diff mbox

[v4,6/6] KVM: arm/arm64: Remove unnecessary CMOs when creating HYP page tables

Message ID 20180702150250.16550-7-marc.zyngier@arm.com (mailing list archive)
State New, archived
Headers show

Commit Message

Marc Zyngier July 2, 2018, 3:02 p.m. UTC 
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 <mark.rutland@arm.com>
Acked-by: Christoffer Dall <christoffer.dall@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
---
 virt/kvm/arm/mmu.c | 4 ----
 1 file changed, 4 deletions(-)
diff mbox

Patch

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);