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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>
This commit is contained in:
Marc Zyngier 2018-05-01 12:09:42 +01:00
parent 0db9dd8a0f
commit 0a72a5ab9f
1 changed files with 0 additions and 4 deletions
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4
virt/kvm/arm/mmu.c
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@ -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);