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authorJuergen Gross <jgross@suse.com>2023-07-03 16:00:32 +0300
committerBorislav Petkov (AMD) <bp@alien8.de>2023-07-05 12:44:16 +0300
commitfe3e0a13e597c1c8617814bf9b42ab732db5c26e (patch)
tree1fc0917b110b62465de17039177b67f07b2831f6 /arch
parent0303c9729afc4094ef53e552b7b8cff7436028d6 (diff)
downloadlinux-fe3e0a13e597c1c8617814bf9b42ab732db5c26e.tar.xz
x86/xen: Fix secondary processors' FPU initialization
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 <jgross@suse.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Acked-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20230703130032.22916-1-jgross@suse.com
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/xen/smp_pv.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/xen/smp_pv.c b/arch/x86/xen/smp_pv.c
index a9cf8c8fa074..0b6efc43faaf 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! */