From: Nicholas Piggin <npiggin@gmail.com>
To: kvm-ppc@vger.kernel.org
Cc: linuxppc-dev@lists.ozlabs.org, Nicholas Piggin <npiggin@gmail.com>
Subject: [RFC PATCH 19/43] KVM: PPC: Book3S HV P9: Add kvmppc_stop_thread to match kvmppc_start_thread
Date: Tue, 22 Jun 2021 10:57:12 +0000 [thread overview]
Message-ID: <20210622105736.633352-20-npiggin@gmail.com> (raw)
In-Reply-To: <20210622105736.633352-1-npiggin@gmail.com>
Small cleanup makes it a bit easier to match up entry and exit
operations.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
arch/powerpc/kvm/book3s_hv.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index b8b0695a9312..86c85e303a6d 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -2948,6 +2948,13 @@ static void kvmppc_start_thread(struct kvm_vcpu *vcpu, struct kvmppc_vcore *vc)
kvmppc_ipi_thread(cpu);
}
+/* Old path does this in asm */
+static void kvmppc_stop_thread(struct kvm_vcpu *vcpu)
+{
+ vcpu->cpu = -1;
+ vcpu->arch.thread_cpu = -1;
+}
+
static void kvmppc_wait_for_nap(int n_threads)
{
int cpu = smp_processor_id();
@@ -4154,8 +4161,6 @@ static int kvmhv_p9_guest_entry(struct kvm_vcpu *vcpu, u64 time_limit,
dec = (s32) dec;
tb = mftb();
vcpu->arch.dec_expires = dec + tb;
- vcpu->cpu = -1;
- vcpu->arch.thread_cpu = -1;
store_spr_state(vcpu);
@@ -4627,6 +4632,8 @@ int kvmhv_run_single_vcpu(struct kvm_vcpu *vcpu, u64 time_limit,
guest_exit_irqoff();
+ kvmppc_stop_thread(vcpu);
+
powerpc_local_irq_pmu_restore(flags);
cpumask_clear_cpu(pcpu, &kvm->arch.cpu_in_guest);
--
2.23.0
next prev parent reply other threads:[~2021-06-22 10:57 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-22 10:56 [RFC PATCH 00/43] KVM: PPC: Book3S HV P9: entry/exit optimisations round 1 Nicholas Piggin
2021-06-22 10:56 ` [RFC PATCH 01/43] powerpc/64s: Remove WORT SPR from POWER9/10 Nicholas Piggin
2021-06-30 17:29 ` Fabiano Rosas
2021-06-22 10:56 ` [RFC PATCH 02/43] KMV: PPC: Book3S HV P9: Use set_dec to set decrementer to host Nicholas Piggin
2021-06-22 10:56 ` [RFC PATCH 03/43] KVM: PPC: Book3S HV P9: Use host timer accounting to avoid decrementer read Nicholas Piggin
2021-06-22 10:56 ` [RFC PATCH 04/43] KVM: PPC: Book3S HV P9: Use large decrementer for HDEC Nicholas Piggin
2021-06-22 10:56 ` [RFC PATCH 05/43] KVM: PPC: Book3S HV P9: Reduce mftb per guest entry/exit Nicholas Piggin
2021-06-22 10:56 ` [RFC PATCH 06/43] powerpc/time: add API for KVM to re-arm the host timer/decrementer Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 07/43] KVM: PPC: Book3S HV: POWER10 enable HAIL when running radix guests Nicholas Piggin
2021-06-30 19:41 ` Fabiano Rosas
2021-06-22 10:57 ` [RFC PATCH 08/43] powerpc/64s: Keep AMOR SPR a constant ~0 at runtime Nicholas Piggin
2021-06-30 19:17 ` Fabiano Rosas
2021-06-22 10:57 ` [RFC PATCH 09/43] KVM: PPC: Book3S HV: Don't always save PMU for guest capable of nesting Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 10/43] powerpc/64s: Always set PMU control registers to frozen/disabled when not in use Nicholas Piggin
2021-07-01 13:29 ` [RFC PATCH 10/43] powerpc/64s: Always set PMU control registers to frozen/disabled when not in u Madhavan Srinivasan
2021-07-02 0:27 ` Nicholas Piggin
2021-07-08 12:45 ` Nicholas Piggin
2021-07-12 3:54 ` Madhavan Srinivasan
2021-07-10 2:50 ` Athira Rajeev
2021-07-12 2:41 ` Nicholas Piggin
2021-07-14 12:39 ` Nicholas Piggin
2021-07-16 3:55 ` Madhavan Srinivasan
2021-06-22 10:57 ` [RFC PATCH 11/43] KVM: PPC: Book3S HV P9: Implement PMU save/restore in C Nicholas Piggin
2021-07-10 2:59 ` Athira Rajeev
2021-07-12 2:49 ` Nicholas Piggin
2021-07-12 14:19 ` Athira Rajeev
2021-06-22 10:57 ` [RFC PATCH 12/43] KVM: PPC: Book3S HV P9: Factor out yield_count increment Nicholas Piggin
2021-07-08 17:56 ` Fabiano Rosas
2021-06-22 10:57 ` [RFC PATCH 13/43] KVM: PPC: Book3S HV P9: Factor PMU save/load into context switch functions Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 14/43] KVM: PPC: Book3S HV P9: Demand fault PMU SPRs when marked not inuse Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 15/43] KVM: PPC: Book3S HV: CTRL SPR does not require read-modify-write Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 16/43] KVM: PPC: Book3S HV P9: Move SPRG restore to restore_p9_host_os_sprs Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 17/43] KVM: PPC: Book3S HV P9: Reduce mtmsrd instructions required to save host SPRs Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 18/43] KVM: PPC: Book3S HV P9: Improve mtmsrd scheduling by delaying MSR[EE] disable Nicholas Piggin
2021-06-22 10:57 ` Nicholas Piggin [this message]
2021-06-30 20:18 ` [RFC PATCH 19/43] KVM: PPC: Book3S HV P9: Add kvmppc_stop_thread to match kvmppc_start_thread Fabiano Rosas
2021-06-22 10:57 ` [RFC PATCH 20/43] KVM: PPC: Book3S HV: Change dec_expires to be relative to guest timebase Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 21/43] KVM: PPC: Book3S HV P9: Move TB updates Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 22/43] KVM: PPC: Book3S HV P9: Optimise timebase reads Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 23/43] KVM: PPC: Book3S HV P9: Avoid SPR scoreboard stalls Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 24/43] KVM: PPC: Book3S HV P9: Only execute mtSPR if the value changed Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 25/43] KVM: PPC: Book3S HV P9: Juggle SPR switching around Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 26/43] KVM: PPC: Book3S HV P9: Move vcpu register save/restore into functions Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 27/43] KVM: PPC: Book3S HV P9: Move host OS save/restore functions to built-in Nicholas Piggin
2021-07-08 5:44 ` Athira Rajeev
2021-07-12 2:50 ` Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 28/43] KVM: PPC: Book3S HV P9: Move nested guest entry into its own function Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 29/43] KVM: PPC: Book3S HV P9: Move remaining SPR and MSR access into low level entry Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 30/43] KVM: PPC: Book3S HV P9: Implement TM fastpath for guest entry/exit Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 31/43] KVM: PPC: Book3S HV P9: Switch PMU to guest as late as possible Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 32/43] KVM: PPC: Book3S HV P9: Restrict DSISR canary workaround to processors that requir Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 33/43] KVM: PPC: Book3S HV P9: More SPR speed improvements Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 34/43] KVM: PPC: Book3S HV P9: Demand fault EBB facility registers Nicholas Piggin
2021-07-08 17:46 ` Fabiano Rosas
2021-06-22 10:57 ` [RFC PATCH 35/43] KVM: PPC: Book3S HV P9: Demand fault TM " Nicholas Piggin
2021-07-08 17:46 ` Fabiano Rosas
2021-06-22 10:57 ` [RFC PATCH 36/43] KVM: PPC: Book3S HV P9: Use Linux SPR save/restore to manage some host SPRs Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 37/43] KVM: PPC: Book3S HV P9: Comment and fix MMU context switching code Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 38/43] KVM: PPC: Book3S HV P9: Test dawr_enabled() before saving host DAWR SPRs Nicholas Piggin
2021-06-30 17:51 ` Fabiano Rosas
2021-07-01 8:04 ` Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 39/43] KVM: PPC: Book3S HV P9: Don't restore PSSCR if not needed Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 40/43] KVM: PPC: Book3S HV P9: Avoid tlbsync sequence on radix guest exit Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 41/43] KVM: PPC: Book3S HV Nested: Avoid extra mftb() in nested entry Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 42/43] KVM: PPC: Book3S HV P9: Improve mfmsr performance on entry Nicholas Piggin
2021-06-22 10:57 ` [RFC PATCH 43/43] KVM: PPC: Book3S HV P9: Optimise hash guest SLB saving Nicholas Piggin
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