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Diffstat (limited to 'arch/x86/kvm/vmx.c')
-rw-r--r--arch/x86/kvm/vmx.c80
1 files changed, 75 insertions, 5 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 8e1462880d1..1157e8a4059 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -37,6 +37,9 @@ MODULE_LICENSE("GPL");
static int bypass_guest_pf = 1;
module_param(bypass_guest_pf, bool, 0);
+static int enable_vpid = 1;
+module_param(enable_vpid, bool, 0);
+
struct vmcs {
u32 revision_id;
u32 abort;
@@ -71,6 +74,7 @@ struct vcpu_vmx {
unsigned rip;
} irq;
} rmode;
+ int vpid;
};
static inline struct vcpu_vmx *to_vmx(struct kvm_vcpu *vcpu)
@@ -86,6 +90,9 @@ static DEFINE_PER_CPU(struct vmcs *, current_vmcs);
static struct page *vmx_io_bitmap_a;
static struct page *vmx_io_bitmap_b;
+static DECLARE_BITMAP(vmx_vpid_bitmap, VMX_NR_VPIDS);
+static DEFINE_SPINLOCK(vmx_vpid_lock);
+
static struct vmcs_config {
int size;
int order;
@@ -204,6 +211,12 @@ static inline int vm_need_virtualize_apic_accesses(struct kvm *kvm)
(irqchip_in_kernel(kvm)));
}
+static inline int cpu_has_vmx_vpid(void)
+{
+ return (vmcs_config.cpu_based_2nd_exec_ctrl &
+ SECONDARY_EXEC_ENABLE_VPID);
+}
+
static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr)
{
int i;
@@ -214,6 +227,20 @@ static int __find_msr_index(struct vcpu_vmx *vmx, u32 msr)
return -1;
}
+static inline void __invvpid(int ext, u16 vpid, gva_t gva)
+{
+ struct {
+ u64 vpid : 16;
+ u64 rsvd : 48;
+ u64 gva;
+ } operand = { vpid, 0, gva };
+
+ asm volatile (ASM_VMX_INVVPID
+ /* CF==1 or ZF==1 --> rc = -1 */
+ "; ja 1f ; ud2 ; 1:"
+ : : "a"(&operand), "c"(ext) : "cc", "memory");
+}
+
static struct kvm_msr_entry *find_msr_entry(struct vcpu_vmx *vmx, u32 msr)
{
int i;
@@ -257,6 +284,14 @@ static void vcpu_clear(struct vcpu_vmx *vmx)
vmx->launched = 0;
}
+static inline void vpid_sync_vcpu_all(struct vcpu_vmx *vmx)
+{
+ if (vmx->vpid == 0)
+ return;
+
+ __invvpid(VMX_VPID_EXTENT_SINGLE_CONTEXT, vmx->vpid, 0);
+}
+
static unsigned long vmcs_readl(unsigned long field)
{
unsigned long value;
@@ -490,6 +525,7 @@ static void vmx_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
if (vcpu->cpu != cpu) {
vcpu_clear(vmx);
kvm_migrate_apic_timer(vcpu);
+ vpid_sync_vcpu_all(vmx);
}
if (per_cpu(current_vmcs, cpu) != vmx->vmcs) {
@@ -971,7 +1007,8 @@ static __init int setup_vmcs_config(struct vmcs_config *vmcs_conf)
if (_cpu_based_exec_control & CPU_BASED_ACTIVATE_SECONDARY_CONTROLS) {
min = 0;
opt = SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES |
- SECONDARY_EXEC_WBINVD_EXITING;
+ SECONDARY_EXEC_WBINVD_EXITING |
+ SECONDARY_EXEC_ENABLE_VPID;
if (adjust_vmx_controls(min, opt, MSR_IA32_VMX_PROCBASED_CTLS2,
&_cpu_based_2nd_exec_control) < 0)
return -EIO;
@@ -1239,6 +1276,11 @@ static void exit_lmode(struct kvm_vcpu *vcpu)
#endif
+static void vmx_flush_tlb(struct kvm_vcpu *vcpu)
+{
+ vpid_sync_vcpu_all(to_vmx(vcpu));
+}
+
static void vmx_decache_cr4_guest_bits(struct kvm_vcpu *vcpu)
{
vcpu->arch.cr4 &= KVM_GUEST_CR4_MASK;
@@ -1275,6 +1317,7 @@ static void vmx_set_cr0(struct kvm_vcpu *vcpu, unsigned long cr0)
static void vmx_set_cr3(struct kvm_vcpu *vcpu, unsigned long cr3)
{
+ vmx_flush_tlb(vcpu);
vmcs_writel(GUEST_CR3, cr3);
if (vcpu->arch.cr0 & X86_CR0_PE)
vmx_fpu_deactivate(vcpu);
@@ -1494,6 +1537,22 @@ out:
return r;
}
+static void allocate_vpid(struct vcpu_vmx *vmx)
+{
+ int vpid;
+
+ vmx->vpid = 0;
+ if (!enable_vpid || !cpu_has_vmx_vpid())
+ return;
+ spin_lock(&vmx_vpid_lock);
+ vpid = find_first_zero_bit(vmx_vpid_bitmap, VMX_NR_VPIDS);
+ if (vpid < VMX_NR_VPIDS) {
+ vmx->vpid = vpid;
+ __set_bit(vpid, vmx_vpid_bitmap);
+ }
+ spin_unlock(&vmx_vpid_lock);
+}
+
/*
* Sets up the vmcs for emulated real mode.
*/
@@ -1532,6 +1591,8 @@ static int vmx_vcpu_setup(struct vcpu_vmx *vmx)
if (!vm_need_virtualize_apic_accesses(vmx->vcpu.kvm))
exec_control &=
~SECONDARY_EXEC_VIRTUALIZE_APIC_ACCESSES;
+ if (vmx->vpid == 0)
+ exec_control &= ~SECONDARY_EXEC_ENABLE_VPID;
vmcs_write32(SECONDARY_VM_EXEC_CONTROL, exec_control);
}
@@ -1704,6 +1765,9 @@ static int vmx_vcpu_reset(struct kvm_vcpu *vcpu)
vmcs_write64(APIC_ACCESS_ADDR,
page_to_phys(vmx->vcpu.kvm->arch.apic_access_page));
+ if (vmx->vpid != 0)
+ vmcs_write16(VIRTUAL_PROCESSOR_ID, vmx->vpid);
+
vmx->vcpu.arch.cr0 = 0x60000010;
vmx_set_cr0(&vmx->vcpu, vmx->vcpu.arch.cr0); /* enter rmode */
vmx_set_cr4(&vmx->vcpu, 0);
@@ -1713,6 +1777,8 @@ static int vmx_vcpu_reset(struct kvm_vcpu *vcpu)
vmx_fpu_activate(&vmx->vcpu);
update_exception_bitmap(&vmx->vcpu);
+ vpid_sync_vcpu_all(vmx);
+
return 0;
out:
@@ -2221,10 +2287,6 @@ static int kvm_handle_exit(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
return 0;
}
-static void vmx_flush_tlb(struct kvm_vcpu *vcpu)
-{
-}
-
static void update_tpr_threshold(struct kvm_vcpu *vcpu)
{
int max_irr, tpr;
@@ -2489,6 +2551,10 @@ static void vmx_free_vcpu(struct kvm_vcpu *vcpu)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
+ spin_lock(&vmx_vpid_lock);
+ if (vmx->vpid != 0)
+ __clear_bit(vmx->vpid, vmx_vpid_bitmap);
+ spin_unlock(&vmx_vpid_lock);
vmx_free_vmcs(vcpu);
kfree(vmx->host_msrs);
kfree(vmx->guest_msrs);
@@ -2505,6 +2571,8 @@ static struct kvm_vcpu *vmx_create_vcpu(struct kvm *kvm, unsigned int id)
if (!vmx)
return ERR_PTR(-ENOMEM);
+ allocate_vpid(vmx);
+
err = kvm_vcpu_init(&vmx->vcpu, kvm, id);
if (err)
goto free_vcpu;
@@ -2652,6 +2720,8 @@ static int __init vmx_init(void)
memset(iova, 0xff, PAGE_SIZE);
kunmap(vmx_io_bitmap_b);
+ set_bit(0, vmx_vpid_bitmap); /* 0 is reserved for host */
+
r = kvm_init(&vmx_x86_ops, sizeof(struct vcpu_vmx), THIS_MODULE);
if (r)
goto out1;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-14 22:55:16 +0000