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| author | Juergen Gross <jgross@suse.com> | 2023-07-03 15:00:32 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2023-08-08 20:04:51 +0200 |
| commit | 2f94fb4a4231a5dbde14a7493983649310a80cc2 (patch) | |
| tree | b14dc7a9efa7187195bf5ab1355d8236440de639 | |
| parent | 6a592d977a0d4c73969ebde4b9693b335ab73d6d (diff) | |
| download | linux-stable-2f94fb4a4231a5dbde14a7493983649310a80cc2.tar.gz linux-stable-2f94fb4a4231a5dbde14a7493983649310a80cc2.tar.bz2 linux-stable-2f94fb4a4231a5dbde14a7493983649310a80cc2.zip | |
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>
| -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 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! */ |