From: Vaibhav Jain <vaibhav@linux.ibm.com>
To: linuxppc-dev@lists.ozlabs.org, kvm@vger.kernel.org,
kvm-ppc@vger.kernel.org
Cc: mikey@neuling.org, sbhat@linux.ibm.com,
amachhiw@linux.vnet.ibm.com, Jordan Niethe <jniethe5@gmail.com>,
gautam@linux.ibm.com, Nicholas Piggin <npiggin@gmail.com>,
David.Laight@ACULAB.COM, kconsul@linux.vnet.ibm.com,
Vaibhav Jain <vaibhav@linux.ibm.com>,
Vaidyanathan Srinivasan <svaidy@linux.vnet.ibm.com>
Subject: [PATCH 07/12] KVM: PPC: Book3S HV nestedv2: Do not inject certain interrupts
Date: Fri, 1 Dec 2023 18:56:12 +0530 [thread overview]
Message-ID: <20231201132618.555031-8-vaibhav@linux.ibm.com> (raw)
In-Reply-To: <20231201132618.555031-1-vaibhav@linux.ibm.com>
From: Jordan Niethe <jniethe5@gmail.com>
There is no need to inject an external interrupt in
kvmppc_book3s_irqprio_deliver() as the test for BOOK3S_IRQPRIO_EXTERNAL
in kvmhv_run_single_vcpu() before guest entry will raise LPCR_MER if
needed. There is also no need to inject the decrementer interrupt as
this will be raised within the L2 if needed. Avoiding these injections
reduces H_GUEST_GET_STATE hcalls by the L1.
Suggested-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
---
arch/powerpc/kvm/book3s.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
index 6cd20ab9e94e..8acec144120e 100644
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -302,11 +302,11 @@ static int kvmppc_book3s_irqprio_deliver(struct kvm_vcpu *vcpu,
switch (priority) {
case BOOK3S_IRQPRIO_DECREMENTER:
- deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
+ deliver = !kvmhv_is_nestedv2() && (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
vec = BOOK3S_INTERRUPT_DECREMENTER;
break;
case BOOK3S_IRQPRIO_EXTERNAL:
- deliver = (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
+ deliver = !kvmhv_is_nestedv2() && (kvmppc_get_msr(vcpu) & MSR_EE) && !crit;
vec = BOOK3S_INTERRUPT_EXTERNAL;
break;
case BOOK3S_IRQPRIO_SYSTEM_RESET:
--
2.42.0
next prev parent reply other threads:[~2023-12-01 13:31 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-01 13:26 [PATCH 00/12] KVM: PPC: Nested APIv2 : Performance improvements Vaibhav Jain
2023-12-01 13:26 ` [PATCH 01/12] KVM: PPC: Book3S HV nestedv2: Invalidate RPT before deleting a guest Vaibhav Jain
2023-12-07 9:15 ` Aneesh Kumar K.V
2023-12-08 13:45 ` Vaibhav Jain
2023-12-15 16:12 ` Aneesh Kumar K.V
2023-12-18 4:54 ` Vaibhav Jain
2023-12-01 13:26 ` [PATCH 02/12] KVM: PPC: Book3S HV nestedv2: Avoid reloading the tb offset Vaibhav Jain
2023-12-01 13:26 ` [PATCH 03/12] KVM: PPC: Book3S HV nestedv2: Do not check msr on hcalls Vaibhav Jain
2023-12-01 13:26 ` [PATCH 04/12] KVM: PPC: Book3S HV nestedv2: Get the PID only if needed to copy tofrom a guest Vaibhav Jain
2023-12-01 13:26 ` [PATCH 05/12] KVM: PPC: Book3S HV nestedv2: Ensure LPCR_MER bit is passed to the L0 Vaibhav Jain
2023-12-01 13:26 ` [PATCH 06/12] KVM: PPC: Book3S HV: Handle pending exceptions on guest entry with MSR_EE Vaibhav Jain
2023-12-01 13:26 ` Vaibhav Jain [this message]
2023-12-01 13:26 ` [PATCH 08/12] KVM: PPC: Book3S HV nestedv2: Avoid msr check in kvmppc_handle_exit_hv() Vaibhav Jain
2023-12-01 13:26 ` [PATCH 09/12] KVM: PPC: Book3S HV nestedv2: Do not call H_COPY_TOFROM_GUEST Vaibhav Jain
2023-12-08 8:15 ` Aneesh Kumar K.V
2023-12-11 3:56 ` Vaibhav Jain
2023-12-11 4:01 ` Aneesh Kumar K.V
2023-12-18 7:02 ` Vaibhav Jain
2023-12-18 7:29 ` Aneesh Kumar K.V
2023-12-01 13:26 ` [PATCH 10/12] KVM: PPC: Book3S HV nestedv2: Register the VPA with the L0 Vaibhav Jain
2023-12-01 13:26 ` [PATCH 11/12] KVM: PPC: Reduce reliance on analyse_instr() in mmio emulation Vaibhav Jain
2023-12-01 13:26 ` [PATCH 12/12] KVM: PPC: Book3S HV nestedv2: Do not cancel pending decrementer exception Vaibhav Jain
2023-12-21 10:44 ` [PATCH 00/12] KVM: PPC: Nested APIv2 : Performance improvements Michael Ellerman
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