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[v5,05/48] KVM: PPC: Book3S HV: Remove redundant mtspr PSPB

Message ID	20210401150325.442125-6-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 v5 05/48] KVM: PPC: Book3S HV: Remove redundant mtspr PSPB Date: Fri, 2 Apr 2021 01:02:42 +1000 Message-Id: <20210401150325.442125-6-npiggin@gmail.com> In-Reply-To: <20210401150325.442125-1-npiggin@gmail.com> References: <20210401150325.442125-1-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 [v5,00/48] KVM: PPC: Book3S: C-ify the P9 entry/exit code [v5,01/48] KVM: PPC: Book3S HV: Nested move LPCR sanitising to sanitise_hv_regs [v5,02/48] KVM: PPC: Book3S HV: Add a function to filter guest LPCR bits [v5,03/48] KVM: PPC: Book3S HV: Disallow LPCR[AIL] to be set to 1 or 2 [v5,04/48] KVM: PPC: Book3S HV: Prevent radix guests setting LPCR[TC] [v5,05/48] KVM: PPC: Book3S HV: Remove redundant mtspr PSPB [v5,06/48] KVM: PPC: Book3S HV: remove unused kvmppc_h_protect argument [v5,07/48] KVM: PPC: Book3S HV: Fix CONFIG_SPAPR_TCE_IOMMU=n default hcalls [v5,08/48] powerpc/64s: Remove KVM handler support from CBE_RAS interrupts [v5,09/48] powerpc/64s: remove KVM SKIP test from instruction breakpoint handler [v5,10/48] KVM: PPC: Book3S HV: Ensure MSR[ME] is always set in guest MSR [v5,11/48] KVM: PPC: Book3S HV: Ensure MSR[HV] is always clear in guest MSR [v5,12/48] KVM: PPC: Book3S 64: move KVM interrupt entry to a common entry point [v5,13/48] KVM: PPC: Book3S 64: Move GUEST_MODE_SKIP test into KVM [v5,14/48] KVM: PPC: Book3S 64: add hcall interrupt handler [v5,15/48] KVM: PPC: Book3S 64: Move hcall early register setup to KVM [v5,16/48] KVM: PPC: Book3S 64: Move interrupt early register setup to KVM [v5,17/48] KVM: PPC: Book3S 64: move bad_host_intr check to HV handler [v5,18/48] KVM: PPC: Book3S 64: Minimise hcall handler calling convention differences [v5,19/48] KVM: PPC: Book3S HV P9: Move radix MMU switching instructions together [v5,20/48] KVM: PPC: Book3S HV P9: implement kvmppc_xive_pull_vcpu in C [v5,21/48] KVM: PPC: Book3S HV P9: Move xive vcpu context management into kvmhv_p9_guest_entry [v5,22/48] KVM: PPC: Book3S HV P9: Stop handling hcalls in real-mode in the P9 path [v5,23/48] KVM: PPC: Book3S HV P9: Move setting HDEC after switching to guest LPCR [v5,24/48] KVM: PPC: Book3S HV P9: Use large decrementer for HDEC [v5,25/48] KVM: PPC: Book3S HV P9: Use host timer accounting to avoid decrementer read [v5,26/48] KVM: PPC: Book3S HV P9: Reduce mftb per guest entry/exit [v5,27/48] KVM: PPC: Book3S HV P9: Reduce irq_work vs guest decrementer races [v5,28/48] KMV: PPC: Book3S HV: Use set_dec to set decrementer to host [v5,29/48] powerpc: add set_dec_or_work API for safely updating decrementer [v5,30/48] KVM: PPC: Book3S HV P9: Implement the rest of the P9 path in C [v5,31/48] KVM: PPC: Book3S HV P9: inline kvmhv_load_hv_regs_and_go into __kvmhv_vcpu_entry_p9 [v5,32/48] KVM: PPC: Book3S HV P9: Read machine check registers while MSR[RI] is 0 [v5,33/48] KVM: PPC: Book3S HV P9: Improve exit timing accounting coverage [v5,34/48] KVM: PPC: Book3S HV P9: Move SPR loading after expiry time check [v5,35/48] KVM: PPC: Book3S HV P9: Add helpers for OS SPR handling [v5,36/48] KVM: PPC: Book3S HV P9: Switch to guest MMU context as late as possible [v5,37/48] KVM: PPC: Book3S HV: Implement radix prefetch workaround by disabling MMU [v5,38/48] KVM: PPC: Book3S HV: Remove support for dependent threads mode on P9 [v5,39/48] KVM: PPC: Book3S HV: Remove radix guest support from P7/8 path [v5,40/48] KVM: PPC: Book3S HV: Remove virt mode checks from real mode handlers [v5,41/48] KVM: PPC: Book3S HV: Remove unused nested HV tests in XICS emulation [v5,42/48] KVM: PPC: Book3S HV: Radix guests should not have userspace hcalls reflected to them [v5,43/48] KVM: PPC: Book3S HV P9: Allow all P9 processors to enable nested HV [v5,44/48] KVM: PPC: Book3S HV: small pseries_do_hcall cleanup [v5,45/48] KVM: PPC: Book3S HV: add virtual mode handlers for HPT hcalls and page faults [v5,46/48] KVM: PPC: Book3S HV P9: implement hash guest support [v5,47/48] KVM: PPC: Book3S HV P9: implement hash host / hash guest support [v5,48/48] KVM: PPC: Book3S HV: remove ISA v3.0 and v3.1 support from P7/8 path

Commit Message

Nicholas Piggin April 1, 2021, 3:02 p.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);