Subject: [PATCH v5 21/48] KVM: PPC: Book3S HV P9: Move xive vcpu context management into kvmhv_p9_guest_entry

From: Nicholas Piggin <[email-masked]>
Date: Fri, 2 Apr 2021 01:02:58 +1000

Move the xive management up so the low level register switching can be
pushed further down in a later patch. XIVE MMIO CI operations can run in
higher level code with machine checks, tracing, etc., available.

Reviewed-by: Alexey Kardashevskiy <[email-masked]>
Signed-off-by: Nicholas Piggin <[email-masked]>
---
 arch/powerpc/kvm/book3s_hv.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 6ca47f26a397..2dc65d752f80 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -3598,15 +3598,11 @@ static int kvmhv_load_hv_regs_and_go(struct kvm_vcpu *vcpu, u64 time_limit,
 
 	switch_mmu_to_guest_radix(kvm, vcpu, lpcr);
 
-	kvmppc_xive_push_vcpu(vcpu);
-
 	mtspr(SPRN_SRR0, vcpu->arch.shregs.srr0);
 	mtspr(SPRN_SRR1, vcpu->arch.shregs.srr1);
 
 	trap = __kvmhv_vcpu_entry_p9(vcpu);
 
-	kvmppc_xive_pull_vcpu(vcpu);
-
 	/* Advance host PURR/SPURR by the amount used by guest */
 	purr = mfspr(SPRN_PURR);
 	spurr = mfspr(SPRN_SPURR);
@@ -3789,7 +3785,10 @@ static int kvmhv_p9_guest_entry(struct kvm_vcpu *vcpu, u64 time_limit,
 			trap = 0;
 		}
 	} else {
+		kvmppc_xive_push_vcpu(vcpu);
 		trap = kvmhv_load_hv_regs_and_go(vcpu, time_limit, lpcr);
+		kvmppc_xive_pull_vcpu(vcpu);
+
 	}
 
 	vcpu->arch.slb_max = 0;
-- 
2.23.0