From: peter.maydell@linaro.org (Peter Maydell)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH] ARM64: KVM: Fix coherent_icache_guest_page() for host with external L3-cache.
Date: Wed, 14 Aug 2013 16:41:12 +0100 [thread overview]
Message-ID: <CAFEAcA_Sexa36nq8r2YsuPptcKFcKytfwGEYi+xm-DO+3j1iSw@mail.gmail.com> (raw)
In-Reply-To: <19553bad1c8427526f6e9a87d605ade3@www.loen.fr>
On 14 August 2013 16:34, Marc Zyngier <maz@misterjones.org> wrote:
> When userspace loads the kernel into memory, the kernel is not flushed
> to RAM, and may sit in the L3 cache if the cache is big enough. You
> end-up executing garbage... My proposed fix is to let kvmtool do the
> flushing, as we have userspace cache management operations for this
> exact purpose.
Why does this issue only apply to the loaded kernel and not to
the zero bytes in the rest of RAM? I know executing zeroes
isn't a very useful thing to do but it should be a well defined
thing.
-- PMM
next prev parent reply other threads:[~2013-08-14 15:41 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-14 11:47 [PATCH] ARM64: KVM: Fix coherent_icache_guest_page() for host with external L3-cache Pranavkumar Sawargaonkar
2013-08-14 12:04 ` Marc Zyngier
2013-08-14 14:22 ` Anup Patel
2013-08-14 15:06 ` Alexander Graf
2013-08-14 15:34 ` Marc Zyngier
2013-08-14 15:41 ` Peter Maydell [this message]
2013-08-14 15:57 ` Marc Zyngier
2013-08-14 16:36 ` Anup Patel
2013-08-14 15:23 ` Marc Zyngier
2013-08-14 15:35 ` Peter Maydell
2013-08-14 15:49 ` Marc Zyngier
2013-08-14 17:34 ` Christoffer Dall
2013-08-15 4:44 ` Marc Zyngier
2013-08-15 16:58 ` Christoffer Dall
2013-08-14 15:36 ` Anup Patel
2013-08-15 4:52 ` Marc Zyngier
2013-08-15 6:26 ` Anup Patel
2013-08-15 8:31 ` Marc Zyngier
2013-08-15 13:31 ` Anup Patel
2013-08-15 14:47 ` Marc Zyngier
2013-08-15 15:13 ` Anup Patel
2013-08-15 15:37 ` Marc Zyngier
2013-08-15 15:45 ` Anup Patel
2013-08-15 16:53 ` Christoffer Dall
2013-08-16 5:02 ` Anup Patel
2013-08-16 6:57 ` Anup Patel
2013-08-16 17:19 ` Christoffer Dall
2013-08-16 17:42 ` Anup Patel
2013-08-16 17:50 ` Christoffer Dall
2013-08-16 18:06 ` Christoffer Dall
2013-08-16 18:20 ` Anup Patel
2013-08-16 18:11 ` Anup Patel
2013-08-16 18:20 ` Christoffer Dall
2013-08-30 9:52 ` Catalin Marinas
2013-08-30 10:44 ` Anup Patel
2013-08-30 13:02 ` Catalin Marinas
2013-08-30 13:21 ` Marc Zyngier
2013-08-30 14:04 ` Catalin Marinas
2013-08-30 14:22 ` Marc Zyngier
2013-08-30 14:30 ` Will Deacon
2013-08-30 14:52 ` Anup Patel
2013-08-30 15:12 ` Marc Zyngier
2013-08-29 10:52 ` Catalin Marinas
2013-08-29 12:31 ` Anup Patel
2013-08-29 12:53 ` Catalin Marinas
2013-08-29 16:02 ` Anup Patel
2013-08-30 9:44 ` Catalin Marinas
2013-08-30 10:36 ` Anup Patel
2013-08-30 12:52 ` Catalin Marinas
2013-08-16 17:14 ` Christoffer Dall
[not found] ` <CALrVBkvEP1Q0mKpv8ViOTLRvW2ks18MQXgmurSBHn+aJcz+=gw@mail.gmail.com>
2013-08-16 17:28 ` Christoffer Dall
2013-08-16 17:42 ` Christoffer Dall
2013-08-15 8:39 ` Pranavkumar Sawargaonkar
2013-08-15 15:42 ` Marc Zyngier
2013-08-14 14:23 ` Sudeep KarkadaNagesha
2013-08-14 14:35 ` Anup Patel
2013-08-14 17:37 ` Christoffer Dall
-- strict thread matches above, loose matches on Subject: below --
2013-08-14 11:45 Pranavkumar Sawargaonkar
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