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From: David Vrabel <david.vrabel@citrix.com>
To: Mukesh Rathor <mukesh.rathor@oracle.com>,
	<boris.ostrovsky@oracle.com>, <david.vrabel@citrix.com>
Cc: <xen-devel@lists.xenproject.org>, <linux-kernel@vger.kernel.org>
Subject: Re: [Xen-devel] [V5 PATCH 1/1] x86/xen: Set EFER.NX and EFER.SCE in PVH guests
Date: Fri, 26 Sep 2014 18:26:38 +0100	[thread overview]
Message-ID: <5425A1CE.7090704@citrix.com> (raw)
In-Reply-To: <1410392166-16388-2-git-send-email-mukesh.rathor@oracle.com>

On 11/09/14 00:36, Mukesh Rathor wrote:
> This fixes two bugs in PVH guests:
> 
>   - Not setting EFER.NX means the NX bit in page table entries is
>     ignored on Intel processors and causes reserved bit page faults on
>     AMD processors.
> 
>   - After the Xen commit 7645640d6ff1 ("x86/PVH: don't set EFER_SCE for
>     pvh guest") PVH guests are required to set EFER.SCE to enable the
>     SYSCALL instruction.
> 
> Secondary VCPUs are started with pagetables with the NX bit set so
> EFER.NX must be set before using any stack or data segment.
> xen_pvh_cpu_early_init() is the new secondary VCPU entry point that
> sets EFER before jumping to cpu_bringup_and_idle().

Applied to devel/for-linus-3.18

Thanks.

David

      parent reply	other threads:[~2014-09-26 17:26 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-09-10 23:36 [V5 PATCH 0/1] x86/xen: Set EFER.NX and EFER.SCE in PVH guests Mukesh Rathor
2014-09-10 23:36 ` [V5 PATCH 1/1] " Mukesh Rathor
2014-09-12 20:42   ` [Xen-devel] " Konrad Rzeszutek Wilk
2014-09-12 20:46     ` Mukesh Rathor
2014-09-15 14:45     ` David Vrabel
2014-09-15 19:28       ` Konrad Rzeszutek Wilk
2014-09-16  1:33     ` Mukesh Rathor
2014-09-26 17:26   ` David Vrabel [this message]

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