Commit 411406a8 authored by Thomas Bogendoerfer's avatar Thomas Bogendoerfer
Browse files

MIPS: kvm: Use vm_get_page_prot to get protection bits 



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: default avatarThomas Bogendoerfer <tsbogend@alpha.franken.de>
parent 724d554a

arch/mips/kvm/mmu.c

+3 −1
Original line number Diff line number Diff line
@@ -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);