Messages in this thread | | | Date | Tue, 7 May 2024 17:19:07 -0700 | From | Ashok Raj <> | Subject | Re: [PATCH v2 2/2] platform/x86/intel/ifs: Initialize AMX state for the scan test |
| |
On Tue, May 07, 2024 at 04:53:44PM -0700, Bae, Chang Seok wrote: > In-Field Scan aborts if AMX state is not in initialized state. Use > kernel_fpu_begin_mask(KFPU_AMX) to ensure AMX state is initialized. > > Introduce custom FPU handling wrappers to ensure compliance with the > established FPU API semantics. This change follows the EFI case from > commit b0dc553cfc9d ("x86/fpu: Make the EFI FPU calling convention > explicit"). > > Then, use these wrappers to surround the MSR_ACTIVATE_SCAN write to > minimize the critical section. To prevent unnecessary delays, invoke > ifs_fpu_begin() before entering the rendezvous loop. > > Signed-off-by: Chang S. Bae <chang.seok.bae@intel.com> > Reviewed-by: Jithu Joseph <jithu.joseph@intel.com> > Tested-by: Jithu Joseph <jithu.joseph@intel.com> > Acked-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Ashok Raj <ashok.raj@intel.com>
for both patches.
| |