Messages in this thread | | | Date | Mon, 29 Jan 2018 03:59:27 -0800 | From | Matthew Wilcox <> | Subject | Re: [PATCH] x86/kexec: Make kexec work in 5-level paging mode |
| |
On Mon, Jan 29, 2018 at 02:08:45PM +0300, Kirill A. Shutemov wrote: > I've missed that we need to change relocate_kernel() to set CR4.LA57 > flag if the kernel has 5-level paging enabled. > > I avoided to use ifdef CONFIG_X86_5LEVEL here and inferred if we need to > enabled 5-level paging from previous CR4 value. This way the code is > ready for boot-time switching between paging modes.
Forgive me if I'm missing something ... can you kexec a 5-level kernel from a 4-level kernel or vice versa?
| |