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KVM: VMX: Save/restore IRQs (instead of CLI/STI) during PI pre/post block

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Save/restore IRQs when disabling IRQs in posted interrupt pre/post block
in preparation for moving the code into vcpu_put/load(), where it would be
called with IRQs already disabled.

No functional changed intended.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20211009021236.4122790-26-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2021-10-08 19:12:18 -07:00 committed by Paolo Bonzini
parent 29802380b6
commit 89ef0f21cf
1 changed files with 7 additions and 6 deletions
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13
arch/x86/kvm/vmx/posted_intr.c
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@ -145,13 +145,13 @@ int pi_pre_block(struct kvm_vcpu *vcpu)
{
struct pi_desc old, new;
struct pi_desc *pi_desc = vcpu_to_pi_desc(vcpu);
unsigned long flags;
if (!vmx_can_use_vtd_pi(vcpu->kvm) ||
vmx_interrupt_blocked(vcpu))
return 0;
WARN_ON(irqs_disabled());
local_irq_disable();
local_irq_save(flags);
vcpu->pre_pcpu = vcpu->cpu;
spin_lock(&per_cpu(blocked_vcpu_on_cpu_lock, vcpu->cpu));
@ -175,19 +175,20 @@ int pi_pre_block(struct kvm_vcpu *vcpu)
if (pi_test_on(pi_desc))
__pi_post_block(vcpu);
local_irq_enable();
local_irq_restore(flags);
return (vcpu->pre_pcpu == -1);
}
void pi_post_block(struct kvm_vcpu *vcpu)
{
unsigned long flags;
if (vcpu->pre_pcpu == -1)
return;
WARN_ON(irqs_disabled());
local_irq_disable();
local_irq_save(flags);
__pi_post_block(vcpu);
local_irq_enable();
local_irq_restore(flags);
}
/*