diff options
Diffstat (limited to 'arch/mips/kvm/mmu.c')
| -rw-r--r-- | arch/mips/kvm/mmu.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/arch/mips/kvm/mmu.c b/arch/mips/kvm/mmu.c index 62122d297e52..98f1a7715a68 100644 --- a/arch/mips/kvm/mmu.c +++ b/arch/mips/kvm/mmu.c @@ -449,6 +449,27 @@ int kvm_mips_handle_mapped_seg_tlb_fault(struct kvm_vcpu *vcpu, return 0; } +int kvm_mips_handle_commpage_tlb_fault(unsigned long badvaddr, + struct kvm_vcpu *vcpu) +{ + kvm_pfn_t pfn; + pte_t *ptep; + + ptep = kvm_trap_emul_pte_for_gva(vcpu, badvaddr); + if (!ptep) { + kvm_err("No ptep for commpage %lx\n", badvaddr); + return -1; + } + + 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))); + + /* Invalidate this entry in the TLB, guest kernel ASID only */ + kvm_mips_host_tlb_inv(vcpu, badvaddr, false, true); + return 0; +} + void kvm_get_new_mmu_context(struct mm_struct *mm, unsigned long cpu, struct kvm_vcpu *vcpu) { |