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Tue, 7 Jul 2020 06:18:48 -0700 (PDT) Received: from [192.168.0.110] (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 513D73F71E; Tue, 7 Jul 2020 06:18:46 -0700 (PDT) Subject: Re: [PATCH v3 10/17] KVM: arm64: debug: Drop useless vpcu parameter To: Marc Zyngier , Catalin Marinas , linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org References: <20200706125425.1671020-1-maz@kernel.org> <20200706125425.1671020-11-maz@kernel.org> From: Alexandru Elisei Message-ID: <9dc5698d-2782-c26e-156b-3d082fcfecf9@arm.com> Date: Tue, 7 Jul 2020 14:19:28 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20200706125425.1671020-11-maz@kernel.org> Content-Language: en-US Cc: kernel-team@android.com, Andre Przywara , Dave Martin , George Cherian , "Zengtao \(B\)" , Will Deacon X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu Hi Marc, On 7/6/20 1:54 PM, Marc Zyngier wrote: > As part of the ongoing spring cleanup, remove the now useless > vcpu parameter that is passed around (host and guest contexts > give us everything we need). > > Signed-off-by: Marc Zyngier > --- > arch/arm64/kvm/hyp/include/hyp/debug-sr.h | 18 ++++++++---------- > 1 file changed, 8 insertions(+), 10 deletions(-) > > diff --git a/arch/arm64/kvm/hyp/include/hyp/debug-sr.h b/arch/arm64/kvm/hyp/include/hyp/debug-sr.h > index 5499d6c1fd9f..0297dc63988c 100644 > --- a/arch/arm64/kvm/hyp/include/hyp/debug-sr.h > +++ b/arch/arm64/kvm/hyp/include/hyp/debug-sr.h > @@ -88,9 +88,8 @@ > default: write_debug(ptr[0], reg, 0); \ > } > > -static inline void __debug_save_state(struct kvm_vcpu *vcpu, > - struct kvm_guest_debug_arch *dbg, > - struct kvm_cpu_context *ctxt) > +static void __debug_save_state(struct kvm_guest_debug_arch *dbg, > + struct kvm_cpu_context *ctxt) > { > u64 aa64dfr0; > int brps, wrps; > @@ -107,9 +106,8 @@ static inline void __debug_save_state(struct kvm_vcpu *vcpu, > ctxt_sys_reg(ctxt, MDCCINT_EL1) = read_sysreg(mdccint_el1); > } > > -static inline void __debug_restore_state(struct kvm_vcpu *vcpu, > - struct kvm_guest_debug_arch *dbg, > - struct kvm_cpu_context *ctxt) > +static void __debug_restore_state(struct kvm_guest_debug_arch *dbg, > + struct kvm_cpu_context *ctxt) > { > u64 aa64dfr0; > int brps, wrps; > @@ -142,8 +140,8 @@ static inline void __debug_switch_to_guest_common(struct kvm_vcpu *vcpu) > host_dbg = &vcpu->arch.host_debug_state.regs; > guest_dbg = kern_hyp_va(vcpu->arch.debug_ptr); > > - __debug_save_state(vcpu, host_dbg, host_ctxt); > - __debug_restore_state(vcpu, guest_dbg, guest_ctxt); > + __debug_save_state(host_dbg, host_ctxt); > + __debug_restore_state(guest_dbg, guest_ctxt); > } > > static inline void __debug_switch_to_host_common(struct kvm_vcpu *vcpu) > @@ -161,8 +159,8 @@ static inline void __debug_switch_to_host_common(struct kvm_vcpu *vcpu) > host_dbg = &vcpu->arch.host_debug_state.regs; > guest_dbg = kern_hyp_va(vcpu->arch.debug_ptr); > > - __debug_save_state(vcpu, guest_dbg, guest_ctxt); > - __debug_restore_state(vcpu, host_dbg, host_ctxt); > + __debug_save_state(guest_dbg, guest_ctxt); > + __debug_restore_state(host_dbg, host_ctxt); > > vcpu->arch.flags &= ~KVM_ARM64_DEBUG_DIRTY; > } Looks fine to me. I also had a look at the other files where we started using the __vcpu_sys_reg/ctxt_sys_reg accessors, and I didn't find any functions where we could eliminate the vcpu parameter, like we did here: Reviewed-by: Alexandru Elisei Thanks, Alex _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm