[12/15] KVM: arm64: Convert to the generic perf callbacks

Commit Message

Sean Christopherson Aug. 27, 2021, 12:57 a.m. UTC

Drop arm64's version of the callbacks in favor of the callbacks provided
by generic KVM, which are semantically identical.  Implement the "get ip"
hook as needed.

Signed-off-by: Sean Christopherson <[e-mail]>
---
 arch/arm64/include/asm/kvm_host.h |  6 +----
 arch/arm64/kvm/arm.c              |  5 ++++
 arch/arm64/kvm/perf.c             | 38 -------------------------------
 3 files changed, 6 insertions(+), 43 deletions(-)

Patch

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 007c38d77fd9..12e8d789e1ac 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -673,11 +673,7 @@  int io_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa);
 void kvm_perf_init(void);
 
 #ifdef CONFIG_PERF_EVENTS
-void kvm_register_perf_callbacks(void);
-static inline void kvm_unregister_perf_callbacks(void)
-{
-	__perf_unregister_guest_info_callbacks();
-}
+#define __KVM_WANT_PERF_CALLBACKS
 #else
 static inline void kvm_register_perf_callbacks(void) {}
 static inline void kvm_unregister_perf_callbacks(void) {}
diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c
index ec386971030d..dfc8078dd4f9 100644
--- a/arch/arm64/kvm/arm.c
+++ b/arch/arm64/kvm/arm.c
@@ -503,6 +503,11 @@  bool kvm_arch_vcpu_in_kernel(struct kvm_vcpu *vcpu)
 	return vcpu_mode_priv(vcpu);
 }
 
+unsigned long kvm_arch_vcpu_get_ip(struct kvm_vcpu *vcpu)
+{
+	return *vcpu_pc(vcpu);
+}
+
 /* Just ensure a guest exit from a particular CPU */
 static void exit_vm_noop(void *info)
 {
diff --git a/arch/arm64/kvm/perf.c b/arch/arm64/kvm/perf.c
index 2556b0a3b096..ad9fdc2f2f70 100644
--- a/arch/arm64/kvm/perf.c
+++ b/arch/arm64/kvm/perf.c
@@ -13,44 +13,6 @@ 
 
 DEFINE_STATIC_KEY_FALSE(kvm_arm_pmu_available);
 
-#ifdef CONFIG_PERF_EVENTS
-static int kvm_is_in_guest(void)
-{
-	return true;
-}
-
-static int kvm_is_user_mode(void)
-{
-	struct kvm_vcpu *vcpu = kvm_get_running_vcpu();
-
-	if (WARN_ON_ONCE(!vcpu))
-		return 0;
-
-	return !vcpu_mode_priv(vcpu);
-}
-
-static unsigned long kvm_get_guest_ip(void)
-{
-	struct kvm_vcpu *vcpu = kvm_get_running_vcpu();
-
-	if (WARN_ON_ONCE(!vcpu))
-		return 0;
-
-	return *vcpu_pc(vcpu);
-}
-
-static struct perf_guest_info_callbacks kvm_guest_cbs = {
-	.is_in_guest	= kvm_is_in_guest,
-	.is_user_mode	= kvm_is_user_mode,
-	.get_guest_ip	= kvm_get_guest_ip,
-};
-
-void kvm_register_perf_callbacks(void)
-{
-	__perf_register_guest_info_callbacks(&kvm_guest_cbs);
-}
-#endif /* CONFIG_PERF_EVENTS*/
-
 void kvm_perf_init(void)
 {
 	if (kvm_pmu_probe_pmuver() != 0xf && !is_protected_kvm_enabled())