From mboxrd@z Thu Jan 1 00:00:00 1970 From: pranavkumar@linaro.org (Pranavkumar Sawargaonkar) Date: Wed, 14 Aug 2013 17:15:05 +0530 Subject: [PATCH] ARM64: KVM: Fix coherent_icache_guest_page() for host with external L3-cache. Message-ID: <1376480706-18642-1-git-send-email-pranavkumar@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org 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 Signed-off-by: Anup Patel --- 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