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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 19:57:38 +0200 |
| commit | 583016037a092e4189c86bad7946c6d88669b4ca (patch) | |
| tree | 1bb4fbe7f66275bb8fc47afb8bce83ba0d4f6b7d | |
| parent | eb13cce488745176db654b20ea438f4b5b91ab9c (diff) | |
| download | linux-583016037a092e4189c86bad7946c6d88669b4ca.tar.gz linux-583016037a092e4189c86bad7946c6d88669b4ca.tar.bz2 linux-583016037a092e4189c86bad7946c6d88669b4ca.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 | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/xen/smp_pv.c b/arch/x86/xen/smp_pv.c index 64873937cd1d..755e939db3ed 100644 --- a/arch/x86/xen/smp_pv.c +++ b/arch/x86/xen/smp_pv.c @@ -30,6 +30,7 @@ #include <asm/desc.h> #include <asm/cpu.h> #include <asm/io_apic.h> +#include <asm/fpu/internal.h> #include <xen/interface/xen.h> #include <xen/interface/vcpu.h> @@ -63,6 +64,7 @@ static void cpu_bringup(void) cr4_init(); cpu_init(); + fpu__init_cpu(); touch_softlockup_watchdog(); preempt_disable(); |