From: catalin.marinas@arm.com (Catalin Marinas)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v3 06/11] ARM: KVM: force cache clean on page fault when caches are off
Date: Thu, 6 Feb 2014 10:49:05 +0000 [thread overview]
Message-ID: <20140206104904.GC29446@arm.com> (raw)
In-Reply-To: <1391630151-7875-7-git-send-email-marc.zyngier@arm.com>
On Wed, Feb 05, 2014 at 07:55:46PM +0000, Marc Zyngier wrote:
> In order for a guest with caches disabled to observe data written
> contained in a given page, we need to make sure that page is
> committed to memory, and not just hanging in the cache (as guest
> accesses are completely bypassing the cache until it decides to
> enable it).
>
> For this purpose, hook into the coherent_cache_guest_page
> function and flush the region if the guest SCTLR
> register doesn't show the MMU and caches as being enabled.
>
> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
WARNING: multiple messages have this Message-ID (diff)
From: Catalin Marinas <catalin.marinas@arm.com>
To: Marc Zyngier <marc.zyngier@arm.com>
Cc: "linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
"kvmarm@lists.cs.columbia.edu" <kvmarm@lists.cs.columbia.edu>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>,
Christoffer Dall <christoffer.dall@linaro.org>
Subject: Re: [PATCH v3 06/11] ARM: KVM: force cache clean on page fault when caches are off
Date: Thu, 6 Feb 2014 10:49:05 +0000 [thread overview]
Message-ID: <20140206104904.GC29446@arm.com> (raw)
In-Reply-To: <1391630151-7875-7-git-send-email-marc.zyngier@arm.com>
On Wed, Feb 05, 2014 at 07:55:46PM +0000, Marc Zyngier wrote:
> In order for a guest with caches disabled to observe data written
> contained in a given page, we need to make sure that page is
> committed to memory, and not just hanging in the cache (as guest
> accesses are completely bypassing the cache until it decides to
> enable it).
>
> For this purpose, hook into the coherent_cache_guest_page
> function and flush the region if the guest SCTLR
> register doesn't show the MMU and caches as being enabled.
>
> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
> Reviewed-by: Christoffer Dall <christoffer.dall@linaro.org>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
next prev parent reply other threads:[~2014-02-06 10:49 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-02-05 19:55 [PATCH v3 00/11] arm/arm64: KVM: host cache maintenance when guest caches are off Marc Zyngier
2014-02-05 19:55 ` Marc Zyngier
2014-02-05 19:55 ` [PATCH v3 01/11] arm64: KVM: force cache clean on page fault when " Marc Zyngier
2014-02-05 19:55 ` Marc Zyngier
2014-02-05 19:55 ` [PATCH v3 02/11] arm64: KVM: allows discrimination of AArch32 sysreg access Marc Zyngier
2014-02-05 19:55 ` Marc Zyngier
2014-02-05 19:55 ` [PATCH v3 03/11] arm64: KVM: trap VM system registers until MMU and caches are ON Marc Zyngier
2014-02-05 19:55 ` Marc Zyngier
2014-02-05 19:55 ` [PATCH v3 04/11] arm64: KVM: flush VM pages before letting the guest enable caches Marc Zyngier
2014-02-05 19:55 ` Marc Zyngier
2014-02-07 4:08 ` Christoffer Dall
2014-02-07 4:08 ` Christoffer Dall
2014-02-05 19:55 ` [PATCH v3 05/11] ARM: LPAE: provide an IPA capable pmd_addr_end Marc Zyngier
2014-02-05 19:55 ` Marc Zyngier
2014-02-06 10:43 ` Catalin Marinas
2014-02-06 10:43 ` Catalin Marinas
2014-02-07 4:04 ` Christoffer Dall
2014-02-07 4:04 ` Christoffer Dall
2014-02-07 15:44 ` Catalin Marinas
2014-02-07 15:44 ` Catalin Marinas
2014-02-07 17:10 ` Christoffer Dall
2014-02-07 17:10 ` Christoffer Dall
2014-02-11 9:07 ` Marc Zyngier
2014-02-11 9:07 ` Marc Zyngier
2014-02-05 19:55 ` [PATCH v3 06/11] ARM: KVM: force cache clean on page fault when caches are off Marc Zyngier
2014-02-05 19:55 ` Marc Zyngier
2014-02-06 10:49 ` Catalin Marinas [this message]
2014-02-06 10:49 ` Catalin Marinas
2014-02-05 19:55 ` [PATCH v3 07/11] ARM: KVM: fix handling of trapped 64bit coprocessor accesses Marc Zyngier
2014-02-05 19:55 ` Marc Zyngier
2014-02-06 10:49 ` Catalin Marinas
2014-02-06 10:49 ` Catalin Marinas
2014-02-05 19:55 ` [PATCH v3 08/11] ARM: KVM: fix ordering of " Marc Zyngier
2014-02-05 19:55 ` Marc Zyngier
2014-02-06 10:50 ` Catalin Marinas
2014-02-06 10:50 ` Catalin Marinas
2014-02-05 19:55 ` [PATCH v3 09/11] ARM: KVM: introduce per-vcpu HYP Configuration Register Marc Zyngier
2014-02-05 19:55 ` Marc Zyngier
2014-02-06 11:01 ` Catalin Marinas
2014-02-06 11:01 ` Catalin Marinas
2014-02-05 19:55 ` [PATCH v3 10/11] ARM: KVM: add world-switch for AMAIR{0,1} Marc Zyngier
2014-02-05 19:55 ` Marc Zyngier
2014-02-06 11:02 ` Catalin Marinas
2014-02-06 11:02 ` Catalin Marinas
2014-02-05 19:55 ` [PATCH v3 11/11] ARM: KVM: trap VM system registers until MMU and caches are ON Marc Zyngier
2014-02-05 19:55 ` Marc Zyngier
2014-02-06 11:03 ` Catalin Marinas
2014-02-06 11:03 ` Catalin Marinas
2014-02-07 4:08 ` Christoffer Dall
2014-02-07 4:08 ` Christoffer Dall
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