Export Zca, Zcf, Zcd and Zcb ISA extension through hwprobe.
Signed-off-by: Clément Léger <cleger@xxxxxxxxxxxx>
Reviewed-by: Charlie Jenkins <charlie@xxxxxxxxxxxx>
---
Documentation/arch/riscv/hwprobe.rst | 20 ++++++++++++++++++++
arch/riscv/include/uapi/asm/hwprobe.h | 4 ++++
arch/riscv/kernel/sys_hwprobe.c | 4 ++++
3 files changed, 28 insertions(+)
diff --git a/Documentation/arch/riscv/hwprobe.rst b/Documentation/arch/riscv/hwprobe.rst
index 2b7f1d05b2e3..4d9b4ed34c96 100644
--- a/Documentation/arch/riscv/hwprobe.rst
+++ b/Documentation/arch/riscv/hwprobe.rst
@@ -211,6 +211,26 @@ The following keys are defined:
supported as defined in the RISC-V ISA manual starting from commit
58220614a5f ("Zimop is ratified/1.0").
+ * :c:macro:`RISCV_HWPROBE_EXT_ZCA`: The Zca extension part of Zc* standard
+ extensions for code size reduction, as ratified in commit 8be3419c1c0
+ ("Zcf doesn't exist on RV64 as it contains no instructions") of
+ riscv-code-size-reduction.
+
+ * :c:macro:`RISCV_HWPROBE_EXT_ZCB`: The Zcb extension part of Zc* standard
+ extensions for code size reduction, as ratified in commit 8be3419c1c0
+ ("Zcf doesn't exist on RV64 as it contains no instructions") of
+ riscv-code-size-reduction.
+
+ * :c:macro:`RISCV_HWPROBE_EXT_ZCD`: The Zcd extension part of Zc* standard
+ extensions for code size reduction, as ratified in commit 8be3419c1c0
+ ("Zcf doesn't exist on RV64 as it contains no instructions") of
+ riscv-code-size-reduction.
+
+ * :c:macro:`RISCV_HWPROBE_EXT_ZCF`: The Zcf extension part of Zc* standard
+ extensions for code size reduction, as ratified in commit 8be3419c1c0
+ ("Zcf doesn't exist on RV64 as it contains no instructions") of
+ riscv-code-size-reduction.
+
* :c:macro:`RISCV_HWPROBE_KEY_CPUPERF_0`: A bitmask that contains performance
information about the selected set of processors.
diff --git a/arch/riscv/include/uapi/asm/hwprobe.h b/arch/riscv/include/uapi/asm/hwprobe.h
index 538c404938e6..c38f3f2b8382 100644
--- a/arch/riscv/include/uapi/asm/hwprobe.h
+++ b/arch/riscv/include/uapi/asm/hwprobe.h
@@ -66,6 +66,10 @@ struct riscv_hwprobe {
#define RISCV_HWPROBE_EXT_ZVE64F (1ULL << 40)
#define RISCV_HWPROBE_EXT_ZVE64D (1ULL << 41)
#define RISCV_HWPROBE_EXT_ZIMOP (1ULL << 42)
+#define RISCV_HWPROBE_EXT_ZCA (1ULL << 43)
+#define RISCV_HWPROBE_EXT_ZCB (1ULL << 44)
+#define RISCV_HWPROBE_EXT_ZCD (1ULL << 45)
+#define RISCV_HWPROBE_EXT_ZCF (1ULL << 46)
#define RISCV_HWPROBE_KEY_CPUPERF_0 5
#define RISCV_HWPROBE_MISALIGNED_UNKNOWN (0 << 0)
#define RISCV_HWPROBE_MISALIGNED_EMULATED (1 << 0)
diff --git a/arch/riscv/kernel/sys_hwprobe.c b/arch/riscv/kernel/sys_hwprobe.c
index 04a2ed4ee415..89e03cdf38b7 100644
--- a/arch/riscv/kernel/sys_hwprobe.c
+++ b/arch/riscv/kernel/sys_hwprobe.c
@@ -113,6 +113,8 @@ static void hwprobe_isa_ext0(struct riscv_hwprobe *pair,
EXT_KEY(ZICOND);
EXT_KEY(ZIHINTPAUSE);
EXT_KEY(ZIMOP);
+ EXT_KEY(ZCA);
+ EXT_KEY(ZCB);
/*
* All the following extensions must depend on the kernel
@@ -142,6 +144,8 @@ static void hwprobe_isa_ext0(struct riscv_hwprobe *pair,
EXT_KEY(ZFH);
EXT_KEY(ZFHMIN);
EXT_KEY(ZFA);
+ EXT_KEY(ZCD);
+ EXT_KEY(ZCF);
}
#undef EXT_KEY
}
--
2.45.2
