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[v6,05/48] KVM: PPC: Book3S HV: Remove redundant mtspr PSPB

Message ID	20210405011948.675354-6-npiggin@gmail.com
State	New
Headers	show Return-Path: <kvm-ppc-owner@vger.kernel.org> From: Nicholas Piggin <npiggin@gmail.com> To: kvm-ppc@vger.kernel.org Cc: Nicholas Piggin <npiggin@gmail.com>, linuxppc-dev@lists.ozlabs.org, Paul Mackerras <paulus@ozlabs.org>, Fabiano Rosas <farosas@linux.ibm.com>, Daniel Axtens <dja@axtens.net> Subject: [PATCH v6 05/48] KVM: PPC: Book3S HV: Remove redundant mtspr PSPB Date: Mon, 5 Apr 2021 11:19:05 +1000 Message-Id: <20210405011948.675354-6-npiggin@gmail.com> In-Reply-To: <20210405011948.675354-1-npiggin@gmail.com> References: <20210405011948.675354-1-npiggin@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk
Series	KVM: PPC: Book3S: C-ify the P9 entry/exit code \| expand [v6,00/48] KVM: PPC: Book3S: C-ify the P9 entry/exit code [v6,01/48] KVM: PPC: Book3S HV: Nested move LPCR sanitising to sanitise_hv_regs [v6,02/48] KVM: PPC: Book3S HV: Add a function to filter guest LPCR bits [v6,03/48] KVM: PPC: Book3S HV: Disallow LPCR[AIL] to be set to 1 or 2 [v6,04/48] KVM: PPC: Book3S HV: Prevent radix guests setting LPCR[TC] [v6,05/48] KVM: PPC: Book3S HV: Remove redundant mtspr PSPB [v6,06/48] KVM: PPC: Book3S HV: remove unused kvmppc_h_protect argument [v6,07/48] KVM: PPC: Book3S HV: Fix CONFIG_SPAPR_TCE_IOMMU=n default hcalls [v6,08/48] powerpc/64s: Remove KVM handler support from CBE_RAS interrupts [v6,09/48] powerpc/64s: remove KVM SKIP test from instruction breakpoint handler [v6,10/48] KVM: PPC: Book3S HV: Ensure MSR[ME] is always set in guest MSR [v6,11/48] KVM: PPC: Book3S HV: Ensure MSR[HV] is always clear in guest MSR [v6,12/48] KVM: PPC: Book3S 64: move KVM interrupt entry to a common entry point [v6,13/48] KVM: PPC: Book3S 64: Move GUEST_MODE_SKIP test into KVM [v6,14/48] KVM: PPC: Book3S 64: add hcall interrupt handler [v6,15/48] KVM: PPC: Book3S 64: Move hcall early register setup to KVM [v6,16/48] KVM: PPC: Book3S 64: Move interrupt early register setup to KVM [v6,17/48] KVM: PPC: Book3S 64: move bad_host_intr check to HV handler [v6,18/48] KVM: PPC: Book3S 64: Minimise hcall handler calling convention differences [v6,19/48] KVM: PPC: Book3S HV P9: Move radix MMU switching instructions together [v6,20/48] KVM: PPC: Book3S HV P9: implement kvmppc_xive_pull_vcpu in C [v6,21/48] KVM: PPC: Book3S HV P9: Move xive vcpu context management into kvmhv_p9_guest_entry [v6,22/48] KVM: PPC: Book3S HV P9: Stop handling hcalls in real-mode in the P9 path [v6,23/48] KVM: PPC: Book3S HV P9: Move setting HDEC after switching to guest LPCR [v6,24/48] KVM: PPC: Book3S HV P9: Use large decrementer for HDEC [v6,25/48] KVM: PPC: Book3S HV P9: Use host timer accounting to avoid decrementer read [v6,26/48] KVM: PPC: Book3S HV P9: Reduce mftb per guest entry/exit [v6,27/48] KVM: PPC: Book3S HV P9: Reduce irq_work vs guest decrementer races [v6,28/48] KMV: PPC: Book3S HV: Use set_dec to set decrementer to host [v6,29/48] powerpc/time: add API for KVM to re-arm the host timer/decrementer [v6,30/48] KVM: PPC: Book3S HV P9: Implement the rest of the P9 path in C [v6,31/48] KVM: PPC: Book3S HV P9: inline kvmhv_load_hv_regs_and_go into __kvmhv_vcpu_entry_p9 [v6,32/48] KVM: PPC: Book3S HV P9: Read machine check registers while MSR[RI] is 0 [v6,33/48] KVM: PPC: Book3S HV P9: Improve exit timing accounting coverage [v6,34/48] KVM: PPC: Book3S HV P9: Move SPR loading after expiry time check [v6,35/48] KVM: PPC: Book3S HV P9: Add helpers for OS SPR handling [v6,36/48] KVM: PPC: Book3S HV P9: Switch to guest MMU context as late as possible [v6,37/48] KVM: PPC: Book3S HV: Implement radix prefetch workaround by disabling MMU [v6,38/48] KVM: PPC: Book3S HV: Remove support for dependent threads mode on P9 [v6,39/48] KVM: PPC: Book3S HV: Remove radix guest support from P7/8 path [v6,40/48] KVM: PPC: Book3S HV: Remove virt mode checks from real mode handlers [v6,41/48] KVM: PPC: Book3S HV: Remove unused nested HV tests in XICS emulation [v6,42/48] KVM: PPC: Book3S HV P9: Allow all P9 processors to enable nested HV [v6,43/48] KVM: PPC: Book3S HV: small pseries_do_hcall cleanup [v6,44/48] KVM: PPC: Book3S HV: add virtual mode handlers for HPT hcalls and page faults [v6,45/48] KVM: PPC: Book3S HV P9: Reflect userspace hcalls to hash guests to support PR KVM [v6,46/48] KVM: PPC: Book3S HV P9: implement hash guest support [v6,47/48] KVM: PPC: Book3S HV P9: implement hash host / hash guest support [v6,48/48] KVM: PPC: Book3S HV: remove ISA v3.0 and v3.1 support from P7/8 path

Commit Message

Nicholas Piggin April 5, 2021, 1:19 a.m. UTC

This SPR is set to 0 twice when exiting the guest.

Acked-by: Paul Mackerras <paulus@ozlabs.org>
Suggested-by: Fabiano Rosas <farosas@linux.ibm.com>
Reviewed-by: Daniel Axtens <dja@axtens.net>
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
 arch/powerpc/kvm/book3s_hv.c | 1 -
 1 file changed, 1 deletion(-)

diff mbox series

Patch

diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index a6b5d79d9306..8bc2a5ee9ece 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -3787,7 +3787,6 @@  static int kvmhv_p9_guest_entry(struct kvm_vcpu *vcpu, u64 time_limit,
 	mtspr(SPRN_DSCR, host_dscr);
 	mtspr(SPRN_TIDR, host_tidr);
 	mtspr(SPRN_IAMR, host_iamr);
-	mtspr(SPRN_PSPB, 0);
 
 	if (host_amr != vcpu->arch.amr)
 		mtspr(SPRN_AMR, host_amr);