Messages in this thread Patch in this message | | | From | Peng Hao <> | Subject | [PATCH] KVM:arm/arm64: dcache need be coherent unconditionally | Date | Sat, 10 Mar 2018 06:15:03 +0800 |
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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
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