Re: Is espfix64's double-fault thing OK on Xen?
From: H. Peter Anvin
Date: Mon Jul 14 2014 - 18:23:32 EST
On 07/14/2014 02:35 PM, Andy Lutomirski wrote:
> Presumably the problem is here:
> pushq $0
> 1: jmp hypercall_iret
> This seems rather unlikely to work on the espfix stack.
> Maybe espfix64 should be disabled when running on Xen and Xen should
> implement its own espfix64 in the hypervisor.
Perhaps the first question is: is espfix even necessary on Xen? How
does the Xen PV IRET handle returning to a 16-bit stack segment?
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/