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| author | Nadav Amit | 2015-01-26 08:32:26 +0100 |
|---|---|---|
| committer | Paolo Bonzini | 2015-01-26 12:15:18 +0100 |
| commit | bac155310be35e0fa64b066d47625d2a12a75122 (patch) | |
| tree | 14dd9f7eae1b56432132c6d89c30eeb4b9f846b6 /arch/x86/kvm/x86.c | |
| parent | KVM: x86: Fix defines in emulator.c (diff) | |
| download | kernel-qcow2-linux-bac155310be35e0fa64b066d47625d2a12a75122.tar.gz kernel-qcow2-linux-bac155310be35e0fa64b066d47625d2a12a75122.tar.xz kernel-qcow2-linux-bac155310be35e0fa64b066d47625d2a12a75122.zip | |
KVM: x86: 32-bit wraparound read/write not emulated correctly
If we got a wraparound of 32-bit operand, and the limit is 0xffffffff, read and
writes should be successful. It just needs to be done in two segments.
Signed-off-by: Nadav Amit <namit@cs.technion.ac.il>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index cdd6606e4c54..1e10e3f7f516 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -4495,6 +4495,8 @@ int emulator_read_write(struct x86_emulate_ctxt *ctxt, unsigned long addr, if (rc != X86EMUL_CONTINUE) return rc; addr += now; + if (ctxt->mode != X86EMUL_MODE_PROT64) + addr = (u32)addr; val += now; bytes -= now; } |