2023-04-28 19:25:17

by Evan Green

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Subject: [PATCH 1/3] RISC-V: Add Zba extension probing

---

Add the Zba address bit manipulation extension into those the kernel is
aware of and maintains in its riscv_isa bitmap.

Signed-off-by: Evan Green <[email protected]>
---

arch/riscv/include/asm/hwcap.h | 1 +
arch/riscv/kernel/cpu.c | 1 +
arch/riscv/kernel/cpufeature.c | 1 +
3 files changed, 3 insertions(+)

diff --git a/arch/riscv/include/asm/hwcap.h b/arch/riscv/include/asm/hwcap.h
index 9af793970855..fa36db9281ab 100644
--- a/arch/riscv/include/asm/hwcap.h
+++ b/arch/riscv/include/asm/hwcap.h
@@ -44,6 +44,7 @@
#define RISCV_ISA_EXT_ZIHINTPAUSE 32
#define RISCV_ISA_EXT_SVNAPOT 33
#define RISCV_ISA_EXT_ZICBOZ 34
+#define RISCV_ISA_EXT_ZBA 35

#define RISCV_ISA_EXT_MAX 64
#define RISCV_ISA_EXT_NAME_LEN_MAX 32
diff --git a/arch/riscv/kernel/cpu.c b/arch/riscv/kernel/cpu.c
index 3df38052dcbd..2f85b1656557 100644
--- a/arch/riscv/kernel/cpu.c
+++ b/arch/riscv/kernel/cpu.c
@@ -184,6 +184,7 @@ static struct riscv_isa_ext_data isa_ext_arr[] = {
__RISCV_ISA_EXT_DATA(zicbom, RISCV_ISA_EXT_ZICBOM),
__RISCV_ISA_EXT_DATA(zicboz, RISCV_ISA_EXT_ZICBOZ),
__RISCV_ISA_EXT_DATA(zihintpause, RISCV_ISA_EXT_ZIHINTPAUSE),
+ __RISCV_ISA_EXT_DATA(zba, RISCV_ISA_EXT_ZBA),
__RISCV_ISA_EXT_DATA(zbb, RISCV_ISA_EXT_ZBB),
__RISCV_ISA_EXT_DATA(sscofpmf, RISCV_ISA_EXT_SSCOFPMF),
__RISCV_ISA_EXT_DATA(sstc, RISCV_ISA_EXT_SSTC),
diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c
index 52585e088873..1a80474e308e 100644
--- a/arch/riscv/kernel/cpufeature.c
+++ b/arch/riscv/kernel/cpufeature.c
@@ -233,6 +233,7 @@ void __init riscv_fill_hwcap(void)
SET_ISA_EXT_MAP("svinval", RISCV_ISA_EXT_SVINVAL);
SET_ISA_EXT_MAP("svnapot", RISCV_ISA_EXT_SVNAPOT);
SET_ISA_EXT_MAP("svpbmt", RISCV_ISA_EXT_SVPBMT);
+ SET_ISA_EXT_MAP("zba", RISCV_ISA_EXT_ZBA);
SET_ISA_EXT_MAP("zbb", RISCV_ISA_EXT_ZBB);
SET_ISA_EXT_MAP("zicbom", RISCV_ISA_EXT_ZICBOM);
SET_ISA_EXT_MAP("zicboz", RISCV_ISA_EXT_ZICBOZ);
--
2.25.1

2023-04-29 13:46:34

by Conor Dooley

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Subject: Re: [PATCH 1/3] RISC-V: Add Zba extension probing

---

Reviewed-by: Conor Dooley <[email protected]>

---

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2023-04-29 20:08:11

by Palmer Dabbelt

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Subject: Re: [PATCH 1/3] RISC-V: Add Zba extension probing

---

On Fri, 28 Apr 2023 12:06:06 PDT (-0700), Evan Green wrote:
> Add the Zba address bit manipulation extension into those the kernel is
> aware of and maintains in its riscv_isa bitmap.
>
> Signed-off-by: Evan Green <[email protected]>
> ---
>
> arch/riscv/include/asm/hwcap.h | 1 +
> arch/riscv/kernel/cpu.c | 1 +
> arch/riscv/kernel/cpufeature.c | 1 +
> 3 files changed, 3 insertions(+)
>
> diff --git a/arch/riscv/include/asm/hwcap.h b/arch/riscv/include/asm/hwcap.h
> index 9af793970855..fa36db9281ab 100644
> --- a/arch/riscv/include/asm/hwcap.h
> +++ b/arch/riscv/include/asm/hwcap.h
> @@ -44,6 +44,7 @@
> #define RISCV_ISA_EXT_ZIHINTPAUSE 32
> #define RISCV_ISA_EXT_SVNAPOT 33
> #define RISCV_ISA_EXT_ZICBOZ 34
> +#define RISCV_ISA_EXT_ZBA 35
>
> #define RISCV_ISA_EXT_MAX 64
> #define RISCV_ISA_EXT_NAME_LEN_MAX 32
> diff --git a/arch/riscv/kernel/cpu.c b/arch/riscv/kernel/cpu.c
> index 3df38052dcbd..2f85b1656557 100644
> --- a/arch/riscv/kernel/cpu.c
> +++ b/arch/riscv/kernel/cpu.c
> @@ -184,6 +184,7 @@ static struct riscv_isa_ext_data isa_ext_arr[] = {
> __RISCV_ISA_EXT_DATA(zicbom, RISCV_ISA_EXT_ZICBOM),
> __RISCV_ISA_EXT_DATA(zicboz, RISCV_ISA_EXT_ZICBOZ),
> __RISCV_ISA_EXT_DATA(zihintpause, RISCV_ISA_EXT_ZIHINTPAUSE),
> + __RISCV_ISA_EXT_DATA(zba, RISCV_ISA_EXT_ZBA),
> __RISCV_ISA_EXT_DATA(zbb, RISCV_ISA_EXT_ZBB),
> __RISCV_ISA_EXT_DATA(sscofpmf, RISCV_ISA_EXT_SSCOFPMF),
> __RISCV_ISA_EXT_DATA(sstc, RISCV_ISA_EXT_SSTC),
> diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c
> index 52585e088873..1a80474e308e 100644
> --- a/arch/riscv/kernel/cpufeature.c
> +++ b/arch/riscv/kernel/cpufeature.c
> @@ -233,6 +233,7 @@ void __init riscv_fill_hwcap(void)
> SET_ISA_EXT_MAP("svinval", RISCV_ISA_EXT_SVINVAL);
> SET_ISA_EXT_MAP("svnapot", RISCV_ISA_EXT_SVNAPOT);
> SET_ISA_EXT_MAP("svpbmt", RISCV_ISA_EXT_SVPBMT);
> + SET_ISA_EXT_MAP("zba", RISCV_ISA_EXT_ZBA);
> SET_ISA_EXT_MAP("zbb", RISCV_ISA_EXT_ZBB);
> SET_ISA_EXT_MAP("zicbom", RISCV_ISA_EXT_ZICBOM);
> SET_ISA_EXT_MAP("zicboz", RISCV_ISA_EXT_ZICBOZ);

Reviewed-by: Palmer Dabbelt <[email protected]>