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| author | Uros Bizjak <ubizjak@gmail.com> | 2026-01-14 22:18:15 +0100 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2026-01-15 11:44:29 +0100 |
| commit | 31911d3c394d6556a67ff63cf0093049ef6dcdd7 (patch) | |
| tree | 023699fe35083bdd83395da2a4e0af73a14cded5 /rust/kernel/sync | |
| parent | baea32b242be8ff857cc27b910c6c325c24a7247 (diff) | |
x86/paravirt: Use XOR r32,r32 to clear register in pv_vcpu_is_preempted()
x86_64 zero extends 32bit operations, so for 64bit operands, XOR r32,r32 is
functionally equal to XOR r64,r64, but avoids a REX prefix byte when legacy
registers are used.
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Acked-by: Alexey Makhalov <alexey.makhalov@broadcom.com>
Link: https://patch.msgid.link/20260114211948.74774-2-ubizjak@gmail.com
Diffstat (limited to 'rust/kernel/sync')
0 files changed, 0 insertions, 0 deletions