From: Rik van Riel <riel@surriel.com>
To: Tom Lendacky <thomas.lendacky@amd.com>, Borislav Petkov <bp@alien8.de>
Cc: x86@kernel.org, linux-kernel@vger.kernel.org,
peterz@infradead.org, dave.hansen@linux.intel.com,
zhengqi.arch@bytedance.com, nadav.amit@gmail.com,
kernel-team@meta.com, linux-mm@kvack.org,
akpm@linux-foundation.org, jackmanb@google.com,
jannh@google.com, mhklinux@outlook.com,
andrew.cooper3@citrix.com, Manali.Shukla@amd.com,
mingo@kernel.org
Subject: Re: [PATCH v13 06/14] x86/mm: use broadcast TLB flushing for page reclaim TLB flushing
Date: Wed, 26 Feb 2025 12:02:47 -0500 [thread overview]
Message-ID: <297b28e9ef9f4cd983ae2e3dd4cf1fce8b74d0f1.camel@surriel.com> (raw)
In-Reply-To: <680053d3-4cf9-534a-1c52-c6e259b85452@amd.com>
On Wed, 2025-02-26 at 11:00 -0600, Tom Lendacky wrote:
> On 2/25/25 15:03, Borislav Petkov wrote:
> > On Tue, Feb 25, 2025 at 09:38:03PM +0100, Borislav Petkov wrote:
> > > On Tue, Feb 25, 2025 at 02:17:20PM -0500, Rik van Riel wrote:
> > > > Who do we need to ask to confirm that reading?
> > >
> > > Lemme figure it out.
> >
> > Confirmed - that really is the case.
>
> Hmmm... since this is for host/hypervisor TLB handling, this makes me
> think that we should always be setting the ASID valid bit with 0 for
> the
> ASID value in EDX[15:0] on all INVLPGB instructions in this series.
> Otherwise we will also be flushing any guest ASID TLB entries that
> match
> the conditions, when that isn't intended.
The ASID is always zero in this series.
We only ever use the PCID for address space identification.
--
All Rights Reversed.
next prev parent reply other threads:[~2025-02-26 17:03 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-23 19:48 [PATCH v13 00/14] AMD broadcast TLB invalidation Rik van Riel
2025-02-23 19:48 ` [PATCH v13 01/14] x86/mm: consolidate full flush threshold decision Rik van Riel
2025-02-24 11:48 ` Borislav Petkov
2025-02-23 19:48 ` [PATCH v13 02/14] x86/mm: get INVLPGB count max from CPUID Rik van Riel
2025-02-24 12:00 ` Borislav Petkov
2025-02-23 19:48 ` [PATCH v13 03/14] x86/mm: add INVLPGB support code Rik van Riel
2025-02-24 12:14 ` Borislav Petkov
2025-02-23 19:48 ` [PATCH v13 04/14] x86/mm: use INVLPGB for kernel TLB flushes Rik van Riel
2025-02-24 12:31 ` Borislav Petkov
2025-02-24 12:44 ` Nadav Amit
2025-02-23 19:48 ` [PATCH v13 05/14] x86/mm: use INVLPGB in flush_tlb_all Rik van Riel
2025-02-24 12:46 ` Borislav Petkov
2025-02-23 19:48 ` [PATCH v13 06/14] x86/mm: use broadcast TLB flushing for page reclaim TLB flushing Rik van Riel
2025-02-24 13:27 ` Borislav Petkov
2025-02-25 19:17 ` Rik van Riel
2025-02-25 20:38 ` Borislav Petkov
2025-02-25 21:03 ` Borislav Petkov
2025-02-25 22:03 ` Rik van Riel
2025-02-26 17:00 ` Tom Lendacky
2025-02-26 17:02 ` Rik van Riel [this message]
2025-02-26 17:36 ` Tom Lendacky
2025-02-26 17:46 ` Rik van Riel
2025-02-26 18:12 ` Tom Lendacky
2025-02-26 22:01 ` Rik van Riel
2025-02-28 1:13 ` Rik van Riel
2025-02-28 15:02 ` Tom Lendacky
2025-02-28 15:57 ` Sean Christopherson
2025-02-28 20:42 ` Tom Lendacky
2025-02-23 19:48 ` [PATCH v13 07/14] x86/mm: global ASID allocation helper functions Rik van Riel
2025-02-24 14:16 ` Borislav Petkov
2025-02-25 20:22 ` Rik van Riel
2025-02-23 19:48 ` [PATCH v13 08/14] x86/mm: global ASID context switch & TLB flush handling Rik van Riel
2025-02-23 23:08 ` kernel test robot
2025-02-24 1:26 ` Rik van Riel
2025-02-24 2:01 ` Rik van Riel
2025-02-24 18:41 ` kernel test robot
2025-02-23 19:48 ` [PATCH v13 09/14] x86/mm: global ASID process exit helpers Rik van Riel
2025-02-23 19:49 ` [PATCH v13 10/14] x86/mm: enable broadcast TLB invalidation for multi-threaded processes Rik van Riel
2025-02-23 19:49 ` [PATCH v13 11/14] x86/mm: do targeted broadcast flushing from tlbbatch code Rik van Riel
2025-02-23 19:49 ` [PATCH v13 12/14] x86/mm: enable AMD translation cache extensions Rik van Riel
2025-02-23 19:49 ` [PATCH v13 13/14] x86/mm: only invalidate final translations with INVLPGB Rik van Riel
2025-02-23 19:49 ` [PATCH v13 14/14] x86/mm: add noinvlpgb commandline option Rik van Riel
2025-02-23 21:29 ` Borislav Petkov
2025-02-24 0:34 ` Rik van Riel
2025-02-24 6:29 ` Borislav Petkov
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=297b28e9ef9f4cd983ae2e3dd4cf1fce8b74d0f1.camel@surriel.com \
--to=riel@surriel.com \
--cc=Manali.Shukla@amd.com \
--cc=akpm@linux-foundation.org \
--cc=andrew.cooper3@citrix.com \
--cc=bp@alien8.de \
--cc=dave.hansen@linux.intel.com \
--cc=jackmanb@google.com \
--cc=jannh@google.com \
--cc=kernel-team@meta.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-mm@kvack.org \
--cc=mhklinux@outlook.com \
--cc=mingo@kernel.org \
--cc=nadav.amit@gmail.com \
--cc=peterz@infradead.org \
--cc=thomas.lendacky@amd.com \
--cc=x86@kernel.org \
--cc=zhengqi.arch@bytedance.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox