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[v1,20/55] KVM: PPC: Book3S HV P9: Factor out yield_count increment

Message ID 20210726035036.739609-21-npiggin@gmail.com (mailing list archive)
State Superseded
Headers show
Series KVM: PPC: Book3S HV P9: entry/exit optimisations | expand
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Commit Message

Nicholas Piggin July 26, 2021, 3:50 a.m. UTC 
Factor duplicated code into a helper function.

Reviewed-by: Fabiano Rosas <farosas@linux.ibm.com>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
 arch/powerpc/kvm/book3s_hv.c | 24 ++++++++++++------------
 1 file changed, 12 insertions(+), 12 deletions(-)
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Patch

diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 7c75f63648d6..772f1e6c93e1 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -4081,6 +4081,16 @@  static inline bool hcall_is_xics(unsigned long req)
 		req == H_IPOLL || req == H_XIRR || req == H_XIRR_X;
 }
 
+static void vcpu_vpa_increment_dispatch(struct kvm_vcpu *vcpu)
+{
+	struct lppaca *lp = vcpu->arch.vpa.pinned_addr;
+	if (lp) {
+		u32 yield_count = be32_to_cpu(lp->yield_count) + 1;
+		lp->yield_count = cpu_to_be32(yield_count);
+		vcpu->arch.vpa.dirty = 1;
+	}
+}
+
 /*
  * Guest entry for POWER9 and later CPUs.
  */
@@ -4109,12 +4119,7 @@  static int kvmhv_p9_guest_entry(struct kvm_vcpu *vcpu, u64 time_limit,
 	vc->entry_exit_map = 1;
 	vc->in_guest = 1;
 
-	if (vcpu->arch.vpa.pinned_addr) {
-		struct lppaca *lp = vcpu->arch.vpa.pinned_addr;
-		u32 yield_count = be32_to_cpu(lp->yield_count) + 1;
-		lp->yield_count = cpu_to_be32(yield_count);
-		vcpu->arch.vpa.dirty = 1;
-	}
+	vcpu_vpa_increment_dispatch(vcpu);
 
 	if (cpu_has_feature(CPU_FTR_TM) ||
 	    cpu_has_feature(CPU_FTR_P9_TM_HV_ASSIST))
@@ -4242,12 +4247,7 @@  static int kvmhv_p9_guest_entry(struct kvm_vcpu *vcpu, u64 time_limit,
 	    cpu_has_feature(CPU_FTR_P9_TM_HV_ASSIST))
 		kvmppc_save_tm_hv(vcpu, vcpu->arch.shregs.msr, true);
 
-	if (vcpu->arch.vpa.pinned_addr) {
-		struct lppaca *lp = vcpu->arch.vpa.pinned_addr;
-		u32 yield_count = be32_to_cpu(lp->yield_count) + 1;
-		lp->yield_count = cpu_to_be32(yield_count);
-		vcpu->arch.vpa.dirty = 1;
-	}
+	vcpu_vpa_increment_dispatch(vcpu);
 
 	switch_pmu_to_host(vcpu, &host_os_sprs);