diff options
Diffstat (limited to 'target/linux/layerscape/patches-5.4/811-kvm-0001-arm64-KVM-support-flushing-device-memory.patch')
| -rw-r--r-- | target/linux/layerscape/patches-5.4/811-kvm-0001-arm64-KVM-support-flushing-device-memory.patch | 42 |
1 files changed, 0 insertions, 42 deletions
diff --git a/target/linux/layerscape/patches-5.4/811-kvm-0001-arm64-KVM-support-flushing-device-memory.patch b/target/linux/layerscape/patches-5.4/811-kvm-0001-arm64-KVM-support-flushing-device-memory.patch deleted file mode 100644 index 7c9bc079fc..0000000000 --- a/target/linux/layerscape/patches-5.4/811-kvm-0001-arm64-KVM-support-flushing-device-memory.patch +++ /dev/null @@ -1,42 +0,0 @@ -From aa9e99f77f92814a0d83af8e6ed3148458d0f611 Mon Sep 17 00:00:00 2001 -From: Laurentiu Tudor <laurentiu.tudor@nxp.com> -Date: Tue, 26 Jul 2016 15:43:43 +0300 -Subject: [PATCH] arm64: KVM: support flushing device memory - -In the current implementation, trying to flush -memory not covered by the linear map (e.g. device -memory) causes a crash. Add support for flushing -"non-normal" memory by explicitly ioremap()-ing -it when such a case appears and do the cache flush -through this temporary mapping. -This allows dropping the special checks for qman -cacheable region when doing cache flushes. - -Signed-off-by: Laurentiu Tudor <laurentiu.tudor@nxp.com> -[fixed formatting issue] -Signed-off-by: Diana Craciun <diana.craciun@nxp.com> ---- - arch/arm64/include/asm/kvm_mmu.h | 12 ++++++++++-- - 1 file changed, 10 insertions(+), 2 deletions(-) - ---- a/arch/arm64/include/asm/kvm_mmu.h -+++ b/arch/arm64/include/asm/kvm_mmu.h -@@ -341,8 +341,16 @@ static inline void __invalidate_icache_g - static inline void __kvm_flush_dcache_pte(pte_t pte) - { - if (!cpus_have_const_cap(ARM64_HAS_STAGE2_FWB)) { -- struct page *page = pte_page(pte); -- kvm_flush_dcache_to_poc(page_address(page), PAGE_SIZE); -+ if (pfn_valid(pte_pfn(pte))) { -+ struct page *page = pte_page(pte); -+ -+ kvm_flush_dcache_to_poc(page_address(page), PAGE_SIZE); -+ } else { -+ void __iomem *va = ioremap_cache_ns(pte_pfn(pte) << PAGE_SHIFT, PAGE_SIZE); -+ -+ kvm_flush_dcache_to_poc(va, PAGE_SIZE); -+ iounmap(va); -+ } - } - } - |