From: pranavkumar@linaro.org (Pranavkumar Sawargaonkar)
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 17:15:05 +0530 [thread overview]
Message-ID: <1376480706-18642-1-git-send-email-pranavkumar@linaro.org> (raw)
Systems with large external L3-cache (few MBs), might have dirty
content belonging to the guest page in L3-cache. To tackle this,
we need to flush such dirty content from d-cache so that guest
will see correct contents of guest page when guest MMU is disabled.
The patch fixes coherent_icache_guest_page() for external L3-cache.
Signed-off-by: Pranavkumar Sawargaonkar <pranavkumar@linaro.org>
Signed-off-by: Anup Patel <anup.patel@linaro.org>
---
arch/arm64/include/asm/kvm_mmu.h | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h
index efe609c..5129038 100644
--- a/arch/arm64/include/asm/kvm_mmu.h
+++ b/arch/arm64/include/asm/kvm_mmu.h
@@ -123,6 +123,8 @@ static inline void coherent_icache_guest_page(struct kvm *kvm, gfn_t gfn)
if (!icache_is_aliasing()) { /* PIPT */
unsigned long hva = gfn_to_hva(kvm, gfn);
flush_icache_range(hva, hva + PAGE_SIZE);
+ /* Flush d-cache for systems with external caches. */
+ __flush_dcache_area((void *) hva, PAGE_SIZE);
} else if (!icache_is_aivivt()) { /* non ASID-tagged VIVT */
/* any kind of VIPT cache */
__flush_icache_all();
--
1.7.9.5
next reply other threads:[~2013-08-14 11:45 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-14 11:45 Pranavkumar Sawargaonkar [this message]
-- strict thread matches above, loose matches on Subject: below --
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
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
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