This is a note to let you know that I've just added the patch titled
KVM: x86: optimize more exit handlers in vmx.c
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
kvm-x86-optimize-more-exit-handlers-in-vmx.c.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit ee16a936986468f7909687e3530a8912664707e2
Author: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Date: Mon Nov 4 17:59:58 2019 -0500
KVM: x86: optimize more exit handlers in vmx.c
[ Upstream commit f399e60c45f6b6e6ad6dfcedff1dd6386e086b0b ]
Eliminate wasteful call/ret non RETPOLINE case and unnecessary fentry
dynamic tracing hooking points.
Signed-off-by: Andrea Arcangeli <aarcange@xxxxxxxxxx>
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Stable-dep-of: 31de69f4eea7 ("KVM: nVMX: Properly expose ENABLE_USR_WAIT_PAUSE control to L1")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 52f024eeac3d..0fae9b448ab9 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -4802,7 +4802,7 @@ static int handle_exception_nmi(struct kvm_vcpu *vcpu)
return 0;
}
-static int handle_external_interrupt(struct kvm_vcpu *vcpu)
+static __always_inline int handle_external_interrupt(struct kvm_vcpu *vcpu)
{
++vcpu->stat.irq_exits;
return 1;
@@ -5074,21 +5074,6 @@ static void vmx_set_dr7(struct kvm_vcpu *vcpu, unsigned long val)
vmcs_writel(GUEST_DR7, val);
}
-static int handle_cpuid(struct kvm_vcpu *vcpu)
-{
- return kvm_emulate_cpuid(vcpu);
-}
-
-static int handle_rdmsr(struct kvm_vcpu *vcpu)
-{
- return kvm_emulate_rdmsr(vcpu);
-}
-
-static int handle_wrmsr(struct kvm_vcpu *vcpu)
-{
- return kvm_emulate_wrmsr(vcpu);
-}
-
static int handle_tpr_below_threshold(struct kvm_vcpu *vcpu)
{
kvm_apic_update_ppr(vcpu);
@@ -5105,11 +5090,6 @@ static int handle_interrupt_window(struct kvm_vcpu *vcpu)
return 1;
}
-static int handle_halt(struct kvm_vcpu *vcpu)
-{
- return kvm_emulate_halt(vcpu);
-}
-
static int handle_vmcall(struct kvm_vcpu *vcpu)
{
return kvm_emulate_hypercall(vcpu);
@@ -5657,11 +5637,11 @@ static int (*kvm_vmx_exit_handlers[])(struct kvm_vcpu *vcpu) = {
[EXIT_REASON_IO_INSTRUCTION] = handle_io,
[EXIT_REASON_CR_ACCESS] = handle_cr,
[EXIT_REASON_DR_ACCESS] = handle_dr,
- [EXIT_REASON_CPUID] = handle_cpuid,
- [EXIT_REASON_MSR_READ] = handle_rdmsr,
- [EXIT_REASON_MSR_WRITE] = handle_wrmsr,
+ [EXIT_REASON_CPUID] = kvm_emulate_cpuid,
+ [EXIT_REASON_MSR_READ] = kvm_emulate_rdmsr,
+ [EXIT_REASON_MSR_WRITE] = kvm_emulate_wrmsr,
[EXIT_REASON_PENDING_INTERRUPT] = handle_interrupt_window,
- [EXIT_REASON_HLT] = handle_halt,
+ [EXIT_REASON_HLT] = kvm_emulate_halt,
[EXIT_REASON_INVD] = handle_invd,
[EXIT_REASON_INVLPG] = handle_invlpg,
[EXIT_REASON_RDPMC] = handle_rdpmc,
