[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] Re: [Xen-devel] [PATCH] x86/HVM: 32-bit IN result must be zero-extended to 64 bits (part 2)
On 13/11/2013 17:09, "Jan Beulich" <JBeulich@xxxxxxxx> wrote: > Just spotted a counterpart of what commit 9d89100b (same title) dealt > with. > > Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx> Acked-by: Keir Fraser <keir@xxxxxxx> > --- 2013-10-16.orig/xen/arch/x86/hvm/io.c 2013-11-13 17:45:16.000000000 +0100 > +++ 2013-10-16/xen/arch/x86/hvm/io.c 2013-11-13 17:47:47.000000000 +0100 > @@ -290,8 +290,10 @@ void hvm_io_assist(void) > (void)handle_mmio(); > break; > case HVMIO_handle_pio_awaiting_completion: > - memcpy(&guest_cpu_user_regs()->eax, > - &p->data, vio->io_size); > + if ( vio->io_size == 4 ) /* Needs zero extension. */ > + guest_cpu_user_regs()->rax = (uint32_t)p->data; > + else > + memcpy(&guest_cpu_user_regs()->rax, &p->data, vio->io_size); > break; > default: > break; > > > > _______________________________________________ > Xen-devel mailing list > Xen-devel@xxxxxxxxxxxxx > http://lists.xen.org/xen-devel _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxx http://lists.xen.org/xen-devel
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