On Wed, Jun 07, 2023 at 09:23:28AM +0200, Ard Biesheuvel wrote:
> Instead of pushing and popping %RSI several times to preserve the struct
> boot_params pointer across the execution of the startup code, move it
> into a callee save register before the first call into C, and copy it
> back when needed.
>
> Signed-off-by: Ard Biesheuvel <ardb@xxxxxxxxxx>
> ---
> arch/x86/boot/compressed/head_64.S | 34 +++++++-------------
> 1 file changed, 11 insertions(+), 23 deletions(-)
I like that.
We do a similar dance in arch/x86/kernel/head_64.S. Care to fix that
too, in a separate patch?
Thx.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
