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https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
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a5ea53da65
Add a new hwprobe key "RISCV_HWPROBE_KEY_VENDOR_EXT_THEAD_0" which allows userspace to probe for the new RISCV_ISA_VENDOR_EXT_XTHEADVECTOR vendor extension. This new key will allow userspace code to probe for which thead vendor extensions are supported. This API is modeled to be consistent with RISCV_HWPROBE_KEY_IMA_EXT_0. The bitmask returned will have each bit corresponding to a supported thead vendor extension of the cpumask set. Just like RISCV_HWPROBE_KEY_IMA_EXT_0, this allows a userspace program to determine all of the supported thead vendor extensions in one call. Signed-off-by: Charlie Jenkins <charlie@rivosinc.com> Reviewed-by: Evan Green <evan@rivosinc.com> Tested-by: Yangyu Chen <cyy@cyyself.name> Link: https://lore.kernel.org/r/20241113-xtheadvector-v11-10-236c22791ef9@rivosinc.com Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
20 lines
537 B
C
20 lines
537 B
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <asm/vendor_extensions/thead.h>
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#include <asm/vendor_extensions/thead_hwprobe.h>
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#include <asm/vendor_extensions/vendor_hwprobe.h>
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#include <linux/cpumask.h>
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#include <linux/types.h>
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#include <uapi/asm/hwprobe.h>
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#include <uapi/asm/vendor/thead.h>
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void hwprobe_isa_vendor_ext_thead_0(struct riscv_hwprobe *pair, const struct cpumask *cpus)
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{
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VENDOR_EXTENSION_SUPPORTED(pair, cpus,
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riscv_isa_vendor_ext_list_thead.per_hart_isa_bitmap, {
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VENDOR_EXT_KEY(XTHEADVECTOR);
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});
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}
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