linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Joerg Roedel <joro@8bytes.org>
To: Mike Rapoport <rppt@kernel.org>
Cc: x86@kernel.org, Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	hpa@zytor.com, jroedel@suse.de,
	Andrew Morton <akpm@linux-foundation.org>,
	Brijesh Singh <brijesh.singh@amd.com>,
	linux-kernel@vger.kernel.org, stable@vger.kernel.org
Subject: Re: [PATCH] x86/64/mm: Map all kernel memory into trampoline_pgd
Date: Wed, 15 Sep 2021 13:49:50 +0200	[thread overview]
Message-ID: <YUHd3kGUngaB758q@8bytes.org> (raw)
In-Reply-To: <YUBUx6KVwAp9b3b4@kernel.org>

Hi Mike,

On Tue, Sep 14, 2021 at 10:52:39AM +0300, Mike Rapoport wrote:
> On Mon, Sep 13, 2021 at 11:52:36AM +0200, Joerg Roedel wrote:
> > +	for (i = pgd_index(__PAGE_OFFSET); i < PTRS_PER_PGD; i++)
> > +		trampoline_pgd[i] = init_top_pgt[i].pgd;
> 
> Don't we need to update the trampoline_pgd in sync_global_pgds() as well?

No, the trampoline_pgd is setup after preallocate_vmalloc_pages(), so
everything that would need synchronization is already in the reference
page-table.

Regards,

	Joerg

      reply	other threads:[~2021-09-15 11:50 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-13  9:52 Joerg Roedel
2021-09-14  7:52 ` Mike Rapoport
2021-09-15 11:49   ` Joerg Roedel [this message]

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=YUHd3kGUngaB758q@8bytes.org \
    --to=joro@8bytes.org \
    --cc=akpm@linux-foundation.org \
    --cc=bp@alien8.de \
    --cc=brijesh.singh@amd.com \
    --cc=hpa@zytor.com \
    --cc=jroedel@suse.de \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@redhat.com \
    --cc=rppt@kernel.org \
    --cc=stable@vger.kernel.org \
    --cc=tglx@linutronix.de \
    --cc=x86@kernel.org \
    --subject='Re: [PATCH] x86/64/mm: Map all kernel memory into trampoline_pgd' \
    /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

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).