From: Peng Hao <peng.hao2@zte.com.cn>
To: christoffer.dall@linaro.org, marc.zyngier@arm.com
Cc: linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu, linux-kernel@vger.kernel.org,
Peng Hao <peng.hao2@zte.com.cn>
Subject: [PATCH] KVM:arm/arm64: dcache need be coherent unconditionally
Date: Sat, 10 Mar 2018 06:15:03 +0800 [thread overview]
Message-ID: <1520633703-15121-1-git-send-email-peng.hao2@zte.com.cn> (raw)
For emulation devices just like vga, keeping coherent dcache between
guest and host timely is needed.
Now the display of vnc-viewer will not update continuously and the
patch can fix up.
Signed-off-by: Peng Hao <peng.hao2@zte.com.cn>
---
virt/kvm/arm/mmu.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)
diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c
index ec62d1c..4a28395e 100644
--- a/virt/kvm/arm/mmu.c
+++ b/virt/kvm/arm/mmu.c
@@ -1416,8 +1416,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
kvm_set_pfn_dirty(pfn);
}
- if (fault_status != FSC_PERM)
- clean_dcache_guest_page(pfn, PMD_SIZE);
+ clean_dcache_guest_page(pfn, PMD_SIZE);
if (exec_fault) {
new_pmd = kvm_s2pmd_mkexec(new_pmd);
@@ -1438,8 +1437,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
mark_page_dirty(kvm, gfn);
}
- if (fault_status != FSC_PERM)
- clean_dcache_guest_page(pfn, PAGE_SIZE);
+ clean_dcache_guest_page(pfn, PAGE_SIZE);
if (exec_fault) {
new_pte = kvm_s2pte_mkexec(new_pte);
--
1.8.3.1
next reply other threads:[~2018-03-09 14:02 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-09 22:15 Peng Hao [this message]
2018-03-09 14:21 ` [PATCH] KVM:arm/arm64: dcache need be coherent unconditionally Marc Zyngier
[not found] <201803101123186035154@zte.com.cn>
2018-03-10 11:48 ` Marc Zyngier
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