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KVM: Remove arch specific components from the general code

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struct kvm_vcpu has vmx-specific members; remove them to a private structure.

Signed-off-by: Gregory Haskins <ghaskins@novell.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Avi Kivity <avi@qumranet.com>
This commit is contained in:
Gregory Haskins 2007-07-27 08:13:10 -04:00 committed by Avi Kivity
parent c820c2aa27
commit a2fa3e9f52
5 changed files with 397 additions and 306 deletions
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31
drivers/kvm/kvm.h
View File

@ -15,7 +15,6 @@
#include <linux/mm.h>
#include <asm/signal.h>
#include "vmx.h"
#include <linux/kvm.h>
#include <linux/kvm_para.h>
@ -140,14 +139,6 @@ struct kvm_mmu_page {
};
};
struct vmcs {
u32 revision_id;
u32 abort;
char data[0];
};
#define vmx_msr_entry kvm_msr_entry
struct kvm_vcpu;
/*
@ -309,15 +300,12 @@ void kvm_io_bus_register_dev(struct kvm_io_bus *bus,
struct kvm_io_device *dev);
struct kvm_vcpu {
int valid;
struct kvm *kvm;
int vcpu_id;
union {
struct vmcs *vmcs;
struct vcpu_svm *svm;
};
void *_priv;
struct mutex mutex;
int cpu;
int launched;
u64 host_tsc;
struct kvm_run *run;
int interrupt_window_open;
@ -340,14 +328,6 @@ struct kvm_vcpu {
u64 shadow_efer;
u64 apic_base;
u64 ia32_misc_enable_msr;
int nmsrs;
int save_nmsrs;
int msr_offset_efer;
#ifdef CONFIG_X86_64
int msr_offset_kernel_gs_base;
#endif
struct vmx_msr_entry *guest_msrs;
struct vmx_msr_entry *host_msrs;
struct kvm_mmu mmu;
@ -366,11 +346,6 @@ struct kvm_vcpu {
char *guest_fx_image;
int fpu_active;
int guest_fpu_loaded;
struct vmx_host_state {
int loaded;
u16 fs_sel, gs_sel, ldt_sel;
int fs_gs_ldt_reload_needed;
} vmx_host_state;
int mmio_needed;
int mmio_read_completed;
@ -579,8 +554,6 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, u32 msr, u64 data);
void fx_init(struct kvm_vcpu *vcpu);
void load_msrs(struct vmx_msr_entry *e, int n);
void save_msrs(struct vmx_msr_entry *e, int n);
void kvm_resched(struct kvm_vcpu *vcpu);
void kvm_load_guest_fpu(struct kvm_vcpu *vcpu);
void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);

26
drivers/kvm/kvm_main.c
View File

@ -367,7 +367,7 @@ static void free_pio_guest_pages(struct kvm_vcpu *vcpu)
static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
{
if (!vcpu->vmcs)
if (!vcpu->valid)
return;
vcpu_load(vcpu);
@ -377,7 +377,7 @@ static void kvm_unload_vcpu_mmu(struct kvm_vcpu *vcpu)
static void kvm_free_vcpu(struct kvm_vcpu *vcpu)
{
if (!vcpu->vmcs)
if (!vcpu->valid)
return;
vcpu_load(vcpu);
@ -1645,24 +1645,6 @@ void kvm_resched(struct kvm_vcpu *vcpu)
}
EXPORT_SYMBOL_GPL(kvm_resched);
void load_msrs(struct vmx_msr_entry *e, int n)
{
int i;
for (i = 0; i < n; ++i)
wrmsrl(e[i].index, e[i].data);
}
EXPORT_SYMBOL_GPL(load_msrs);
void save_msrs(struct vmx_msr_entry *e, int n)
{
int i;
for (i = 0; i < n; ++i)
rdmsrl(e[i].index, e[i].data);
}
EXPORT_SYMBOL_GPL(save_msrs);
void kvm_emulate_cpuid(struct kvm_vcpu *vcpu)
{
int i;
@ -2401,7 +2383,7 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n)
mutex_lock(&vcpu->mutex);
if (vcpu->vmcs) {
if (vcpu->valid) {
mutex_unlock(&vcpu->mutex);
return -EEXIST;
}
@ -2449,6 +2431,8 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n)
kvm->nvcpus = n + 1;
spin_unlock(&kvm_lock);
vcpu->valid = 1;
return r;
out_free_vcpus:

3
drivers/kvm/kvm_svm.h
View File

@ -20,7 +20,10 @@ static const u32 host_save_user_msrs[] = {
#define NR_HOST_SAVE_USER_MSRS ARRAY_SIZE(host_save_user_msrs)
#define NUM_DB_REGS 4
struct kvm_vcpu;
struct vcpu_svm {
struct kvm_vcpu *vcpu;
struct vmcb *vmcb;
unsigned long vmcb_pa;
struct svm_cpu_data *svm_data;

394
drivers/kvm/svm.c
View File

@ -49,6 +49,11 @@ MODULE_LICENSE("GPL");
#define SVM_FEATURE_LBRV (1 << 1)
#define SVM_DEATURE_SVML (1 << 2)
static inline struct vcpu_svm *to_svm(struct kvm_vcpu *vcpu)
{
return (struct vcpu_svm*)vcpu->_priv;
}
unsigned long iopm_base;
unsigned long msrpm_base;
@ -95,7 +100,7 @@ static inline u32 svm_has(u32 feat)
static unsigned get_addr_size(struct kvm_vcpu *vcpu)
{
struct vmcb_save_area *sa = &vcpu->svm->vmcb->save;
struct vmcb_save_area *sa = &to_svm(vcpu)->vmcb->save;
u16 cs_attrib;
if (!(sa->cr0 & X86_CR0_PE) || (sa->rflags & X86_EFLAGS_VM))
@ -181,7 +186,7 @@ static inline void write_dr7(unsigned long val)
static inline void force_new_asid(struct kvm_vcpu *vcpu)
{
vcpu->svm->asid_generation--;
to_svm(vcpu)->asid_generation--;
}
static inline void flush_guest_tlb(struct kvm_vcpu *vcpu)
@ -194,22 +199,24 @@ static void svm_set_efer(struct kvm_vcpu *vcpu, u64 efer)
if (!(efer & KVM_EFER_LMA))
efer &= ~KVM_EFER_LME;
vcpu->svm->vmcb->save.efer = efer | MSR_EFER_SVME_MASK;
to_svm(vcpu)->vmcb->save.efer = efer | MSR_EFER_SVME_MASK;
vcpu->shadow_efer = efer;
}
static void svm_inject_gp(struct kvm_vcpu *vcpu, unsigned error_code)
{
vcpu->svm->vmcb->control.event_inj = SVM_EVTINJ_VALID |
struct vcpu_svm *svm = to_svm(vcpu);
svm->vmcb->control.event_inj = SVM_EVTINJ_VALID |
SVM_EVTINJ_VALID_ERR |
SVM_EVTINJ_TYPE_EXEPT |
GP_VECTOR;
vcpu->svm->vmcb->control.event_inj_err = error_code;
svm->vmcb->control.event_inj_err = error_code;
}
static void inject_ud(struct kvm_vcpu *vcpu)
{
vcpu->svm->vmcb->control.event_inj = SVM_EVTINJ_VALID |
to_svm(vcpu)->vmcb->control.event_inj = SVM_EVTINJ_VALID |
SVM_EVTINJ_TYPE_EXEPT |
UD_VECTOR;
}
@ -228,19 +235,21 @@ static int is_external_interrupt(u32 info)
static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
{
if (!vcpu->svm->next_rip) {
struct vcpu_svm *svm = to_svm(vcpu);
if (!svm->next_rip) {
printk(KERN_DEBUG "%s: NOP\n", __FUNCTION__);
return;
}
if (vcpu->svm->next_rip - vcpu->svm->vmcb->save.rip > 15) {
if (svm->next_rip - svm->vmcb->save.rip > 15) {
printk(KERN_ERR "%s: ip 0x%llx next 0x%llx\n",
__FUNCTION__,
vcpu->svm->vmcb->save.rip,
vcpu->svm->next_rip);
svm->vmcb->save.rip,
svm->next_rip);
}
vcpu->rip = vcpu->svm->vmcb->save.rip = vcpu->svm->next_rip;
vcpu->svm->vmcb->control.int_state &= ~SVM_INTERRUPT_SHADOW_MASK;
vcpu->rip = svm->vmcb->save.rip = svm->next_rip;
svm->vmcb->control.int_state &= ~SVM_INTERRUPT_SHADOW_MASK;
vcpu->interrupt_window_open = 1;
}
@ -569,23 +578,27 @@ static void init_vmcb(struct vmcb *vmcb)
static int svm_create_vcpu(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm;
struct page *page;
int r;
r = -ENOMEM;
vcpu->svm = kzalloc(sizeof *vcpu->svm, GFP_KERNEL);
if (!vcpu->svm)
svm = kzalloc(sizeof *svm, GFP_KERNEL);
if (!svm)
goto out1;
page = alloc_page(GFP_KERNEL);
if (!page)
goto out2;
vcpu->svm->vmcb = page_address(page);
clear_page(vcpu->svm->vmcb);
vcpu->svm->vmcb_pa = page_to_pfn(page) << PAGE_SHIFT;
vcpu->svm->asid_generation = 0;
memset(vcpu->svm->db_regs, 0, sizeof(vcpu->svm->db_regs));
init_vmcb(vcpu->svm->vmcb);
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);
svm->vcpu = vcpu;
vcpu->_priv = svm;
fx_init(vcpu);
vcpu->fpu_active = 1;
@ -596,22 +609,26 @@ static int svm_create_vcpu(struct kvm_vcpu *vcpu)
return 0;
out2:
kfree(vcpu->svm);
kfree(svm);
out1:
return r;
}
static void svm_free_vcpu(struct kvm_vcpu *vcpu)
{
if (!vcpu->svm)
struct vcpu_svm *svm = to_svm(vcpu);
if (!svm)
return;
if (vcpu->svm->vmcb)
__free_page(pfn_to_page(vcpu->svm->vmcb_pa >> PAGE_SHIFT));
kfree(vcpu->svm);
if (svm->vmcb)
__free_page(pfn_to_page(svm->vmcb_pa >> PAGE_SHIFT));
kfree(svm);
vcpu->_priv = NULL;
}
static void svm_vcpu_load(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm = to_svm(vcpu);
int cpu, i;
cpu = get_cpu();
@ -624,20 +641,21 @@ static void svm_vcpu_load(struct kvm_vcpu *vcpu)
*/
rdtscll(tsc_this);
delta = vcpu->host_tsc - tsc_this;
vcpu->svm->vmcb->control.tsc_offset += delta;
svm->vmcb->control.tsc_offset += delta;
vcpu->cpu = cpu;
}
for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
rdmsrl(host_save_user_msrs[i], vcpu->svm->host_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;
for (i = 0; i < NR_HOST_SAVE_USER_MSRS; i++)
wrmsrl(host_save_user_msrs[i], vcpu->svm->host_user_msrs[i]);
wrmsrl(host_save_user_msrs[i], svm->host_user_msrs[i]);
rdtscll(vcpu->host_tsc);
put_cpu();
@ -649,31 +667,34 @@ static void svm_vcpu_decache(struct kvm_vcpu *vcpu)
static void svm_cache_regs(struct kvm_vcpu *vcpu)
{
vcpu->regs[VCPU_REGS_RAX] = vcpu->svm->vmcb->save.rax;
vcpu->regs[VCPU_REGS_RSP] = vcpu->svm->vmcb->save.rsp;
vcpu->rip = vcpu->svm->vmcb->save.rip;
struct vcpu_svm *svm = to_svm(vcpu);
vcpu->regs[VCPU_REGS_RAX] = svm->vmcb->save.rax;
vcpu->regs[VCPU_REGS_RSP] = svm->vmcb->save.rsp;
vcpu->rip = svm->vmcb->save.rip;
}
static void svm_decache_regs(struct kvm_vcpu *vcpu)
{
vcpu->svm->vmcb->save.rax = vcpu->regs[VCPU_REGS_RAX];
vcpu->svm->vmcb->save.rsp = vcpu->regs[VCPU_REGS_RSP];
vcpu->svm->vmcb->save.rip = vcpu->rip;
struct vcpu_svm *svm = to_svm(vcpu);
svm->vmcb->save.rax = vcpu->regs[VCPU_REGS_RAX];
svm->vmcb->save.rsp = vcpu->regs[VCPU_REGS_RSP];
svm->vmcb->save.rip = vcpu->rip;
}
static unsigned long svm_get_rflags(struct kvm_vcpu *vcpu)
{
return vcpu->svm->vmcb->save.rflags;
return to_svm(vcpu)->vmcb->save.rflags;
}
static void svm_set_rflags(struct kvm_vcpu *vcpu, unsigned long rflags)
{
vcpu->svm->vmcb->save.rflags = 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 = &vcpu->svm->vmcb->save;
struct vmcb_save_area *save = &to_svm(vcpu)->vmcb->save;
switch (seg) {
case VCPU_SREG_CS: return &save->cs;
@ -725,26 +746,34 @@ static void svm_get_cs_db_l_bits(struct kvm_vcpu *vcpu, int *db, int *l)
static void svm_get_idt(struct kvm_vcpu *vcpu, struct descriptor_table *dt)
{
dt->limit = vcpu->svm->vmcb->save.idtr.limit;
dt->base = vcpu->svm->vmcb->save.idtr.base;
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)
{
vcpu->svm->vmcb->save.idtr.limit = dt->limit;
vcpu->svm->vmcb->save.idtr.base = dt->base ;
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)
{
dt->limit = vcpu->svm->vmcb->save.gdtr.limit;
dt->base = vcpu->svm->vmcb->save.gdtr.base;
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)
{
vcpu->svm->vmcb->save.gdtr.limit = dt->limit;
vcpu->svm->vmcb->save.gdtr.base = dt->base ;
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)
@ -753,39 +782,42 @@ 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->shadow_efer & KVM_EFER_LME) {
if (!is_paging(vcpu) && (cr0 & X86_CR0_PG)) {
vcpu->shadow_efer |= KVM_EFER_LMA;
vcpu->svm->vmcb->save.efer |= KVM_EFER_LMA | KVM_EFER_LME;
svm->vmcb->save.efer |= KVM_EFER_LMA | KVM_EFER_LME;
}
if (is_paging(vcpu) && !(cr0 & X86_CR0_PG) ) {
vcpu->shadow_efer &= ~KVM_EFER_LMA;
vcpu->svm->vmcb->save.efer &= ~(KVM_EFER_LMA | KVM_EFER_LME);
svm->vmcb->save.efer &= ~(KVM_EFER_LMA | KVM_EFER_LME);
}
}
#endif
if ((vcpu->cr0 & X86_CR0_TS) && !(cr0 & X86_CR0_TS)) {
vcpu->svm->vmcb->control.intercept_exceptions &= ~(1 << NM_VECTOR);
svm->vmcb->control.intercept_exceptions &= ~(1 << NM_VECTOR);
vcpu->fpu_active = 1;
}
vcpu->cr0 = cr0;
cr0 |= X86_CR0_PG | X86_CR0_WP;
cr0 &= ~(X86_CR0_CD | X86_CR0_NW);
vcpu->svm->vmcb->save.cr0 = cr0;
svm->vmcb->save.cr0 = cr0;
}
static void svm_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
{
vcpu->cr4 = cr4;
vcpu->svm->vmcb->save.cr4 = cr4 | X86_CR4_PAE;
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;
@ -804,16 +836,16 @@ static void svm_set_segment(struct kvm_vcpu *vcpu,
s->attrib |= (var->g & 1) << SVM_SELECTOR_G_SHIFT;
}
if (seg == VCPU_SREG_CS)
vcpu->svm->vmcb->save.cpl
= (vcpu->svm->vmcb->save.cs.attrib
svm->vmcb->save.cpl
= (svm->vmcb->save.cs.attrib
>> SVM_SELECTOR_DPL_SHIFT) & 3;
}
/* FIXME:
vcpu->svm->vmcb->control.int_ctl &= ~V_TPR_MASK;
vcpu->svm->vmcb->control.int_ctl |= (sregs->cr8 & V_TPR_MASK);
svm(vcpu)->vmcb->control.int_ctl &= ~V_TPR_MASK;
svm(vcpu)->vmcb->control.int_ctl |= (sregs->cr8 & V_TPR_MASK);
*/
@ -825,55 +857,59 @@ static int svm_guest_debug(struct kvm_vcpu *vcpu, struct kvm_debug_guest *dbg)
static void load_host_msrs(struct kvm_vcpu *vcpu)
{
#ifdef CONFIG_X86_64
wrmsrl(MSR_GS_BASE, vcpu->svm->host_gs_base);
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, vcpu->svm->host_gs_base);
rdmsrl(MSR_GS_BASE, to_svm(vcpu)->host_gs_base);
#endif
}
static void new_asid(struct kvm_vcpu *vcpu, struct svm_cpu_data *svm_data)
{
struct vcpu_svm *svm = to_svm(vcpu);
if (svm_data->next_asid > svm_data->max_asid) {
++svm_data->asid_generation;
svm_data->next_asid = 1;
vcpu->svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID;
svm->vmcb->control.tlb_ctl = TLB_CONTROL_FLUSH_ALL_ASID;
}
vcpu->cpu = svm_data->cpu;
vcpu->svm->asid_generation = svm_data->asid_generation;
vcpu->svm->vmcb->control.asid = svm_data->next_asid++;
svm->asid_generation = svm_data->asid_generation;
svm->vmcb->control.asid = svm_data->next_asid++;
}
static void svm_invlpg(struct kvm_vcpu *vcpu, gva_t address)
{
invlpga(address, vcpu->svm->vmcb->control.asid); // is needed?
invlpga(address, to_svm(vcpu)->vmcb->control.asid); // is needed?
}
static unsigned long svm_get_dr(struct kvm_vcpu *vcpu, int dr)
{
return vcpu->svm->db_regs[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 (vcpu->svm->vmcb->save.dr7 & DR7_GD_MASK) {
vcpu->svm->vmcb->save.dr7 &= ~DR7_GD_MASK;
vcpu->svm->vmcb->save.dr6 |= DR6_BD_MASK;
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:
vcpu->svm->db_regs[dr] = value;
svm->db_regs[dr] = value;
return;
case 4 ... 5:
if (vcpu->cr4 & X86_CR4_DE) {
@ -885,7 +921,7 @@ static void svm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long value,
*exception = GP_VECTOR;
return;
}
vcpu->svm->vmcb->save.dr7 = value;
svm->vmcb->save.dr7 = value;
return;
}
default:
@ -898,7 +934,8 @@ static void svm_set_dr(struct kvm_vcpu *vcpu, int dr, unsigned long value,
static int pf_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
u32 exit_int_info = vcpu->svm->vmcb->control.exit_int_info;
struct vcpu_svm *svm = to_svm(vcpu);
u32 exit_int_info = svm->vmcb->control.exit_int_info;
u64 fault_address;
u32 error_code;
enum emulation_result er;
@ -909,8 +946,8 @@ static int pf_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
spin_lock(&vcpu->kvm->lock);
fault_address = vcpu->svm->vmcb->control.exit_info_2;
error_code = vcpu->svm->vmcb->control.exit_info_1;
fault_address = svm->vmcb->control.exit_info_2;
error_code = svm->vmcb->control.exit_info_1;
r = kvm_mmu_page_fault(vcpu, fault_address, error_code);
if (r < 0) {
spin_unlock(&vcpu->kvm->lock);
@ -942,22 +979,25 @@ static int pf_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
static int nm_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
vcpu->svm->vmcb->control.intercept_exceptions &= ~(1 << NM_VECTOR);
if (!(vcpu->cr0 & X86_CR0_TS))
vcpu->svm->vmcb->save.cr0 &= ~X86_CR0_TS;
vcpu->fpu_active = 1;
struct vcpu_svm *svm = to_svm(vcpu);
return 1;
svm->vmcb->control.intercept_exceptions &= ~(1 << NM_VECTOR);
if (!(vcpu->cr0 & X86_CR0_TS))
svm->vmcb->save.cr0 &= ~X86_CR0_TS;
vcpu->fpu_active = 1;
return 1;
}
static int shutdown_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
struct vcpu_svm *svm = to_svm(vcpu);
/*
* VMCB is undefined after a SHUTDOWN intercept
* so reinitialize it.
*/
clear_page(vcpu->svm->vmcb);
init_vmcb(vcpu->svm->vmcb);
clear_page(svm->vmcb);
init_vmcb(svm->vmcb);
kvm_run->exit_reason = KVM_EXIT_SHUTDOWN;
return 0;
@ -967,23 +1007,24 @@ static int io_get_override(struct kvm_vcpu *vcpu,
struct vmcb_seg **seg,
int *addr_override)
{
struct vcpu_svm *svm = to_svm(vcpu);
u8 inst[MAX_INST_SIZE];
unsigned ins_length;
gva_t rip;
int i;
rip = vcpu->svm->vmcb->save.rip;
ins_length = vcpu->svm->next_rip - rip;
rip += vcpu->svm->vmcb->save.cs.base;
rip = svm->vmcb->save.rip;
ins_length = svm->next_rip - rip;
rip += svm->vmcb->save.cs.base;
if (ins_length > MAX_INST_SIZE)
printk(KERN_DEBUG
"%s: inst length err, cs base 0x%llx rip 0x%llx "
"next rip 0x%llx ins_length %u\n",
__FUNCTION__,
vcpu->svm->vmcb->save.cs.base,
vcpu->svm->vmcb->save.rip,
vcpu->svm->vmcb->control.exit_info_2,
svm->vmcb->save.cs.base,
svm->vmcb->save.rip,
svm->vmcb->control.exit_info_2,
ins_length);
if (kvm_read_guest(vcpu, rip, ins_length, inst) != ins_length)
@ -1003,22 +1044,22 @@ static int io_get_override(struct kvm_vcpu *vcpu,
*addr_override = 1;
continue;
case 0x2e:
*seg = &vcpu->svm->vmcb->save.cs;
*seg = &svm->vmcb->save.cs;
continue;
case 0x36:
*seg = &vcpu->svm->vmcb->save.ss;
*seg = &svm->vmcb->save.ss;
continue;
case 0x3e:
*seg = &vcpu->svm->vmcb->save.ds;
*seg = &svm->vmcb->save.ds;
continue;
case 0x26:
*seg = &vcpu->svm->vmcb->save.es;
*seg = &svm->vmcb->save.es;
continue;
case 0x64:
*seg = &vcpu->svm->vmcb->save.fs;
*seg = &svm->vmcb->save.fs;
continue;
case 0x65:
*seg = &vcpu->svm->vmcb->save.gs;
*seg = &svm->vmcb->save.gs;
continue;
default:
return 1;
@ -1033,7 +1074,8 @@ static unsigned long io_adress(struct kvm_vcpu *vcpu, int ins, gva_t *address)
unsigned long *reg;
struct vmcb_seg *seg;
int addr_override;
struct vmcb_save_area *save_area = &vcpu->svm->vmcb->save;
struct vcpu_svm *svm = to_svm(vcpu);
struct vmcb_save_area *save_area = &svm->vmcb->save;
u16 cs_attrib = save_area->cs.attrib;
unsigned addr_size = get_addr_size(vcpu);
@ -1045,16 +1087,16 @@ static unsigned long io_adress(struct kvm_vcpu *vcpu, int ins, gva_t *address)
if (ins) {
reg = &vcpu->regs[VCPU_REGS_RDI];
seg = &vcpu->svm->vmcb->save.es;
seg = &svm->vmcb->save.es;
} else {
reg = &vcpu->regs[VCPU_REGS_RSI];
seg = (seg) ? seg : &vcpu->svm->vmcb->save.ds;
seg = (seg) ? seg : &svm->vmcb->save.ds;
}
addr_mask = ~0ULL >> (64 - (addr_size * 8));
if ((cs_attrib & SVM_SELECTOR_L_MASK) &&
!(vcpu->svm->vmcb->save.rflags & X86_EFLAGS_VM)) {
!(svm->vmcb->save.rflags & X86_EFLAGS_VM)) {
*address = (*reg & addr_mask);
return addr_mask;
}
@ -1070,7 +1112,8 @@ static unsigned long io_adress(struct kvm_vcpu *vcpu, int ins, gva_t *address)
static int io_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
u32 io_info = vcpu->svm->vmcb->control.exit_info_1; //address size bug?
struct vcpu_svm *svm = to_svm(vcpu);
u32 io_info = svm->vmcb->control.exit_info_1; //address size bug?
int size, down, in, string, rep;
unsigned port;
unsigned long count;
@ -1078,7 +1121,7 @@ static int io_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
++vcpu->stat.io_exits;
vcpu->svm->next_rip = vcpu->svm->vmcb->control.exit_info_2;
svm->next_rip = svm->vmcb->control.exit_info_2;
in = (io_info & SVM_IOIO_TYPE_MASK) != 0;
port = io_info >> 16;
@ -1086,7 +1129,7 @@ static int io_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
string = (io_info & SVM_IOIO_STR_MASK) != 0;
rep = (io_info & SVM_IOIO_REP_MASK) != 0;
count = 1;
down = (vcpu->svm->vmcb->save.rflags & X86_EFLAGS_DF) != 0;
down = (svm->vmcb->save.rflags & X86_EFLAGS_DF) != 0;
if (string) {
unsigned addr_mask;
@ -1112,14 +1155,18 @@ static int nop_on_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
static int halt_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 1;
struct vcpu_svm *svm = to_svm(vcpu);
svm->next_rip = svm->vmcb->save.rip + 1;
skip_emulated_instruction(vcpu);
return kvm_emulate_halt(vcpu);
}
static int vmmcall_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 3;
struct vcpu_svm *svm = to_svm(vcpu);
svm->next_rip = svm->vmcb->save.rip + 3;
skip_emulated_instruction(vcpu);
return kvm_hypercall(vcpu, kvm_run);
}
@ -1139,7 +1186,9 @@ static int task_switch_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_r
static int cpuid_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 2;
struct vcpu_svm *svm = to_svm(vcpu);
svm->next_rip = svm->vmcb->save.rip + 2;
kvm_emulate_cpuid(vcpu);
return 1;
}
@ -1153,39 +1202,41 @@ static int emulate_on_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_ru
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 = vcpu->svm->vmcb->control.tsc_offset + tsc;
*data = svm->vmcb->control.tsc_offset + tsc;
break;
}
case MSR_K6_STAR:
*data = vcpu->svm->vmcb->save.star;
*data = svm->vmcb->save.star;
break;
#ifdef CONFIG_X86_64
case MSR_LSTAR:
*data = vcpu->svm->vmcb->save.lstar;
*data = svm->vmcb->save.lstar;
break;
case MSR_CSTAR:
*data = vcpu->svm->vmcb->save.cstar;
*data = svm->vmcb->save.cstar;
break;
case MSR_KERNEL_GS_BASE:
*data = vcpu->svm->vmcb->save.kernel_gs_base;
*data = svm->vmcb->save.kernel_gs_base;
break;
case MSR_SYSCALL_MASK:
*data = vcpu->svm->vmcb->save.sfmask;
*data = svm->vmcb->save.sfmask;
break;
#endif
case MSR_IA32_SYSENTER_CS:
*data = vcpu->svm->vmcb->save.sysenter_cs;
*data = svm->vmcb->save.sysenter_cs;
break;
case MSR_IA32_SYSENTER_EIP:
*data = vcpu->svm->vmcb->save.sysenter_eip;
*data = svm->vmcb->save.sysenter_eip;
break;
case MSR_IA32_SYSENTER_ESP:
*data = vcpu->svm->vmcb->save.sysenter_esp;
*data = svm->vmcb->save.sysenter_esp;
break;
default:
return kvm_get_msr_common(vcpu, ecx, data);
@ -1195,15 +1246,16 @@ static int svm_get_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 *data)
static int rdmsr_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
struct vcpu_svm *svm = to_svm(vcpu);
u32 ecx = vcpu->regs[VCPU_REGS_RCX];
u64 data;
if (svm_get_msr(vcpu, ecx, &data))
svm_inject_gp(vcpu, 0);
else {
vcpu->svm->vmcb->save.rax = data & 0xffffffff;
svm->vmcb->save.rax = data & 0xffffffff;
vcpu->regs[VCPU_REGS_RDX] = data >> 32;
vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 2;
svm->next_rip = svm->vmcb->save.rip + 2;
skip_emulated_instruction(vcpu);
}
return 1;
@ -1211,39 +1263,41 @@ static int rdmsr_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
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);
vcpu->svm->vmcb->control.tsc_offset = data - tsc;
svm->vmcb->control.tsc_offset = data - tsc;
break;
}
case MSR_K6_STAR:
vcpu->svm->vmcb->save.star = data;
svm->vmcb->save.star = data;
break;
#ifdef CONFIG_X86_64
case MSR_LSTAR:
vcpu->svm->vmcb->save.lstar = data;
svm->vmcb->save.lstar = data;
break;
case MSR_CSTAR:
vcpu->svm->vmcb->save.cstar = data;
svm->vmcb->save.cstar = data;
break;
case MSR_KERNEL_GS_BASE:
vcpu->svm->vmcb->save.kernel_gs_base = data;
svm->vmcb->save.kernel_gs_base = data;
break;
case MSR_SYSCALL_MASK:
vcpu->svm->vmcb->save.sfmask = data;
svm->vmcb->save.sfmask = data;
break;
#endif
case MSR_IA32_SYSENTER_CS:
vcpu->svm->vmcb->save.sysenter_cs = data;
svm->vmcb->save.sysenter_cs = data;
break;
case MSR_IA32_SYSENTER_EIP:
vcpu->svm->vmcb->save.sysenter_eip = data;
svm->vmcb->save.sysenter_eip = data;
break;
case MSR_IA32_SYSENTER_ESP:
vcpu->svm->vmcb->save.sysenter_esp = data;
svm->vmcb->save.sysenter_esp = data;
break;
default:
return kvm_set_msr_common(vcpu, ecx, data);
@ -1253,10 +1307,11 @@ static int svm_set_msr(struct kvm_vcpu *vcpu, unsigned ecx, u64 data)
static int wrmsr_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
struct vcpu_svm *svm = to_svm(vcpu);
u32 ecx = vcpu->regs[VCPU_REGS_RCX];
u64 data = (vcpu->svm->vmcb->save.rax & -1u)
u64 data = (svm->vmcb->save.rax & -1u)
| ((u64)(vcpu->regs[VCPU_REGS_RDX] & -1u) << 32);
vcpu->svm->next_rip = vcpu->svm->vmcb->save.rip + 2;
svm->next_rip = svm->vmcb->save.rip + 2;
if (svm_set_msr(vcpu, ecx, data))
svm_inject_gp(vcpu, 0);
else
@ -1266,7 +1321,7 @@ static int wrmsr_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
static int msr_interception(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
if (vcpu->svm->vmcb->control.exit_info_1)
if (to_svm(vcpu)->vmcb->control.exit_info_1)
return wrmsr_interception(vcpu, kvm_run);
else
return rdmsr_interception(vcpu, kvm_run);
@ -1338,13 +1393,14 @@ static int (*svm_exit_handlers[])(struct kvm_vcpu *vcpu,
static int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
u32 exit_code = vcpu->svm->vmcb->control.exit_code;
struct vcpu_svm *svm = to_svm(vcpu);
u32 exit_code = svm->vmcb->control.exit_code;
if (is_external_interrupt(vcpu->svm->vmcb->control.exit_int_info) &&
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__, vcpu->svm->vmcb->control.exit_int_info,
__FUNCTION__, svm->vmcb->control.exit_int_info,
exit_code);
if (exit_code >= ARRAY_SIZE(svm_exit_handlers)
@ -1368,13 +1424,14 @@ static void reload_tss(struct kvm_vcpu *vcpu)
static void pre_svm_run(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm = to_svm(vcpu);
int cpu = raw_smp_processor_id();
struct svm_cpu_data *svm_data = per_cpu(svm_data, cpu);
vcpu->svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;
svm->vmcb->control.tlb_ctl = TLB_CONTROL_DO_NOTHING;
if (vcpu->cpu != cpu ||
vcpu->svm->asid_generation != svm_data->asid_generation)
svm->asid_generation != svm_data->asid_generation)
new_asid(vcpu, svm_data);
}
@ -1383,7 +1440,7 @@ static inline void kvm_do_inject_irq(struct kvm_vcpu *vcpu)
{
struct vmcb_control_area *control;
control = &vcpu->svm->vmcb->control;
control = &to_svm(vcpu)->vmcb->control;
control->int_vector = pop_irq(vcpu);
control->int_ctl &= ~V_INTR_PRIO_MASK;
control->int_ctl |= V_IRQ_MASK |
@ -1392,7 +1449,7 @@ static inline void kvm_do_inject_irq(struct kvm_vcpu *vcpu)
static void kvm_reput_irq(struct kvm_vcpu *vcpu)
{
struct vmcb_control_area *control = &vcpu->svm->vmcb->control;
struct vmcb_control_area *control = &to_svm(vcpu)->vmcb->control;
if (control->int_ctl & V_IRQ_MASK) {
control->int_ctl &= ~V_IRQ_MASK;
@ -1406,11 +1463,12 @@ static void kvm_reput_irq(struct kvm_vcpu *vcpu)
static void do_interrupt_requests(struct kvm_vcpu *vcpu,
struct kvm_run *kvm_run)
{
struct vmcb_control_area *control = &vcpu->svm->vmcb->control;
struct vcpu_svm *svm = to_svm(vcpu);
struct vmcb_control_area *control = &svm->vmcb->control;
vcpu->interrupt_window_open =
(!(control->int_state & SVM_INTERRUPT_SHADOW_MASK) &&
(vcpu->svm->vmcb->save.rflags & X86_EFLAGS_IF));
(svm->vmcb->save.rflags & X86_EFLAGS_IF));
if (vcpu->interrupt_window_open && vcpu->irq_summary)
/*
@ -1431,9 +1489,11 @@ static void do_interrupt_requests(struct kvm_vcpu *vcpu,
static void post_kvm_run_save(struct kvm_vcpu *vcpu,
struct kvm_run *kvm_run)
{
struct vcpu_svm *svm = to_svm(vcpu);
kvm_run->ready_for_interrupt_injection = (vcpu->interrupt_window_open &&
vcpu->irq_summary == 0);
kvm_run->if_flag = (vcpu->svm->vmcb->save.rflags & X86_EFLAGS_IF) != 0;
kvm_run->if_flag = (svm->vmcb->save.rflags & X86_EFLAGS_IF) != 0;
kvm_run->cr8 = vcpu->cr8;
kvm_run->apic_base = vcpu->apic_base;
}
@ -1450,7 +1510,7 @@ static int dm_request_for_irq_injection(struct kvm_vcpu *vcpu,
return (!vcpu->irq_summary &&
kvm_run->request_interrupt_window &&
vcpu->interrupt_window_open &&
(vcpu->svm->vmcb->save.rflags & X86_EFLAGS_IF));
(to_svm(vcpu)->vmcb->save.rflags & X86_EFLAGS_IF));
}
static void save_db_regs(unsigned long *db_regs)
@ -1476,6 +1536,7 @@ static void svm_flush_tlb(struct kvm_vcpu *vcpu)
static int 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;
@ -1502,15 +1563,15 @@ again:
fs_selector = read_fs();
gs_selector = read_gs();
ldt_selector = read_ldt();
vcpu->svm->host_cr2 = kvm_read_cr2();
vcpu->svm->host_dr6 = read_dr6();
vcpu->svm->host_dr7 = read_dr7();
vcpu->svm->vmcb->save.cr2 = vcpu->cr2;
svm->host_cr2 = kvm_read_cr2();
svm->host_dr6 = read_dr6();
svm->host_dr7 = read_dr7();
svm->vmcb->save.cr2 = vcpu->cr2;
if (vcpu->svm->vmcb->save.dr7 & 0xff) {
if (svm->vmcb->save.dr7 & 0xff) {
write_dr7(0);
save_db_regs(vcpu->svm->host_db_regs);
load_db_regs(vcpu->svm->db_regs);
save_db_regs(svm->host_db_regs);
load_db_regs(svm->db_regs);
}
if (vcpu->fpu_active) {
@ -1607,7 +1668,7 @@ again:
#endif
:
: [vcpu]"a"(vcpu),
[svm]"i"(offsetof(struct kvm_vcpu, svm)),
[svm]"i"(offsetof(struct kvm_vcpu, _priv)),
[vmcb]"i"(offsetof(struct vcpu_svm, vmcb_pa)),
[rbx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RBX])),
[rcx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RCX])),
@ -1634,14 +1695,14 @@ again:
fx_restore(vcpu->host_fx_image);
}
if ((vcpu->svm->vmcb->save.dr7 & 0xff))
load_db_regs(vcpu->svm->host_db_regs);
if ((svm->vmcb->save.dr7 & 0xff))
load_db_regs(svm->host_db_regs);
vcpu->cr2 = vcpu->svm->vmcb->save.cr2;
vcpu->cr2 = svm->vmcb->save.cr2;
write_dr6(vcpu->svm->host_dr6);
write_dr7(vcpu->svm->host_dr7);
kvm_write_cr2(vcpu->svm->host_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);
@ -1655,18 +1716,18 @@ again:
*/
if (unlikely(prof_on == KVM_PROFILING))
profile_hit(KVM_PROFILING,
(void *)(unsigned long)vcpu->svm->vmcb->save.rip);
(void *)(unsigned long)svm->vmcb->save.rip);
stgi();
kvm_reput_irq(vcpu);
vcpu->svm->next_rip = 0;
svm->next_rip = 0;
if (vcpu->svm->vmcb->control.exit_code == SVM_EXIT_ERR) {
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
= vcpu->svm->vmcb->control.exit_code;
= svm->vmcb->control.exit_code;
post_kvm_run_save(vcpu, kvm_run);
return 0;
}
@ -1695,12 +1756,14 @@ again:
static void svm_set_cr3(struct kvm_vcpu *vcpu, unsigned long root)
{
vcpu->svm->vmcb->save.cr3 = root;
struct vcpu_svm *svm = to_svm(vcpu);
svm->vmcb->save.cr3 = root;
force_new_asid(vcpu);
if (vcpu->fpu_active) {
vcpu->svm->vmcb->control.intercept_exceptions |= (1 << NM_VECTOR);
vcpu->svm->vmcb->save.cr0 |= X86_CR0_TS;
svm->vmcb->control.intercept_exceptions |= (1 << NM_VECTOR);
svm->vmcb->save.cr0 |= X86_CR0_TS;
vcpu->fpu_active = 0;
}
}
@ -1709,26 +1772,27 @@ static void svm_inject_page_fault(struct kvm_vcpu *vcpu,
unsigned long addr,
uint32_t err_code)
{
uint32_t exit_int_info = vcpu->svm->vmcb->control.exit_int_info;
struct vcpu_svm *svm = to_svm(vcpu);
uint32_t exit_int_info = svm->vmcb->control.exit_int_info;
++vcpu->stat.pf_guest;
if (is_page_fault(exit_int_info)) {
vcpu->svm->vmcb->control.event_inj_err = 0;
vcpu->svm->vmcb->control.event_inj = SVM_EVTINJ_VALID |
SVM_EVTINJ_VALID_ERR |
SVM_EVTINJ_TYPE_EXEPT |
DF_VECTOR;
svm->vmcb->control.event_inj_err = 0;
svm->vmcb->control.event_inj = SVM_EVTINJ_VALID |
SVM_EVTINJ_VALID_ERR |
SVM_EVTINJ_TYPE_EXEPT |
DF_VECTOR;
return;
}
vcpu->cr2 = addr;
vcpu->svm->vmcb->save.cr2 = addr;
vcpu->svm->vmcb->control.event_inj = SVM_EVTINJ_VALID |
SVM_EVTINJ_VALID_ERR |
SVM_EVTINJ_TYPE_EXEPT |
PF_VECTOR;
vcpu->svm->vmcb->control.event_inj_err = err_code;
svm->vmcb->save.cr2 = addr;
svm->vmcb->control.event_inj = SVM_EVTINJ_VALID |
SVM_EVTINJ_VALID_ERR |
SVM_EVTINJ_TYPE_EXEPT |
PF_VECTOR;
svm->vmcb->control.event_inj_err = err_code;
}

249
drivers/kvm/vmx.c
View File

@ -32,6 +32,37 @@
MODULE_AUTHOR("Qumranet");
MODULE_LICENSE("GPL");
struct vmcs {
u32 revision_id;
u32 abort;
char data[0];
};
struct vcpu_vmx {
struct kvm_vcpu *vcpu;
int launched;
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 fs_gs_ldt_reload_needed;
}host_state;
};
static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu)
{
return (struct vcpu_vmx*)vcpu->_priv;
}
static int init_rmode_tss(struct kvm *kvm);
static DEFINE_PER_CPU(struct vmcs *, vmxarea);
@ -89,16 +120,33 @@ static const u32 vmx_msr_index[] = {
};
#define NR_VMX_MSR ARRAY_SIZE(vmx_msr_index)
static inline u64 msr_efer_save_restore_bits(struct vmx_msr_entry msr)
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 u64 msr_efer_save_restore_bits(struct kvm_msr_entry msr)
{
return (u64)msr.data & EFER_SAVE_RESTORE_BITS;
}
static inline int msr_efer_need_save_restore(struct kvm_vcpu *vcpu)
{
int efer_offset = vcpu->msr_offset_efer;
return msr_efer_save_restore_bits(vcpu->host_msrs[efer_offset]) !=
msr_efer_save_restore_bits(vcpu->guest_msrs[efer_offset]);
struct vcpu_vmx *vmx = to_vmx(vcpu);
int efer_offset = vmx->msr_offset_efer;
return msr_efer_save_restore_bits(vmx->host_msrs[efer_offset]) !=
msr_efer_save_restore_bits(vmx->guest_msrs[efer_offset]);
}
static inline int is_page_fault(u32 intr_info)
@ -123,21 +171,23 @@ static inline int is_external_interrupt(u32 intr_info)
static int __find_msr_index(struct kvm_vcpu *vcpu, u32 msr)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
int i;
for (i = 0; i < vcpu->nmsrs; ++i)
if (vcpu->guest_msrs[i].index == msr)
for (i = 0; i < vmx->nmsrs; ++i)
if (vmx->guest_msrs[i].index == msr)
return i;
return -1;
}
static struct vmx_msr_entry *find_msr_entry(struct kvm_vcpu *vcpu, u32 msr)
static struct kvm_msr_entry *find_msr_entry(struct kvm_vcpu *vcpu, u32 msr)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
int i;
i = __find_msr_index(vcpu, msr);
if (i >= 0)
return &vcpu->guest_msrs[i];
return &vmx->guest_msrs[i];
return NULL;
}
@ -157,11 +207,12 @@ static void vmcs_clear(struct vmcs *vmcs)
static void __vcpu_clear(void *arg)
{
struct kvm_vcpu *vcpu = arg;
struct vcpu_vmx *vmx = to_vmx(vcpu);
int cpu = raw_smp_processor_id();
if (vcpu->cpu == cpu)
vmcs_clear(vcpu->vmcs);
if (per_cpu(current_vmcs, cpu) == vcpu->vmcs)
vmcs_clear(vmx->vmcs);
if (per_cpu(current_vmcs, cpu) == vmx->vmcs)
per_cpu(current_vmcs, cpu) = NULL;
rdtscll(vcpu->host_tsc);
}
@ -172,7 +223,7 @@ static void vcpu_clear(struct kvm_vcpu *vcpu)
smp_call_function_single(vcpu->cpu, __vcpu_clear, vcpu, 0, 1);
else
__vcpu_clear(vcpu);
vcpu->launched = 0;
to_vmx(vcpu)->launched = 0;
}
static unsigned long vmcs_readl(unsigned long field)
@ -285,80 +336,81 @@ static void reload_tss(void)
static void load_transition_efer(struct kvm_vcpu *vcpu)
{
u64 trans_efer;
int efer_offset = vcpu->msr_offset_efer;
struct vcpu_vmx *vmx = to_vmx(vcpu);
int efer_offset = vmx->msr_offset_efer;
trans_efer = vcpu->host_msrs[efer_offset].data;
trans_efer = vmx->host_msrs[efer_offset].data;
trans_efer &= ~EFER_SAVE_RESTORE_BITS;
trans_efer |= msr_efer_save_restore_bits(
vcpu->guest_msrs[efer_offset]);
trans_efer |= msr_efer_save_restore_bits(vmx->guest_msrs[efer_offset]);
wrmsrl(MSR_EFER, trans_efer);
vcpu->stat.efer_reload++;
}
static void vmx_save_host_state(struct kvm_vcpu *vcpu)
{
struct vmx_host_state *hs = &vcpu->vmx_host_state;
struct vcpu_vmx *vmx = to_vmx(vcpu);
if (hs->loaded)
if (vmx->host_state.loaded)
return;
hs->loaded = 1;
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.
*/
hs->ldt_sel = read_ldt();
hs->fs_gs_ldt_reload_needed = hs->ldt_sel;
hs->fs_sel = read_fs();
if (!(hs->fs_sel & 7))
vmcs_write16(HOST_FS_SELECTOR, hs->fs_sel);
vmx->host_state.ldt_sel = read_ldt();
vmx->host_state.fs_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);
else {
vmcs_write16(HOST_FS_SELECTOR, 0);
hs->fs_gs_ldt_reload_needed = 1;
vmx->host_state.fs_gs_ldt_reload_needed = 1;
}
hs->gs_sel = read_gs();
if (!(hs->gs_sel & 7))
vmcs_write16(HOST_GS_SELECTOR, hs->gs_sel);
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);
hs->fs_gs_ldt_reload_needed = 1;
vmx->host_state.fs_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(hs->fs_sel));
vmcs_writel(HOST_GS_BASE, segment_base(hs->gs_sel));
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(vcpu)) {
save_msrs(vcpu->host_msrs + vcpu->msr_offset_kernel_gs_base, 1);
save_msrs(vmx->host_msrs +
vmx->msr_offset_kernel_gs_base, 1);
}
#endif
load_msrs(vcpu->guest_msrs, vcpu->save_nmsrs);
load_msrs(vmx->guest_msrs, vmx->save_nmsrs);
if (msr_efer_need_save_restore(vcpu))
load_transition_efer(vcpu);
}
static void vmx_load_host_state(struct kvm_vcpu *vcpu)
{
struct vmx_host_state *hs = &vcpu->vmx_host_state;
struct vcpu_vmx *vmx = to_vmx(vcpu);
if (!hs->loaded)
if (!vmx->host_state.loaded)
return;
hs->loaded = 0;
if (hs->fs_gs_ldt_reload_needed) {
load_ldt(hs->ldt_sel);
load_fs(hs->fs_sel);
vmx->host_state.loaded = 0;
if (vmx->host_state.fs_gs_ldt_reload_needed) {
load_ldt(vmx->host_state.ldt_sel);
load_fs(vmx->host_state.fs_sel);
/*
* If we have to reload gs, we must take care to
* preserve our gs base.
*/
local_irq_disable();
load_gs(hs->gs_sel);
load_gs(vmx->host_state.gs_sel);
#ifdef CONFIG_X86_64
wrmsrl(MSR_GS_BASE, vmcs_readl(HOST_GS_BASE));
#endif
@ -366,10 +418,10 @@ static void vmx_load_host_state(struct kvm_vcpu *vcpu)
reload_tss();
}
save_msrs(vcpu->guest_msrs, vcpu->save_nmsrs);
load_msrs(vcpu->host_msrs, vcpu->save_nmsrs);
save_msrs(vmx->guest_msrs, vmx->save_nmsrs);
load_msrs(vmx->host_msrs, vmx->save_nmsrs);
if (msr_efer_need_save_restore(vcpu))
load_msrs(vcpu->host_msrs + vcpu->msr_offset_efer, 1);
load_msrs(vmx->host_msrs + vmx->msr_offset_efer, 1);
}
/*
@ -378,7 +430,8 @@ static void vmx_load_host_state(struct kvm_vcpu *vcpu)
*/
static void vmx_vcpu_load(struct kvm_vcpu *vcpu)
{
u64 phys_addr = __pa(vcpu->vmcs);
struct vcpu_vmx *vmx = to_vmx(vcpu);
u64 phys_addr = __pa(vmx->vmcs);
int cpu;
u64 tsc_this, delta;
@ -387,16 +440,16 @@ static void vmx_vcpu_load(struct kvm_vcpu *vcpu)
if (vcpu->cpu != cpu)
vcpu_clear(vcpu);
if (per_cpu(current_vmcs, cpu) != vcpu->vmcs) {
if (per_cpu(current_vmcs, cpu) != vmx->vmcs) {
u8 error;
per_cpu(current_vmcs, cpu) = vcpu->vmcs;
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",
vcpu->vmcs, phys_addr);
vmx->vmcs, phys_addr);
}
if (vcpu->cpu != cpu) {
@ -503,13 +556,15 @@ static void vmx_inject_gp(struct kvm_vcpu *vcpu, unsigned error_code)
*/
void move_msr_up(struct kvm_vcpu *vcpu, int from, int to)
{
struct vmx_msr_entry tmp;
tmp = vcpu->guest_msrs[to];
vcpu->guest_msrs[to] = vcpu->guest_msrs[from];
vcpu->guest_msrs[from] = tmp;
tmp = vcpu->host_msrs[to];
vcpu->host_msrs[to] = vcpu->host_msrs[from];
vcpu->host_msrs[from] = tmp;
struct vcpu_vmx *vmx = to_vmx(vcpu);
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;
}
/*
@ -519,6 +574,7 @@ void move_msr_up(struct kvm_vcpu *vcpu, int from, int to)
*/
static void setup_msrs(struct kvm_vcpu *vcpu)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
int save_nmsrs;
save_nmsrs = 0;
@ -547,13 +603,13 @@ static void setup_msrs(struct kvm_vcpu *vcpu)
move_msr_up(vcpu, index, save_nmsrs++);
}
#endif
vcpu->save_nmsrs = save_nmsrs;
vmx->save_nmsrs = save_nmsrs;
#ifdef CONFIG_X86_64
vcpu->msr_offset_kernel_gs_base =
vmx->msr_offset_kernel_gs_base =
__find_msr_index(vcpu, MSR_KERNEL_GS_BASE);
#endif
vcpu->msr_offset_efer = __find_msr_index(vcpu, MSR_EFER);
vmx->msr_offset_efer = __find_msr_index(vcpu, MSR_EFER);
}
/*
@ -589,7 +645,7 @@ static void guest_write_tsc(u64 guest_tsc)
static int vmx_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
{
u64 data;
struct vmx_msr_entry *msr;
struct kvm_msr_entry *msr;
if (!pdata) {
printk(KERN_ERR "BUG: get_msr called with NULL pdata\n");
@ -639,14 +695,15 @@ static int vmx_get_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 *pdata)
*/
static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
{
struct vmx_msr_entry *msr;
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 (vcpu->vmx_host_state.loaded)
if (vmx->host_state.loaded)
load_transition_efer(vcpu);
break;
case MSR_FS_BASE:
@ -672,8 +729,8 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, u32 msr_index, u64 data)
msr = find_msr_entry(vcpu, msr_index);
if (msr) {
msr->data = data;
if (vcpu->vmx_host_state.loaded)
load_msrs(vcpu->guest_msrs, vcpu->save_nmsrs);
if (vmx->host_state.loaded)
load_msrs(vmx->guest_msrs, vmx->save_nmsrs);
break;
}
ret = kvm_set_msr_common(vcpu, msr_index, data);
@ -1053,7 +1110,7 @@ static void vmx_set_cr4(struct kvm_vcpu *vcpu, unsigned long cr4)
static void vmx_set_efer(struct kvm_vcpu *vcpu, u64 efer)
{
struct vmx_msr_entry *msr = find_msr_entry(vcpu, MSR_EFER);
struct kvm_msr_entry *msr = find_msr_entry(vcpu, MSR_EFER);
vcpu->shadow_efer = efer;
if (efer & EFER_LMA) {
@ -1244,6 +1301,7 @@ static void seg_setup(int seg)
*/
static int vmx_vcpu_setup(struct kvm_vcpu *vcpu)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
u32 host_sysenter_cs;
u32 junk;
unsigned long a;
@ -1385,18 +1443,18 @@ static int vmx_vcpu_setup(struct kvm_vcpu *vcpu)
u32 index = vmx_msr_index[i];
u32 data_low, data_high;
u64 data;
int j = vcpu->nmsrs;
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);
vcpu->host_msrs[j].index = index;
vcpu->host_msrs[j].reserved = 0;
vcpu->host_msrs[j].data = data;
vcpu->guest_msrs[j] = vcpu->host_msrs[j];
++vcpu->nmsrs;
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;
}
setup_msrs(vcpu);
@ -1999,6 +2057,7 @@ static void vmx_flush_tlb(struct kvm_vcpu *vcpu)
static int vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
u8 fail;
int r;
@ -2123,7 +2182,7 @@ again:
#endif
"setbe %0 \n\t"
: "=q" (fail)
: "r"(vcpu->launched), "d"((unsigned long)HOST_RSP),
: "r"(vmx->launched), "d"((unsigned long)HOST_RSP),
"c"(vcpu),
[rax]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RAX])),
[rbx]"i"(offsetof(struct kvm_vcpu, regs[VCPU_REGS_RBX])),
@ -2167,7 +2226,7 @@ again:
if (unlikely(prof_on == KVM_PROFILING))
profile_hit(KVM_PROFILING, (void *)vmcs_readl(GUEST_RIP));
vcpu->launched = 1;
vmx->launched = 1;
r = kvm_handle_exit(kvm_run, vcpu);
if (r > 0) {
/* Give scheduler a change to reschedule. */
@ -2232,10 +2291,12 @@ static void vmx_inject_page_fault(struct kvm_vcpu *vcpu,
static void vmx_free_vmcs(struct kvm_vcpu *vcpu)
{
if (vcpu->vmcs) {
struct vcpu_vmx *vmx = to_vmx(vcpu);
if (vmx->vmcs) {
on_each_cpu(__vcpu_clear, vcpu, 0, 1);
free_vmcs(vcpu->vmcs);
vcpu->vmcs = NULL;
free_vmcs(vmx->vmcs);
vmx->vmcs = NULL;
}
}
@ -2246,33 +2307,39 @@ static void vmx_free_vcpu(struct kvm_vcpu *vcpu)
static int vmx_create_vcpu(struct kvm_vcpu *vcpu)
{
struct vmcs *vmcs;
struct vcpu_vmx *vmx;
vcpu->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL);
if (!vcpu->guest_msrs)
vmx = kzalloc(sizeof(*vmx), GFP_KERNEL);
if (!vmx)
return -ENOMEM;
vcpu->host_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL);
if (!vcpu->host_msrs)
goto out_free_guest_msrs;
vmx->guest_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL);
if (!vmx->guest_msrs)
goto out_free;
vmcs = alloc_vmcs();
if (!vmcs)
goto out_free_msrs;
vmx->host_msrs = kmalloc(PAGE_SIZE, GFP_KERNEL);
if (!vmx->host_msrs)
goto out_free;
vmcs_clear(vmcs);
vcpu->vmcs = vmcs;
vcpu->launched = 0;
vmx->vmcs = alloc_vmcs();
if (!vmx->vmcs)
goto out_free;
vmcs_clear(vmx->vmcs);
vmx->vcpu = vcpu;
vcpu->_priv = vmx;
return 0;
out_free_msrs:
kfree(vcpu->host_msrs);
vcpu->host_msrs = NULL;
out_free:
if (vmx->host_msrs)
kfree(vmx->host_msrs);
out_free_guest_msrs:
kfree(vcpu->guest_msrs);
vcpu->guest_msrs = NULL;
if (vmx->guest_msrs)
kfree(vmx->guest_msrs);
kfree(vmx);
return -ENOMEM;
}