+++ /dev/null
-/*
- * Kernel-based Virtual Machine driver for Linux
- *
- * AMD SVM support
- *
- * Copyright (C) 2006 Qumranet, Inc.
- *
- * Authors:
- * Yaniv Kamay <yaniv@qumranet.com>
- * Avi Kivity <avi@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 "x86.h"
-#include "kvm_svm.h"
-#include "x86_emulate.h"
-#include "irq.h"
-#include "mmu.h"
-
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/vmalloc.h>
-#include <linux/highmem.h>
-#include <linux/sched.h>
-
-#include <asm/desc.h>
-
-MODULE_AUTHOR("Qumranet");
-MODULE_LICENSE("GPL");
-
-#define IOPM_ALLOC_ORDER 2
-#define MSRPM_ALLOC_ORDER 1
-
-#define DB_VECTOR 1
-#define UD_VECTOR 6
-#define GP_VECTOR 13
-
-#define DR7_GD_MASK (1 << 13)
-#define DR6_BD_MASK (1 << 13)
-
-#define SEG_TYPE_LDT 2
-#define SEG_TYPE_BUSY_TSS16 3
-
-#define SVM_FEATURE_NPT (1 << 0)
-#define SVM_FEATURE_LBRV (1 << 1)
-#define SVM_DEATURE_SVML (1 << 2)
-
-static void kvm_reput_irq(struct vcpu_svm *svm);
-
-static inline struct vcpu_svm *to_svm(struct kvm_vcpu *vcpu)
-{
- return container_of(vcpu, struct vcpu_svm, vcpu);
-}
-
-unsigned long iopm_base;
-unsigned long msrpm_base;
-
-struct kvm_ldttss_desc {
- u16 limit0;
- u16 base0;
- unsigned base1 : 8, type : 5, dpl : 2, p : 1;
- unsigned limit1 : 4, zero0 : 3, g : 1, base2 : 8;
- u32 base3;
- u32 zero1;
-} __attribute__((packed));
-
-struct svm_cpu_data {
- int cpu;
-
- u64 asid_generation;
- u32 max_asid;
- u32 next_asid;
- struct kvm_ldttss_desc *tss_desc;
-
- struct page *save_area;
-};
-
-static DEFINE_PER_CPU(struct svm_cpu_data *, svm_data);
-static uint32_t svm_features;
-
-struct svm_init_data {
- int cpu;
- int r;
-};
-
-static u32 msrpm_ranges[] = {0, 0xc0000000, 0xc0010000};
-
-#define NUM_MSR_MAPS ARRAY_SIZE(msrpm_ranges)
-#define MSRS_RANGE_SIZE 2048
-#define MSRS_IN_RANGE (MSRS_RANGE_SIZE * 8 / 2)
-
-#define MAX_INST_SIZE 15
-
-static inline u32 svm_has(u32 feat)
-{
- return svm_features & feat;
-}
-
-static inline u8 pop_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);
- return irq;
-}
-
-static inline void push_irq(struct kvm_vcpu *vcpu, u8 irq)
-{
- set_bit(irq, vcpu->arch.irq_pending);
- set_bit(irq / BITS_PER_LONG, &vcpu->arch.irq_summary);
-}
-
-static inline void clgi(void)
-{
- asm volatile (SVM_CLGI);
-}
-
-static inline void stgi(void)
-{
- asm volatile (SVM_STGI);
-}
-
-static inline void invlpga(unsigned long addr, u32 asid)
-{
- asm volatile (SVM_INVLPGA :: "a"(addr), "c"(asid));
-}
-
-static inline unsigned long kvm_read_cr2(void)
-{
- unsigned long cr2;
-
- asm volatile ("mov %%cr2, %0" : "=r" (cr2));
- return cr2;
-}
-
-static inline void kvm_write_cr2(unsigned long val)
-{
- asm volatile ("mov %0, %%cr2" :: "r" (val));
-}
-
-static inline unsigned long read_dr6(void)
-{
- unsigned long dr6;
-
- asm volatile ("mov %%dr6, %0" : "=r" (dr6));
- return dr6;
-}
-
-static inline void write_dr6(unsigned long val)
-{
- asm volatile ("mov %0, %%dr6" :: "r" (val));
-}
-
-static inline unsigned long read_dr7(void)
-{
- unsigned long dr7;
-
- asm volatile ("mov %%dr7, %0" : "=r" (dr7));
- return dr7;
-}
-
-static inline void write_dr7(unsigned long val)
-{
- asm volatile ("mov %0, %%dr7" :: "r" (val));
-}
-
-static inline void force_new_asid(struct kvm_vcpu *vcpu)
-{
- to_svm(vcpu)->asid_generation--;
-}
-
-static inline void flush_guest_tlb(struct kvm_vcpu *vcpu)
-{
- force_new_asid(vcpu);
-}
-
-static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer)
-{
- if (!(efer & EFER_LMA))
- efer &= ~EFER_LME;
-
- to_svm(vcpu)->vmcb->save.efer = efer | MSR_EFER_SVME_MASK;
- vcpu->arch.shadow_efer = efer;
-}
-
-static void svm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr,
- bool has_error_code, u32 error_code)
-{
- struct vcpu_svm *svm = to_svm(vcpu);
-
- svm->vmcb->control.event_inj = nr
- | SVM_EVTINJ_VALID
- | (has_error_code ? SVM_EVTINJ_VALID_ERR : 0)
- | SVM_EVTINJ_TYPE_EXEPT;
- svm->vmcb->control.event_inj_err = error_code;
-}
-
-static bool svm_exception_injected(struct kvm_vcpu *vcpu)
-{
- struct vcpu_svm *svm = to_svm(vcpu);
-
- return !(svm->vmcb->control.exit_int_info & SVM_EXITINTINFO_VALID);
-}
-
-static int is_external_interrupt(u32 info)
-{
- info &= SVM_EVTINJ_TYPE_MASK | SVM_EVTINJ_VALID;
- return info == (SVM_EVTINJ_VALID | SVM_EVTINJ_TYPE_INTR);
-}
-
-static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
-{
- struct vcpu_svm *svm = to_svm(vcpu);
-
- if (!svm->next_rip) {
- printk(KERN_DEBUG "%s: NOP\n", __FUNCTION__);
- return;
- }
- if (svm->next_rip - svm->vmcb->save.rip > MAX_INST_SIZE)
- printk(KERN_ERR "%s: ip 0x%llx next 0x%llx\n",
- __FUNCTION__,
- svm->vmcb->save.rip,
- svm->next_rip);
-
- vcpu->arch.rip = svm->vmcb->save.rip = svm->next_rip;
- svm->vmcb->control.int_state &= ~SVM_INTERRUPT_SHADOW_MASK;
-
- vcpu->arch.interrupt_window_open = 1;
-}
-
-static int has_svm(void)
-{
- uint32_t eax, ebx, ecx, edx;
-
- if (boot_cpu_data.x86_vendor != X86_VENDOR_AMD) {
- printk(KERN_INFO "has_svm: not amd\n");
- return 0;
- }
-
- cpuid(0x80000000, &eax, &ebx, &ecx, &edx);
- if (eax < SVM_CPUID_FUNC) {
- printk(KERN_INFO "has_svm: can't execute cpuid_8000000a\n");
- return 0;
- }
-
- cpuid(0x80000001, &eax, &ebx, &ecx, &edx);
- if (!(ecx & (1 << SVM_CPUID_FEATURE_SHIFT))) {
- printk(KERN_DEBUG "has_svm: svm not available\n");
- return 0;
- }
- return 1;
-}
-
-static void svm_hardware_disable(void *garbage)
-{
- struct svm_cpu_data *svm_data
- = per_cpu(svm_data, raw_smp_processor_id());
-
- if (svm_data) {
- uint64_t efer;
-
- wrmsrl(MSR_VM_HSAVE_PA, 0);
- rdmsrl(MSR_EFER, efer);
- wrmsrl(MSR_EFER, efer & ~MSR_EFER_SVME_MASK);
- per_cpu(svm_data, raw_smp_processor_id()) = NULL;
- __free_page(svm_data->save_area);
- kfree(svm_data);
- }
-}
-
-static void svm_hardware_enable(void *garbage)
-{
-
- struct svm_cpu_data *svm_data;
- uint64_t efer;
-#ifdef CONFIG_X86_64
- struct desc_ptr gdt_descr;
-#else
- struct desc_ptr gdt_descr;
-#endif
- struct desc_struct *gdt;
- int me = raw_smp_processor_id();
-
- if (!has_svm()) {
- printk(KERN_ERR "svm_cpu_init: err EOPNOTSUPP on %d\n", me);
- return;
- }
- svm_data = per_cpu(svm_data, me);
-
- if (!svm_data) {
- printk(KERN_ERR "svm_cpu_init: svm_data is NULL on %d\n",
- me);
- return;
- }
-
- svm_data->asid_generation = 1;
- svm_data->max_asid = cpuid_ebx(SVM_CPUID_FUNC) - 1;
- svm_data->next_asid = svm_data->max_asid + 1;
- svm_features = cpuid_edx(SVM_CPUID_FUNC);
-
- asm volatile ("sgdt %0" : "=m"(gdt_descr));
- gdt = (struct desc_struct *)gdt_descr.address;
- svm_data->tss_desc = (struct kvm_ldttss_desc *)(gdt + GDT_ENTRY_TSS);
-
- rdmsrl(MSR_EFER, efer);
- wrmsrl(MSR_EFER, efer | MSR_EFER_SVME_MASK);
-
- wrmsrl(MSR_VM_HSAVE_PA,
- page_to_pfn(svm_data->save_area) << PAGE_SHIFT);
-}
-
-static int svm_cpu_init(int cpu)
-{
- struct svm_cpu_data *svm_data;
- int r;
-
- svm_data = kzalloc(sizeof(struct svm_cpu_data), GFP_KERNEL);
- if (!svm_data)
- return -ENOMEM;
- svm_data->cpu = cpu;
- svm_data->save_area = alloc_page(GFP_KERNEL);
- r = -ENOMEM;
- if (!svm_data->save_area)
- goto err_1;
-
- per_cpu(svm_data, cpu) = svm_data;
-
- return 0;
-
-err_1:
- kfree(svm_data);
- return r;
-
-}
-
-static void set_msr_interception(u32 *msrpm, unsigned msr,
- int read, int write)
-{
- int i;
-
- for (i = 0; i < NUM_MSR_MAPS; i++) {
- if (msr >= msrpm_ranges[i] &&
- msr < msrpm_ranges[i] + MSRS_IN_RANGE) {
- u32 msr_offset = (i * MSRS_IN_RANGE + msr -
- msrpm_ranges[i]) * 2;
-
- u32 *base = msrpm + (msr_offset / 32);
- u32 msr_shift = msr_offset % 32;
- u32 mask = ((write) ? 0 : 2) | ((read) ? 0 : 1);
- *base = (*base & ~(0x3 << msr_shift)) |
- (mask << msr_shift);
- return;
- }
- }
- BUG();
-}
-
-static __init int svm_hardware_setup(void)
-{
- int cpu;
- struct page *iopm_pages;
- struct page *msrpm_pages;
- void *iopm_va, *msrpm_va;
- int r;
-
- iopm_pages = alloc_pages(GFP_KERNEL, IOPM_ALLOC_ORDER);
-
- if (!iopm_pages)
- return -ENOMEM;
-
- iopm_va = page_address(iopm_pages);
- memset(iopm_va, 0xff, PAGE_SIZE * (1 << IOPM_ALLOC_ORDER));
- clear_bit(0x80, iopm_va); /* allow direct access to PC debug port */
- iopm_base = page_to_pfn(iopm_pages) << PAGE_SHIFT;
-
-
- msrpm_pages = alloc_pages(GFP_KERNEL, MSRPM_ALLOC_ORDER);
-
- r = -ENOMEM;
- if (!msrpm_pages)
- goto err_1;
-
- msrpm_va = page_address(msrpm_pages);
- memset(msrpm_va, 0xff, PAGE_SIZE * (1 << MSRPM_ALLOC_ORDER));
- msrpm_base = page_to_pfn(msrpm_pages) << PAGE_SHIFT;
-
-#ifdef CONFIG_X86_64
- set_msr_interception(msrpm_va, MSR_GS_BASE, 1, 1);
- set_msr_interception(msrpm_va, MSR_FS_BASE, 1, 1);
- set_msr_interception(msrpm_va, MSR_KERNEL_GS_BASE, 1, 1);
- set_msr_interception(msrpm_va, MSR_LSTAR, 1, 1);
- set_msr_interception(msrpm_va, MSR_CSTAR, 1, 1);
- set_msr_interception(msrpm_va, MSR_SYSCALL_MASK, 1, 1);
-#endif
- set_msr_interception(msrpm_va, MSR_K6_STAR, 1, 1);
- set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_CS, 1, 1);
- set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_ESP, 1, 1);
- set_msr_interception(msrpm_va, MSR_IA32_SYSENTER_EIP, 1, 1);
-
- for_each_online_cpu(cpu) {
- r = svm_cpu_init(cpu);
- if (r)
- goto err_2;
- }
- return 0;
-
-err_2:
- __free_pages(msrpm_pages, MSRPM_ALLOC_ORDER);
- msrpm_base = 0;
-err_1:
- __free_pages(iopm_pages, IOPM_ALLOC_ORDER);
- iopm_base = 0;
- return r;
-}
-
-static __exit void svm_hardware_unsetup(void)
-{
- __free_pages(pfn_to_page(msrpm_base >> PAGE_SHIFT), MSRPM_ALLOC_ORDER);
- __free_pages(pfn_to_page(iopm_base >> PAGE_SHIFT), IOPM_ALLOC_ORDER);
- iopm_base = msrpm_base = 0;
-}
-
-static void init_seg(struct vmcb_seg *seg)
-{
- seg->selector = 0;
- seg->attrib = SVM_SELECTOR_P_MASK | SVM_SELECTOR_S_MASK |
- SVM_SELECTOR_WRITE_MASK; /* Read/Write Data Segment */
- seg->limit = 0xffff;
- seg->base = 0;
-}
-
-static void init_sys_seg(struct vmcb_seg *seg, uint32_t type)
-{
- seg->selector = 0;
- seg->attrib = SVM_SELECTOR_P_MASK | type;
- seg->limit = 0xffff;
- seg->base = 0;
-}
-
-static void init_vmcb(struct vmcb *vmcb)
-{
- struct vmcb_control_area *control = &vmcb->control;
- struct vmcb_save_area *save = &vmcb->save;
-
- control->intercept_cr_read = INTERCEPT_CR0_MASK |
- INTERCEPT_CR3_MASK |
- INTERCEPT_CR4_MASK |
- INTERCEPT_CR8_MASK;
-
- control->intercept_cr_write = INTERCEPT_CR0_MASK |
- INTERCEPT_CR3_MASK |
- INTERCEPT_CR4_MASK |
- INTERCEPT_CR8_MASK;
-
- control->intercept_dr_read = INTERCEPT_DR0_MASK |
- INTERCEPT_DR1_MASK |
- INTERCEPT_DR2_MASK |
- INTERCEPT_DR3_MASK;
-
- control->intercept_dr_write = INTERCEPT_DR0_MASK |
- INTERCEPT_DR1_MASK |
- INTERCEPT_DR2_MASK |
- INTERCEPT_DR3_MASK |
- INTERCEPT_DR5_MASK |
- INTERCEPT_DR7_MASK;
-
- control->intercept_exceptions = (1 << PF_VECTOR) |
- (1 << UD_VECTOR);
-
-
- control->intercept = (1ULL << INTERCEPT_INTR) |
- (1ULL << INTERCEPT_NMI) |
- (1ULL << INTERCEPT_SMI) |
- /*
- * selective cr0 intercept bug?
- * 0: 0f 22 d8 mov %eax,%cr3
- * 3: 0f 20 c0 mov %cr0,%eax
- * 6: 0d 00 00 00 80 or $0x80000000,%eax
- * b: 0f 22 c0 mov %eax,%cr0
- * set cr3 ->interception
- * get cr0 ->interception
- * set cr0 -> no interception
- */
- /* (1ULL << INTERCEPT_SELECTIVE_CR0) | */
- (1ULL << INTERCEPT_CPUID) |
- (1ULL << INTERCEPT_INVD) |
- (1ULL << INTERCEPT_HLT) |
- (1ULL << INTERCEPT_INVLPGA) |
- (1ULL << INTERCEPT_IOIO_PROT) |
- (1ULL << INTERCEPT_MSR_PROT) |
- (1ULL << INTERCEPT_TASK_SWITCH) |
- (1ULL << INTERCEPT_SHUTDOWN) |
- (1ULL << INTERCEPT_VMRUN) |
- (1ULL << INTERCEPT_VMMCALL) |
- (1ULL << INTERCEPT_VMLOAD) |
- (1ULL << INTERCEPT_VMSAVE) |
- (1ULL << INTERCEPT_STGI) |
- (1ULL << INTERCEPT_CLGI) |
- (1ULL << INTERCEPT_SKINIT) |
- (1ULL << INTERCEPT_WBINVD) |
- (1ULL << INTERCEPT_MONITOR) |
- (1ULL << INTERCEPT_MWAIT);
-
- control->iopm_base_pa = iopm_base;
- control->msrpm_base_pa = msrpm_base;
- control->tsc_offset = 0;
- control->int_ctl = V_INTR_MASKING_MASK;
-
- init_seg(&save->es);
- init_seg(&save->ss);
- init_seg(&save->ds);
- init_seg(&save->fs);
- init_seg(&save->gs);
-
- save->cs.selector = 0xf000;
- /* Executable/Readable Code Segment */
- save->cs.attrib = SVM_SELECTOR_READ_MASK | SVM_SELECTOR_P_MASK |
- SVM_SELECTOR_S_MASK | SVM_SELECTOR_CODE_MASK;
- save->cs.limit = 0xffff;
- /*
- * cs.base should really be 0xffff0000, but vmx can't handle that, so
- * be consistent with it.
- *
- * Replace when we have real mode working for vmx.
- */
- save->cs.base = 0xf0000;
-
- save->gdtr.limit = 0xffff;
- save->idtr.limit = 0xffff;
-
- init_sys_seg(&save->ldtr, SEG_TYPE_LDT);
- init_sys_seg(&save->tr, SEG_TYPE_BUSY_TSS16);
-
- save->efer = MSR_EFER_SVME_MASK;
- save->dr6 = 0xffff0ff0;
- save->dr7 = 0x400;
- save->rflags = 2;
- save->rip = 0x0000fff0;
-
- /*
- * cr0 val on cpu init should be 0x60000010, we enable cpu
- * cache by default. the orderly way is to enable cache in bios.
- */
- save->cr0 = 0x00000010 | X86_CR0_PG | X86_CR0_WP;
- save->cr4 = X86_CR4_PAE;
- /* rdx = ?? */
-}
-
-static int svm_vcpu_reset(struct kvm_vcpu *vcpu)
-{
- struct vcpu_svm *svm = to_svm(vcpu);
-
- init_vmcb(svm->vmcb);
-
- if (vcpu->vcpu_id != 0) {
- svm->vmcb->save.rip = 0;
- svm->vmcb->save.cs.base = svm->vcpu.arch.sipi_vector << 12;
- svm->vmcb->save.cs.selector = svm->vcpu.arch.sipi_vector << 8;
- }
-
- return 0;
-}
-
-static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id)
-{
- struct vcpu_svm *svm;
- struct page *page;
- int err;
-
- svm = kmem_cache_zalloc(kvm_vcpu_cache, GFP_KERNEL);
- if (!svm) {
- err = -ENOMEM;
- goto out;
- }
-
- err = kvm_vcpu_init(&svm->vcpu, kvm, id);
- if (err)
- goto free_svm;
-
- page = alloc_page(GFP_KERNEL);
- if (!page) {
- err = -ENOMEM;
- goto uninit;
- }
-
- svm->vmcb = page_address(page);
- clear_page(svm->vmcb);
- svm->vmcb_pa = page_to_pfn(page) << PAGE_SHIFT;
- svm->asid_generation = 0;
- memset(svm->db_regs, 0, sizeof(svm->db_regs));
- init_vmcb(svm->vmcb);
-
- fx_init(&svm->vcpu);
- svm->vcpu.fpu_active = 1;
- svm->vcpu.arch.apic_base = 0xfee00000 | MSR_IA32_APICBASE_ENABLE;
- if (svm->vcpu.vcpu_id == 0)
- svm->vcpu.arch.apic_base |= MSR_IA32_APICBASE_BSP;
-
- return &svm->vcpu;
-
-uninit:
- kvm_vcpu_uninit(&svm->vcpu);
-free_svm:
- kmem_cache_free(kvm_vcpu_cache, svm);
-out:
- return ERR_PTR(err);
-}
-
-static void svm_free_vcpu(struct kvm_vcpu *vcpu)
-{
- struct vcpu_svm *svm = to_svm(vcpu);
-
- __free_page(pfn_to_page(svm->vmcb_pa >> PAGE_SHIFT));
- kvm_vcpu_uninit(vcpu);
- kmem_cache_free(kvm_vcpu_cache, svm);
-}
-
-static void svm_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
-{
- struct vcpu_svm *svm = to_svm(vcpu);
- int i;
-
- if (unlikely(cpu != vcpu->cpu)) {
- u64 tsc_this, delta;
-
- /*
- * Make sure that the guest sees a monotonically
- * increasing TSC.
- */
- rdtscll(tsc_this);
- delta = vcpu->arch.host_tsc - tsc_this;
- svm->vmcb->control.tsc_offset += delta;
- vcpu->cpu = cpu;
- kvm_migrate_apic_timer(vcpu);
- }
-
- for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
- rdmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
-}
-
-static void svm_vcpu_put(struct kvm_vcpu *vcpu)
-{
- struct vcpu_svm *svm = to_svm(vcpu);
- int i;
-
- ++vcpu->stat.host_state_reload;
- for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
- wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
-
- rdtscll(vcpu->arch.host_tsc);
-}
-
-static void svm_vcpu_decache(struct kvm_vcpu *vcpu)
-{
-}
-
-static void svm_cache_regs(struct kvm_vcpu *vcpu)
-{
- struct vcpu_svm *svm = to_svm(vcpu);
-
- vcpu->arch.regs[VCPU_REGS_RAX] = svm->vmcb->save.rax;
- vcpu->arch.regs[VCPU_REGS_RSP] = svm->vmcb->save.rsp;
- vcpu->arch.rip = svm->vmcb->save.rip;
-}
-
-static void svm_decache_regs(struct kvm_vcpu *vcpu)
-{
- struct vcpu_svm *svm = to_svm(vcpu);
- svm->vmcb->save.rax = vcpu->arch.regs[VCPU_REGS_RAX];
- svm->vmcb->save.rsp = vcpu->arch.regs[VCPU_REGS_RSP];
- svm->vmcb->save.rip = vcpu->arch.rip;
-}
-
-static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu)
-{
- return to_svm(vcpu)->vmcb->save.rflags;
-}
-
-static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
-{
- to_svm(vcpu)->vmcb->save.rflags = rflags;
-}
-
-static struct vmcb_seg *svm_seg(struct kvm_vcpu *vcpu, int seg)
-{
- struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;
-
- switch (seg) {
- case VCPU_SREG_CS: return &save->cs;
- case VCPU_SREG_DS: return &save->ds;
- case VCPU_SREG_ES: return &save->es;
- case VCPU_SREG_FS: return &save->fs;
- case VCPU_SREG_GS: return &save->gs;
- case VCPU_SREG_SS: return &save->ss;
- case VCPU_SREG_TR: return &save->tr;
- case VCPU_SREG_LDTR: return &save->ldtr;
- }
- BUG();
- return NULL;
-}
-
-static u64 svm_get_segment_base(struct kvm_vcpu *vcpu, int seg)
-{
- struct vmcb_seg *s = svm_seg(vcpu, seg);
-
- return s->base;
-}
-
-static void svm_get_segment(struct kvm_vcpu *vcpu,
- struct kvm_segment *var, int seg)
-{
- struct vmcb_seg *s = svm_seg(vcpu, seg);
-
- var->base = s->base;
- var->limit = s->limit;
- var->selector = s->selector;
- var->type = s->attrib & SVM_SELECTOR_TYPE_MASK;
- var->s = (s->attrib >> SVM_SELECTOR_S_SHIFT) & 1;
- var->dpl = (s->attrib >> SVM_SELECTOR_DPL_SHIFT) & 3;
- var->present = (s->attrib >> SVM_SELECTOR_P_SHIFT) & 1;
- var->avl = (s->attrib >> SVM_SELECTOR_AVL_SHIFT) & 1;
- var->l = (s->attrib >> SVM_SELECTOR_L_SHIFT) & 1;
- var->db = (s->attrib >> SVM_SELECTOR_DB_SHIFT) & 1;
- var->g = (s->attrib >> SVM_SELECTOR_G_SHIFT) & 1;
- var->unusable = !var->present;
-}
-
-static void svm_get_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
-{
- struct vcpu_svm *svm = to_svm(vcpu);
-
- dt->limit = svm->vmcb->save.idtr.limit;
- dt->base = svm->vmcb->save.idtr.base;
-}
-
-static void svm_set_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
-{
- struct vcpu_svm *svm = to_svm(vcpu);
-
- svm->vmcb->save.idtr.limit = dt->limit;
- svm->vmcb->save.idtr.base = dt->base ;
-}
-
-static void svm_get_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
-{
- struct vcpu_svm *svm = to_svm(vcpu);
-
- dt->limit = svm->vmcb->save.gdtr.limit;
- dt->base = svm->vmcb->save.gdtr.base;
-}
-
-static void svm_set_gdt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
-{
- struct vcpu_svm *svm = to_svm(vcpu);
-
- svm->vmcb->save.gdtr.limit = dt->limit;
- svm->vmcb->save.gdtr.base = dt->base ;
-}
-
-static void svm_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
-{
-}
-
-static void svm_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
-{
- struct vcpu_svm *svm = to_svm(vcpu);
-
-#ifdef CONFIG_X86_64
- if (vcpu->arch.shadow_efer & EFER_LME) {
- if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
- vcpu->arch.shadow_efer |= EFER_LMA;
- svm->vmcb->save.efer |= EFER_LMA | EFER_LME;
- }
-
- if (is_paging(vcpu) && !(cr0 & X86_CR0_PG)) {
- vcpu->arch.shadow_efer &= ~EFER_LMA;
- svm->vmcb->save.efer &= ~(EFER_LMA | EFER_LME);
- }
- }
-#endif
- if ((vcpu->arch.cr0 & X86_CR0_TS) && !(cr0 & X86_CR0_TS)) {
- svm->vmcb->control.intercept_exceptions &= ~(1 << NM_VECTOR);
- vcpu->fpu_active = 1;
- }
-
- vcpu->arch.cr0 = cr0;
- cr0 |= X86_CR0_PG | X86_CR0_WP;
- cr0 &= ~(X86_CR0_CD | X86_CR0_NW);
- svm->vmcb->save.cr0 = cr0;
-}
-
-static void svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
-{
- vcpu->arch.cr4 = cr4;
- to_svm(vcpu)->vmcb->save.cr4 = cr4 | X86_CR4_PAE;
-}
-
-static void svm_set_segment(struct kvm_vcpu *vcpu,
- struct kvm_segment *var, int seg)
-{
- struct vcpu_svm *svm = to_svm(vcpu);
- struct vmcb_seg *s = svm_seg(vcpu, seg);
-
- s->base = var->base;
- s->limit = var->limit;
- s->selector = var->selector;
- if (var->unusable)
- s->attrib = 0;
- else {
- s->attrib = (var->type & SVM_SELECTOR_TYPE_MASK);
- s->attrib |= (var->s & 1) << SVM_SELECTOR_S_SHIFT;
- s->attrib |= (var->dpl & 3) << SVM_SELECTOR_DPL_SHIFT;
- s->attrib |= (var->present & 1) << SVM_SELECTOR_P_SHIFT;
- s->attrib |= (var->avl & 1) << SVM_SELECTOR_AVL_SHIFT;
- s->attrib |= (var->l & 1) << SVM_SELECTOR_L_SHIFT;
- s->attrib |= (var->db & 1) << SVM_SELECTOR_DB_SHIFT;
- s->attrib |= (var->g & 1) << SVM_SELECTOR_G_SHIFT;
- }
- if (seg == VCPU_SREG_CS)
- svm->vmcb->save.cpl
- = (svm->vmcb->save.cs.attrib
- >> SVM_SELECTOR_DPL_SHIFT) & 3;
-
-}
-
-/* FIXME:
-
- svm(vcpu)->vmcb->control.int_ctl &= ~V_TPR_MASK;
- svm(vcpu)->vmcb->control.int_ctl |= (sregs->cr8 & V_TPR_MASK);
-
-*/
-
-static int svm_guest_debug(struct kvm_vcpu *vcpu, struct kvm_debug_guest *dbg)
-{
- return -EOPNOTSUPP;
-}
-
-static int svm_get_irq(struct kvm_vcpu *vcpu)
-{
- struct vcpu_svm *svm = to_svm(vcpu);
- u32 exit_int_info = svm->vmcb->control.exit_int_info;
-
- if (is_external_interrupt(exit_int_info))
- return exit_int_info & SVM_EVTINJ_VEC_MASK;
- return -1;
-}
-
-static void load_host_msrs(struct kvm_vcpu *vcpu)
-{
-#ifdef CONFIG_X86_64
- wrmsrl(MSR_GS_BASE, to_svm(vcpu)->host_gs_base);
-#endif
-}
-
-static void save_host_msrs(struct kvm_vcpu *vcpu)
-{
-#ifdef CONFIG_X86_64
- rdmsrl(MSR_GS_BASE, to_svm(vcpu)->host_gs_base);
-#endif
-}
-
-static void new_asid(struct vcpu_svm *svm, struct svm_cpu_data *svm_data)
-{
- if (svm_data->next_asid > svm_data->max_asid) {
- ++svm_data->asid_generation;
- svm_data->next_asid = 1;
- svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID;
- }
-
- svm->vcpu.cpu = svm_data->cpu;
- svm->asid_generation = svm_data->asid_generation;
- svm->vmcb->control.asid = svm_data->next_asid++;
-}
-
-static unsigned long svm_get_dr(struct kvm_vcpu *vcpu, int dr)
-{
- return to_svm(vcpu)->db_regs[dr];
-}
-
-static void svm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long value,
- int *exception)
-{
- struct vcpu_svm *svm = to_svm(vcpu);
-
- *exception = 0;
-
- if (svm->vmcb->save.dr7 & DR7_GD_MASK) {
- svm->vmcb->save.dr7 &= ~DR7_GD_MASK;
- svm->vmcb->save.dr6 |= DR6_BD_MASK;
- *exception = DB_VECTOR;
- return;
- }
-
- switch (dr) {
- case 0 ... 3:
- svm->db_regs[dr] = value;
- return;
- case 4 ... 5:
- if (vcpu->arch.cr4 & X86_CR4_DE) {
- *exception = UD_VECTOR;
- return;
- }
- case 7: {
- if (value & ~((1ULL << 32) - 1)) {
- *exception = GP_VECTOR;
- return;
- }
- svm->vmcb->save.dr7 = value;
- return;
- }
- default:
- printk(KERN_DEBUG "%s: unexpected dr %u\n",
- __FUNCTION__, dr);
- *exception = UD_VECTOR;
- return;
- }
-}
-
-static int pf_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
-{
- u32 exit_int_info = svm->vmcb->control.exit_int_info;
- struct kvm *kvm = svm->vcpu.kvm;
- u64 fault_address;
- u32 error_code;
-
- if (!irqchip_in_kernel(kvm) &&
- is_external_interrupt(exit_int_info))
- push_irq(&svm->vcpu, exit_int_info & SVM_EVTINJ_VEC_MASK);
-
- fault_address = svm->vmcb->control.exit_info_2;
- error_code = svm->vmcb->control.exit_info_1;
- return kvm_mmu_page_fault(&svm->vcpu, fault_address, error_code);
-}
-
-static int ud_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
-{
- int er;
-
- er = emulate_instruction(&svm->vcpu, kvm_run, 0, 0, 0);
- if (er != EMULATE_DONE)
- kvm_queue_exception(&svm->vcpu, UD_VECTOR);
- return 1;
-}
-
-static int nm_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
-{
- svm->vmcb->control.intercept_exceptions &= ~(1 << NM_VECTOR);
- if (!(svm->vcpu.arch.cr0 & X86_CR0_TS))
- svm->vmcb->save.cr0 &= ~X86_CR0_TS;
- svm->vcpu.fpu_active = 1;
-
- return 1;
-}
-
-static int shutdown_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
-{
- /*
- * VMCB is undefined after a SHUTDOWN intercept
- * so reinitialize it.
- */
- clear_page(svm->vmcb);
- init_vmcb(svm->vmcb);
-
- kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
- return 0;
-}
-
-static int io_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
-{
- u32 io_info = svm->vmcb->control.exit_info_1; /* address size bug? */
- int size, down, in, string, rep;
- unsigned port;
-
- ++svm->vcpu.stat.io_exits;
-
- svm->next_rip = svm->vmcb->control.exit_info_2;
-
- string = (io_info & SVM_IOIO_STR_MASK) != 0;
-
- if (string) {
- if (emulate_instruction(&svm->vcpu,
- kvm_run, 0, 0, 0) == EMULATE_DO_MMIO)
- return 0;
- return 1;
- }
-
- in = (io_info & SVM_IOIO_TYPE_MASK) != 0;
- port = io_info >> 16;
- size = (io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT;
- rep = (io_info & SVM_IOIO_REP_MASK) != 0;
- down = (svm->vmcb->save.rflags & X86_EFLAGS_DF) != 0;
-
- return kvm_emulate_pio(&svm->vcpu, kvm_run, in, size, port);
-}
-
-static int nop_on_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
-{
- return 1;
-}
-
-static int halt_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
-{
- svm->next_rip = svm->vmcb->save.rip + 1;
- skip_emulated_instruction(&svm->vcpu);
- return kvm_emulate_halt(&svm->vcpu);
-}
-
-static int vmmcall_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
-{
- svm->next_rip = svm->vmcb->save.rip + 3;
- skip_emulated_instruction(&svm->vcpu);
- kvm_emulate_hypercall(&svm->vcpu);
- return 1;
-}
-
-static int invalid_op_interception(struct vcpu_svm *svm,
- struct kvm_run *kvm_run)
-{
- kvm_queue_exception(&svm->vcpu, UD_VECTOR);
- return 1;
-}
-
-static int task_switch_interception(struct vcpu_svm *svm,
- struct kvm_run *kvm_run)
-{
- pr_unimpl(&svm->vcpu, "%s: task switch is unsupported\n", __FUNCTION__);
- kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
- return 0;
-}
-
-static int cpuid_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
-{
- svm->next_rip = svm->vmcb->save.rip + 2;
- kvm_emulate_cpuid(&svm->vcpu);
- return 1;
-}
-
-static int emulate_on_interception(struct vcpu_svm *svm,
- struct kvm_run *kvm_run)
-{
- if (emulate_instruction(&svm->vcpu, NULL, 0, 0, 0) != EMULATE_DONE)
- pr_unimpl(&svm->vcpu, "%s: failed\n", __FUNCTION__);
- return 1;
-}
-
-static int cr8_write_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
-{
- emulate_instruction(&svm->vcpu, NULL, 0, 0, 0);
- if (irqchip_in_kernel(svm->vcpu.kvm))
- return 1;
- kvm_run->exit_reason = KVM_EXIT_SET_TPR;
- return 0;
-}
-
-static int svm_get_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 *data)
-{
- struct vcpu_svm *svm = to_svm(vcpu);
-
- switch (ecx) {
- case MSR_IA32_TIME_STAMP_COUNTER: {
- u64 tsc;
-
- rdtscll(tsc);
- *data = svm->vmcb->control.tsc_offset + tsc;
- break;
- }
- case MSR_K6_STAR:
- *data = svm->vmcb->save.star;
- break;
-#ifdef CONFIG_X86_64
- case MSR_LSTAR:
- *data = svm->vmcb->save.lstar;
- break;
- case MSR_CSTAR:
- *data = svm->vmcb->save.cstar;
- break;
- case MSR_KERNEL_GS_BASE:
- *data = svm->vmcb->save.kernel_gs_base;
- break;
- case MSR_SYSCALL_MASK:
- *data = svm->vmcb->save.sfmask;
- break;
-#endif
- case MSR_IA32_SYSENTER_CS:
- *data = svm->vmcb->save.sysenter_cs;
- break;
- case MSR_IA32_SYSENTER_EIP:
- *data = svm->vmcb->save.sysenter_eip;
- break;
- case MSR_IA32_SYSENTER_ESP:
- *data = svm->vmcb->save.sysenter_esp;
- break;
- default:
- return kvm_get_msr_common(vcpu, ecx, data);
- }
- return 0;
-}
-
-static int rdmsr_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
-{
- u32 ecx = svm->vcpu.arch.regs[VCPU_REGS_RCX];
- u64 data;
-
- if (svm_get_msr(&svm->vcpu, ecx, &data))
- kvm_inject_gp(&svm->vcpu, 0);
- else {
- svm->vmcb->save.rax = data & 0xffffffff;
- svm->vcpu.arch.regs[VCPU_REGS_RDX] = data >> 32;
- svm->next_rip = svm->vmcb->save.rip + 2;
- skip_emulated_instruction(&svm->vcpu);
- }
- return 1;
-}
-
-static int svm_set_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 data)
-{
- struct vcpu_svm *svm = to_svm(vcpu);
-
- switch (ecx) {
- case MSR_IA32_TIME_STAMP_COUNTER: {
- u64 tsc;
-
- rdtscll(tsc);
- svm->vmcb->control.tsc_offset = data - tsc;
- break;
- }
- case MSR_K6_STAR:
- svm->vmcb->save.star = data;
- break;
-#ifdef CONFIG_X86_64
- case MSR_LSTAR:
- svm->vmcb->save.lstar = data;
- break;
- case MSR_CSTAR:
- svm->vmcb->save.cstar = data;
- break;
- case MSR_KERNEL_GS_BASE:
- svm->vmcb->save.kernel_gs_base = data;
- break;
- case MSR_SYSCALL_MASK:
- svm->vmcb->save.sfmask = data;
- break;
-#endif
- case MSR_IA32_SYSENTER_CS:
- svm->vmcb->save.sysenter_cs = data;
- break;
- case MSR_IA32_SYSENTER_EIP:
- svm->vmcb->save.sysenter_eip = data;
- break;
- case MSR_IA32_SYSENTER_ESP:
- svm->vmcb->save.sysenter_esp = data;
- break;
- case MSR_K7_EVNTSEL0:
- case MSR_K7_EVNTSEL1:
- case MSR_K7_EVNTSEL2:
- case MSR_K7_EVNTSEL3:
- /*
- * only support writing 0 to the performance counters for now
- * to make Windows happy. Should be replaced by a real
- * performance counter emulation later.
- */
- if (data != 0)
- goto unhandled;
- break;
- default:
- unhandled:
- return kvm_set_msr_common(vcpu, ecx, data);
- }
- return 0;
-}
-
-static int wrmsr_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
-{
- u32 ecx = svm->vcpu.arch.regs[VCPU_REGS_RCX];
- u64 data = (svm->vmcb->save.rax & -1u)
- | ((u64)(svm->vcpu.arch.regs[VCPU_REGS_RDX] & -1u) << 32);
- svm->next_rip = svm->vmcb->save.rip + 2;
- if (svm_set_msr(&svm->vcpu, ecx, data))
- kvm_inject_gp(&svm->vcpu, 0);
- else
- skip_emulated_instruction(&svm->vcpu);
- return 1;
-}
-
-static int msr_interception(struct vcpu_svm *svm, struct kvm_run *kvm_run)
-{
- if (svm->vmcb->control.exit_info_1)
- return wrmsr_interception(svm, kvm_run);
- else
- return rdmsr_interception(svm, kvm_run);
-}
-
-static int interrupt_window_interception(struct vcpu_svm *svm,
- struct kvm_run *kvm_run)
-{
- svm->vmcb->control.intercept &= ~(1ULL << INTERCEPT_VINTR);
- svm->vmcb->control.int_ctl &= ~V_IRQ_MASK;
- /*
- * If the user space waits to inject interrupts, exit as soon as
- * possible
- */
- if (kvm_run->request_interrupt_window &&
- !svm->vcpu.arch.irq_summary) {
- ++svm->vcpu.stat.irq_window_exits;
- kvm_run->exit_reason = KVM_EXIT_IRQ_WINDOW_OPEN;
- return 0;
- }
-
- return 1;
-}
-
-static int (*svm_exit_handlers[])(struct vcpu_svm *svm,
- struct kvm_run *kvm_run) = {
- [SVM_EXIT_READ_CR0] = emulate_on_interception,
- [SVM_EXIT_READ_CR3] = emulate_on_interception,
- [SVM_EXIT_READ_CR4] = emulate_on_interception,
- [SVM_EXIT_READ_CR8] = emulate_on_interception,
- /* for now: */
- [SVM_EXIT_WRITE_CR0] = emulate_on_interception,
- [SVM_EXIT_WRITE_CR3] = emulate_on_interception,
- [SVM_EXIT_WRITE_CR4] = emulate_on_interception,
- [SVM_EXIT_WRITE_CR8] = cr8_write_interception,
- [SVM_EXIT_READ_DR0] = emulate_on_interception,
- [SVM_EXIT_READ_DR1] = emulate_on_interception,
- [SVM_EXIT_READ_DR2] = emulate_on_interception,
- [SVM_EXIT_READ_DR3] = emulate_on_interception,
- [SVM_EXIT_WRITE_DR0] = emulate_on_interception,
- [SVM_EXIT_WRITE_DR1] = emulate_on_interception,
- [SVM_EXIT_WRITE_DR2] = emulate_on_interception,
- [SVM_EXIT_WRITE_DR3] = emulate_on_interception,
- [SVM_EXIT_WRITE_DR5] = emulate_on_interception,
- [SVM_EXIT_WRITE_DR7] = emulate_on_interception,
- [SVM_EXIT_EXCP_BASE + UD_VECTOR] = ud_interception,
- [SVM_EXIT_EXCP_BASE + PF_VECTOR] = pf_interception,
- [SVM_EXIT_EXCP_BASE + NM_VECTOR] = nm_interception,
- [SVM_EXIT_INTR] = nop_on_interception,
- [SVM_EXIT_NMI] = nop_on_interception,
- [SVM_EXIT_SMI] = nop_on_interception,
- [SVM_EXIT_INIT] = nop_on_interception,
- [SVM_EXIT_VINTR] = interrupt_window_interception,
- /* [SVM_EXIT_CR0_SEL_WRITE] = emulate_on_interception, */
- [SVM_EXIT_CPUID] = cpuid_interception,
- [SVM_EXIT_INVD] = emulate_on_interception,
- [SVM_EXIT_HLT] = halt_interception,
- [SVM_EXIT_INVLPG] = emulate_on_interception,
- [SVM_EXIT_INVLPGA] = invalid_op_interception,
- [SVM_EXIT_IOIO] = io_interception,
- [SVM_EXIT_MSR] = msr_interception,
- [SVM_EXIT_TASK_SWITCH] = task_switch_interception,
- [SVM_EXIT_SHUTDOWN] = shutdown_interception,
- [SVM_EXIT_VMRUN] = invalid_op_interception,
- [SVM_EXIT_VMMCALL] = vmmcall_interception,
- [SVM_EXIT_VMLOAD] = invalid_op_interception,
- [SVM_EXIT_VMSAVE] = invalid_op_interception,
- [SVM_EXIT_STGI] = invalid_op_interception,
- [SVM_EXIT_CLGI] = invalid_op_interception,
- [SVM_EXIT_SKINIT] = invalid_op_interception,
- [SVM_EXIT_WBINVD] = emulate_on_interception,
- [SVM_EXIT_MONITOR] = invalid_op_interception,
- [SVM_EXIT_MWAIT] = invalid_op_interception,
-};
-
-
-static int handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
-{
- struct vcpu_svm *svm = to_svm(vcpu);
- u32 exit_code = svm->vmcb->control.exit_code;
-
- kvm_reput_irq(svm);
-
- if (svm->vmcb->control.exit_code == SVM_EXIT_ERR) {
- kvm_run->exit_reason = KVM_EXIT_FAIL_ENTRY;
- kvm_run->fail_entry.hardware_entry_failure_reason
- = svm->vmcb->control.exit_code;
- return 0;
- }
-
- if (is_external_interrupt(svm->vmcb->control.exit_int_info) &&
- exit_code != SVM_EXIT_EXCP_BASE + PF_VECTOR)
- printk(KERN_ERR "%s: unexpected exit_ini_info 0x%x "
- "exit_code 0x%x\n",
- __FUNCTION__, svm->vmcb->control.exit_int_info,
- exit_code);
-
- if (exit_code >= ARRAY_SIZE(svm_exit_handlers)
- || !svm_exit_handlers[exit_code]) {
- kvm_run->exit_reason = KVM_EXIT_UNKNOWN;
- kvm_run->hw.hardware_exit_reason = exit_code;
- return 0;
- }
-
- return svm_exit_handlers[exit_code](svm, kvm_run);
-}
-
-static void reload_tss(struct kvm_vcpu *vcpu)
-{
- int cpu = raw_smp_processor_id();
-
- struct svm_cpu_data *svm_data = per_cpu(svm_data, cpu);
- svm_data->tss_desc->type = 9; /* available 32/64-bit TSS */
- load_TR_desc();
-}
-
-static void pre_svm_run(struct vcpu_svm *svm)
-{
- int cpu = raw_smp_processor_id();
-
- struct svm_cpu_data *svm_data = per_cpu(svm_data, cpu);
-
- svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;
- if (svm->vcpu.cpu != cpu ||
- svm->asid_generation != svm_data->asid_generation)
- new_asid(svm, svm_data);
-}
-
-
-static inline void svm_inject_irq(struct vcpu_svm *svm, int irq)
-{
- struct vmcb_control_area *control;
-
- control = &svm->vmcb->control;
- control->int_vector = irq;
- control->int_ctl &= ~V_INTR_PRIO_MASK;
- control->int_ctl |= V_IRQ_MASK |
- ((/*control->int_vector >> 4*/ 0xf) << V_INTR_PRIO_SHIFT);
-}
-
-static void svm_set_irq(struct kvm_vcpu *vcpu, int irq)
-{
- struct vcpu_svm *svm = to_svm(vcpu);
-
- svm_inject_irq(svm, irq);
-}
-
-static void svm_intr_assist(struct kvm_vcpu *vcpu)
-{
- struct vcpu_svm *svm = to_svm(vcpu);
- struct vmcb *vmcb = svm->vmcb;
- int intr_vector = -1;
-
- if ((vmcb->control.exit_int_info & SVM_EVTINJ_VALID) &&
- ((vmcb->control.exit_int_info & SVM_EVTINJ_TYPE_MASK) == 0)) {
- intr_vector = vmcb->control.exit_int_info &
- SVM_EVTINJ_VEC_MASK;
- vmcb->control.exit_int_info = 0;
- svm_inject_irq(svm, intr_vector);
- return;
- }
-
- if (vmcb->control.int_ctl & V_IRQ_MASK)
- return;
-
- if (!kvm_cpu_has_interrupt(vcpu))
- return;
-
- if (!(vmcb->save.rflags & X86_EFLAGS_IF) ||
- (vmcb->control.int_state & SVM_INTERRUPT_SHADOW_MASK) ||
- (vmcb->control.event_inj & SVM_EVTINJ_VALID)) {
- /* unable to deliver irq, set pending irq */
- vmcb->control.intercept |= (1ULL << INTERCEPT_VINTR);
- svm_inject_irq(svm, 0x0);
- return;
- }
- /* Okay, we can deliver the interrupt: grab it and update PIC state. */
- intr_vector = kvm_cpu_get_interrupt(vcpu);
- svm_inject_irq(svm, intr_vector);
- kvm_timer_intr_post(vcpu, intr_vector);
-}
-
-static void kvm_reput_irq(struct vcpu_svm *svm)
-{
- struct vmcb_control_area *control = &svm->vmcb->control;
-
- if ((control->int_ctl & V_IRQ_MASK)
- && !irqchip_in_kernel(svm->vcpu.kvm)) {
- control->int_ctl &= ~V_IRQ_MASK;
- push_irq(&svm->vcpu, control->int_vector);
- }
-
- svm->vcpu.arch.interrupt_window_open =
- !(control->int_state & SVM_INTERRUPT_SHADOW_MASK);
-}
-
-static void svm_do_inject_vector(struct vcpu_svm *svm)
-{
- struct kvm_vcpu *vcpu = &svm->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);
- svm_inject_irq(svm, irq);
-}
-
-static void do_interrupt_requests(struct kvm_vcpu *vcpu,
- struct kvm_run *kvm_run)
-{
- struct vcpu_svm *svm = to_svm(vcpu);
- struct vmcb_control_area *control = &svm->vmcb->control;
-
- svm->vcpu.arch.interrupt_window_open =
- (!(control->int_state & SVM_INTERRUPT_SHADOW_MASK) &&
- (svm->vmcb->save.rflags & X86_EFLAGS_IF));
-
- if (svm->vcpu.arch.interrupt_window_open && svm->vcpu.arch.irq_summary)
- /*
- * If interrupts enabled, and not blocked by sti or mov ss. Good.
- */
- svm_do_inject_vector(svm);
-
- /*
- * Interrupts blocked. Wait for unblock.
- */
- if (!svm->vcpu.arch.interrupt_window_open &&
- (svm->vcpu.arch.irq_summary || kvm_run->request_interrupt_window))
- control->intercept |= 1ULL << INTERCEPT_VINTR;
- else
- control->intercept &= ~(1ULL << INTERCEPT_VINTR);
-}
-
-static int svm_set_tss_addr(struct kvm *kvm, unsigned int addr)
-{
- return 0;
-}
-
-static void save_db_regs(unsigned long *db_regs)
-{
- asm volatile ("mov %%dr0, %0" : "=r"(db_regs[0]));
- asm volatile ("mov %%dr1, %0" : "=r"(db_regs[1]));
- asm volatile ("mov %%dr2, %0" : "=r"(db_regs[2]));
- asm volatile ("mov %%dr3, %0" : "=r"(db_regs[3]));
-}
-
-static void load_db_regs(unsigned long *db_regs)
-{
- asm volatile ("mov %0, %%dr0" : : "r"(db_regs[0]));
- asm volatile ("mov %0, %%dr1" : : "r"(db_regs[1]));
- asm volatile ("mov %0, %%dr2" : : "r"(db_regs[2]));
- asm volatile ("mov %0, %%dr3" : : "r"(db_regs[3]));
-}
-
-static void svm_flush_tlb(struct kvm_vcpu *vcpu)
-{
- force_new_asid(vcpu);
-}
-
-static void svm_prepare_guest_switch(struct kvm_vcpu *vcpu)
-{
-}
-
-static void svm_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
-{
- struct vcpu_svm *svm = to_svm(vcpu);
- u16 fs_selector;
- u16 gs_selector;
- u16 ldt_selector;
-
- pre_svm_run(svm);
-
- save_host_msrs(vcpu);
- fs_selector = read_fs();
- gs_selector = read_gs();
- ldt_selector = read_ldt();
- svm->host_cr2 = kvm_read_cr2();
- svm->host_dr6 = read_dr6();
- svm->host_dr7 = read_dr7();
- svm->vmcb->save.cr2 = vcpu->arch.cr2;
-
- if (svm->vmcb->save.dr7 & 0xff) {
- write_dr7(0);
- save_db_regs(svm->host_db_regs);
- load_db_regs(svm->db_regs);
- }
-
- clgi();
-
- local_irq_enable();
-
- asm volatile (
-#ifdef CONFIG_X86_64
- "push %%rbp; \n\t"
-#else
- "push %%ebp; \n\t"
-#endif
-
-#ifdef CONFIG_X86_64
- "mov %c[rbx](%[svm]), %%rbx \n\t"
- "mov %c[rcx](%[svm]), %%rcx \n\t"
- "mov %c[rdx](%[svm]), %%rdx \n\t"
- "mov %c[rsi](%[svm]), %%rsi \n\t"
- "mov %c[rdi](%[svm]), %%rdi \n\t"
- "mov %c[rbp](%[svm]), %%rbp \n\t"
- "mov %c[r8](%[svm]), %%r8 \n\t"
- "mov %c[r9](%[svm]), %%r9 \n\t"
- "mov %c[r10](%[svm]), %%r10 \n\t"
- "mov %c[r11](%[svm]), %%r11 \n\t"
- "mov %c[r12](%[svm]), %%r12 \n\t"
- "mov %c[r13](%[svm]), %%r13 \n\t"
- "mov %c[r14](%[svm]), %%r14 \n\t"
- "mov %c[r15](%[svm]), %%r15 \n\t"
-#else
- "mov %c[rbx](%[svm]), %%ebx \n\t"
- "mov %c[rcx](%[svm]), %%ecx \n\t"
- "mov %c[rdx](%[svm]), %%edx \n\t"
- "mov %c[rsi](%[svm]), %%esi \n\t"
- "mov %c[rdi](%[svm]), %%edi \n\t"
- "mov %c[rbp](%[svm]), %%ebp \n\t"
-#endif
-
-#ifdef CONFIG_X86_64
- /* Enter guest mode */
- "push %%rax \n\t"
- "mov %c[vmcb](%[svm]), %%rax \n\t"
- SVM_VMLOAD "\n\t"
- SVM_VMRUN "\n\t"
- SVM_VMSAVE "\n\t"
- "pop %%rax \n\t"
-#else
- /* Enter guest mode */
- "push %%eax \n\t"
- "mov %c[vmcb](%[svm]), %%eax \n\t"
- SVM_VMLOAD "\n\t"
- SVM_VMRUN "\n\t"
- SVM_VMSAVE "\n\t"
- "pop %%eax \n\t"
-#endif
-
- /* Save guest registers, load host registers */
-#ifdef CONFIG_X86_64
- "mov %%rbx, %c[rbx](%[svm]) \n\t"
- "mov %%rcx, %c[rcx](%[svm]) \n\t"
- "mov %%rdx, %c[rdx](%[svm]) \n\t"
- "mov %%rsi, %c[rsi](%[svm]) \n\t"
- "mov %%rdi, %c[rdi](%[svm]) \n\t"
- "mov %%rbp, %c[rbp](%[svm]) \n\t"
- "mov %%r8, %c[r8](%[svm]) \n\t"
- "mov %%r9, %c[r9](%[svm]) \n\t"
- "mov %%r10, %c[r10](%[svm]) \n\t"
- "mov %%r11, %c[r11](%[svm]) \n\t"
- "mov %%r12, %c[r12](%[svm]) \n\t"
- "mov %%r13, %c[r13](%[svm]) \n\t"
- "mov %%r14, %c[r14](%[svm]) \n\t"
- "mov %%r15, %c[r15](%[svm]) \n\t"
-
- "pop %%rbp; \n\t"
-#else
- "mov %%ebx, %c[rbx](%[svm]) \n\t"
- "mov %%ecx, %c[rcx](%[svm]) \n\t"
- "mov %%edx, %c[rdx](%[svm]) \n\t"
- "mov %%esi, %c[rsi](%[svm]) \n\t"
- "mov %%edi, %c[rdi](%[svm]) \n\t"
- "mov %%ebp, %c[rbp](%[svm]) \n\t"
-
- "pop %%ebp; \n\t"
-#endif
- :
- : [svm]"a"(svm),
- [vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)),
- [rbx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBX])),
- [rcx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RCX])),
- [rdx]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDX])),
- [rsi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RSI])),
- [rdi]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RDI])),
- [rbp]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_RBP]))
-#ifdef CONFIG_X86_64
- , [r8]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R8])),
- [r9]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R9])),
- [r10]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R10])),
- [r11]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R11])),
- [r12]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R12])),
- [r13]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R13])),
- [r14]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R14])),
- [r15]"i"(offsetof(struct vcpu_svm, vcpu.arch.regs[VCPU_REGS_R15]))
-#endif
- : "cc", "memory"
-#ifdef CONFIG_X86_64
- , "rbx", "rcx", "rdx", "rsi", "rdi"
- , "r8", "r9", "r10", "r11" , "r12", "r13", "r14", "r15"
-#else
- , "ebx", "ecx", "edx" , "esi", "edi"
-#endif
- );
-
- if ((svm->vmcb->save.dr7 & 0xff))
- load_db_regs(svm->host_db_regs);
-
- vcpu->arch.cr2 = svm->vmcb->save.cr2;
-
- write_dr6(svm->host_dr6);
- write_dr7(svm->host_dr7);
- kvm_write_cr2(svm->host_cr2);
-
- load_fs(fs_selector);
- load_gs(gs_selector);
- load_ldt(ldt_selector);
- load_host_msrs(vcpu);
-
- reload_tss(vcpu);
-
- local_irq_disable();
-
- stgi();
-
- svm->next_rip = 0;
-}
-
-static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root)
-{
- struct vcpu_svm *svm = to_svm(vcpu);
-
- svm->vmcb->save.cr3 = root;
- force_new_asid(vcpu);
-
- if (vcpu->fpu_active) {
- svm->vmcb->control.intercept_exceptions |= (1 << NM_VECTOR);
- svm->vmcb->save.cr0 |= X86_CR0_TS;
- vcpu->fpu_active = 0;
- }
-}
-
-static int is_disabled(void)
-{
- u64 vm_cr;
-
- rdmsrl(MSR_VM_CR, vm_cr);
- if (vm_cr & (1 << SVM_VM_CR_SVM_DISABLE))
- return 1;
-
- return 0;
-}
-
-static void
-svm_patch_hypercall(struct kvm_vcpu *vcpu, unsigned char *hypercall)
-{
- /*
- * Patch in the VMMCALL instruction:
- */
- hypercall[0] = 0x0f;
- hypercall[1] = 0x01;
- hypercall[2] = 0xd9;
-}
-
-static void svm_check_processor_compat(void *rtn)
-{
- *(int *)rtn = 0;
-}
-
-static struct kvm_x86_ops svm_x86_ops = {
- .cpu_has_kvm_support = has_svm,
- .disabled_by_bios = is_disabled,
- .hardware_setup = svm_hardware_setup,
- .hardware_unsetup = svm_hardware_unsetup,
- .check_processor_compatibility = svm_check_processor_compat,
- .hardware_enable = svm_hardware_enable,
- .hardware_disable = svm_hardware_disable,
-
- .vcpu_create = svm_create_vcpu,
- .vcpu_free = svm_free_vcpu,
- .vcpu_reset = svm_vcpu_reset,
-
- .prepare_guest_switch = svm_prepare_guest_switch,
- .vcpu_load = svm_vcpu_load,
- .vcpu_put = svm_vcpu_put,
- .vcpu_decache = svm_vcpu_decache,
-
- .set_guest_debug = svm_guest_debug,
- .get_msr = svm_get_msr,
- .set_msr = svm_set_msr,
- .get_segment_base = svm_get_segment_base,
- .get_segment = svm_get_segment,
- .set_segment = svm_set_segment,
- .get_cs_db_l_bits = kvm_get_cs_db_l_bits,
- .decache_cr4_guest_bits = svm_decache_cr4_guest_bits,
- .set_cr0 = svm_set_cr0,
- .set_cr3 = svm_set_cr3,
- .set_cr4 = svm_set_cr4,
- .set_efer = svm_set_efer,
- .get_idt = svm_get_idt,
- .set_idt = svm_set_idt,
- .get_gdt = svm_get_gdt,
- .set_gdt = svm_set_gdt,
- .get_dr = svm_get_dr,
- .set_dr = svm_set_dr,
- .cache_regs = svm_cache_regs,
- .decache_regs = svm_decache_regs,
- .get_rflags = svm_get_rflags,
- .set_rflags = svm_set_rflags,
-
- .tlb_flush = svm_flush_tlb,
-
- .run = svm_vcpu_run,
- .handle_exit = handle_exit,
- .skip_emulated_instruction = skip_emulated_instruction,
- .patch_hypercall = svm_patch_hypercall,
- .get_irq = svm_get_irq,
- .set_irq = svm_set_irq,
- .queue_exception = svm_queue_exception,
- .exception_injected = svm_exception_injected,
- .inject_pending_irq = svm_intr_assist,
- .inject_pending_vectors = do_interrupt_requests,
-
- .set_tss_addr = svm_set_tss_addr,
-};
-
-static int __init svm_init(void)
-{
- return kvm_init(&svm_x86_ops, sizeof(struct vcpu_svm),
- THIS_MODULE);
-}
-
-static void __exit svm_exit(void)
-{
- kvm_exit();
-}
-
-module_init(svm_init)
-module_exit(svm_exit)
projects / linux-2.6-omap-h63xx.git / blobdiff