On Thu, Feb 16, 2023 at 01:49:39AM +0000, Edgecombe, Rick P wrote: > On Tue, 2023-02-14 at 02:48 +0300, Kirill A. Shutemov wrote: > > TDX guests are not allowed to clear CR4.MCE. Attempt to clear it > > leads > > to #VE. > > > > Preserve the flag during kexec. > > > > Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> > > I wonder whats going on with the pre-existing switching between eax and > rax in this code for the cr0 and cr4 manipulations. Do you know what > the reason is? 32-bit ORs and ANDs save one byte per instruction. And there's no 32-bit MOV to/from control registers in 64-bit mode. > > Also, for a simple non-tdx kexec regression test: > Tested-by: Rick Edgecombe <rick.p.edgecombe@xxxxxxxxx> Thanks! -- Kiryl Shutsemau / Kirill A. Shutemov _______________________________________________ kexec mailing list kexec@xxxxxxxxxxxxxxxxxxx http://lists.infradead.org/mailman/listinfo/kexec
