Messages in this thread | | | Date | Fri, 15 Jan 2021 14:39:24 +0100 | From | Borislav Petkov <> | Subject | Re: [PATCH v3 05/21] x86/fpu/xstate: Add a new variable to indicate dynamic user states |
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On Wed, Dec 23, 2020 at 07:57:01AM -0800, Chang S. Bae wrote: > The perf has a buffer that is allocated on demand. The states saved in the
What's "the perf"? I hope to find out when I countinue reading...
> buffer were named as 'dynamic' (supervisor) states but the buffer is not > updated in every context switch. > > The context switch buffer is in preparation to be dynamic for user states. > Make the wording to differentiate between those 'dynamic' states. > > Add a new variable -- xfeatures_mask_user_dynamic to indicate the dynamic > user states, and rename some define and helper as related to the dynamic > supervisor states: > xfeatures_mask_supervisor_dynamic() > XFEATURE_MASK_SUPERVISOR_DYNAMIC > > No functional change.
Text needs cleaning up.
> Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com> > Reviewed-by: Len Brown <len.brown@intel.com> > Cc: x86@kernel.org > Cc: linux-kernel@vger.kernel.org > --- > Changes from v2: > * Updated the changelog for clarification. > --- > arch/x86/include/asm/fpu/xstate.h | 12 +++++++----- > arch/x86/kernel/fpu/xstate.c | 29 +++++++++++++++++++---------- > 2 files changed, 26 insertions(+), 15 deletions(-) > > diff --git a/arch/x86/include/asm/fpu/xstate.h b/arch/x86/include/asm/fpu/xstate.h > index 24bf8d3f559a..6ce8350672c2 100644 > --- a/arch/x86/include/asm/fpu/xstate.h > +++ b/arch/x86/include/asm/fpu/xstate.h > @@ -56,7 +56,7 @@ > * - Don't set the bit corresponding to the dynamic supervisor feature in > * IA32_XSS at run time, since it has been set at boot time. > */ > -#define XFEATURE_MASK_DYNAMIC (XFEATURE_MASK_LBR) > +#define XFEATURE_MASK_SUPERVISOR_DYNAMIC (XFEATURE_MASK_LBR)
Is XFEATURE_MASK_USER_DYNAMIC coming too?
-- Regards/Gruss, Boris.
SUSE Software Solutions Germany GmbH, GF: Felix Imendörffer, HRB 36809, AG Nürnberg
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