RE: [PATCH V5 4/8] drivers: hv: Mark percpu hvcall input arg page unencrypted in SEV-SNP enlightened guest

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To: Tianyu Lan <ltykernel@xxxxxxxxx>, KY Srinivasan <kys@xxxxxxxxxxxxx>, Haiyang Zhang <haiyangz@xxxxxxxxxxxxx>, "wei.liu@xxxxxxxxxx" <wei.liu@xxxxxxxxxx>, "tglx@xxxxxxxxxxxxx" <tglx@xxxxxxxxxxxxx>, "mingo@xxxxxxxxxx" <mingo@xxxxxxxxxx>, "bp@xxxxxxxxx" <bp@xxxxxxxxx>, "dave.hansen@xxxxxxxxxxxxxxx" <dave.hansen@xxxxxxxxxxxxxxx>, "x86@xxxxxxxxxx" <x86@xxxxxxxxxx>, "hpa@xxxxxxxxx" <hpa@xxxxxxxxx>, "daniel.lezcano@xxxxxxxxxx" <daniel.lezcano@xxxxxxxxxx>, "arnd@xxxxxxxx" <arnd@xxxxxxxx>, "Michael Kelley (LINUX)" <mikelley@xxxxxxxxxxxxx>
Subject: RE: [PATCH V5 4/8] drivers: hv: Mark percpu hvcall input arg page unencrypted in SEV-SNP enlightened guest
From: Dexuan Cui <decui@xxxxxxxxxxxxx>
Date: Thu, 10 Aug 2023 23:15:27 +0000
Accept-language: en-US
Cc: Tianyu Lan <Tianyu.Lan@xxxxxxxxxxxxx>, "linux-arch@xxxxxxxxxxxxxxx" <linux-arch@xxxxxxxxxxxxxxx>, "linux-hyperv@xxxxxxxxxxxxxxx" <linux-hyperv@xxxxxxxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, vkuznets <vkuznets@xxxxxxxxxx>, "Michael Kelley (LINUX)" <mikelley@xxxxxxxxxxxxx>
In-reply-to: <20230810160412.820246-5-ltykernel@gmail.com>
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References: <20230810160412.820246-1-ltykernel@gmail.com> <20230810160412.820246-5-ltykernel@gmail.com>
Thread-index: AQHZy6RZfj8+SZAvtE6uKuux/tfw96/kKSng
Thread-topic: [PATCH V5 4/8] drivers: hv: Mark percpu hvcall input arg page unencrypted in SEV-SNP enlightened guest

> From: Tianyu Lan <ltykernel@xxxxxxxxx>
> Sent: Thursday, August 10, 2023 9:04 AM
>  [...]
> Hypervisor needs to access input arg, VMBus synic event and
> message pages. Mark these pages unencrypted in the SEV-SNP
> guest and free them only if they have been marked encrypted
> successfully.
> 
> Reviewed-by: Michael Kelley <mikelley@xxxxxxxxxxxxx>
> Signed-off-by: Tianyu Lan <tiala@xxxxxxxxxxxxx>

Reviewed-by: Dexuan Cui <decui@xxxxxxxxxxxxx>

References:
- [PATCH V5 0/8] x86/hyperv: Add AMD sev-snp enlightened guest support on hyperv
  - From: Tianyu Lan
- [PATCH V5 4/8] drivers: hv: Mark percpu hvcall input arg page unencrypted in SEV-SNP enlightened guest
  - From: Tianyu Lan

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