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PPC KVM fixes for 4.19

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Two small fixes for KVM on POWER machines; one fixes a bug where pages
 might not get marked dirty, causing guest memory corruption on migration,
 and the other fixes a bug causing reads from guest memory to use the
 wrong guest real address for very large HPT guests (>256G of memory),
 leading to failures in instruction emulation.
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Merge tag 'kvm-ppc-fixes-4.19-1' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

PPC KVM fixes for 4.19

Two small fixes for KVM on POWER machines; one fixes a bug where pages
might not get marked dirty, causing guest memory corruption on migration,
and the other fixes a bug causing reads from guest memory to use the
wrong guest real address for very large HPT guests (>256G of memory),
leading to failures in instruction emulation.
This commit is contained in:
Radim Krčmář 2018-09-04 21:12:46 +02:00
commit 732b53146a
2 changed files with 4 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
arch/powerpc/kvm/book3s_64_mmu_hv.c
View File

@ -358,7 +358,7 @@ static int kvmppc_mmu_book3s_64_hv_xlate(struct kvm_vcpu *vcpu, gva_t eaddr,
unsigned long pp, key;
unsigned long v, orig_v, gr;
__be64 *hptep;
int index;
long int index;
int virtmode = vcpu->arch.shregs.msr & (data ? MSR_DR : MSR_IR);
if (kvm_is_radix(vcpu->kvm))

6
arch/powerpc/kvm/book3s_64_mmu_radix.c
View File

@ -725,10 +725,10 @@ int kvm_unmap_radix(struct kvm *kvm, struct kvm_memory_slot *memslot,
gpa, shift);
kvmppc_radix_tlbie_page(kvm, gpa, shift);
if ((old & _PAGE_DIRTY) && memslot->dirty_bitmap) {
unsigned long npages = 1;
unsigned long psize = PAGE_SIZE;
if (shift)
npages = 1ul << (shift - PAGE_SHIFT);
kvmppc_update_dirty_map(memslot, gfn, npages);
psize = 1ul << shift;
kvmppc_update_dirty_map(memslot, gfn, psize);
}
}
return 0;