From: "rick.p.edgecombe@linux.intel.com" <rick.p.edgecombe@linux.intel.com>
To: mhklinux@outlook.com, tglx@linutronix.de, mingo@redhat.com,
bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org,
hpa@zytor.com, kirill.shutemov@linux.intel.com,
haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com,
luto@kernel.org, peterz@infradead.org,
akpm@linux-foundation.org, urezki@gmail.com, hch@infradead.org,
lstoakes@gmail.com, thomas.lendacky@amd.com, ardb@kernel.org,
jroedel@suse.de, seanjc@google.com,
sathyanarayanan.kuppuswamy@linux.intel.com,
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
Date: Tue, 16 Jan 2024 09:02:29 -0800 [thread overview]
Message-ID: <ad55e4845edfd052538b5e80ae7ff2a67820424c.camel@linux.intel.com> (raw)
In-Reply-To: <20240116022008.1023398-2-mhklinux@outlook.com>
On Mon, 2024-01-15 at 18:20 -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>
Reviewed-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
next prev parent reply other threads:[~2024-01-16 17:02 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-16 2:20 [PATCH v4 0/3] x86/hyperv: Mark CoCo VM pages not present when changing encrypted state mhkelley58
2024-01-16 2:20 ` [PATCH v4 1/3] x86/hyperv: Use slow_virt_to_phys() in page transition hypervisor callback mhkelley58
2024-01-16 14:58 ` Edgecombe, Rick P
2024-01-16 17:02 ` rick.p.edgecombe [this message]
2024-01-17 13:37 ` kirill.shutemov
2024-01-16 2:20 ` [PATCH v4 2/3] x86/mm: Regularize set_memory_p() parameters and make non-static mhkelley58
2024-01-16 2:20 ` [PATCH v4 3/3] x86/hyperv: Make encrypted/decrypted changes safe for load_unaligned_zeropad() mhkelley58
2024-01-16 14:59 ` [PATCH v4 0/3] x86/hyperv: Mark CoCo VM pages not present when changing encrypted state Edgecombe, Rick P
2024-01-16 17:10 ` Rick Edgecombe
2024-02-09 15:51 ` Michael Kelley
2024-03-01 9:26 ` Wei Liu
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