[PATCH v3 09/26] KVM: x86: Remove defunct pre_block/post_block kvm_x86_ops hooks

Sean Christopherson
2021-12-08T01:55:06Z

Drop kvm_x86_ops' pre/post_block() now that all implementations are nops.

No functional change intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
---
arch/x86/include/asm/kvm-x86-ops.h | 2 --
arch/x86/include/asm/kvm_host.h | 12 ------------
arch/x86/kvm/vmx/vmx.c | 13 -------------
arch/x86/kvm/x86.c | 6 +-----
4 files changed, 1 insertion(+), 32 deletions(-)

diff --git a/arch/x86/include/asm/kvm-x86-ops.h b/arch/x86/include/asm/kvm-x86-ops.h
index cefe1d81e2e8..c2b007171abd 100644
--- a/arch/x86/include/asm/kvm-x86-ops.h
+++ b/arch/x86/include/asm/kvm-x86-ops.h
@@ -96,8 +96,6 @@ KVM_X86_OP(handle_exit_irqoff)
KVM_X86_OP_NULL(request_immediate_exit)
KVM_X86_OP(sched_in)
KVM_X86_OP_NULL(update_cpu_dirty_logging)
-KVM_X86_OP_NULL(pre_block)
-KVM_X86_OP_NULL(post_block)
KVM_X86_OP_NULL(vcpu_blocking)
KVM_X86_OP_NULL(vcpu_unblocking)
KVM_X86_OP_NULL(update_pi_irte)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index e41ad1ead721..fb62ed94e52f 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1447,18 +1447,6 @@ struct kvm_x86_ops {
const struct kvm_pmu_ops *pmu_ops;
const struct kvm_x86_nested_ops *nested_ops;

- /*
- * Architecture specific hooks for vCPU blocking due to
- * HLT instruction.
- * Returns for .pre_block():
- * - 0 means continue to block the vCPU.
- * - 1 means we cannot block the vCPU since some event
- * happens during this period, such as, 'ON' bit in
- * posted-interrupts descriptor is set.
- */
- int (*pre_block)(struct kvm_vcpu *vcpu);
- void (*post_block)(struct kvm_vcpu *vcpu);
-
void (*vcpu_blocking)(struct kvm_vcpu *vcpu);
void (*vcpu_unblocking)(struct kvm_vcpu *vcpu);

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index a5ba9a069f5d..1b8804d93776 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -7442,16 +7442,6 @@ void vmx_update_cpu_dirty_logging(struct kvm_vcpu *vcpu)
secondary_exec_controls_clearbit(vmx, SECONDARY_EXEC_ENABLE_PML);
}

-static int vmx_pre_block(struct kvm_vcpu *vcpu)
-{
- return 0;
-}
-
-static void vmx_post_block(struct kvm_vcpu *vcpu)
-{
-
-}
-
static void vmx_setup_mce(struct kvm_vcpu *vcpu)
{
if (vcpu->arch.mcg_cap & MCG_LMCE_P)
@@ -7650,9 +7640,6 @@ static struct kvm_x86_ops vmx_x86_ops __initdata = {
.cpu_dirty_log_size = PML_ENTITY_NUM,
.update_cpu_dirty_logging = vmx_update_cpu_dirty_logging,

- .pre_block = vmx_pre_block,
- .post_block = vmx_post_block,
-
.pmu_ops = &intel_pmu_ops,
.nested_ops = &vmx_nested_ops,

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index f13a61830d9d..4a2341e4ff30 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -10043,8 +10043,7 @@ static inline int vcpu_block(struct kvm *kvm, struct kvm_vcpu *vcpu)
{
bool hv_timer;

- if (!kvm_arch_vcpu_runnable(vcpu) &&
- (!kvm_x86_ops.pre_block || static_call(kvm_x86_pre_block)(vcpu) == 0)) {
+ if (!kvm_arch_vcpu_runnable(vcpu)) {
/*
* Switch to the software timer before halt-polling/blocking as
* the guest's timer may be a break event for the vCPU, and the
@@ -10066,9 +10065,6 @@ static inline int vcpu_block(struct kvm *kvm, struct kvm_vcpu *vcpu)
if (hv_timer)
kvm_lapic_switch_to_hv_timer(vcpu);

- if (kvm_x86_ops.post_block)
- static_call(kvm_x86_post_block)(vcpu);
-
if (!kvm_check_request(KVM_REQ_UNHALT, vcpu))
return 1;
}
--
2.34.1.400.ga245620fadb-goog