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Diffstat (limited to 'arch/x86/kvm/x86.c')
-rw-r--r--arch/x86/kvm/x86.c60
1 files changed, 37 insertions, 23 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 547ba00ef64f..a6ab19afc638 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -9111,7 +9111,7 @@ static void kvm_apicv_init(struct kvm *kvm)
if (!enable_apicv)
set_or_clear_apicv_inhibit(inhibits,
- APICV_INHIBIT_REASON_ABSENT, true);
+ APICV_INHIBIT_REASON_DISABLE, true);
}
static void kvm_sched_yield(struct kvm_vcpu *vcpu, unsigned long dest_id)
@@ -9889,6 +9889,11 @@ void kvm_arch_mmu_notifier_invalidate_range(struct kvm *kvm,
kvm_make_all_cpus_request(kvm, KVM_REQ_APIC_PAGE_RELOAD);
}
+void kvm_arch_guest_memory_reclaimed(struct kvm *kvm)
+{
+ static_call_cond(kvm_x86_guest_memory_reclaimed)(kvm);
+}
+
static void kvm_vcpu_reload_apic_access_page(struct kvm_vcpu *vcpu)
{
if (!lapic_in_kernel(vcpu))
@@ -10097,7 +10102,7 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
/* Store vcpu->apicv_active before vcpu->mode. */
smp_store_release(&vcpu->mode, IN_GUEST_MODE);
- srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
+ kvm_vcpu_srcu_read_unlock(vcpu);
/*
* 1) We should set ->mode before checking ->requests. Please see
@@ -10128,7 +10133,7 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
smp_wmb();
local_irq_enable();
preempt_enable();
- vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
+ kvm_vcpu_srcu_read_lock(vcpu);
r = 1;
goto cancel_injection;
}
@@ -10254,7 +10259,7 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
local_irq_enable();
preempt_enable();
- vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
+ kvm_vcpu_srcu_read_lock(vcpu);
/*
* Profile KVM exit RIPs:
@@ -10284,7 +10289,7 @@ out:
}
/* Called within kvm->srcu read side. */
-static inline int vcpu_block(struct kvm *kvm, struct kvm_vcpu *vcpu)
+static inline int vcpu_block(struct kvm_vcpu *vcpu)
{
bool hv_timer;
@@ -10300,12 +10305,12 @@ static inline int vcpu_block(struct kvm *kvm, struct kvm_vcpu *vcpu)
if (hv_timer)
kvm_lapic_switch_to_sw_timer(vcpu);
- srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
+ kvm_vcpu_srcu_read_unlock(vcpu);
if (vcpu->arch.mp_state == KVM_MP_STATE_HALTED)
kvm_vcpu_halt(vcpu);
else
kvm_vcpu_block(vcpu);
- vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
+ kvm_vcpu_srcu_read_lock(vcpu);
if (hv_timer)
kvm_lapic_switch_to_hv_timer(vcpu);
@@ -10347,7 +10352,6 @@ static inline bool kvm_vcpu_running(struct kvm_vcpu *vcpu)
static int vcpu_run(struct kvm_vcpu *vcpu)
{
int r;
- struct kvm *kvm = vcpu->kvm;
vcpu->arch.l1tf_flush_l1d = true;
@@ -10355,7 +10359,7 @@ static int vcpu_run(struct kvm_vcpu *vcpu)
if (kvm_vcpu_running(vcpu)) {
r = vcpu_enter_guest(vcpu);
} else {
- r = vcpu_block(kvm, vcpu);
+ r = vcpu_block(vcpu);
}
if (r <= 0)
@@ -10374,9 +10378,9 @@ static int vcpu_run(struct kvm_vcpu *vcpu)
}
if (__xfer_to_guest_mode_work_pending()) {
- srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
+ kvm_vcpu_srcu_read_unlock(vcpu);
r = xfer_to_guest_mode_handle_work(vcpu);
- vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
+ kvm_vcpu_srcu_read_lock(vcpu);
if (r)
return r;
}
@@ -10387,12 +10391,7 @@ static int vcpu_run(struct kvm_vcpu *vcpu)
static inline int complete_emulated_io(struct kvm_vcpu *vcpu)
{
- int r;
-
- vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
- r = kvm_emulate_instruction(vcpu, EMULTYPE_NO_DECODE);
- srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx);
- return r;
+ return kvm_emulate_instruction(vcpu, EMULTYPE_NO_DECODE);
}
static int complete_emulated_pio(struct kvm_vcpu *vcpu)
@@ -10484,7 +10483,6 @@ static void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu)
{
struct kvm_run *kvm_run = vcpu->run;
- struct kvm *kvm = vcpu->kvm;
int r;
vcpu_load(vcpu);
@@ -10492,7 +10490,7 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu)
kvm_run->flags = 0;
kvm_load_guest_fpu(vcpu);
- vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu);
+ kvm_vcpu_srcu_read_lock(vcpu);
if (unlikely(vcpu->arch.mp_state == KVM_MP_STATE_UNINITIALIZED)) {
if (kvm_run->immediate_exit) {
r = -EINTR;
@@ -10504,9 +10502,9 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu)
*/
WARN_ON_ONCE(kvm_lapic_hv_timer_in_use(vcpu));
- srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
+ kvm_vcpu_srcu_read_unlock(vcpu);
kvm_vcpu_block(vcpu);
- vcpu->srcu_idx = srcu_read_lock(&kvm->srcu);
+ kvm_vcpu_srcu_read_lock(vcpu);
if (kvm_apic_accept_events(vcpu) < 0) {
r = 0;
@@ -10567,7 +10565,7 @@ out:
if (kvm_run->kvm_valid_regs)
store_regs(vcpu);
post_kvm_run_save(vcpu);
- srcu_read_unlock(&kvm->srcu, vcpu->srcu_idx);
+ kvm_vcpu_srcu_read_unlock(vcpu);
kvm_sigset_deactivate(vcpu);
vcpu_put(vcpu);
@@ -10985,6 +10983,9 @@ static void kvm_arch_vcpu_guestdbg_update_apicv_inhibit(struct kvm *kvm)
struct kvm_vcpu *vcpu;
unsigned long i;
+ if (!enable_apicv)
+ return;
+
down_write(&kvm->arch.apicv_update_lock);
kvm_for_each_vcpu(i, vcpu, kvm) {
@@ -11196,8 +11197,21 @@ int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
r = kvm_create_lapic(vcpu, lapic_timer_advance_ns);
if (r < 0)
goto fail_mmu_destroy;
- if (kvm_apicv_activated(vcpu->kvm))
+
+ /*
+ * Defer evaluating inhibits until the vCPU is first run, as
+ * this vCPU will not get notified of any changes until this
+ * vCPU is visible to other vCPUs (marked online and added to
+ * the set of vCPUs). Opportunistically mark APICv active as
+ * VMX in particularly is highly unlikely to have inhibits.
+ * Ignore the current per-VM APICv state so that vCPU creation
+ * is guaranteed to run with a deterministic value, the request
+ * will ensure the vCPU gets the correct state before VM-Entry.
+ */
+ if (enable_apicv) {
vcpu->arch.apicv_active = true;
+ kvm_make_request(KVM_REQ_APICV_UPDATE, vcpu);
+ }
} else
static_branch_inc(&kvm_has_noapic_vcpu);
generated by cgit v1.2.3-70-g09d2 (git 2.47.1) at 2025-01-16 02:14:29 +0000