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Date: Wed, 17 Jan 2024 16:37:27 +0300
From: kirill.shutemov@linux.intel.com
To: mhklinux@outlook.com
Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
	dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com,
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	linux-kernel@vger.kernel.org, linux-coco@lists.linux.dev,
	linux-hyperv@vger.kernel.org, linux-mm@kvack.org
Subject: Re: [PATCH v4 1/3] x86/hyperv: Use slow_virt_to_phys() in page
 transition hypervisor callback
Message-ID: <20240117133727.3zzwifnunmgklotw@box.shutemov.name>
References: <20240116022008.1023398-1-mhklinux@outlook.com>
 <20240116022008.1023398-2-mhklinux@outlook.com>
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On Mon, Jan 15, 2024 at 06:20:06PM -0800, mhkelley58@gmail.com wrote:
> From: Michael Kelley <mhklinux@outlook.com>
> 
> In preparation for temporarily marking pages not present during a
> transition between encrypted and decrypted, use slow_virt_to_phys()
> in the hypervisor callback. As long as the PFN is correct,
> slow_virt_to_phys() works even if the leaf PTE is not present.
> The existing functions that depend on vmalloc_to_page() all
> require that the leaf PTE be marked present, so they don't work.
> 
> Update the comments for slow_virt_to_phys() to note this broader usage
> and the requirement to work even if the PTE is not marked present.
> 
> Signed-off-by: Michael Kelley <mhklinux@outlook.com>

Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>

-- 
  Kiryl Shutsemau / Kirill A. Shutemov