Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-02 17:11:33 +00:00
Code Issues Packages Projects Releases Wiki Activity

PPC KVM fixes for 4.19

Browse Source 
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.
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v2
 
 iQEcBAABCAAGBQJbfVFcAAoJEJ2a6ncsY3GfwAcH/i4BDNm5bSXLbCZv1Zqc9iWM
 ZqCNSlx9fuR5z+Bl3FWvm14CqfG7JFMd1pVXVD3AEGN6nv0mtLPotmoaw+BUWXIP
 aD3BRIBSfOVHj90CiWJ1pqZGzE49vAKrjUGocuqHhBiqGjYmnnE7QKgD+lQ13SND
 LWDV3XaQgoO9+NZdqtV6hsWMmKCmXWIHykkG9H+EVkD+341e2EBQf6r83qibAGz4
 U5SHkr/3JqL8oC7RJixT8CS/dV5qCgmuL8Vs5NYDTUnc6DmKhdes2s7OiugK7nHg
 twKe8K0aRVowmTA8yIwEN22OeH1FAUmYDClkgHozHFWyD2+u7O9kLrAYZxEN9Q4=
 =61nR
 -----END PGP SIGNATURE-----

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 pp, key;
unsigned long v, orig_v, gr; unsigned long v, orig_v, gr;
__be64 *hptep; __be64 *hptep;
int index; long int index;
int virtmode = vcpu->arch.shregs.msr & (data ? MSR_DR : MSR_IR); int virtmode = vcpu->arch.shregs.msr & (data ? MSR_DR : MSR_IR);
if (kvm_is_radix(vcpu->kvm)) 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); gpa, shift);
kvmppc_radix_tlbie_page(kvm, gpa, shift); kvmppc_radix_tlbie_page(kvm, gpa, shift);
if ((old & _PAGE_DIRTY) && memslot->dirty_bitmap) { if ((old & _PAGE_DIRTY) && memslot->dirty_bitmap) {
unsigned long npages = 1; unsigned long psize = PAGE_SIZE;
if (shift) if (shift)
npages = 1ul << (shift - PAGE_SHIFT); psize = 1ul << shift;
kvmppc_update_dirty_map(memslot, gfn, npages); kvmppc_update_dirty_map(memslot, gfn, psize);
} }
} }
return 0; return 0;