From: Juergen Gross Date: Mon, 3 Jul 2023 13:00:32 +0000 (+0200) Subject: x86/xen: Fix secondary processors' FPU initialization X-Git-Tag: v6.1.52~663 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=7f3982de36c6620c2faae6fd960fa4021d71e16a;p=platform%2Fkernel%2Flinux-starfive.git x86/xen: Fix secondary processors' FPU initialization commit fe3e0a13e597c1c8617814bf9b42ab732db5c26e upstream. Moving the call of fpu__init_cpu() from cpu_init() to start_secondary() broke Xen PV guests, as those don't call start_secondary() for APs. Call fpu__init_cpu() in Xen's cpu_bringup(), which is the Xen PV replacement of start_secondary(). Fixes: b81fac906a8f ("x86/fpu: Move FPU initialization into arch_cpu_finalize_init()") Signed-off-by: Juergen Gross Signed-off-by: Borislav Petkov (AMD) Reviewed-by: Boris Ostrovsky Acked-by: Thomas Gleixner Link: https://lore.kernel.org/r/20230703130032.22916-1-jgross@suse.com Signed-off-by: Greg Kroah-Hartman --- diff --git a/arch/x86/xen/smp_pv.c b/arch/x86/xen/smp_pv.c index 6175f2c..e97bab7 100644 --- a/arch/x86/xen/smp_pv.c +++ b/arch/x86/xen/smp_pv.c @@ -63,6 +63,7 @@ static void cpu_bringup(void) cr4_init(); cpu_init(); + fpu__init_cpu(); touch_softlockup_watchdog(); /* PVH runs in ring 0 and allows us to do native syscalls. Yay! */