linux-kernel - Re: [PATCH v8 41/43] KVM: arm64: Expose support for private memory

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Message-ID: <b1ac33d6-13ed-4870-aa60-36393516d593@redhat.com>
Date: Thu, 1 May 2025 13:04:19 +1000
From: Gavin Shan <gshan@...hat.com>
To: Steven Price <steven.price@....com>, kvm@...r.kernel.org,
 kvmarm@...ts.linux.dev
Cc: Catalin Marinas <catalin.marinas@....com>, Marc Zyngier <maz@...nel.org>,
 Will Deacon <will@...nel.org>, James Morse <james.morse@....com>,
 Oliver Upton <oliver.upton@...ux.dev>,
 Suzuki K Poulose <suzuki.poulose@....com>, Zenghui Yu
 <yuzenghui@...wei.com>, linux-arm-kernel@...ts.infradead.org,
 linux-kernel@...r.kernel.org, Joey Gouly <joey.gouly@....com>,
 Alexandru Elisei <alexandru.elisei@....com>,
 Christoffer Dall <christoffer.dall@....com>, Fuad Tabba <tabba@...gle.com>,
 linux-coco@...ts.linux.dev,
 Ganapatrao Kulkarni <gankulkarni@...amperecomputing.com>,
 Shanker Donthineni <sdonthineni@...dia.com>, Alper Gun
 <alpergun@...gle.com>, "Aneesh Kumar K . V" <aneesh.kumar@...nel.org>
Subject: Re: [PATCH v8 41/43] KVM: arm64: Expose support for private memory

On 4/16/25 11:42 PM, Steven Price wrote:
> Select KVM_GENERIC_PRIVATE_MEM and provide the necessary support
> functions.
> 
> Signed-off-by: Steven Price <steven.price@....com>
> ---
> Changes since v2:
>   * Switch kvm_arch_has_private_mem() to a macro to avoid overhead of a
>     function call.
>   * Guard definitions of kvm_arch_{pre,post}_set_memory_attributes() with
>     #ifdef CONFIG_KVM_GENERIC_MEMORY_ATTRIBUTES.
>   * Early out in kvm_arch_post_set_memory_attributes() if the WARN_ON
>     should trigger.
> ---
>   arch/arm64/include/asm/kvm_host.h |  6 ++++++
>   arch/arm64/kvm/Kconfig            |  1 +
>   arch/arm64/kvm/mmu.c              | 24 ++++++++++++++++++++++++
>   3 files changed, 31 insertions(+)
> 

Reviewed-by: Gavin Shan <gshan@...hat.com>