Re: [PATCH 1/3] x86_64: further cleanup of 32-bit compat syscallmechanisms

[H. Peter Anvin]

Jeremy Fitzhardinge wrote:
> AMD only supports "syscall" from 32-bit compat usermode.
> Intel and Centaur(?) only support "sysenter" from 32-bit compat usermode.
>
> Set the X86 feature bits accordingly, and set up the vdso in
> accordance with those bits.  On the offchance we run on in a 64-bit
> environment which supports neither syscall nor sysenter from 32-bit
> mode, then fall back to the int $0x80 vdso.
>
> Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@xxxxxxxxxx>

Acked-by: H. Peter Anvin <hpa@xxxxxxxxx>

	-hpa

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