On Mon, Oct 12, 2026 at 10:03 PM Simon Glass <[email protected]> wrote: > > On 2026-10-11T07:05:58, Bin Meng <[email protected]> wrote: > > x86: cpu: Use native_cpuid() in cpuid_ext() > > > > cpuid_ext() saves and restores EBX with 32-bit moves, which clear the > > upper half of RBX in long mode. The assembly does not declare RBX as > > an output, so the compiler cannot account for this change. > > > > Initialize the leaf and subleaf in cpuid_result and use native_cpuid(), > > which declares all four output registers and lets the compiler preserve > > RBX correctly. Keep the structure-returning interface for callers. > > > > Signed-off-by: Bin Meng <[email protected]> > > > > arch/x86/include/asm/cpu.h | 35 +++++++++++++++-------------------- > > 1 file changed, 15 insertions(+), 20 deletions(-) > > Reviewed-by: Simon Glass <[email protected]>
applied to u-boot-x86, thanks!
