Messages in this thread | | | Subject | Re: [PATCH 1/3] x86/xen: Avoid fast syscall path for Xen PV guests | From | Boris Ostrovsky <> | Date | Wed, 18 Nov 2015 17:05:23 -0500 |
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On 11/18/2015 03:58 PM, Andy Lutomirski wrote: > On Wed, Nov 18, 2015 at 12:50 PM, Brian Gerst <brgerst@gmail.com> wrote: >> >> Can you just add !xen_pv_domain() to the opportunistic SYSRET check >> instead? Bury the alternatives in that macro, ie. >> static_cpu_has(X86_FEATURE_XENPV). That would likely benefit other >> code as well. > We could, but that won't help the 64-bit case where we want to keep > the full asm path.
I don't think I understand what you mean here. Which full asm path?
-boris
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