diff options
| author | Juergen Gross <jgross@suse.com> | 2023-07-03 15:00:32 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-08-08 20:03:49 +0200 |
| commit | 7f3982de36c6620c2faae6fd960fa4021d71e16a (patch) | |
| tree | 75b912969d209ccce0ad7cec8b031817fe38d3a3 /arch/x86 | |
| parent | baa7b7501e41344f95da0bd3042dd04110d58edb (diff) | |
| download | linux-7f3982de36c6620c2faae6fd960fa4021d71e16a.tar.gz | |
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 <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
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/xen/smp_pv.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/xen/smp_pv.c b/arch/x86/xen/smp_pv.c index 6175f2c5c822..e97bab7b0010 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! */ |