From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To: Dave Hansen <dave.hansen@intel.com>
Cc: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
luto@kernel.org, peterz@infradead.org, ak@linux.intel.com,
dan.j.williams@intel.com, david@redhat.com, hpa@zytor.com,
linux-kernel@vger.kernel.org,
sathyanarayanan.kuppuswamy@linux.intel.com, seanjc@google.com,
thomas.lendacky@amd.com, x86@kernel.org
Subject: Re: [PATCHv4 3/3] x86/tdx: Handle load_unaligned_zeropad() page-cross to a shared page
Date: Thu, 16 Jun 2022 02:16:15 +0300 [thread overview]
Message-ID: <20220615231615.w57gatnfc2c55cvs@black.fi.intel.com> (raw)
In-Reply-To: <184456a7-fd03-c3c6-3d4f-4f770e2e8b31@intel.com>
On Wed, Jun 15, 2022 at 03:36:02PM -0700, Dave Hansen wrote:
> On 6/15/22 15:32, Kirill A. Shutemov wrote:
> >>> /*
> >>> * Reject EPT violation #VEs that split pages.
> >>> *
> >>> * MMIO accesses are supposed to be naturally aligned and therefore
> >>> * never cross page boundaries. Seeing split page accesses indicates
> >>> * a bug or a load_unaligned_zeropad() that stepped into an MMIO page.
> >>> *
> >>> * load_unaligned_zeropad() will recover using exception fixups.
> >>> */
> > Looks good, thanks.
>
> I've got that snippet and a few other things staged here:
>
> > https://git.kernel.org/pub/scm/linux/kernel/git/daveh/devel.git/log/?h=testme
>
> Could you take a quick look through before I push them somewhere for real?
Looks good to me. Could you fold in the off-by-one fix?
--
Kirill A. Shutemov
next prev parent reply other threads:[~2022-06-15 23:16 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-14 12:01 [PATCHv4 0/3] An updated version of the load_unaligned_zeropad() fix Kirill A. Shutemov
2022-06-14 12:01 ` [PATCHv4 1/3] x86/tdx: Fix early #VE handling Kirill A. Shutemov
2022-06-17 21:53 ` [tip: x86/urgent] " tip-bot2 for Kirill A. Shutemov
2022-06-14 12:01 ` [PATCHv4 2/3] x86/tdx: Clarify RIP adjustments in #VE handler Kirill A. Shutemov
2022-06-17 21:53 ` [tip: x86/urgent] " tip-bot2 for Kirill A. Shutemov
2022-06-14 12:01 ` [PATCHv4 3/3] x86/tdx: Handle load_unaligned_zeropad() page-cross to a shared page Kirill A. Shutemov
2022-06-15 15:27 ` Dave Hansen
2022-06-15 17:10 ` Kirill A. Shutemov
2022-06-15 21:55 ` Dave Hansen
2022-06-15 22:43 ` Kirill A. Shutemov
2022-06-15 22:49 ` Dave Hansen
2022-06-15 23:16 ` Kirill A. Shutemov
2022-06-15 18:12 ` Dave Hansen
2022-06-15 22:32 ` Kirill A. Shutemov
2022-06-15 22:36 ` Dave Hansen
2022-06-15 23:16 ` Kirill A. Shutemov [this message]
2022-06-15 22:52 ` Kirill A. Shutemov
2022-06-15 23:34 ` Dave Hansen
2022-06-16 1:19 ` Kirill A. Shutemov
2022-06-16 6:35 ` David Laight
2022-06-17 21:53 ` [tip: x86/urgent] " tip-bot2 for Kirill A. Shutemov
2022-06-17 22:41 ` tip-bot2 for Kirill A. Shutemov
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