On 7/25/2017 9:36 AM, Borislav Petkov wrote:
On Tue, Jul 25, 2017 at 09:29:40AM -0500, Tom Lendacky wrote:
Yup, we can do something like that. I believe the only change that
would be needed to your patch would be to move the IS_ENABLED() check
to after the physical address space reduction check.
Yeah, I wasn't sure about that. The logic is that if BIOS has enabled
SME and thus reduction is in place, we need to update x86_phys_bits on
32-bit regardless, right?
But, come to think of it, that reduction won't have any effect since we
have 32-bit addresses and the reduction is above 32-bits, right? And
thus it is moot.
True, but it is more about being accurate and making sure the value is
correct where ever it may be used.
Thanks,
Tom
Or?
