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From: Ben Hutchings <ben@decadent.org.uk>
To: Ard Biesheuvel <ard.biesheuvel@linaro.org>,
	Pavel Fedin <p.fedin@samsung.com>
Cc: "kvmarm@lists.cs.columbia.edu" <kvmarm@lists.cs.columbia.edu>,
	KVM devel mailing list <kvm@vger.kernel.org>,
	Marc Zyngier <marc.zyngier@arm.com>,
	Christoffer Dall <christoffer.dall@linaro.org>,
	"stable@vger.kernel.org" <stable@vger.kernel.org>
Subject: Re: [PATCH] KVM: arm/arm64: Revert to old way of checking for device mapping in stage2_flush_ptes().
Date: Fri, 04 Dec 2015 01:58:57 +0000	[thread overview]
Message-ID: <1449194337.30642.69.camel@decadent.org.uk> (raw)
In-Reply-To: <CAKv+Gu-WhtTZoPEmRSa8Ypcc9SZ-d6NABDSfZ6tTx14Tyt+AdQ@mail.gmail.com>

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On Wed, 2015-12-02 at 18:41 +0100, Ard Biesheuvel wrote:
> Hi Pavel,
> 
> Thanks for getting to the bottom of this.
> 
> On 1 December 2015 at 14:03, Pavel Fedin <p.fedin@samsung.com> wrote:
> > This function takes stage-II physical addresses (A.K.A. IPA), on input, not
> > real physical addresses. This causes kvm_is_device_pfn() to return wrong
> > values, depending on how much guest and host memory maps match. This
> > results in completely broken KVM on some boards. The problem has been
> > caught on Samsung proprietary hardware.
> > 
> > Cc: stable@vger.kernel.org
> > Fixes: e6fab5442345 ("ARM/arm64: KVM: test properly for a PTE's uncachedness")
> > 
> 
> That commit is not in a release yet, so no need for cc stable
[...]

But it is cc'd to stable, so unless it is going to be nacked at review
stage, any subsequent fixes should also be cc'd.

Ben.

-- 
Ben Hutchings
For every action, there is an equal and opposite criticism. - Harrison

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  parent reply	other threads:[~2015-12-04  1:59 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-12-01 13:03 [PATCH] KVM: arm/arm64: Revert to old way of checking for device mapping in stage2_flush_ptes() Pavel Fedin
2015-12-01 13:03 ` Pavel Fedin
2015-12-02 17:41 ` Ard Biesheuvel
2015-12-03  7:14   ` Pavel Fedin
2015-12-03  8:09     ` Ard Biesheuvel
2015-12-03  8:14       ` Pavel Fedin
2015-12-04  1:58   ` Ben Hutchings [this message]
2015-12-04  6:39     ` Pavel Fedin
2015-12-04  8:37     ` Ard Biesheuvel
2015-12-02 18:50 ` Christoffer Dall
2015-12-02 19:04   ` Ard Biesheuvel
2015-12-02 19:23     ` Christoffer Dall

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