From 0a72a5ab9feb8ba6101b00bbcac14cdbae1d1df7 Mon Sep 17 00:00:00 2001 From: Marc Zyngier Date: Tue, 1 May 2018 12:09:42 +0100 Subject: [PATCH] KVM: arm/arm64: Remove unnecessary CMOs when creating HYP page tables There is no need to perform cache maintenance operations when creating the HYP page tables if we have the multiprocessing extensions. ARMv7 mandates them with the virtualization support, and ARMv8 just mandates them unconditionally. Let's remove these operations. Acked-by: Mark Rutland Acked-by: Christoffer Dall Signed-off-by: Marc Zyngier --- virt/kvm/arm/mmu.c | 4 ---- 1 file changed, 4 deletions(-) diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c index eade30caaa3c..97d27cd9c654 100644 --- a/virt/kvm/arm/mmu.c +++ b/virt/kvm/arm/mmu.c @@ -609,7 +609,6 @@ static void create_hyp_pte_mappings(pmd_t *pmd, unsigned long start, pte = pte_offset_kernel(pmd, addr); kvm_set_pte(pte, pfn_pte(pfn, prot)); get_page(virt_to_page(pte)); - kvm_flush_dcache_to_poc(pte, sizeof(*pte)); pfn++; } while (addr += PAGE_SIZE, addr != end); } @@ -636,7 +635,6 @@ static int create_hyp_pmd_mappings(pud_t *pud, unsigned long start, } kvm_pmd_populate(pmd, pte); get_page(virt_to_page(pmd)); - kvm_flush_dcache_to_poc(pmd, sizeof(*pmd)); } next = pmd_addr_end(addr, end); @@ -669,7 +667,6 @@ static int create_hyp_pud_mappings(pgd_t *pgd, unsigned long start, } kvm_pud_populate(pud, pmd); get_page(virt_to_page(pud)); - kvm_flush_dcache_to_poc(pud, sizeof(*pud)); } next = pud_addr_end(addr, end); @@ -706,7 +703,6 @@ static int __create_hyp_mappings(pgd_t *pgdp, unsigned long ptrs_per_pgd, } kvm_pgd_populate(pgd, pud); get_page(virt_to_page(pgd)); - kvm_flush_dcache_to_poc(pgd, sizeof(*pgd)); } next = pgd_addr_end(addr, end);