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MIPS: kvm: Use vm_get_page_prot to get protection bits

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MIPS protection bits are setup during runtime so using defines like
PAGE_SHARED ignores this runtime changes. Using vm_get_page_prot
to get correct page protection fixes this.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
This commit is contained in:
Thomas Bogendoerfer 2020-11-13 12:09:50 +01:00
parent 724d554a11
commit 411406a8c7
1 changed files with 3 additions and 1 deletions
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4
arch/mips/kvm/mmu.c
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@ -1074,6 +1074,7 @@ int kvm_mips_handle_commpage_tlb_fault(unsigned long badvaddr,
{
kvm_pfn_t pfn;
pte_t *ptep;
pgprot_t prot;
ptep = kvm_trap_emul_pte_for_gva(vcpu, badvaddr);
if (!ptep) {
@ -1083,7 +1084,8 @@ int kvm_mips_handle_commpage_tlb_fault(unsigned long badvaddr,
pfn = PFN_DOWN(virt_to_phys(vcpu->arch.kseg0_commpage));
/* Also set valid and dirty, so refill handler doesn't have to */
*ptep = pte_mkyoung(pte_mkdirty(pfn_pte(pfn, PAGE_SHARED)));
prot = vm_get_page_prot(VM_READ|VM_WRITE|VM_SHARED);
*ptep = pte_mkyoung(pte_mkdirty(pfn_pte(pfn, prot)));
/* Invalidate this entry in the TLB, guest kernel ASID only */
kvm_mips_host_tlb_inv(vcpu, badvaddr, false, true);