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riscv: hwprobe: export Zawrs ISA extension

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Export Zawrs ISA extension through hwprobe.

[Palmer: there's a gap in the numbers here as there will be a merge
conflict when this is picked up.  To avoid confusion I just set the
hwprobe ID to match what it would be post-merge.]

Signed-off-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Clément Léger <cleger@rivosinc.com>
Link: https://lore.kernel.org/r/20240426100820.14762-12-ajones@ventanamicro.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Andrew Jones 2024-04-26 12:08:24 +02:00 committed by Palmer Dabbelt
parent b8ddb0df30
commit 244c18fbf6
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3 changed files with 6 additions and 0 deletions
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4
Documentation/arch/riscv/hwprobe.rst
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@ -188,6 +188,10 @@ The following keys are defined:
manual starting from commit 95cf1f9 ("Add changes requested by Ved
during signoff")
* :c:macro:`RISCV_HWPROBE_EXT_ZAWRS`: The Zawrs extension is supported as
ratified in commit 98918c844281 ("Merge pull request #1217 from
riscv/zawrs") of riscv-isa-manual.
* :c:macro:`RISCV_HWPROBE_KEY_CPUPERF_0`: A bitmask that contains performance
information about the selected set of processors.

1
arch/riscv/include/uapi/asm/hwprobe.h
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@ -59,6 +59,7 @@ struct riscv_hwprobe {
#define RISCV_HWPROBE_EXT_ZTSO (1ULL << 33)
#define RISCV_HWPROBE_EXT_ZACAS (1ULL << 34)
#define RISCV_HWPROBE_EXT_ZICOND (1ULL << 35)
#define RISCV_HWPROBE_EXT_ZAWRS (1ULL << 48)
#define RISCV_HWPROBE_KEY_CPUPERF_0 5
#define RISCV_HWPROBE_MISALIGNED_UNKNOWN (0 << 0)
#define RISCV_HWPROBE_MISALIGNED_EMULATED (1 << 0)

1
arch/riscv/kernel/sys_hwprobe.c
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@ -111,6 +111,7 @@ static void hwprobe_isa_ext0(struct riscv_hwprobe *pair,
EXT_KEY(ZTSO);
EXT_KEY(ZACAS);
EXT_KEY(ZICOND);
EXT_KEY(ZAWRS);
if (has_vector()) {
EXT_KEY(ZVBB);