[Xen-devel] ioperm problem

[Pavel MatÄja <pavel@xxxxxxxxxx>]

Hi,
I'm trying to port AMD VGA passthru patch to the latest XEN and vanila kernel 
and I got SIGSEGV in

static void ati_hw_out(uint16_t hport, uint32_t data)
{
    ioperm(gfx_info.host_pio_base, gfx_info.pio_size, 1);    
    asm volatile ("out %1, %0"::"Nd"(hport),"a"(data));
    ioperm(gfx_info.host_pio_base, gfx_info.pio_size, 0);
}

I tried old 2.6.32 XEN kernel and there is no such problem.
It looks related to arch/x86/kernel/ioport.c but I'm not sure.
Is anyone here familiar with that code?
-- 
Pavel Mateja

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