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KVM: x86: handle idiv overflow at kvm_write_tsc
authorMarcelo Tosatti <mtosatti@redhat.com>
Wed, 12 Jun 2013 02:31:12 +0000 (23:31 -0300)
committerGleb Natapov <gleb@redhat.com>
Wed, 12 Jun 2013 11:24:11 +0000 (14:24 +0300)
commit8915aa27d5efbb9185357175b0acf884325565f9
tree1ff764deecb8f617e74579c46341dce7682ff615tree | snapshot
parent05988d728dcd962d50374e4e63171324163005b6commit | diff
KVM: x86: handle idiv overflow at kvm_write_tsc

Its possible that idivl overflows (due to large delta stored in usdiff,
valid scenario).

Create an exception handler to catch the overflow exception (division by zero
is protected by vcpu->arch.virtual_tsc_khz check), and interpret it accordingly
(delta is larger than USEC_PER_SEC).

Fixes https://bugzilla.redhat.com/show_bug.cgi?id=969644

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
arch/x86/kvm/x86.c diff | blob | history
Domain: System / Kernel;