Hi Christoph,
On 2023-11-22 2:33 AM, Christoph Hellwig wrote:
> On Tue, Nov 21, 2023 at 07:05:13PM -0800, Samuel Holland wrote:
>> +static inline void kernel_fpu_begin(void)
>> +{
>> +preempt_disable();
>> +fstate_save(current, task_pt_regs(current));
>> +csr_set(CSR_SSTATUS, SR_FS);
>
patch link:
https://lore.kernel.org/r/20231122030621.3759313-2-samuel.holland%40sifive.com
patch subject: [PATCH 1/3] riscv: Add support for kernel-mode FPU
config: riscv-randconfig-r111-20231123
(https://download.01.org/0day-ci/archive/20231123/202311230628.tkl31mjj-...@intel.com/config)
compiler: ris
patch link:
https://lore.kernel.org/r/20231122030621.3759313-2-samuel.holland%40sifive.com
patch subject: [PATCH 1/3] riscv: Add support for kernel-mode FPU
config: riscv-allnoconfig
(https://download.01.org/0day-ci/archive/20231123/202311230215.dbfywpqb-...@intel.com/config)
compiler: clang vers
This is needed to support recent hardware in the amdgpu DRM driver. The
FPU code in that driver is not performance-critical, so only provide the
minimal support.
Signed-off-by: Samuel Holland
---
arch/riscv/include/asm/switch_to.h | 14 ++
arch/riscv/kernel/process.c| 3 +++
On Tue, Nov 21, 2023 at 07:05:13PM -0800, Samuel Holland wrote:
> +static inline void kernel_fpu_begin(void)
> +{
> + preempt_disable();
> + fstate_save(current, task_pt_regs(current));
> + csr_set(CSR_SSTATUS, SR_FS);
> +}
> +
> +static inline void kernel_fpu_end(void)
> +{
> + csr
