| Date | Tue, 22 Jun 2021 16:30:45 +0200 | From | Borislav Petkov <> | Subject | Re: [patch V3 43/66] x86/pkru: Provide pkru_write_default() |
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On Fri, Jun 18, 2021 at 04:19:06PM +0200, Thomas Gleixner wrote: > Provide a simple and trivial helper which just writes the PKRU default > value without trying to fiddle with the tasks xsave buffer.
task's
> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> > --- > arch/x86/include/asm/pkru.h | 8 ++++++++ > 1 file changed, 8 insertions(+) > > --- a/arch/x86/include/asm/pkru.h > +++ b/arch/x86/include/asm/pkru.h > @@ -60,4 +60,12 @@ static inline void write_pkru(u32 pkru) > fpregs_unlock(); > } > > +static inline void pkru_write_default(void) > +{ > + if (!cpu_feature_enabled(X86_FEATURE_OSPKE)) > + return; > + > + wrpkru(pkru_get_init_value()); > +} > + > #endif
Reviewed-by: Borislav Petkov <bp@suse.de>
-- Regards/Gruss, Boris.
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