linux-kernel - Re: [PATCH] KVM: arm64: Use different pointer authentication keys for pKVM

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Date:   Tue, 13 Jun 2023 12:16:02 +0000
From:   Oliver Upton <oliver.upton@...ux.dev>
To:     Mostafa Saleh <smostafa@...gle.com>, kvmarm@...ts.linux.dev,
        maz@...nel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Cc:     Oliver Upton <oliver.upton@...ux.dev>, suzuki.poulose@....com,
        kaleshsingh@...gle.com, tabba@...gle.com, yuzenghui@...wei.com,
        catalin.marinas@....com, james.morse@....com, will@...nel.org
Subject: Re: [PATCH] KVM: arm64: Use different pointer authentication keys for pKVM

On Tue, 16 May 2023 14:15:31 +0000, Mostafa Saleh wrote:
> When the kernel is compiled with CONFIG_ARM64_PTR_AUTH_KERNEL, it
> uses Armv8.3-Pauth for return address protection for the kernel code
> including nvhe code in EL2.
> 
> Same keys are used in both kernel(EL1) and nvhe code(EL2), this is
> fine for nvhe but not when running in protected mode(pKVM) as the host
> can't be trusted.
> 
> [...]

Applied to kvmarm/next, thanks!

[1/1] KVM: arm64: Use different pointer authentication keys for pKVM
      https://git.kernel.org/kvmarm/kvmarm/c/fb737685beee

--
Best,
Oliver