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authorMarc Zyngier <marc.zyngier@arm.com>2018-05-01 14:09:42 +0300
committerMarc Zyngier <marc.zyngier@arm.com>2018-07-09 13:37:42 +0300
commit0a72a5ab9feb8ba6101b00bbcac14cdbae1d1df7 (patch)
tree384e47031fb371f87480294c98ed93d7988f7b0d /virt/kvm
parent0db9dd8a0fbd5c861737bf2a8a2852e56dbd7ceb (diff)
downloadlinux-0a72a5ab9feb8ba6101b00bbcac14cdbae1d1df7.tar.xz
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 <mark.rutland@arm.com> Acked-by: Christoffer Dall <christoffer.dall@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'virt/kvm')
-rw-r--r--virt/kvm/arm/mmu.c4
1 files changed, 0 insertions, 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);