-
- guest_tr_ar = vmcs_read32(GUEST_TR_AR_BYTES);
- if ((guest_tr_ar & AR_TYPE_MASK) != AR_TYPE_BUSY_64_TSS) {
- printk(KERN_DEBUG "%s: tss fixup for long mode. \n",
- __FUNCTION__);
- vmcs_write32(GUEST_TR_AR_BYTES,
- (guest_tr_ar & ~AR_TYPE_MASK)
- | AR_TYPE_BUSY_64_TSS);
- }
-
- vcpu->arch.shadow_efer |= EFER_LMA;
-
- find_msr_entry(to_vmx(vcpu), MSR_EFER)->data |= EFER_LMA | EFER_LME;
- vmcs_write32(VM_ENTRY_CONTROLS,
- vmcs_read32(VM_ENTRY_CONTROLS)
- | VM_ENTRY_IA32E_MODE);
-}
-
-static void exit_lmode(struct kvm_vcpu *vcpu)
-{
- vcpu->arch.shadow_efer &= ~EFER_LMA;
-
- vmcs_write32(VM_ENTRY_CONTROLS,
- vmcs_read32(VM_ENTRY_CONTROLS)
- & ~VM_ENTRY_IA32E_MODE);
-}
-
-#endif
-
-static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
-{
- vcpu->arch.cr4 &= KVM_GUEST_CR4_MASK;
- vcpu->arch.cr4 |= vmcs_readl(GUEST_CR4) & ~KVM_GUEST_CR4_MASK;
-}
-
-static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
-{
- vmx_fpu_deactivate(vcpu);
-
- if (vcpu->arch.rmode.active && (cr0 & X86_CR0_PE))
- enter_pmode(vcpu);
-
- if (!vcpu->arch.rmode.active && !(cr0 & X86_CR0_PE))
- enter_rmode(vcpu);
-
-#ifdef CONFIG_X86_64
- if (vcpu->arch.shadow_efer & EFER_LME) {
- if (!is_paging(vcpu) && (cr0 & X86_CR0_PG))
- enter_lmode(vcpu);
- if (is_paging(vcpu) && !(cr0 & X86_CR0_PG))
- exit_lmode(vcpu);
- }
-#endif
-
- vmcs_writel(CR0_READ_SHADOW, cr0);
- vmcs_writel(GUEST_CR0,
- (cr0 & ~KVM_GUEST_CR0_MASK) | KVM_VM_CR0_ALWAYS_ON);
- vcpu->arch.cr0 = cr0;
-
- if (!(cr0 & X86_CR0_TS) || !(cr0 & X86_CR0_PE))
- vmx_fpu_activate(vcpu);
-}
-
-static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
-{
- vmcs_writel(GUEST_CR3, cr3);
- if (vcpu->arch.cr0 & X86_CR0_PE)
- vmx_fpu_deactivate(vcpu);
-}
-
-static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
-{
- vmcs_writel(CR4_READ_SHADOW, cr4);
- vmcs_writel(GUEST_CR4, cr4 | (vcpu->arch.rmode.active ?
- KVM_RMODE_VM_CR4_ALWAYS_ON : KVM_PMODE_VM_CR4_ALWAYS_ON));
- vcpu->arch.cr4 = cr4;
-}
-
-#ifdef CONFIG_X86_64
-
-static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer)
-{
- struct vcpu_vmx *vmx = to_vmx(vcpu);
- struct kvm_msr_entry *msr = find_msr_entry(vmx, MSR_EFER);
-
- vcpu->arch.shadow_efer = efer;
- if (efer & EFER_LMA) {
- vmcs_write32(VM_ENTRY_CONTROLS,
- vmcs_read32(VM_ENTRY_CONTROLS) |
- VM_ENTRY_IA32E_MODE);
- msr->data = efer;
-
- } else {
- vmcs_write32(VM_ENTRY_CONTROLS,
- vmcs_read32(VM_ENTRY_CONTROLS) &
- ~VM_ENTRY_IA32E_MODE);
-
- msr->data = efer & ~EFER_LME;
- }
- setup_msrs(vmx);
-}
-
-#endif
-
-static u64 vmx_get_segment_base(struct kvm_vcpu *vcpu, int seg)
-{
- struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
-
- return vmcs_readl(sf->base);
-}
-
-static void vmx_get_segment(struct kvm_vcpu *vcpu,
- struct kvm_segment *var, int seg)
-{
- struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
- u32 ar;
-
- var->base = vmcs_readl(sf->base);
- var->limit = vmcs_read32(sf->limit);
- var->selector = vmcs_read16(sf->selector);
- ar = vmcs_read32(sf->ar_bytes);
- if (ar & AR_UNUSABLE_MASK)
- ar = 0;
- var->type = ar & 15;
- var->s = (ar >> 4) & 1;
- var->dpl = (ar >> 5) & 3;
- var->present = (ar >> 7) & 1;
- var->avl = (ar >> 12) & 1;
- var->l = (ar >> 13) & 1;
- var->db = (ar >> 14) & 1;
- var->g = (ar >> 15) & 1;
- var->unusable = (ar >> 16) & 1;
-}
-
-static u32 vmx_segment_access_rights(struct kvm_segment *var)
-{
- u32 ar;
-
- if (var->unusable)
- ar = 1 << 16;
- else {
- ar = var->type & 15;
- ar |= (var->s & 1) << 4;
- ar |= (var->dpl & 3) << 5;
- ar |= (var->present & 1) << 7;
- ar |= (var->avl & 1) << 12;
- ar |= (var->l & 1) << 13;
- ar |= (var->db & 1) << 14;
- ar |= (var->g & 1) << 15;
- }
- if (ar == 0) /* a 0 value means unusable */
- ar = AR_UNUSABLE_MASK;
-
- return ar;
-}
-
-static void vmx_set_segment(struct kvm_vcpu *vcpu,
- struct kvm_segment *var, int seg)
-{
- struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
- u32 ar;
-
- if (vcpu->arch.rmode.active && seg == VCPU_SREG_TR) {
- vcpu->arch.rmode.tr.selector = var->selector;
- vcpu->arch.rmode.tr.base = var->base;
- vcpu->arch.rmode.tr.limit = var->limit;
- vcpu->arch.rmode.tr.ar = vmx_segment_access_rights(var);
- return;
- }
- vmcs_writel(sf->base, var->base);
- vmcs_write32(sf->limit, var->limit);
- vmcs_write16(sf->selector, var->selector);
- if (vcpu->arch.rmode.active && var->s) {
- /*
- * Hack real-mode segments into vm86 compatibility.
- */
- if (var->base == 0xffff0000 && var->selector == 0xf000)
- vmcs_writel(sf->base, 0xf0000);
- ar = 0xf3;
- } else
- ar = vmx_segment_access_rights(var);
- vmcs_write32(sf->ar_bytes, ar);
-}
-
-static void vmx_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
-{
- u32 ar = vmcs_read32(GUEST_CS_AR_BYTES);
-
- *db = (ar >> 14) & 1;
- *l = (ar >> 13) & 1;
-}
-
-static void vmx_get_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
-{
- dt->limit = vmcs_read32(GUEST_IDTR_LIMIT);
- dt->base = vmcs_readl(GUEST_IDTR_BASE);
-}
-
-static void vmx_set_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
-{
- vmcs_write32(GUEST_IDTR_LIMIT, dt->limit);
- vmcs_writel(GUEST_IDTR_BASE, dt->base);
-}
-
-static void vmx_get_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
-{
- dt->limit = vmcs_read32(GUEST_GDTR_LIMIT);
- dt->base = vmcs_readl(GUEST_GDTR_BASE);
-}
-
-static void vmx_set_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
-{
- vmcs_write32(GUEST_GDTR_LIMIT, dt->limit);
- vmcs_writel(GUEST_GDTR_BASE, dt->base);
-}
-
-static int init_rmode_tss(struct kvm *kvm)
-{
- gfn_t fn = rmode_tss_base(kvm) >> PAGE_SHIFT;
- u16 data = 0;
- int r;
-
- r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE);
- if (r < 0)
- return 0;
- data = TSS_BASE_SIZE + TSS_REDIRECTION_SIZE;
- r = kvm_write_guest_page(kvm, fn++, &data, 0x66, sizeof(u16));
- if (r < 0)
- return 0;
- r = kvm_clear_guest_page(kvm, fn++, 0, PAGE_SIZE);
- if (r < 0)
- return 0;
- r = kvm_clear_guest_page(kvm, fn, 0, PAGE_SIZE);
- if (r < 0)
- return 0;
- data = ~0;
- r = kvm_write_guest_page(kvm, fn, &data, RMODE_TSS_SIZE - 2 * PAGE_SIZE - 1,
- sizeof(u8));
- if (r < 0)
- return 0;
- return 1;
-}
-
-static void seg_setup(int seg)
-{
- struct kvm_vmx_segment_field *sf = &kvm_vmx_segment_fields[seg];
-
- vmcs_write16(sf->selector, 0);
- vmcs_writel(sf->base, 0);
- vmcs_write32(sf->limit, 0xffff);
- vmcs_write32(sf->ar_bytes, 0x93);
-}
-
-static int alloc_apic_access_page(struct kvm *kvm)
-{
- struct kvm_userspace_memory_region kvm_userspace_mem;
- int r = 0;
-
- mutex_lock(&kvm->lock);
- if (kvm->arch.apic_access_page)
- goto out;
- kvm_userspace_mem.slot = APIC_ACCESS_PAGE_PRIVATE_MEMSLOT;
- kvm_userspace_mem.flags = 0;
- kvm_userspace_mem.guest_phys_addr = 0xfee00000ULL;
- kvm_userspace_mem.memory_size = PAGE_SIZE;
- r = __kvm_set_memory_region(kvm, &kvm_userspace_mem, 0);
- if (r)
- goto out;
- kvm->arch.apic_access_page = gfn_to_page(kvm, 0xfee00);
-out:
- mutex_unlock(&kvm->lock);
- return r;
-}
-
-/*
- * Sets up the vmcs for emulated real mode.
- */
-static int vmx_vcpu_setup(struct vcpu_vmx *vmx)
-{
- u32 host_sysenter_cs;
- u32 junk;
- unsigned long a;
- struct descriptor_table dt;
- int i;
- unsigned long kvm_vmx_return;
- u32 exec_control;
-
- /* I/O */
- vmcs_write64(IO_BITMAP_A, page_to_phys(vmx_io_bitmap_a));
- vmcs_write64(IO_BITMAP_B, page_to_phys(vmx_io_bitmap_b));
-
- vmcs_write64(VMCS_LINK_POINTER, -1ull); /* 22.3.1.5 */
-
- /* Control */
- vmcs_write32(PIN_BASED_VM_EXEC_CONTROL,
- vmcs_config.pin_based_exec_ctrl);
-
- exec_control = vmcs_config.cpu_based_exec_ctrl;
- if (!vm_need_tpr_shadow(vmx->vcpu.kvm)) {
- exec_control &= ~CPU_BASED_TPR_SHADOW;
-#ifdef CONFIG_X86_64
- exec_control |= CPU_BASED_CR8_STORE_EXITING |
- CPU_BASED_CR8_LOAD_EXITING;
-#endif
- }
- vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, exec_control);
-
- if (cpu_has_secondary_exec_ctrls()) {
- exec_control = vmcs_config.cpu_based_2nd_exec_ctrl;
- if (!vm_need_virtualize_apic_accesses(vmx->vcpu.kvm))
- exec_control &=
- ~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
- vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control);
- }
-
- vmcs_write32(PAGE_FAULT_ERROR_CODE_MASK, !!bypass_guest_pf);
- vmcs_write32(PAGE_FAULT_ERROR_CODE_MATCH, !!bypass_guest_pf);
- vmcs_write32(CR3_TARGET_COUNT, 0); /* 22.2.1 */
-
- vmcs_writel(HOST_CR0, read_cr0()); /* 22.2.3 */
- vmcs_writel(HOST_CR4, read_cr4()); /* 22.2.3, 22.2.5 */
- vmcs_writel(HOST_CR3, read_cr3()); /* 22.2.3 FIXME: shadow tables */
-
- vmcs_write16(HOST_CS_SELECTOR, __KERNEL_CS); /* 22.2.4 */
- vmcs_write16(HOST_DS_SELECTOR, __KERNEL_DS); /* 22.2.4 */
- vmcs_write16(HOST_ES_SELECTOR, __KERNEL_DS); /* 22.2.4 */
- vmcs_write16(HOST_FS_SELECTOR, read_fs()); /* 22.2.4 */
- vmcs_write16(HOST_GS_SELECTOR, read_gs()); /* 22.2.4 */
- vmcs_write16(HOST_SS_SELECTOR, __KERNEL_DS); /* 22.2.4 */
-#ifdef CONFIG_X86_64
- rdmsrl(MSR_FS_BASE, a);
- vmcs_writel(HOST_FS_BASE, a); /* 22.2.4 */
- rdmsrl(MSR_GS_BASE, a);
- vmcs_writel(HOST_GS_BASE, a); /* 22.2.4 */
-#else
- vmcs_writel(HOST_FS_BASE, 0); /* 22.2.4 */
- vmcs_writel(HOST_GS_BASE, 0); /* 22.2.4 */
-#endif
-
- vmcs_write16(HOST_TR_SELECTOR, GDT_ENTRY_TSS*8); /* 22.2.4 */
-
- get_idt(&dt);
- vmcs_writel(HOST_IDTR_BASE, dt.base); /* 22.2.4 */
-
- asm("mov $.Lkvm_vmx_return, %0" : "=r"(kvm_vmx_return));
- vmcs_writel(HOST_RIP, kvm_vmx_return); /* 22.2.5 */
- vmcs_write32(VM_EXIT_MSR_STORE_COUNT, 0);
- vmcs_write32(VM_EXIT_MSR_LOAD_COUNT, 0);
- vmcs_write32(VM_ENTRY_MSR_LOAD_COUNT, 0);
-
- rdmsr(MSR_IA32_SYSENTER_CS, host_sysenter_cs, junk);
- vmcs_write32(HOST_IA32_SYSENTER_CS, host_sysenter_cs);
- rdmsrl(MSR_IA32_SYSENTER_ESP, a);
- vmcs_writel(HOST_IA32_SYSENTER_ESP, a); /* 22.2.3 */
- rdmsrl(MSR_IA32_SYSENTER_EIP, a);
- vmcs_writel(HOST_IA32_SYSENTER_EIP, a); /* 22.2.3 */
-
- for (i = 0; i < NR_VMX_MSR; ++i) {
- u32 index = vmx_msr_index[i];
- u32 data_low, data_high;
- u64 data;
- int j = vmx->nmsrs;
-
- 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);
- vmx->host_msrs[j].index = index;
- vmx->host_msrs[j].reserved = 0;
- vmx->host_msrs[j].data = data;
- vmx->guest_msrs[j] = vmx->host_msrs[j];
- ++vmx->nmsrs;
- }
-
- vmcs_write32(VM_EXIT_CONTROLS, vmcs_config.vmexit_ctrl);
-
- /* 22.2.1, 20.8.1 */
- vmcs_write32(VM_ENTRY_CONTROLS, vmcs_config.vmentry_ctrl);
-
- vmcs_writel(CR0_GUEST_HOST_MASK, ~0UL);
- vmcs_writel(CR4_GUEST_HOST_MASK, KVM_GUEST_CR4_MASK);
-
- if (vm_need_virtualize_apic_accesses(vmx->vcpu.kvm))
- if (alloc_apic_access_page(vmx->vcpu.kvm) != 0)
- return -ENOMEM;
-
- return 0;
-}
-
-static int vmx_vcpu_reset(struct kvm_vcpu *vcpu)
-{
- struct vcpu_vmx *vmx = to_vmx(vcpu);
- u64 msr;
- int ret;
-
- if (!init_rmode_tss(vmx->vcpu.kvm)) {
- ret = -ENOMEM;
- goto out;
- }
-
- vmx->vcpu.arch.rmode.active = 0;
-
- vmx->vcpu.arch.regs[VCPU_REGS_RDX] = get_rdx_init_val();
- set_cr8(&vmx->vcpu, 0);
- msr = 0xfee00000 | MSR_IA32_APICBASE_ENABLE;
- if (vmx->vcpu.vcpu_id == 0)
- msr |= MSR_IA32_APICBASE_BSP;
- kvm_set_apic_base(&vmx->vcpu, msr);
-
- fx_init(&vmx->vcpu);
-
- /*
- * GUEST_CS_BASE should really be 0xffff0000, but VT vm86 mode
- * insists on having GUEST_CS_BASE == GUEST_CS_SELECTOR << 4. Sigh.
- */
- if (vmx->vcpu.vcpu_id == 0) {
- vmcs_write16(GUEST_CS_SELECTOR, 0xf000);
- vmcs_writel(GUEST_CS_BASE, 0x000f0000);
- } else {
- vmcs_write16(GUEST_CS_SELECTOR, vmx->vcpu.arch.sipi_vector << 8);
- vmcs_writel(GUEST_CS_BASE, vmx->vcpu.arch.sipi_vector << 12);
- }
- vmcs_write32(GUEST_CS_LIMIT, 0xffff);
- vmcs_write32(GUEST_CS_AR_BYTES, 0x9b);
-
- seg_setup(VCPU_SREG_DS);
- seg_setup(VCPU_SREG_ES);
- seg_setup(VCPU_SREG_FS);
- seg_setup(VCPU_SREG_GS);
- seg_setup(VCPU_SREG_SS);
-
- vmcs_write16(GUEST_TR_SELECTOR, 0);
- vmcs_writel(GUEST_TR_BASE, 0);
- vmcs_write32(GUEST_TR_LIMIT, 0xffff);
- vmcs_write32(GUEST_TR_AR_BYTES, 0x008b);
-
- vmcs_write16(GUEST_LDTR_SELECTOR, 0);
- vmcs_writel(GUEST_LDTR_BASE, 0);
- vmcs_write32(GUEST_LDTR_LIMIT, 0xffff);
- vmcs_write32(GUEST_LDTR_AR_BYTES, 0x00082);
-
- vmcs_write32(GUEST_SYSENTER_CS, 0);
- vmcs_writel(GUEST_SYSENTER_ESP, 0);
- vmcs_writel(GUEST_SYSENTER_EIP, 0);
-
- vmcs_writel(GUEST_RFLAGS, 0x02);
- if (vmx->vcpu.vcpu_id == 0)
- vmcs_writel(GUEST_RIP, 0xfff0);
- else
- vmcs_writel(GUEST_RIP, 0);
- vmcs_writel(GUEST_RSP, 0);
-
- /* todo: dr0 = dr1 = dr2 = dr3 = 0; dr6 = 0xffff0ff0 */
- vmcs_writel(GUEST_DR7, 0x400);
-
- vmcs_writel(GUEST_GDTR_BASE, 0);
- vmcs_write32(GUEST_GDTR_LIMIT, 0xffff);
-
- vmcs_writel(GUEST_IDTR_BASE, 0);
- vmcs_write32(GUEST_IDTR_LIMIT, 0xffff);
-
- vmcs_write32(GUEST_ACTIVITY_STATE, 0);
- vmcs_write32(GUEST_INTERRUPTIBILITY_INFO, 0);
- vmcs_write32(GUEST_PENDING_DBG_EXCEPTIONS, 0);
-
- guest_write_tsc(0);
-
- /* Special registers */
- vmcs_write64(GUEST_IA32_DEBUGCTL, 0);
-
- setup_msrs(vmx);
-
- vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, 0); /* 22.2.1 */
-
- if (cpu_has_vmx_tpr_shadow()) {
- vmcs_write64(VIRTUAL_APIC_PAGE_ADDR, 0);
- if (vm_need_tpr_shadow(vmx->vcpu.kvm))
- vmcs_write64(VIRTUAL_APIC_PAGE_ADDR,
- page_to_phys(vmx->vcpu.arch.apic->regs_page));
- vmcs_write32(TPR_THRESHOLD, 0);
- }
-
- if (vm_need_virtualize_apic_accesses(vmx->vcpu.kvm))
- vmcs_write64(APIC_ACCESS_ADDR,
- page_to_phys(vmx->vcpu.kvm->arch.apic_access_page));
-
- vmx->vcpu.arch.cr0 = 0x60000010;
- vmx_set_cr0(&vmx->vcpu, vmx->vcpu.arch.cr0); /* enter rmode */
- vmx_set_cr4(&vmx->vcpu, 0);
-#ifdef CONFIG_X86_64
- vmx_set_efer(&vmx->vcpu, 0);
-#endif
- vmx_fpu_activate(&vmx->vcpu);
- update_exception_bitmap(&vmx->vcpu);
-
- return 0;
-
-out:
- return ret;
-}
-
-static void vmx_inject_irq(struct kvm_vcpu *vcpu, int irq)
-{
- struct vcpu_vmx *vmx = to_vmx(vcpu);
-
- if (vcpu->arch.rmode.active) {
- vmx->rmode.irq.pending = true;
- vmx->rmode.irq.vector = irq;
- vmx->rmode.irq.rip = vmcs_readl(GUEST_RIP);
- vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
- irq | INTR_TYPE_SOFT_INTR | INTR_INFO_VALID_MASK);
- vmcs_write32(VM_ENTRY_INSTRUCTION_LEN, 1);
- vmcs_writel(GUEST_RIP, vmx->rmode.irq.rip - 1);
- return;
- }
- vmcs_write32(VM_ENTRY_INTR_INFO_FIELD,
- irq | INTR_TYPE_EXT_INTR | INTR_INFO_VALID_MASK);
-}
-
-static void kvm_do_inject_irq(struct kvm_vcpu *vcpu)
-{
- int word_index = __ffs(vcpu->arch.irq_summary);
- int bit_index = __ffs(vcpu->arch.irq_pending[word_index]);
- int irq = word_index * BITS_PER_LONG + bit_index;
-
- clear_bit(bit_index, &vcpu->arch.irq_pending[word_index]);
- if (!vcpu->arch.irq_pending[word_index])
- clear_bit(word_index, &vcpu->arch.irq_summary);
- vmx_inject_irq(vcpu, irq);
-}
-
-
-static void do_interrupt_requests(struct kvm_vcpu *vcpu,
- struct kvm_run *kvm_run)
-{
- u32 cpu_based_vm_exec_control;
-
- vcpu->arch.interrupt_window_open =
- ((vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) &&
- (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0);
-
- if (vcpu->arch.interrupt_window_open &&
- vcpu->arch.irq_summary &&
- !(vmcs_read32(VM_ENTRY_INTR_INFO_FIELD) & INTR_INFO_VALID_MASK))
- /*
- * If interrupts enabled, and not blocked by sti or mov ss. Good.
- */
- kvm_do_inject_irq(vcpu);
-
- cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
- if (!vcpu->arch.interrupt_window_open &&
- (vcpu->arch.irq_summary || kvm_run->request_interrupt_window))
- /*
- * Interrupts blocked. Wait for unblock.
- */
- cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING;
- else
- cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING;
- vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
-}
-
-static int vmx_set_tss_addr(struct kvm *kvm, unsigned int addr)
-{
- int ret;
- struct kvm_userspace_memory_region tss_mem = {
- .slot = 8,
- .guest_phys_addr = addr,
- .memory_size = PAGE_SIZE * 3,
- .flags = 0,
- };
-
- ret = kvm_set_memory_region(kvm, &tss_mem, 0);
- if (ret)
- return ret;
- kvm->arch.tss_addr = addr;
- return 0;
-}
-
-static void kvm_guest_debug_pre(struct kvm_vcpu *vcpu)
-{
- struct kvm_guest_debug *dbg = &vcpu->guest_debug;
-
- set_debugreg(dbg->bp[0], 0);
- set_debugreg(dbg->bp[1], 1);
- set_debugreg(dbg->bp[2], 2);
- set_debugreg(dbg->bp[3], 3);
-
- if (dbg->singlestep) {
- unsigned long flags;
-
- flags = vmcs_readl(GUEST_RFLAGS);
- flags |= X86_EFLAGS_TF | X86_EFLAGS_RF;
- vmcs_writel(GUEST_RFLAGS, flags);
- }
-}
-
-static int handle_rmode_exception(struct kvm_vcpu *vcpu,
- int vec, u32 err_code)
-{
- if (!vcpu->arch.rmode.active)
- return 0;
-
- /*
- * Instruction with address size override prefix opcode 0x67
- * Cause the #SS fault with 0 error code in VM86 mode.
- */
- if (((vec == GP_VECTOR) || (vec == SS_VECTOR)) && err_code == 0)
- if (emulate_instruction(vcpu, NULL, 0, 0, 0) == EMULATE_DONE)
- return 1;
- return 0;
-}
-
-static int handle_exception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
-{
- struct vcpu_vmx *vmx = to_vmx(vcpu);
- u32 intr_info, error_code;
- unsigned long cr2, rip;
- u32 vect_info;
- enum emulation_result er;
-
- vect_info = vmx->idt_vectoring_info;
- intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
-
- if ((vect_info & VECTORING_INFO_VALID_MASK) &&
- !is_page_fault(intr_info))
- printk(KERN_ERR "%s: unexpected, vectoring info 0x%x "
- "intr info 0x%x\n", __FUNCTION__, vect_info, intr_info);
-
- if (!irqchip_in_kernel(vcpu->kvm) && is_external_interrupt(vect_info)) {
- int irq = vect_info & VECTORING_INFO_VECTOR_MASK;
- set_bit(irq, vcpu->arch.irq_pending);
- set_bit(irq / BITS_PER_LONG, &vcpu->arch.irq_summary);
- }
-
- if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200) /* nmi */
- return 1; /* already handled by vmx_vcpu_run() */
-
- if (is_no_device(intr_info)) {
- vmx_fpu_activate(vcpu);
- return 1;
- }
-
- if (is_invalid_opcode(intr_info)) {
- er = emulate_instruction(vcpu, kvm_run, 0, 0, 0);
- if (er != EMULATE_DONE)
- kvm_queue_exception(vcpu, UD_VECTOR);
- return 1;
- }
-
- error_code = 0;
- rip = vmcs_readl(GUEST_RIP);
- if (intr_info & INTR_INFO_DELIEVER_CODE_MASK)
- error_code = vmcs_read32(VM_EXIT_INTR_ERROR_CODE);
- if (is_page_fault(intr_info)) {
- cr2 = vmcs_readl(EXIT_QUALIFICATION);
- return kvm_mmu_page_fault(vcpu, cr2, error_code);
- }
-
- if (vcpu->arch.rmode.active &&
- handle_rmode_exception(vcpu, intr_info & INTR_INFO_VECTOR_MASK,
- error_code)) {
- if (vcpu->arch.halt_request) {
- vcpu->arch.halt_request = 0;
- return kvm_emulate_halt(vcpu);
- }
- return 1;
- }
-
- if ((intr_info & (INTR_INFO_INTR_TYPE_MASK | INTR_INFO_VECTOR_MASK)) ==
- (INTR_TYPE_EXCEPTION | 1)) {
- kvm_run->exit_reason = KVM_EXIT_DEBUG;
- return 0;
- }
- kvm_run->exit_reason = KVM_EXIT_EXCEPTION;
- kvm_run->ex.exception = intr_info & INTR_INFO_VECTOR_MASK;
- kvm_run->ex.error_code = error_code;
- return 0;
-}
-
-static int handle_external_interrupt(struct kvm_vcpu *vcpu,
- struct kvm_run *kvm_run)
-{
- ++vcpu->stat.irq_exits;
- return 1;
-}
-
-static int handle_triple_fault(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
-{
- kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
- return 0;
-}
-
-static int handle_io(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
-{
- unsigned long exit_qualification;
- int size, down, in, string, rep;
- unsigned port;
-
- ++vcpu->stat.io_exits;
- exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
- string = (exit_qualification & 16) != 0;
-
- if (string) {
- if (emulate_instruction(vcpu,
- kvm_run, 0, 0, 0) == EMULATE_DO_MMIO)
- return 0;
- return 1;
- }
-
- size = (exit_qualification & 7) + 1;
- in = (exit_qualification & 8) != 0;
- down = (vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_DF) != 0;
- rep = (exit_qualification & 32) != 0;
- port = exit_qualification >> 16;
-
- return kvm_emulate_pio(vcpu, kvm_run, in, size, port);
-}
-
-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;
-}
-
-static int handle_cr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
-{
- unsigned long exit_qualification;
- int cr;
- int reg;
-
- exit_qualification = vmcs_readl(EXIT_QUALIFICATION);
- cr = exit_qualification & 15;
- reg = (exit_qualification >> 8) & 15;
- switch ((exit_qualification >> 4) & 3) {
- case 0: /* mov to cr */
- switch (cr) {
- case 0:
- vcpu_load_rsp_rip(vcpu);
- set_cr0(vcpu, vcpu->arch.regs[reg]);
- skip_emulated_instruction(vcpu);
- return 1;
- case 3:
- vcpu_load_rsp_rip(vcpu);
- set_cr3(vcpu, vcpu->arch.regs[reg]);
- skip_emulated_instruction(vcpu);
- return 1;
- case 4:
- vcpu_load_rsp_rip(vcpu);
- set_cr4(vcpu, vcpu->arch.regs[reg]);
- skip_emulated_instruction(vcpu);
- return 1;
- case 8:
- vcpu_load_rsp_rip(vcpu);
- set_cr8(vcpu, vcpu->arch.regs[reg]);
- skip_emulated_instruction(vcpu);
- if (irqchip_in_kernel(vcpu->kvm))
- return 1;
- kvm_run->exit_reason = KVM_EXIT_SET_TPR;
- return 0;
- };
- break;
- case 2: /* clts */
- vcpu_load_rsp_rip(vcpu);
- vmx_fpu_deactivate(vcpu);
- vcpu->arch.cr0 &= ~X86_CR0_TS;
- vmcs_writel(CR0_READ_SHADOW, vcpu->arch.cr0);
- vmx_fpu_activate(vcpu);
- skip_emulated_instruction(vcpu);
- return 1;
- case 1: /*mov from cr*/
- switch (cr) {
- case 3:
- vcpu_load_rsp_rip(vcpu);
- vcpu->arch.regs[reg] = vcpu->arch.cr3;
- vcpu_put_rsp_rip(vcpu);
- skip_emulated_instruction(vcpu);
- return 1;
- case 8:
- vcpu_load_rsp_rip(vcpu);
- vcpu->arch.regs[reg] = get_cr8(vcpu);
- vcpu_put_rsp_rip(vcpu);
- skip_emulated_instruction(vcpu);
- return 1;
- }
- break;
- case 3: /* lmsw */
- lmsw(vcpu, (exit_qualification >> LMSW_SOURCE_DATA_SHIFT) & 0x0f);
-
- skip_emulated_instruction(vcpu);
- return 1;
- default:
- break;
- }
- kvm_run->exit_reason = 0;
- pr_unimpl(vcpu, "unhandled control register: op %d cr %d\n",
- (int)(exit_qualification >> 4) & 3, cr);
- return 0;
-}
-
-static int handle_dr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
-{
- unsigned long 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_readl(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->arch.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_emulate_cpuid(vcpu);
- return 1;
-}
-
-static int handle_rdmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
-{
- u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX];
- u64 data;
-
- if (vmx_get_msr(vcpu, ecx, &data)) {
- kvm_inject_gp(vcpu, 0);
- return 1;
- }
-
- /* FIXME: handling of bits 32:63 of rax, rdx */
- vcpu->arch.regs[VCPU_REGS_RAX] = data & -1u;
- vcpu->arch.regs[VCPU_REGS_RDX] = (data >> 32) & -1u;
- skip_emulated_instruction(vcpu);
- return 1;
-}
-
-static int handle_wrmsr(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
-{
- u32 ecx = vcpu->arch.regs[VCPU_REGS_RCX];
- u64 data = (vcpu->arch.regs[VCPU_REGS_RAX] & -1u)
- | ((u64)(vcpu->arch.regs[VCPU_REGS_RDX] & -1u) << 32);
-
- if (vmx_set_msr(vcpu, ecx, data) != 0) {
- kvm_inject_gp(vcpu, 0);
- return 1;
- }
-
- skip_emulated_instruction(vcpu);
- return 1;
-}
-
-static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu,
- struct kvm_run *kvm_run)
-{
- return 1;
-}
-
-static int handle_interrupt_window(struct kvm_vcpu *vcpu,
- struct kvm_run *kvm_run)
-{
- u32 cpu_based_vm_exec_control;
-
- /* clear pending irq */
- cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
- cpu_based_vm_exec_control &= ~CPU_BASED_VIRTUAL_INTR_PENDING;
- vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
- /*
- * If the user space waits to inject interrupts, exit as soon as
- * possible
- */
- if (kvm_run->request_interrupt_window &&
- !vcpu->arch.irq_summary) {
- kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
- ++vcpu->stat.irq_window_exits;
- return 0;
- }
- return 1;
-}
-
-static int handle_halt(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
-{
- skip_emulated_instruction(vcpu);
- return kvm_emulate_halt(vcpu);
-}
-
-static int handle_vmcall(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
-{
- skip_emulated_instruction(vcpu);
- kvm_emulate_hypercall(vcpu);
- return 1;
-}
-
-static int handle_wbinvd(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
-{
- skip_emulated_instruction(vcpu);
- /* TODO: Add support for VT-d/pass-through device */
- return 1;
-}
-
-static int handle_apic_access(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
-{
- u64 exit_qualification;
- enum emulation_result er;
- unsigned long offset;
-
- exit_qualification = vmcs_read64(EXIT_QUALIFICATION);
- offset = exit_qualification & 0xffful;
-
- er = emulate_instruction(vcpu, kvm_run, 0, 0, 0);
-
- if (er != EMULATE_DONE) {
- printk(KERN_ERR
- "Fail to handle apic access vmexit! Offset is 0x%lx\n",
- offset);
- return -ENOTSUPP;
- }
- return 1;
-}
-
-/*
- * 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
- * to be done to userspace and return 0.
- */
-static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu,
- struct kvm_run *kvm_run) = {
- [EXIT_REASON_EXCEPTION_NMI] = handle_exception,
- [EXIT_REASON_EXTERNAL_INTERRUPT] = handle_external_interrupt,
- [EXIT_REASON_TRIPLE_FAULT] = handle_triple_fault,
- [EXIT_REASON_IO_INSTRUCTION] = handle_io,
- [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,
- [EXIT_REASON_VMCALL] = handle_vmcall,
- [EXIT_REASON_TPR_BELOW_THRESHOLD] = handle_tpr_below_threshold,
- [EXIT_REASON_APIC_ACCESS] = handle_apic_access,
- [EXIT_REASON_WBINVD] = handle_wbinvd,
-};
-
-static const int kvm_vmx_max_exit_handlers =
- ARRAY_SIZE(kvm_vmx_exit_handlers);
-
-/*
- * The guest has exited. See if we can fix it or if we need userspace
- * assistance.
- */
-static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
-{
- u32 exit_reason = vmcs_read32(VM_EXIT_REASON);
- struct vcpu_vmx *vmx = to_vmx(vcpu);
- u32 vectoring_info = vmx->idt_vectoring_info;
-
- if (unlikely(vmx->fail)) {
- kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
- kvm_run->fail_entry.hardware_entry_failure_reason
- = vmcs_read32(VM_INSTRUCTION_ERROR);
- return 0;
- }
-
- if ((vectoring_info & VECTORING_INFO_VALID_MASK) &&
- exit_reason != EXIT_REASON_EXCEPTION_NMI)
- printk(KERN_WARNING "%s: unexpected, valid vectoring info and "
- "exit reason is 0x%x\n", __FUNCTION__, exit_reason);
- if (exit_reason < kvm_vmx_max_exit_handlers
- && kvm_vmx_exit_handlers[exit_reason])
- return kvm_vmx_exit_handlers[exit_reason](vcpu, kvm_run);
- else {
- kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
- kvm_run->hw.hardware_exit_reason = exit_reason;
- }
- return 0;
-}
-
-static void vmx_flush_tlb(struct kvm_vcpu *vcpu)
-{
-}
-
-static void update_tpr_threshold(struct kvm_vcpu *vcpu)
-{
- int max_irr, tpr;
-
- if (!vm_need_tpr_shadow(vcpu->kvm))
- return;
-
- if (!kvm_lapic_enabled(vcpu) ||
- ((max_irr = kvm_lapic_find_highest_irr(vcpu)) == -1)) {
- vmcs_write32(TPR_THRESHOLD, 0);
- return;
- }
-
- tpr = (kvm_lapic_get_cr8(vcpu) & 0x0f) << 4;
- vmcs_write32(TPR_THRESHOLD, (max_irr > tpr) ? tpr >> 4 : max_irr >> 4);
-}
-
-static void enable_irq_window(struct kvm_vcpu *vcpu)
-{
- u32 cpu_based_vm_exec_control;
-
- cpu_based_vm_exec_control = vmcs_read32(CPU_BASED_VM_EXEC_CONTROL);
- cpu_based_vm_exec_control |= CPU_BASED_VIRTUAL_INTR_PENDING;
- vmcs_write32(CPU_BASED_VM_EXEC_CONTROL, cpu_based_vm_exec_control);
-}
-
-static void vmx_intr_assist(struct kvm_vcpu *vcpu)
-{
- struct vcpu_vmx *vmx = to_vmx(vcpu);
- u32 idtv_info_field, intr_info_field;
- int has_ext_irq, interrupt_window_open;
- int vector;
-
- update_tpr_threshold(vcpu);
-
- has_ext_irq = kvm_cpu_has_interrupt(vcpu);
- intr_info_field = vmcs_read32(VM_ENTRY_INTR_INFO_FIELD);
- idtv_info_field = vmx->idt_vectoring_info;
- if (intr_info_field & INTR_INFO_VALID_MASK) {
- if (idtv_info_field & INTR_INFO_VALID_MASK) {
- /* TODO: fault when IDT_Vectoring */
- if (printk_ratelimit())
- printk(KERN_ERR "Fault when IDT_Vectoring\n");
- }
- if (has_ext_irq)
- enable_irq_window(vcpu);
- return;
- }
- if (unlikely(idtv_info_field & INTR_INFO_VALID_MASK)) {
- if ((idtv_info_field & VECTORING_INFO_TYPE_MASK)
- == INTR_TYPE_EXT_INTR
- && vcpu->arch.rmode.active) {
- u8 vect = idtv_info_field & VECTORING_INFO_VECTOR_MASK;
-
- vmx_inject_irq(vcpu, vect);
- if (unlikely(has_ext_irq))
- enable_irq_window(vcpu);
- return;
- }
-
- vmcs_write32(VM_ENTRY_INTR_INFO_FIELD, idtv_info_field);
- vmcs_write32(VM_ENTRY_INSTRUCTION_LEN,
- vmcs_read32(VM_EXIT_INSTRUCTION_LEN));
-
- if (unlikely(idtv_info_field & INTR_INFO_DELIEVER_CODE_MASK))
- vmcs_write32(VM_ENTRY_EXCEPTION_ERROR_CODE,
- vmcs_read32(IDT_VECTORING_ERROR_CODE));
- if (unlikely(has_ext_irq))
- enable_irq_window(vcpu);
- return;
- }
- if (!has_ext_irq)
- return;
- interrupt_window_open =
- ((vmcs_readl(GUEST_RFLAGS) & X86_EFLAGS_IF) &&
- (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0);
- if (interrupt_window_open) {
- vector = kvm_cpu_get_interrupt(vcpu);
- vmx_inject_irq(vcpu, vector);
- kvm_timer_intr_post(vcpu, vector);
- } else
- enable_irq_window(vcpu);
-}
-
-/*
- * Failure to inject an interrupt should give us the information
- * in IDT_VECTORING_INFO_FIELD. However, if the failure occurs
- * when fetching the interrupt redirection bitmap in the real-mode
- * tss, this doesn't happen. So we do it ourselves.
- */
-static void fixup_rmode_irq(struct vcpu_vmx *vmx)
-{
- vmx->rmode.irq.pending = 0;
- if (vmcs_readl(GUEST_RIP) + 1 != vmx->rmode.irq.rip)
- return;
- vmcs_writel(GUEST_RIP, vmx->rmode.irq.rip);
- if (vmx->idt_vectoring_info & VECTORING_INFO_VALID_MASK) {
- vmx->idt_vectoring_info &= ~VECTORING_INFO_TYPE_MASK;
- vmx->idt_vectoring_info |= INTR_TYPE_EXT_INTR;
- return;
- }
- vmx->idt_vectoring_info =
- VECTORING_INFO_VALID_MASK
- | INTR_TYPE_EXT_INTR
- | vmx->rmode.irq.vector;
-}
-
-static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
-{
- struct vcpu_vmx *vmx = to_vmx(vcpu);
- u32 intr_info;
-
- /*
- * Loading guest fpu may have cleared host cr0.ts
- */
- vmcs_writel(HOST_CR0, read_cr0());
-
- asm(
- /* Store host registers */
-#ifdef CONFIG_X86_64
- "push %%rdx; push %%rbp;"
- "push %%rcx \n\t"
-#else
- "push %%edx; push %%ebp;"
- "push %%ecx \n\t"
-#endif
- ASM_VMX_VMWRITE_RSP_RDX "\n\t"
- /* Check if vmlaunch of vmresume is needed */
- "cmpl $0, %c[launched](%0) \n\t"
- /* Load guest registers. Don't clobber flags. */
-#ifdef CONFIG_X86_64
- "mov %c[cr2](%0), %%rax \n\t"
- "mov %%rax, %%cr2 \n\t"
- "mov %c[rax](%0), %%rax \n\t"
- "mov %c[rbx](%0), %%rbx \n\t"
- "mov %c[rdx](%0), %%rdx \n\t"
- "mov %c[rsi](%0), %%rsi \n\t"
- "mov %c[rdi](%0), %%rdi \n\t"
- "mov %c[rbp](%0), %%rbp \n\t"
- "mov %c[r8](%0), %%r8 \n\t"
- "mov %c[r9](%0), %%r9 \n\t"
- "mov %c[r10](%0), %%r10 \n\t"
- "mov %c[r11](%0), %%r11 \n\t"
- "mov %c[r12](%0), %%r12 \n\t"
- "mov %c[r13](%0), %%r13 \n\t"
- "mov %c[r14](%0), %%r14 \n\t"
- "mov %c[r15](%0), %%r15 \n\t"
- "mov %c[rcx](%0), %%rcx \n\t" /* kills %0 (rcx) */
-#else
- "mov %c[cr2](%0), %%eax \n\t"
- "mov %%eax, %%cr2 \n\t"
- "mov %c[rax](%0), %%eax \n\t"
- "mov %c[rbx](%0), %%ebx \n\t"
- "mov %c[rdx](%0), %%edx \n\t"
- "mov %c[rsi](%0), %%esi \n\t"
- "mov %c[rdi](%0), %%edi \n\t"
- "mov %c[rbp](%0), %%ebp \n\t"
- "mov %c[rcx](%0), %%ecx \n\t" /* kills %0 (ecx) */
-#endif
- /* Enter guest mode */
- "jne .Llaunched \n\t"
- ASM_VMX_VMLAUNCH "\n\t"
- "jmp .Lkvm_vmx_return \n\t"
- ".Llaunched: " ASM_VMX_VMRESUME "\n\t"
- ".Lkvm_vmx_return: "
- /* Save guest registers, load host registers, keep flags */
-#ifdef CONFIG_X86_64
- "xchg %0, (%%rsp) \n\t"
- "mov %%rax, %c[rax](%0) \n\t"
- "mov %%rbx, %c[rbx](%0) \n\t"
- "pushq (%%rsp); popq %c[rcx](%0) \n\t"
- "mov %%rdx, %c[rdx](%0) \n\t"
- "mov %%rsi, %c[rsi](%0) \n\t"
- "mov %%rdi, %c[rdi](%0) \n\t"
- "mov %%rbp, %c[rbp](%0) \n\t"
- "mov %%r8, %c[r8](%0) \n\t"
- "mov %%r9, %c[r9](%0) \n\t"
- "mov %%r10, %c[r10](%0) \n\t"
- "mov %%r11, %c[r11](%0) \n\t"
- "mov %%r12, %c[r12](%0) \n\t"
- "mov %%r13, %c[r13](%0) \n\t"
- "mov %%r14, %c[r14](%0) \n\t"
- "mov %%r15, %c[r15](%0) \n\t"
- "mov %%cr2, %%rax \n\t"
- "mov %%rax, %c[cr2](%0) \n\t"
-
- "pop %%rbp; pop %%rbp; pop %%rdx \n\t"
-#else
- "xchg %0, (%%esp) \n\t"
- "mov %%eax, %c[rax](%0) \n\t"
- "mov %%ebx, %c[rbx](%0) \n\t"
- "pushl (%%esp); popl %c[rcx](%0) \n\t"
- "mov %%edx, %c[rdx](%0) \n\t"
- "mov %%esi, %c[rsi](%0) \n\t"
- "mov %%edi, %c[rdi](%0) \n\t"
- "mov %%ebp, %c[rbp](%0) \n\t"
- "mov %%cr2, %%eax \n\t"
- "mov %%eax, %c[cr2](%0) \n\t"
-
- "pop %%ebp; pop %%ebp; pop %%edx \n\t"
-#endif
- "setbe %c[fail](%0) \n\t"
- : : "c"(vmx), "d"((unsigned long)HOST_RSP),
- [launched]"i"(offsetof(struct vcpu_vmx, launched)),
- [fail]"i"(offsetof(struct vcpu_vmx, fail)),
- [rax]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RAX])),
- [rbx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBX])),
- [rcx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RCX])),
- [rdx]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDX])),
- [rsi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RSI])),
- [rdi]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RDI])),
- [rbp]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_RBP])),
-#ifdef CONFIG_X86_64
- [r8]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R8])),
- [r9]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R9])),
- [r10]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R10])),
- [r11]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R11])),
- [r12]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R12])),
- [r13]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R13])),
- [r14]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R14])),
- [r15]"i"(offsetof(struct vcpu_vmx, vcpu.arch.regs[VCPU_REGS_R15])),
-#endif
- [cr2]"i"(offsetof(struct vcpu_vmx, vcpu.arch.cr2))
- : "cc", "memory"
-#ifdef CONFIG_X86_64
- , "rbx", "rdi", "rsi"
- , "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
-#else
- , "ebx", "edi", "rsi"
-#endif
- );
-
- vmx->idt_vectoring_info = vmcs_read32(IDT_VECTORING_INFO_FIELD);
- if (vmx->rmode.irq.pending)
- fixup_rmode_irq(vmx);
-
- vcpu->arch.interrupt_window_open =
- (vmcs_read32(GUEST_INTERRUPTIBILITY_INFO) & 3) == 0;
-
- asm("mov %0, %%ds; mov %0, %%es" : : "r"(__USER_DS));
- vmx->launched = 1;
-
- intr_info = vmcs_read32(VM_EXIT_INTR_INFO);
-
- /* We need to handle NMIs before interrupts are enabled */
- if ((intr_info & INTR_INFO_INTR_TYPE_MASK) == 0x200) /* nmi */
- asm("int $2");
-}
-
-static void vmx_free_vmcs(struct kvm_vcpu *vcpu)
-{
- struct vcpu_vmx *vmx = to_vmx(vcpu);
-
- if (vmx->vmcs) {
- on_each_cpu(__vcpu_clear, vmx, 0, 1);
- free_vmcs(vmx->vmcs);
- vmx->vmcs = NULL;
- }
-}
-
-static void vmx_free_vcpu(struct kvm_vcpu *vcpu)
-{
- struct vcpu_vmx *vmx = to_vmx(vcpu);
-
- vmx_free_vmcs(vcpu);
- kfree(vmx->host_msrs);
- kfree(vmx->guest_msrs);
- kvm_vcpu_uninit(vcpu);
- kmem_cache_free(kvm_vcpu_cache, vmx);
-}
-
-static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id)
-{
- int err;
- struct vcpu_vmx *vmx = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
- int cpu;
-
- if (!vmx)
- return ERR_PTR(-ENOMEM);
-
- err = kvm_vcpu_init(&vmx->vcpu, kvm, id);
- if (err)
- goto free_vcpu;
-
- vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL);
- if (!vmx->guest_msrs) {
- err = -ENOMEM;
- goto uninit_vcpu;
- }
-
- vmx->host_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL);
- if (!vmx->host_msrs)
- goto free_guest_msrs;
-
- vmx->vmcs = alloc_vmcs();
- if (!vmx->vmcs)
- goto free_msrs;
-
- vmcs_clear(vmx->vmcs);
-
- cpu = get_cpu();
- vmx_vcpu_load(&vmx->vcpu, cpu);
- err = vmx_vcpu_setup(vmx);
- vmx_vcpu_put(&vmx->vcpu);
- put_cpu();
- if (err)
- goto free_vmcs;
-
- return &vmx->vcpu;
-
-free_vmcs:
- free_vmcs(vmx->vmcs);
-free_msrs:
- kfree(vmx->host_msrs);
-free_guest_msrs:
- kfree(vmx->guest_msrs);
-uninit_vcpu:
- kvm_vcpu_uninit(&vmx->vcpu);
-free_vcpu:
- kmem_cache_free(kvm_vcpu_cache, vmx);
- return ERR_PTR(err);
-}
-
-static void __init vmx_check_processor_compat(void *rtn)
-{
- struct vmcs_config vmcs_conf;
-
- *(int *)rtn = 0;
- if (setup_vmcs_config(&vmcs_conf) < 0)
- *(int *)rtn = -EIO;
- if (memcmp(&vmcs_config, &vmcs_conf, sizeof(struct vmcs_config)) != 0) {
- printk(KERN_ERR "kvm: CPU %d feature inconsistency!\n",
- smp_processor_id());
- *(int *)rtn = -EIO;
- }
-}
-
-static struct kvm_x86_ops vmx_x86_ops = {
- .cpu_has_kvm_support = cpu_has_kvm_support,
- .disabled_by_bios = vmx_disabled_by_bios,
- .hardware_setup = hardware_setup,
- .hardware_unsetup = hardware_unsetup,
- .check_processor_compatibility = vmx_check_processor_compat,
- .hardware_enable = hardware_enable,
- .hardware_disable = hardware_disable,
-
- .vcpu_create = vmx_create_vcpu,
- .vcpu_free = vmx_free_vcpu,
- .vcpu_reset = vmx_vcpu_reset,
-
- .prepare_guest_switch = vmx_save_host_state,
- .vcpu_load = vmx_vcpu_load,
- .vcpu_put = vmx_vcpu_put,
- .vcpu_decache = vmx_vcpu_decache,
-
- .set_guest_debug = set_guest_debug,
- .guest_debug_pre = kvm_guest_debug_pre,
- .get_msr = vmx_get_msr,
- .set_msr = vmx_set_msr,
- .get_segment_base = vmx_get_segment_base,
- .get_segment = vmx_get_segment,
- .set_segment = vmx_set_segment,
- .get_cs_db_l_bits = vmx_get_cs_db_l_bits,
- .decache_cr4_guest_bits = vmx_decache_cr4_guest_bits,
- .set_cr0 = vmx_set_cr0,
- .set_cr3 = vmx_set_cr3,
- .set_cr4 = vmx_set_cr4,
-#ifdef CONFIG_X86_64
- .set_efer = vmx_set_efer,
-#endif
- .get_idt = vmx_get_idt,
- .set_idt = vmx_set_idt,
- .get_gdt = vmx_get_gdt,
- .set_gdt = vmx_set_gdt,
- .cache_regs = vcpu_load_rsp_rip,
- .decache_regs = vcpu_put_rsp_rip,
- .get_rflags = vmx_get_rflags,
- .set_rflags = vmx_set_rflags,
-
- .tlb_flush = vmx_flush_tlb,
-
- .run = vmx_vcpu_run,
- .handle_exit = kvm_handle_exit,
- .skip_emulated_instruction = skip_emulated_instruction,
- .patch_hypercall = vmx_patch_hypercall,
- .get_irq = vmx_get_irq,
- .set_irq = vmx_inject_irq,
- .queue_exception = vmx_queue_exception,
- .exception_injected = vmx_exception_injected,
- .inject_pending_irq = vmx_intr_assist,
- .inject_pending_vectors = do_interrupt_requests,
-
- .set_tss_addr = vmx_set_tss_addr,
-};
-
-static int __init vmx_init(void)
-{
- void *iova;
- int r;
-
- vmx_io_bitmap_a = alloc_page(GFP_KERNEL | __GFP_HIGHMEM);
- if (!vmx_io_bitmap_a)
- return -ENOMEM;
-
- vmx_io_bitmap_b = alloc_page(GFP_KERNEL | __GFP_HIGHMEM);
- if (!vmx_io_bitmap_b) {
- r = -ENOMEM;
- goto out;
- }
-
- /*
- * Allow direct access to the PC debug port (it is often used for I/O
- * delays, but the vmexits simply slow things down).
- */
- iova = kmap(vmx_io_bitmap_a);
- memset(iova, 0xff, PAGE_SIZE);
- clear_bit(0x80, iova);
- kunmap(vmx_io_bitmap_a);
-
- iova = kmap(vmx_io_bitmap_b);
- memset(iova, 0xff, PAGE_SIZE);
- kunmap(vmx_io_bitmap_b);
-
- r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx), THIS_MODULE);
- if (r)
- goto out1;
-
- if (bypass_guest_pf)
- kvm_mmu_set_nonpresent_ptes(~0xffeull, 0ull);
-
- return 0;
-
-out1:
- __free_page(vmx_io_bitmap_b);
-out:
- __free_page(vmx_io_bitmap_a);
- return r;
-}
-
-static void __exit vmx_exit(void)
-{
- __free_page(vmx_io_bitmap_b);
- __free_page(vmx_io_bitmap_a);
-
- kvm_exit();
-}
-
-module_init(vmx_init)
-module_exit(vmx_exit)
projects / linux-drm-fsl-dcu.git / blobdiff