From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
To: Juergen Gross <jgross@suse.com>,
linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org,
x86@kernel.org
Cc: hpa@zytor.com, tglx@linutronix.de, mingo@redhat.com
Subject: Re: [PATCH RESEND] x86/xen: enable early use of set_fixmap in 32-bit Xen PV guest
Date: Mon, 20 Aug 2018 19:20:17 -0400 [thread overview]
Message-ID: <95bde638-877d-c9b4-0457-dfeea06fd7dc@oracle.com> (raw)
In-Reply-To: <20180820152420.16004-1-jgross@suse.com>
On 08/20/2018 11:24 AM, Juergen Gross wrote:
> Commit 7b25b9cb0dad83 ("x86/xen/time: Initialize pv xen time in
> init_hypervisor_platform()") moved the mapping of the shared info area
> before pagetable_init(). This breaks booting as 32-bit PV guest as the
> use of set_fixmap isn't possible at this time on 32-bit.
>
> This can be worked around by populating the needed PMD on 32-bit
> kernel earlier.
>
> In order not to reimplement populate_extra_pte() using extend_brk()
> for allocating new page tables extend alloc_low_pages() to do that in
> case the early page table pool is not yet available.
>
> Fixes: 7b25b9cb0dad83 ("x86/xen/time: Initialize pv xen time in init_hypervisor_platform()")
> Signed-off-by: Juergen Gross <jgross@suse.com>
> Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
> ---
> Resending with corrected Fixes: tag
> Boris, please take this via the Xen tree (Thomas asked us to do so)
Applied to for-linus-19b.
-boris
prev parent reply other threads:[~2018-08-20 23:19 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-20 15:24 Juergen Gross
2018-08-20 16:56 ` Boris Ostrovsky
2018-08-20 17:05 ` Juergen Gross
2018-08-20 23:20 ` Boris Ostrovsky [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=95bde638-877d-c9b4-0457-dfeea06fd7dc@oracle.com \
--to=boris.ostrovsky@oracle.com \
--cc=hpa@zytor.com \
--cc=jgross@suse.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@redhat.com \
--cc=tglx@linutronix.de \
--cc=x86@kernel.org \
--cc=xen-devel@lists.xenproject.org \
/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
all inboxes | Powered by JetHome®