Rename and invert kvm_vcpu_latch_init() to kvm_apic_init_sipi_allowed()
so as to match the behavior of {interrupt,nmi,smi}_allowed(), and expose
the helper so that it can be used by kvm_vcpu_has_events() to determine
whether or not an INIT or SIPI is pending _and_ can be taken immediately.
Opportunistically replaced usage of the "latch" terminology with "blocked"
and/or "allowed", again to align with KVM's terminology used for all other
event types.
No functional change intended.
Signed-off-by: Sean Christopherson <sea...@google.com>
---
arch/x86/kvm/lapic.c | 4 ++--
arch/x86/kvm/lapic.h | 7 +++++++
arch/x86/kvm/x86.c | 9 +++++----
arch/x86/kvm/x86.h | 5 -----
4 files changed, 14 insertions(+), 11 deletions(-)
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 9dda989a1cf0..2bd90effc653 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -3051,14 +3051,14 @@ int kvm_apic_accept_events(struct kvm_vcpu *vcpu)
}
/*
- * INITs are latched while CPU is in specific states
+ * INITs are blocked while CPU is in specific states
* (SMM, VMX root mode, SVM with GIF=0).
* Because a CPU cannot be in these states immediately
* after it has processed an INIT signal (and thus in
* KVM_MP_STATE_INIT_RECEIVED state), just eat SIPIs
* and leave the INIT pending.
*/
- if (kvm_vcpu_latch_init(vcpu)) {
+ if (!kvm_apic_init_sipi_allowed(vcpu)) {
WARN_ON_ONCE(vcpu->arch.mp_state == KVM_MP_STATE_INIT_RECEIVED);
if (test_bit(KVM_APIC_SIPI, &pe))
clear_bit(KVM_APIC_SIPI, &apic->pending_events);
diff --git a/arch/x86/kvm/lapic.h b/arch/x86/kvm/lapic.h
index 117a46df5cc1..c3ce6b0b1ea3 100644
--- a/arch/x86/kvm/lapic.h
+++ b/arch/x86/kvm/lapic.h
@@ -7,6 +7,7 @@
#include <linux/kvm_host.h>
#include "hyperv.h"
+#include "kvm_cache_regs.h"
#define KVM_APIC_INIT 0
#define KVM_APIC_SIPI 1
@@ -228,6 +229,12 @@ static inline bool kvm_apic_has_events(struct kvm_vcpu
*vcpu)
return lapic_in_kernel(vcpu) && vcpu->arch.apic->pending_events;
}
+static inline bool kvm_apic_init_sipi_allowed(struct kvm_vcpu *vcpu)
+{
+ return !is_smm(vcpu) &&
+ !static_call(kvm_x86_apic_init_signal_blocked)(vcpu);
+}
+
static inline bool kvm_lowest_prio_delivery(struct kvm_lapic_irq *irq)
{
return (irq->delivery_mode == APIC_DM_LOWEST ||
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index e1a25e46dbf7..59be7b16b92f 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -11293,11 +11293,12 @@ int kvm_arch_vcpu_ioctl_set_mpstate(struct kvm_vcpu
*vcpu,
goto out;
/*
- * KVM_MP_STATE_INIT_RECEIVED means the processor is in
- * INIT state; latched init should be reported using
- * KVM_SET_VCPU_EVENTS, so reject it here.
+ * Pending INITs are reported using KVM_SET_VCPU_EVENTS, disallow
+ * forcing the guest into INIT/SIPI if those events are supposed to be
+ * blocked. KVM prioritizes SMI over INIT, so reject INIT/SIPI state
+ * if an SMI is pending as well.
*/
- if ((kvm_vcpu_latch_init(vcpu) || vcpu->arch.smi_pending) &&
+ if ((!kvm_apic_init_sipi_allowed(vcpu) || vcpu->arch.smi_pending) &&
(mp_state->mp_state == KVM_MP_STATE_SIPI_RECEIVED ||
mp_state->mp_state == KVM_MP_STATE_INIT_RECEIVED))
goto out;
diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h
index a784ff90740b..829d3134c1eb 100644
--- a/arch/x86/kvm/x86.h
+++ b/arch/x86/kvm/x86.h
@@ -275,11 +275,6 @@ static inline bool kvm_check_has_quirk(struct kvm *kvm,
u64 quirk)
return !(kvm->arch.disabled_quirks & quirk);
}
-static inline bool kvm_vcpu_latch_init(struct kvm_vcpu *vcpu)
-{
- return is_smm(vcpu) ||
static_call(kvm_x86_apic_init_signal_blocked)(vcpu);
-}
-
void kvm_inject_realmode_interrupt(struct kvm_vcpu *vcpu, int irq, int
inc_eip);
u64 get_kvmclock_ns(struct kvm *kvm);
--
2.37.3.968.ga6b4b080e4-goog
