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| author | James Hogan <james.hogan@imgtec.com> | 2016-06-15 20:29:58 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-06-15 23:58:37 +0200 |
| commit | 7414d2f65006ac8609196092f2869e0942599b72 (patch) | |
| tree | ded5f615069c23c970bd05563cd690330e37eee9 | |
| parent | MIPS: KVM: Move commpage so 0x0 is unmapped (diff) | |
| download | linux-7414d2f65006ac8609196092f2869e0942599b72.tar.xz linux-7414d2f65006ac8609196092f2869e0942599b72.zip | |
MIPS: KVM: Use host CCA for TLB mappings
KVM TLB mappings for the guest were being created with a cache coherency
attribute (CCA) of 3, which is cached incoherent. Create them instead
with the default host CCA, which should be the correct one for coherency
on SMP systems.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: linux-mips@linux-mips.org
Cc: kvm@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | arch/mips/kvm/mmu.c | 18 | ||||
| -rw-r--r-- | arch/mips/kvm/tlb.c | 3 |
2 files changed, 12 insertions, 9 deletions
diff --git a/arch/mips/kvm/mmu.c b/arch/mips/kvm/mmu.c index 2f494ec5c939..ecead748de04 100644 --- a/arch/mips/kvm/mmu.c +++ b/arch/mips/kvm/mmu.c @@ -116,9 +116,11 @@ int kvm_mips_handle_kseg0_tlb_fault(unsigned long badvaddr, pfn1 = kvm->arch.guest_pmap[gfn | 0x1]; entrylo0 = mips3_paddr_to_tlbpfn(pfn0 << PAGE_SHIFT) | - (0x3 << ENTRYLO_C_SHIFT) | ENTRYLO_D | ENTRYLO_V; + ((_page_cachable_default >> _CACHE_SHIFT) << ENTRYLO_C_SHIFT) | + ENTRYLO_D | ENTRYLO_V; entrylo1 = mips3_paddr_to_tlbpfn(pfn1 << PAGE_SHIFT) | - (0x3 << ENTRYLO_C_SHIFT) | ENTRYLO_D | ENTRYLO_V; + ((_page_cachable_default >> _CACHE_SHIFT) << ENTRYLO_C_SHIFT) | + ENTRYLO_D | ENTRYLO_V; preempt_disable(); entryhi = (vaddr | kvm_mips_get_kernel_asid(vcpu)); @@ -157,13 +159,13 @@ int kvm_mips_handle_mapped_seg_tlb_fault(struct kvm_vcpu *vcpu, /* Get attributes from the Guest TLB */ entrylo0 = mips3_paddr_to_tlbpfn(pfn0 << PAGE_SHIFT) | - (0x3 << ENTRYLO_C_SHIFT) | - (tlb->tlb_lo[0] & ENTRYLO_D) | - (tlb->tlb_lo[0] & ENTRYLO_V); + ((_page_cachable_default >> _CACHE_SHIFT) << ENTRYLO_C_SHIFT) | + (tlb->tlb_lo[0] & ENTRYLO_D) | + (tlb->tlb_lo[0] & ENTRYLO_V); entrylo1 = mips3_paddr_to_tlbpfn(pfn1 << PAGE_SHIFT) | - (0x3 << ENTRYLO_C_SHIFT) | - (tlb->tlb_lo[1] & ENTRYLO_D) | - (tlb->tlb_lo[1] & ENTRYLO_V); + ((_page_cachable_default >> _CACHE_SHIFT) << ENTRYLO_C_SHIFT) | + (tlb->tlb_lo[1] & ENTRYLO_D) | + (tlb->tlb_lo[1] & ENTRYLO_V); kvm_debug("@ %#lx tlb_lo0: 0x%08lx tlb_lo1: 0x%08lx\n", vcpu->arch.pc, tlb->tlb_lo[0], tlb->tlb_lo[1]); diff --git a/arch/mips/kvm/tlb.c b/arch/mips/kvm/tlb.c index 385fbd34e77d..9699352293e4 100644 --- a/arch/mips/kvm/tlb.c +++ b/arch/mips/kvm/tlb.c @@ -179,7 +179,8 @@ int kvm_mips_handle_commpage_tlb_fault(unsigned long badvaddr, pfn = CPHYSADDR(vcpu->arch.kseg0_commpage) >> PAGE_SHIFT; pair_idx = (badvaddr >> PAGE_SHIFT) & 1; entrylo[pair_idx] = mips3_paddr_to_tlbpfn(pfn << PAGE_SHIFT) | - (0x3 << ENTRYLO_C_SHIFT) | ENTRYLO_D | ENTRYLO_V; + ((_page_cachable_default >> _CACHE_SHIFT) << ENTRYLO_C_SHIFT) | + ENTRYLO_D | ENTRYLO_V; local_irq_save(flags); |