On Wed, Aug 09, 2017 at 01:17:54PM -0500, Tom Lendacky wrote:
> Ok, finally got around to running a 32-bit kernel and it reports
> x86_phys_bits as 48.
So it doesn't really matter on 32-bit. I guess you could add a comment
saying why we don't care.
Thanks.
--
Regards/Gruss,
Boris.
SUSE Lin
On 7/25/2017 10:33 AM, Borislav Petkov wrote:
On Tue, Jul 25, 2017 at 10:29:40AM -0500, Tom Lendacky wrote:
But early_identify_cpu() calls get_cpu_cap() which will check for cpuid
leaf 0x8008 support and set x86_phys_bits.
Right, but it can't be less than 32, can it? And if it is more than
On Tue, Jul 25, 2017 at 10:29:40AM -0500, Tom Lendacky wrote:
> But early_identify_cpu() calls get_cpu_cap() which will check for cpuid
> leaf 0x8008 support and set x86_phys_bits.
Right, but it can't be less than 32, can it? And if it is more than 32
bits, then it probably doesn't really matt
On 7/25/2017 10:13 AM, Borislav Petkov wrote:
On Tue, Jul 25, 2017 at 09:58:54AM -0500, Tom Lendacky wrote:
True, but it is more about being accurate and making sure the value is
correct where ever it may be used.
So early_identify_cpu() initializes phys_bits to 32 on 32-bit.
Subtracting it th
On Tue, Jul 25, 2017 at 09:58:54AM -0500, Tom Lendacky wrote:
> True, but it is more about being accurate and making sure the value is
> correct where ever it may be used.
So early_identify_cpu() initializes phys_bits to 32 on 32-bit.
Subtracting it there would actually make actively it wrong, AFA
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
On 7/25/2017 5:26 AM, Borislav Petkov wrote:
On Mon, Jul 24, 2017 at 02:07:42PM -0500, Brijesh Singh wrote:
From: Tom Lendacky
Update the CPU features to include identifying and reporting on the
Secure Encrypted Virtualization (SEV) feature. SME is identified by
CPUID 0x801f, but requires
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 log
On Mon, Jul 24, 2017 at 02:07:42PM -0500, Brijesh Singh wrote:
> From: Tom Lendacky
>
> Update the CPU features to include identifying and reporting on the
> Secure Encrypted Virtualization (SEV) feature. SME is identified by
> CPUID 0x801f, but requires BIOS support to enable it (set bit 23
From: Tom Lendacky
Update the CPU features to include identifying and reporting on the
Secure Encrypted Virtualization (SEV) feature. SME is identified by
CPUID 0x801f, but requires BIOS support to enable it (set bit 23 of
MSR_K8_SYSCFG and set bit 0 of MSR_K7_HWCR). Only show the SEV featu
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