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From: Andrew Jones <drjones@redhat.com>
To: Fuad Tabba <tabba@google.com>
Cc: kvmarm@lists.cs.columbia.edu, maz@kernel.org, will@kernel.org,
	james.morse@arm.com, alexandru.elisei@arm.com,
	suzuki.poulose@arm.com, mark.rutland@arm.com,
	christoffer.dall@arm.com, pbonzini@redhat.com, oupton@google.com,
	qperret@google.com, kvm@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org, kernel-team@android.com
Subject: Re: [PATCH v5 2/8] KVM: arm64: Add missing field descriptor for MDCR_EL2
Date: Wed, 8 Sep 2021 14:38:37 +0200	[thread overview]
Message-ID: <20210908123837.exyhsn6t2c7nmbox@gator> (raw)
In-Reply-To: <20210827101609.2808181-3-tabba@google.com>

On Fri, Aug 27, 2021 at 11:16:03AM +0100, Fuad Tabba wrote:
> It's not currently used. Added for completeness.
> 
> No functional change intended.
> 
> Suggested-by: Marc Zyngier <maz@kernel.org>
> Signed-off-by: Fuad Tabba <tabba@google.com>
> ---
>  arch/arm64/include/asm/kvm_arm.h | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h
> index 327120c0089f..a39fcf318c77 100644
> --- a/arch/arm64/include/asm/kvm_arm.h
> +++ b/arch/arm64/include/asm/kvm_arm.h
> @@ -295,6 +295,7 @@
>  #define MDCR_EL2_HPMFZO		(UL(1) << 29)
>  #define MDCR_EL2_MTPME		(UL(1) << 28)
>  #define MDCR_EL2_TDCC		(UL(1) << 27)
> +#define MDCR_EL2_HLP		(UL(1) << 26)
>  #define MDCR_EL2_HCCD		(UL(1) << 23)
>  #define MDCR_EL2_TTRF		(UL(1) << 19)
>  #define MDCR_EL2_HPMD		(UL(1) << 17)
> -- 
> 2.33.0.259.gc128427fd7-goog
>

If we're proactively adding bits per the most recent spec, then I guess we
could also add HPMFZS (bit 36). Otherwise,

Reviewed-by: Andrew Jones <drjones@redhat.com>


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  reply	other threads:[~2021-09-08 12:40 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-27 10:16 [PATCH v5 0/8] KVM: arm64: Fixed features for protected VMs Fuad Tabba
2021-08-27 10:16 ` [PATCH v5 1/8] KVM: arm64: Pass struct kvm to per-EC handlers Fuad Tabba
2021-09-08 12:33   ` Andrew Jones
2021-09-20 13:15   ` Marc Zyngier
2021-09-20 14:08     ` Fuad Tabba
2021-08-27 10:16 ` [PATCH v5 2/8] KVM: arm64: Add missing field descriptor for MDCR_EL2 Fuad Tabba
2021-09-08 12:38   ` Andrew Jones [this message]
2021-09-22  9:34     ` Fuad Tabba
2021-08-27 10:16 ` [PATCH v5 3/8] KVM: arm64: Simplify masking out MTE in feature id reg Fuad Tabba
2021-09-08 12:38   ` Andrew Jones
2021-08-27 10:16 ` [PATCH v5 4/8] KVM: arm64: Add trap handlers for protected VMs Fuad Tabba
2021-09-08 12:20   ` Andrew Jones
2021-09-22  9:46     ` Fuad Tabba
2021-08-27 10:16 ` [PATCH v5 5/8] KVM: arm64: Initialize trap registers " Fuad Tabba
2021-08-27 10:16 ` [PATCH v5 6/8] KVM: arm64: Move sanitized copies of CPU features Fuad Tabba
2021-08-27 10:16 ` [PATCH v5 7/8] KVM: arm64: Trap access to pVM restricted features Fuad Tabba
2021-08-27 10:16 ` [PATCH v5 8/8] KVM: arm64: Handle protected guests at 32 bits Fuad Tabba

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