On 2/6/19 5:52 AM, Kirill A. Shutemov wrote:
> RDMSR in the trampoline code overrides EDX, but we use the register to
> indicate if 5-level paging has to enabled. It leads to failure to boot
> on a 5-level paging machine.
>
> Preserve EDX on the stack while we are dealing with EFER.
>
> Signed
On Wed, Feb 06, 2019 at 06:47:57PM +0300, Kirill A. Shutemov wrote:
> What about this:
Yap, thanks!
--
Regards/Gruss,
Boris.
Good mailing practices for 400: avoid top-posting and trim the reply.
On Wed, Feb 06, 2019 at 03:21:41PM +, Borislav Petkov wrote:
> On Wed, Feb 06, 2019 at 02:52:53PM +0300, Kirill A. Shutemov wrote:
> > RDMSR in the trampoline code overrides EDX, but we use the register to
> > indicate if 5-level paging has to enabled. It leads to failure to boot
> > on a 5-lev
On Wed, Feb 06, 2019 at 02:52:53PM +0300, Kirill A. Shutemov wrote:
> RDMSR in the trampoline code overrides EDX, but we use the register to
> indicate if 5-level paging has to enabled. It leads to failure to boot
> on a 5-level paging machine.
>
> Preserve EDX on the stack while we are dealing wi
RDMSR in the trampoline code overrides EDX, but we use the register to
indicate if 5-level paging has to enabled. It leads to failure to boot
on a 5-level paging machine.
Preserve EDX on the stack while we are dealing with EFER.
Signed-off-by: Kirill A. Shutemov
Fixes: b677dfae5aa1 ("x86/boot/co
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