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Diffstat (limited to 'arch/x86/kvm/svm.c')
-rw-r--r--arch/x86/kvm/svm.c151
1 files changed, 82 insertions, 69 deletions
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 905ea6052517..4d8141e533c3 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -194,7 +194,6 @@ struct vcpu_svm {
unsigned int3_injected;
unsigned long int3_rip;
- u32 apf_reason;
/* cached guest cpuid flags for faster access */
bool nrips_enabled : 1;
@@ -277,6 +276,10 @@ static int avic;
module_param(avic, int, S_IRUGO);
#endif
+/* enable/disable Virtual VMLOAD VMSAVE */
+static int vls = true;
+module_param(vls, int, 0444);
+
/* AVIC VM ID bit masks and lock */
static DECLARE_BITMAP(avic_vm_id_bitmap, AVIC_VM_ID_NR);
static DEFINE_SPINLOCK(avic_vm_id_lock);
@@ -633,11 +636,13 @@ static void skip_emulated_instruction(struct kvm_vcpu *vcpu)
svm_set_interrupt_shadow(vcpu, 0);
}
-static void svm_queue_exception(struct kvm_vcpu *vcpu, unsigned nr,
- bool has_error_code, u32 error_code,
- bool reinject)
+static void svm_queue_exception(struct kvm_vcpu *vcpu)
{
struct vcpu_svm *svm = to_svm(vcpu);
+ unsigned nr = vcpu->arch.exception.nr;
+ bool has_error_code = vcpu->arch.exception.has_error_code;
+ bool reinject = vcpu->arch.exception.reinject;
+ u32 error_code = vcpu->arch.exception.error_code;
/*
* If we are within a nested VM we'd better #VMEXIT and let the guest
@@ -947,7 +952,7 @@ static void svm_enable_lbrv(struct vcpu_svm *svm)
{
u32 *msrpm = svm->msrpm;
- svm->vmcb->control.lbr_ctl = 1;
+ svm->vmcb->control.virt_ext |= LBR_CTL_ENABLE_MASK;
set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 1, 1);
set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 1, 1);
set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 1, 1);
@@ -958,7 +963,7 @@ static void svm_disable_lbrv(struct vcpu_svm *svm)
{
u32 *msrpm = svm->msrpm;
- svm->vmcb->control.lbr_ctl = 0;
+ svm->vmcb->control.virt_ext &= ~LBR_CTL_ENABLE_MASK;
set_msr_interception(msrpm, MSR_IA32_LASTBRANCHFROMIP, 0, 0);
set_msr_interception(msrpm, MSR_IA32_LASTBRANCHTOIP, 0, 0);
set_msr_interception(msrpm, MSR_IA32_LASTINTFROMIP, 0, 0);
@@ -1093,6 +1098,16 @@ static __init int svm_hardware_setup(void)
}
}
+ if (vls) {
+ if (!npt_enabled ||
+ !boot_cpu_has(X86_FEATURE_VIRTUAL_VMLOAD_VMSAVE) ||
+ !IS_ENABLED(CONFIG_X86_64)) {
+ vls = false;
+ } else {
+ pr_info("Virtual VMLOAD VMSAVE supported\n");
+ }
+ }
+
return 0;
err:
@@ -1280,6 +1295,16 @@ static void init_vmcb(struct vcpu_svm *svm)
if (avic)
avic_init_vmcb(svm);
+ /*
+ * If hardware supports Virtual VMLOAD VMSAVE then enable it
+ * in VMCB and clear intercepts to avoid #VMEXIT.
+ */
+ if (vls) {
+ clr_intercept(svm, INTERCEPT_VMLOAD);
+ clr_intercept(svm, INTERCEPT_VMSAVE);
+ svm->vmcb->control.virt_ext |= VIRTUAL_VMLOAD_VMSAVE_ENABLE_MASK;
+ }
+
mark_all_dirty(svm->vmcb);
enable_gif(svm);
@@ -2096,34 +2121,11 @@ static void svm_set_dr7(struct kvm_vcpu *vcpu, unsigned long value)
static int pf_interception(struct vcpu_svm *svm)
{
u64 fault_address = svm->vmcb->control.exit_info_2;
- u64 error_code;
- int r = 1;
+ u64 error_code = svm->vmcb->control.exit_info_1;
- switch (svm->apf_reason) {
- default:
- error_code = svm->vmcb->control.exit_info_1;
-
- trace_kvm_page_fault(fault_address, error_code);
- if (!npt_enabled && kvm_event_needs_reinjection(&svm->vcpu))
- kvm_mmu_unprotect_page_virt(&svm->vcpu, fault_address);
- r = kvm_mmu_page_fault(&svm->vcpu, fault_address, error_code,
+ return kvm_handle_page_fault(&svm->vcpu, error_code, fault_address,
svm->vmcb->control.insn_bytes,
- svm->vmcb->control.insn_len);
- break;
- case KVM_PV_REASON_PAGE_NOT_PRESENT:
- svm->apf_reason = 0;
- local_irq_disable();
- kvm_async_pf_task_wait(fault_address);
- local_irq_enable();
- break;
- case KVM_PV_REASON_PAGE_READY:
- svm->apf_reason = 0;
- local_irq_disable();
- kvm_async_pf_task_wake(fault_address);
- local_irq_enable();
- break;
- }
- return r;
+ svm->vmcb->control.insn_len, !npt_enabled);
}
static int db_interception(struct vcpu_svm *svm)
@@ -2267,7 +2269,7 @@ static int io_interception(struct vcpu_svm *svm)
{
struct kvm_vcpu *vcpu = &svm->vcpu;
u32 io_info = svm->vmcb->control.exit_info_1; /* address size bug? */
- int size, in, string;
+ int size, in, string, ret;
unsigned port;
++svm->vcpu.stat.io_exits;
@@ -2279,10 +2281,16 @@ static int io_interception(struct vcpu_svm *svm)
port = io_info >> 16;
size = (io_info & SVM_IOIO_SIZE_MASK) >> SVM_IOIO_SIZE_SHIFT;
svm->next_rip = svm->vmcb->control.exit_info_2;
- skip_emulated_instruction(&svm->vcpu);
+ ret = kvm_skip_emulated_instruction(&svm->vcpu);
- return in ? kvm_fast_pio_in(vcpu, size, port)
- : kvm_fast_pio_out(vcpu, size, port);
+ /*
+ * TODO: we might be squashing a KVM_GUESTDBG_SINGLESTEP-triggered
+ * KVM_EXIT_DEBUG here.
+ */
+ if (in)
+ return kvm_fast_pio_in(vcpu, size, port) && ret;
+ else
+ return kvm_fast_pio_out(vcpu, size, port) && ret;
}
static int nmi_interception(struct vcpu_svm *svm)
@@ -2415,15 +2423,19 @@ static int nested_svm_check_exception(struct vcpu_svm *svm, unsigned nr,
if (!is_guest_mode(&svm->vcpu))
return 0;
+ vmexit = nested_svm_intercept(svm);
+ if (vmexit != NESTED_EXIT_DONE)
+ return 0;
+
svm->vmcb->control.exit_code = SVM_EXIT_EXCP_BASE + nr;
svm->vmcb->control.exit_code_hi = 0;
svm->vmcb->control.exit_info_1 = error_code;
- svm->vmcb->control.exit_info_2 = svm->vcpu.arch.cr2;
-
- vmexit = nested_svm_intercept(svm);
- if (vmexit == NESTED_EXIT_DONE)
- svm->nested.exit_required = true;
+ if (svm->vcpu.arch.exception.nested_apf)
+ svm->vmcb->control.exit_info_2 = svm->vcpu.arch.apf.nested_apf_token;
+ else
+ svm->vmcb->control.exit_info_2 = svm->vcpu.arch.cr2;
+ svm->nested.exit_required = true;
return vmexit;
}
@@ -2598,7 +2610,7 @@ static int nested_svm_exit_special(struct vcpu_svm *svm)
break;
case SVM_EXIT_EXCP_BASE + PF_VECTOR:
/* When we're shadowing, trap PFs, but not async PF */
- if (!npt_enabled && svm->apf_reason == 0)
+ if (!npt_enabled && svm->vcpu.arch.apf.host_apf_reason == 0)
return NESTED_EXIT_HOST;
break;
default:
@@ -2645,7 +2657,7 @@ static int nested_svm_intercept(struct vcpu_svm *svm)
}
/* async page fault always cause vmexit */
else if ((exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR) &&
- svm->apf_reason != 0)
+ svm->vcpu.arch.exception.nested_apf != 0)
vmexit = NESTED_EXIT_DONE;
break;
}
@@ -2702,7 +2714,7 @@ static inline void copy_vmcb_control_area(struct vmcb *dst_vmcb, struct vmcb *fr
dst->event_inj = from->event_inj;
dst->event_inj_err = from->event_inj_err;
dst->nested_cr3 = from->nested_cr3;
- dst->lbr_ctl = from->lbr_ctl;
+ dst->virt_ext = from->virt_ext;
}
static int nested_svm_vmexit(struct vcpu_svm *svm)
@@ -3008,7 +3020,7 @@ static bool nested_svm_vmrun(struct vcpu_svm *svm)
/* We don't want to see VMMCALLs from a nested guest */
clr_intercept(svm, INTERCEPT_VMMCALL);
- svm->vmcb->control.lbr_ctl = nested_vmcb->control.lbr_ctl;
+ svm->vmcb->control.virt_ext = nested_vmcb->control.virt_ext;
svm->vmcb->control.int_vector = nested_vmcb->control.int_vector;
svm->vmcb->control.int_state = nested_vmcb->control.int_state;
svm->vmcb->control.tsc_offset += nested_vmcb->control.tsc_offset;
@@ -3055,6 +3067,7 @@ static int vmload_interception(struct vcpu_svm *svm)
{
struct vmcb *nested_vmcb;
struct page *page;
+ int ret;
if (nested_svm_check_permissions(svm))
return 1;
@@ -3064,18 +3077,19 @@ static int vmload_interception(struct vcpu_svm *svm)
return 1;
svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
- skip_emulated_instruction(&svm->vcpu);
+ ret = kvm_skip_emulated_instruction(&svm->vcpu);
nested_svm_vmloadsave(nested_vmcb, svm->vmcb);
nested_svm_unmap(page);
- return 1;
+ return ret;
}
static int vmsave_interception(struct vcpu_svm *svm)
{
struct vmcb *nested_vmcb;
struct page *page;
+ int ret;
if (nested_svm_check_permissions(svm))
return 1;
@@ -3085,12 +3099,12 @@ static int vmsave_interception(struct vcpu_svm *svm)
return 1;
svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
- skip_emulated_instruction(&svm->vcpu);
+ ret = kvm_skip_emulated_instruction(&svm->vcpu);
nested_svm_vmloadsave(svm->vmcb, nested_vmcb);
nested_svm_unmap(page);
- return 1;
+ return ret;
}
static int vmrun_interception(struct vcpu_svm *svm)
@@ -3123,25 +3137,29 @@ failed:
static int stgi_interception(struct vcpu_svm *svm)
{
+ int ret;
+
if (nested_svm_check_permissions(svm))
return 1;
svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
- skip_emulated_instruction(&svm->vcpu);
+ ret = kvm_skip_emulated_instruction(&svm->vcpu);
kvm_make_request(KVM_REQ_EVENT, &svm->vcpu);
enable_gif(svm);
- return 1;
+ return ret;
}
static int clgi_interception(struct vcpu_svm *svm)
{
+ int ret;
+
if (nested_svm_check_permissions(svm))
return 1;
svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
- skip_emulated_instruction(&svm->vcpu);
+ ret = kvm_skip_emulated_instruction(&svm->vcpu);
disable_gif(svm);
@@ -3152,7 +3170,7 @@ static int clgi_interception(struct vcpu_svm *svm)
mark_dirty(svm->vmcb, VMCB_INTR);
}
- return 1;
+ return ret;
}
static int invlpga_interception(struct vcpu_svm *svm)
@@ -3166,8 +3184,7 @@ static int invlpga_interception(struct vcpu_svm *svm)
kvm_mmu_invlpg(vcpu, kvm_register_read(&svm->vcpu, VCPU_REGS_RAX));
svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
- skip_emulated_instruction(&svm->vcpu);
- return 1;
+ return kvm_skip_emulated_instruction(&svm->vcpu);
}
static int skinit_interception(struct vcpu_svm *svm)
@@ -3190,7 +3207,7 @@ static int xsetbv_interception(struct vcpu_svm *svm)
if (kvm_set_xcr(&svm->vcpu, index, new_bv) == 0) {
svm->next_rip = kvm_rip_read(&svm->vcpu) + 3;
- skip_emulated_instruction(&svm->vcpu);
+ return kvm_skip_emulated_instruction(&svm->vcpu);
}
return 1;
@@ -3286,8 +3303,7 @@ static int invlpg_interception(struct vcpu_svm *svm)
return emulate_instruction(&svm->vcpu, 0) == EMULATE_DONE;
kvm_mmu_invlpg(&svm->vcpu, svm->vmcb->control.exit_info_1);
- skip_emulated_instruction(&svm->vcpu);
- return 1;
+ return kvm_skip_emulated_instruction(&svm->vcpu);
}
static int emulate_on_interception(struct vcpu_svm *svm)
@@ -3437,9 +3453,7 @@ static int dr_interception(struct vcpu_svm *svm)
kvm_register_write(&svm->vcpu, reg, val);
}
- skip_emulated_instruction(&svm->vcpu);
-
- return 1;
+ return kvm_skip_emulated_instruction(&svm->vcpu);
}
static int cr8_write_interception(struct vcpu_svm *svm)
@@ -3562,6 +3576,7 @@ static int rdmsr_interception(struct vcpu_svm *svm)
if (svm_get_msr(&svm->vcpu, &msr_info)) {
trace_kvm_msr_read_ex(ecx);
kvm_inject_gp(&svm->vcpu, 0);
+ return 1;
} else {
trace_kvm_msr_read(ecx, msr_info.data);
@@ -3570,9 +3585,8 @@ static int rdmsr_interception(struct vcpu_svm *svm)
kvm_register_write(&svm->vcpu, VCPU_REGS_RDX,
msr_info.data >> 32);
svm->next_rip = kvm_rip_read(&svm->vcpu) + 2;
- skip_emulated_instruction(&svm->vcpu);
+ return kvm_skip_emulated_instruction(&svm->vcpu);
}
- return 1;
}
static int svm_set_vm_cr(struct kvm_vcpu *vcpu, u64 data)
@@ -3698,11 +3712,11 @@ static int wrmsr_interception(struct vcpu_svm *svm)
if (kvm_set_msr(&svm->vcpu, &msr)) {
trace_kvm_msr_write_ex(ecx, data);
kvm_inject_gp(&svm->vcpu, 0);
+ return 1;
} else {
trace_kvm_msr_write(ecx, data);
- skip_emulated_instruction(&svm->vcpu);
+ return kvm_skip_emulated_instruction(&svm->vcpu);
}
- return 1;
}
static int msr_interception(struct vcpu_svm *svm)
@@ -3731,8 +3745,7 @@ static int pause_interception(struct vcpu_svm *svm)
static int nop_interception(struct vcpu_svm *svm)
{
- skip_emulated_instruction(&(svm->vcpu));
- return 1;
+ return kvm_skip_emulated_instruction(&(svm->vcpu));
}
static int monitor_interception(struct vcpu_svm *svm)
@@ -4117,7 +4130,7 @@ static void dump_vmcb(struct kvm_vcpu *vcpu)
pr_err("%-20s%016llx\n", "avic_vapic_bar:", control->avic_vapic_bar);
pr_err("%-20s%08x\n", "event_inj:", control->event_inj);
pr_err("%-20s%08x\n", "event_inj_err:", control->event_inj_err);
- pr_err("%-20s%lld\n", "lbr_ctl:", control->lbr_ctl);
+ pr_err("%-20s%lld\n", "virt_ext:", control->virt_ext);
pr_err("%-20s%016llx\n", "next_rip:", control->next_rip);
pr_err("%-20s%016llx\n", "avic_backing_page:", control->avic_backing_page);
pr_err("%-20s%016llx\n", "avic_logical_id:", control->avic_logical_id);
@@ -4965,7 +4978,7 @@ static void svm_vcpu_run(struct kvm_vcpu *vcpu)
/* if exit due to PF check for async PF */
if (svm->vmcb->control.exit_code == SVM_EXIT_EXCP_BASE + PF_VECTOR)
- svm->apf_reason = kvm_read_and_reset_pf_reason();
+ svm->vcpu.arch.apf.host_apf_reason = kvm_read_and_reset_pf_reason();
if (npt_enabled) {
vcpu->arch.regs_avail &= ~(1 << VCPU_EXREG_PDPTR);
generated by cgit v1.2.3 (git 2.39.1) at 2024-07-29 04:42:36 +0000