| Message ID | 20241111132823.21658-1-frediano.ziglio@cloud.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | [v3] x86/boot: Setup correctly fs segment for bogus_real_magic | expand |
On 11.11.2024 14:28, Frediano Ziglio wrote: > bogus_real_magic code uses fs segment so it should be initialised. > > Fixes: d8c8fef09054 ("Provide basic Xen PM infrastructure") > Signed-off-by: Frediano Ziglio <frediano.ziglio@cloud.com> Reviewed-by: Jan Beulich <jbeulich@suse.com>
diff --git a/xen/arch/x86/boot/wakeup.S b/xen/arch/x86/boot/wakeup.S index 08447e1934..ff138314f5 100644 --- a/xen/arch/x86/boot/wakeup.S +++ b/xen/arch/x86/boot/wakeup.S @@ -77,8 +77,11 @@ check_vesaw: ret bogus_real_magic: + movw $0xb800, %ax + movw %ax, %fs +1: movw $0x0e00 + 'B', %fs:(0x12) - jmp bogus_real_magic + jmp 1b .align 4 real_magic: .long 0x12345678
bogus_real_magic code uses fs segment so it should be initialised. Fixes: d8c8fef09054 ("Provide basic Xen PM infrastructure") Signed-off-by: Frediano Ziglio <frediano.ziglio@cloud.com> --- Changes since v1: - added "Fixes" comment; - add initialisation, do not remove old one. Changes since v2: - move initialisation in bogus_real_magic. --- xen/arch/x86/boot/wakeup.S | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)