Re: [PATCH 1/3] arm64: cpufeature: Fix the type of no FP/SIMD capability

On Tue, Oct 15, 2019 at 12:30:15PM +0200, Ard Biesheuvel wrote: > On Tue, 15 Oct 2019 at 12:25, Dave Martin wrote: > > > > On Mon, Oct 14, 2019 at 06:57:30PM +0200, Ard Biesheuvel wrote: [...] > > > All in-kernel NEON code checks whether the NEON is usable, so I'd > > > expect that check to retu

Re: [PATCH 1/3] arm64: cpufeature: Fix the type of no FP/SIMD capability

On Tue, 15 Oct 2019 at 15:03, Suzuki K Poulose wrote: > > > > On 15/10/2019 11:30, Ard Biesheuvel wrote: > > On Tue, 15 Oct 2019 at 12:25, Dave Martin wrote: > >> > >> On Mon, Oct 14, 2019 at 06:57:30PM +0200, Ard Biesheuvel wrote: > >>> On Mon, 14 Oct 2019 at 17:50, Dave P Martin wrote: >

Re: [PATCH 1/3] arm64: cpufeature: Fix the type of no FP/SIMD capability

On 15/10/2019 11:30, Ard Biesheuvel wrote: On Tue, 15 Oct 2019 at 12:25, Dave Martin wrote: On Mon, Oct 14, 2019 at 06:57:30PM +0200, Ard Biesheuvel wrote: On Mon, 14 Oct 2019 at 17:50, Dave P Martin wrote: On Mon, Oct 14, 2019 at 04:45:40PM +0100, Suzuki K Poulose wrote: On 14/10/20

Re: [PATCH 1/3] arm64: cpufeature: Fix the type of no FP/SIMD capability

On Tue, 15 Oct 2019 at 12:25, Dave Martin wrote: > > On Mon, Oct 14, 2019 at 06:57:30PM +0200, Ard Biesheuvel wrote: > > On Mon, 14 Oct 2019 at 17:50, Dave P Martin wrote: > > > > > > On Mon, Oct 14, 2019 at 04:45:40PM +0100, Suzuki K Poulose wrote: > > > > > > > > > > > > On 14/10/2019 15:52, Da

Re: [PATCH 1/3] arm64: cpufeature: Fix the type of no FP/SIMD capability

On Mon, Oct 14, 2019 at 06:57:30PM +0200, Ard Biesheuvel wrote: > On Mon, 14 Oct 2019 at 17:50, Dave P Martin wrote: > > > > On Mon, Oct 14, 2019 at 04:45:40PM +0100, Suzuki K Poulose wrote: > > > > > > > > > On 14/10/2019 15:52, Dave Martin wrote: > > > > On Fri, Oct 11, 2019 at 06:28:43PM +0100,

Re: [PATCH 1/3] arm64: cpufeature: Fix the type of no FP/SIMD capability

On Tue, 15 Oct 2019 at 11:44, Suzuki K Poulose wrote: > > > > On 14/10/2019 17:57, Ard Biesheuvel wrote: > > On Mon, 14 Oct 2019 at 17:50, Dave P Martin wrote: > >> > >> On Mon, Oct 14, 2019 at 04:45:40PM +0100, Suzuki K Poulose wrote: > >>> > >>> > >>> On 14/10/2019 15:52, Dave Martin wrote: > >

Re: [PATCH 1/3] arm64: cpufeature: Fix the type of no FP/SIMD capability

On 14/10/2019 17:57, Ard Biesheuvel wrote: On Mon, 14 Oct 2019 at 17:50, Dave P Martin wrote: On Mon, Oct 14, 2019 at 04:45:40PM +0100, Suzuki K Poulose wrote: On 14/10/2019 15:52, Dave Martin wrote: On Fri, Oct 11, 2019 at 06:28:43PM +0100, Suzuki K Poulose wrote: On 11/10/2019 15:2

Re: [PATCH 1/3] arm64: cpufeature: Fix the type of no FP/SIMD capability

On Mon, 14 Oct 2019 at 17:50, Dave P Martin wrote: > > On Mon, Oct 14, 2019 at 04:45:40PM +0100, Suzuki K Poulose wrote: > > > > > > On 14/10/2019 15:52, Dave Martin wrote: > > > On Fri, Oct 11, 2019 at 06:28:43PM +0100, Suzuki K Poulose wrote: > > >> > > >> > > >> On 11/10/2019 15:21, Dave Martin

Re: [PATCH 1/3] arm64: cpufeature: Fix the type of no FP/SIMD capability

On Mon, Oct 14, 2019 at 04:45:40PM +0100, Suzuki K Poulose wrote: > > > On 14/10/2019 15:52, Dave Martin wrote: > > On Fri, Oct 11, 2019 at 06:28:43PM +0100, Suzuki K Poulose wrote: > >> > >> > >> On 11/10/2019 15:21, Dave Martin wrote: > >>> On Fri, Oct 11, 2019 at 01:13:18PM +0100, Suzuki K Poulo

Re: [PATCH 1/3] arm64: cpufeature: Fix the type of no FP/SIMD capability

On 14/10/2019 15:52, Dave Martin wrote: On Fri, Oct 11, 2019 at 06:28:43PM +0100, Suzuki K Poulose wrote: On 11/10/2019 15:21, Dave Martin wrote: On Fri, Oct 11, 2019 at 01:13:18PM +0100, Suzuki K Poulose wrote: > Hi Dave On 11/10/2019 12:36, Dave Martin wrote: On Thu, Oct 10, 2019 at 0

Re: [PATCH 1/3] arm64: cpufeature: Fix the type of no FP/SIMD capability

On Fri, Oct 11, 2019 at 06:28:43PM +0100, Suzuki K Poulose wrote: > > > On 11/10/2019 15:21, Dave Martin wrote: > >On Fri, Oct 11, 2019 at 01:13:18PM +0100, Suzuki K Poulose wrote: > Hi Dave > >> > >>On 11/10/2019 12:36, Dave Martin wrote: > >>>On Thu, Oct 10, 2019 at 06:15:15PM +0100, Suzuki K P

Re: [PATCH 1/3] arm64: cpufeature: Fix the type of no FP/SIMD capability

On 11/10/2019 15:21, Dave Martin wrote: On Fri, Oct 11, 2019 at 01:13:18PM +0100, Suzuki K Poulose wrote: > Hi Dave On 11/10/2019 12:36, Dave Martin wrote: On Thu, Oct 10, 2019 at 06:15:15PM +0100, Suzuki K Poulose wrote: The NO_FPSIMD capability is defined with scope SYSTEM, which implies

Re: [PATCH 1/3] arm64: cpufeature: Fix the type of no FP/SIMD capability

On Fri, Oct 11, 2019 at 01:13:18PM +0100, Suzuki K Poulose wrote: > Hi Dave > > On 11/10/2019 12:36, Dave Martin wrote: > >On Thu, Oct 10, 2019 at 06:15:15PM +0100, Suzuki K Poulose wrote: > >>The NO_FPSIMD capability is defined with scope SYSTEM, which implies > >>that the "absence" of FP/SIMD on

Re: [PATCH 1/3] arm64: cpufeature: Fix the type of no FP/SIMD capability

Hi Dave On 11/10/2019 12:36, Dave Martin wrote: On Thu, Oct 10, 2019 at 06:15:15PM +0100, Suzuki K Poulose wrote: The NO_FPSIMD capability is defined with scope SYSTEM, which implies that the "absence" of FP/SIMD on at least one CPU is detected only after all the SMP CPUs are brought up. Howeve

Re: [PATCH 1/3] arm64: cpufeature: Fix the type of no FP/SIMD capability

On Thu, Oct 10, 2019 at 06:15:15PM +0100, Suzuki K Poulose wrote: > The NO_FPSIMD capability is defined with scope SYSTEM, which implies > that the "absence" of FP/SIMD on at least one CPU is detected only > after all the SMP CPUs are brought up. However, we use the status > of this capability for

[PATCH 1/3] arm64: cpufeature: Fix the type of no FP/SIMD capability

The NO_FPSIMD capability is defined with scope SYSTEM, which implies that the "absence" of FP/SIMD on at least one CPU is detected only after all the SMP CPUs are brought up. However, we use the status of this capability for every context switch. So, let us change the scop to LOCAL_CPU to allow the