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From: Thomas Gleixner <tglx@linutronix.de>
To: Juergen Gross <jgross@suse.com>
Cc: linux-kernel@vger.kernel.org, xen-devel@lists.xenproject.org,
	x86@kernel.org, boris.ostrovsky@oracle.com, hpa@zytor.com,
	mingo@redhat.com, pasha.tatashin@oracle.com
Subject: Re: [PATCH] x86/xen: enable early use of set_fixmap in 32-bit Xen PV guest
Date: Mon, 20 Aug 2018 15:18:06 +0200 (CEST)	[thread overview]
Message-ID: <alpine.DEB.2.21.1808201514100.1551@nanos.tec.linutronix.de> (raw)
In-Reply-To: <20180817134016.19957-1-jgross@suse.com>

On Fri, 17 Aug 2018, 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

  ^^^ That's missing the subject text

Other than that:

Reviewd-by: Thomas Gleixner <tglx@linutronix.de>


  reply	other threads:[~2018-08-20 13:18 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-08-17 13:40 [PATCH] x86/xen: enable early use of set_fixmap in 32-bit Xen PV guest Juergen Gross
2018-08-20 13:18 ` Thomas Gleixner [this message]
2018-08-20 13:18 ` Thomas Gleixner
2018-08-22 19:28 ` Pasha Tatashin
2018-08-22 19:28 ` Pasha Tatashin
  -- strict thread matches above, loose matches on Subject: below --
2018-08-17 13:40 Juergen Gross

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