Re: [PATCH v2 07/14] LoongArch: Implement ARCH_HAS_KERNEL_FPU_SUPPORT

[PATCH v2 00/14] Unified cross-architecture kernel-mode FPU API · Samuel Holland <samuel.holland@sifive.com> · 2023-12-28
[PATCH v2 01/14] arch: Add ARCH_HAS_KERNEL_FPU_SUPPORT · Samuel Holland <samuel.holland@sifive.com> · 2023-12-28
Re: [PATCH v2 01/14] arch: Add ARCH_HAS_KERNEL_FPU_SUPPORT · Christoph Hellwig <hch@lst.de> · 2023-12-28
[PATCH v2 02/14] ARM: Implement ARCH_HAS_KERNEL_FPU_SUPPORT · Samuel Holland <samuel.holland@sifive.com> · 2023-12-28
[PATCH v2 04/14] arm64: Implement ARCH_HAS_KERNEL_FPU_SUPPORT · Samuel Holland <samuel.holland@sifive.com> · 2023-12-28
[PATCH v2 03/14] ARM: crypto: Use CC_FLAGS_FPU for NEON CFLAGS · Samuel Holland <samuel.holland@sifive.com> · 2023-12-28
[PATCH v2 05/14] arm64: crypto: Use CC_FLAGS_FPU for NEON CFLAGS · Samuel Holland <samuel.holland@sifive.com> · 2023-12-28
Re: [PATCH v2 05/14] arm64: crypto: Use CC_FLAGS_FPU for NEON CFLAGS · Christoph Hellwig <hch@lst.de> · 2023-12-28
[PATCH v2 06/14] lib/raid6: Use CC_FLAGS_FPU for NEON CFLAGS · Samuel Holland <samuel.holland@sifive.com> · 2023-12-28
[PATCH v2 07/14] LoongArch: Implement ARCH_HAS_KERNEL_FPU_SUPPORT · Samuel Holland <samuel.holland@sifive.com> · 2023-12-28
Re: [PATCH v2 07/14] LoongArch: Implement ARCH_HAS_KERNEL_FPU_SUPPORT · Huacai Chen <chenhuacai@kernel.org> · 2024-01-04
Re: [PATCH v2 07/14] LoongArch: Implement ARCH_HAS_KERNEL_FPU_SUPPORT · Samuel Holland <samuel.holland@sifive.com> · 2024-01-04
Re: [PATCH v2 07/14] LoongArch: Implement ARCH_HAS_KERNEL_FPU_SUPPORT · Huacai Chen <chenhuacai@kernel.org> · 2024-01-07
Re: [PATCH v2 07/14] LoongArch: Implement ARCH_HAS_KERNEL_FPU_SUPPORT · Christoph Hellwig <hch@infradead.org> · 2024-01-08
[PATCH v2 08/14] powerpc: Implement ARCH_HAS_KERNEL_FPU_SUPPORT · Samuel Holland <samuel.holland@sifive.com> · 2023-12-28
Re: [PATCH v2 08/14] powerpc: Implement ARCH_HAS_KERNEL_FPU_SUPPORT · Michael Ellerman <mpe@ellerman.id.au> · 2023-12-28
[PATCH v2 09/14] x86: Implement ARCH_HAS_KERNEL_FPU_SUPPORT · Samuel Holland <samuel.holland@sifive.com> · 2023-12-28
[PATCH v2 10/14] riscv: Add support for kernel-mode FPU · Samuel Holland <samuel.holland@sifive.com> · 2023-12-28
Re: [PATCH v2 10/14] riscv: Add support for kernel-mode FPU · Christoph Hellwig <hch@lst.de> · 2023-12-28
Re: [PATCH v2 10/14] riscv: Add support for kernel-mode FPU · Palmer Dabbelt <palmer@dabbelt.com> · 2024-01-10
[PATCH v2 11/14] drm/amd/display: Only use hard-float, not altivec on powerpc · Samuel Holland <samuel.holland@sifive.com> · 2023-12-28
[PATCH v2 12/14] drm/amd/display: Use ARCH_HAS_KERNEL_FPU_SUPPORT · Samuel Holland <samuel.holland@sifive.com> · 2023-12-28
Re: [PATCH v2 12/14] drm/amd/display: Use ARCH_HAS_KERNEL_FPU_SUPPORT · Christoph Hellwig <hch@lst.de> · 2023-12-28
[PATCH v2 13/14] selftests/fpu: Move FP code to a separate translation unit · Samuel Holland <samuel.holland@sifive.com> · 2023-12-28
Re: [PATCH v2 13/14] selftests/fpu: Move FP code to a separate translation unit · Christoph Hellwig <hch@lst.de> · 2023-12-28
[PATCH v2 14/14] selftests/fpu: Allow building on other architectures · Samuel Holland <samuel.holland@sifive.com> · 2023-12-28
Re: [PATCH v2 00/14] Unified cross-architecture kernel-mode FPU API · Alex Deucher <hidden> · 2024-01-03

From: Christoph Hellwig <hch@infradead.org>
Date: 2024-01-08 09:37:12
Also in: amd-gfx, linux-arch, linux-arm-kernel, linux-riscv, lkml, loongarch

On Sun, Jan 07, 2024 at 10:39:07AM +0800, Huacai Chen wrote:

quoted

Do you mean that LoongArch32 does not support double-precision FP in hardware?
At least both of the consumers in this series use double-precision, so my first
thought is that LoongArch32 could not select ARCH_HAS_KERNEL_FPU_SUPPORT.

Then is it possible to introduce CC_FLAGS_SP_FPU and CC_FLAGS_DP_FPU?
I think there may be some place where SP FP is enough.

Let's defer that until it is actually neeed.

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