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From: Alexandru Elisei <alexandru.elisei@arm.com>
To: Marc Zyngier <maz@kernel.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	 linux-arm-kernel@lists.infradead.org,
	kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org
Cc: kernel-team@android.com, Andre Przywara <andre.przywara@arm.com>,
	Dave Martin <Dave.Martin@arm.com>,
	George Cherian <gcherian@marvell.com>,
	"Zengtao \(B\)" <prime.zeng@hisilicon.com>,
	Will Deacon <will@kernel.org>
Subject: Re: [PATCH v3 08/17] KVM: arm64: sve: Use __vcpu_sys_reg() instead of raw sys_regs access
Date: Tue, 7 Jul 2020 13:58:37 +0100	[thread overview]
Message-ID: <e93ff2cc-c641-391e-ad31-fc4da7176bdf@arm.com> (raw)
In-Reply-To: <20200706125425.1671020-9-maz@kernel.org>

Hi,

On 7/6/20 1:54 PM, Marc Zyngier wrote:
> Now that we have a wrapper for the sysreg accesses, let's use that
> consistently.
>
> Signed-off-by: Marc Zyngier <maz@kernel.org>
> ---
>  arch/arm64/kvm/fpsimd.c | 4 +---
>  1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/arch/arm64/kvm/fpsimd.c b/arch/arm64/kvm/fpsimd.c
> index e329a36b2bee..e503caff14d1 100644
> --- a/arch/arm64/kvm/fpsimd.c
> +++ b/arch/arm64/kvm/fpsimd.c
> @@ -109,12 +109,10 @@ void kvm_arch_vcpu_put_fp(struct kvm_vcpu *vcpu)
>  	local_irq_save(flags);
>  
>  	if (vcpu->arch.flags & KVM_ARM64_FP_ENABLED) {
> -		u64 *guest_zcr = &vcpu->arch.ctxt.sys_regs[ZCR_EL1];
> -
>  		fpsimd_save_and_flush_cpu_state();
>  
>  		if (guest_has_sve)
> -			*guest_zcr = read_sysreg_s(SYS_ZCR_EL12);
> +			__vcpu_sys_reg(vcpu, ZCR_EL1) = read_sysreg_s(SYS_ZCR_EL12);
>  	} else if (host_has_sve) {
>  		/*
>  		 * The FPSIMD/SVE state in the CPU has not been touched, and we

Looks fine to me, it's a good change:

Reviewed-by: Alexandru Elisei <alexandru.elisei@arm.com>

Thanks,
Alex
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  reply	other threads:[~2020-07-07 12:58 UTC|newest]

Thread overview: 32+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-06 12:54 [PATCH v3 00/17] KVM: arm64: Preliminary NV patches Marc Zyngier
2020-07-06 12:54 ` [PATCH v3 01/17] KVM: arm64: Factor out stage 2 page table data from struct kvm Marc Zyngier
2020-07-06 12:54 ` [PATCH v3 02/17] arm64: Detect the ARMv8.4 TTL feature Marc Zyngier
2020-07-06 17:24   ` Catalin Marinas
2020-07-06 12:54 ` [PATCH v3 03/17] arm64: Document SW reserved PTE/PMD bits in Stage-2 descriptors Marc Zyngier
2020-07-06 17:25   ` Catalin Marinas
2020-07-06 12:54 ` [PATCH v3 04/17] arm64: Add level-hinted TLB invalidation helper Marc Zyngier
2020-07-06 17:24   ` Catalin Marinas
2020-07-06 12:54 ` [PATCH v3 05/17] KVM: arm64: Use TTL hint in when invalidating stage-2 translations Marc Zyngier
2020-07-06 12:54 ` [PATCH v3 06/17] KVM: arm64: Introduce accessor for ctxt->sys_reg Marc Zyngier
2020-07-06 12:54 ` [PATCH v3 07/17] KVM: arm64: hyp: Use ctxt_sys_reg/__vcpu_sys_reg instead of raw sys_regs access Marc Zyngier
2020-07-07 12:57   ` Alexandru Elisei
2020-07-06 12:54 ` [PATCH v3 08/17] KVM: arm64: sve: Use __vcpu_sys_reg() " Marc Zyngier
2020-07-07 12:58   ` Alexandru Elisei [this message]
2020-07-06 12:54 ` [PATCH v3 09/17] KVM: arm64: pauth: Use ctxt_sys_reg() " Marc Zyngier
2020-07-07 13:05   ` Alexandru Elisei
2020-07-06 12:54 ` [PATCH v3 10/17] KVM: arm64: debug: Drop useless vpcu parameter Marc Zyngier
2020-07-07 13:19   ` Alexandru Elisei
2020-07-06 12:54 ` [PATCH v3 11/17] KVM: arm64: Make struct kvm_regs userspace-only Marc Zyngier
2020-07-06 12:54 ` [PATCH v3 12/17] KVM: arm64: Move ELR_EL1 to the system register array Marc Zyngier
2020-07-06 12:54 ` [PATCH v3 13/17] KVM: arm64: Move SP_EL1 " Marc Zyngier
2020-07-06 12:54 ` [PATCH v3 14/17] KVM: arm64: Disintegrate SPSR array Marc Zyngier
2020-07-06 12:54 ` [PATCH v3 15/17] KVM: arm64: Move SPSR_EL1 to the system register array Marc Zyngier
2020-07-06 12:54 ` [PATCH v3 16/17] KVM: arm64: timers: Rename kvm_timer_sync_hwstate to kvm_timer_sync_user Marc Zyngier
2020-07-07 17:00   ` Alexandru Elisei
2020-07-06 12:54 ` [PATCH v3 17/17] KVM: arm64: timers: Move timer registers to the sys_regs file Marc Zyngier
2020-07-08 16:39   ` Alexandru Elisei
2020-07-06 17:27 ` [PATCH v3 00/17] KVM: arm64: Preliminary NV patches Catalin Marinas
2020-07-07  8:51   ` Marc Zyngier
2020-07-07 11:24 ` Alexandru Elisei
2020-07-07 11:48   ` Alexandru Elisei
2020-07-07 11:49   ` Marc Zyngier

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