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[v3,2/8] RISC-V: Detect AIA CSRs from ISA string

Message ID 20230403093310.2271142-3-apatel@ventanamicro.com (mailing list archive)
State New, archived
Headers show
Series RISC-V KVM virtualize AIA CSRs | expand

Commit Message

Anup Patel April 3, 2023, 9:33 a.m. UTC 
We have two extension names for AIA ISA support: Smaia (M-mode AIA CSRs)
and Ssaia (S-mode AIA CSRs).

We extend the ISA string parsing to detect Smaia and Ssaia extensions.

Signed-off-by: Anup Patel <apatel@ventanamicro.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
---
 arch/riscv/include/asm/hwcap.h | 2 ++
 arch/riscv/kernel/cpu.c        | 2 ++
 arch/riscv/kernel/cpufeature.c | 2 ++
 3 files changed, 6 insertions(+)

Comments

Conor Dooley April 3, 2023, 9:39 a.m. UTC | #1 
On Mon, Apr 03, 2023 at 03:03:04PM +0530, Anup Patel wrote:

> diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c
> index 59d58ee0f68d..1b13a5823b90 100644
> --- a/arch/riscv/kernel/cpufeature.c
> +++ b/arch/riscv/kernel/cpufeature.c
> @@ -221,8 +221,10 @@ void __init riscv_fill_hwcap(void)
>  				}
>  			} else {
>  				/* sorted alphabetically */
                                   ^^^^^^^^^^^^^^^^^^^^^

> +				SET_ISA_EXT_MAP("ssaia", RISCV_ISA_EXT_SSAIA);
>  				SET_ISA_EXT_MAP("sscofpmf", RISCV_ISA_EXT_SSCOFPMF);
>  				SET_ISA_EXT_MAP("sstc", RISCV_ISA_EXT_SSTC);
> +				SET_ISA_EXT_MAP("smaia", RISCV_ISA_EXT_SMAIA);

This entry has been added in an incorrect order chief :/

>  				SET_ISA_EXT_MAP("svinval", RISCV_ISA_EXT_SVINVAL);
>  				SET_ISA_EXT_MAP("svpbmt", RISCV_ISA_EXT_SVPBMT);
>  				SET_ISA_EXT_MAP("zbb", RISCV_ISA_EXT_ZBB);
Anup Patel April 3, 2023, 12:05 p.m. UTC | #2 
On Mon, Apr 3, 2023 at 3:10 PM Conor Dooley <conor.dooley@microchip.com> wrote:
>
> On Mon, Apr 03, 2023 at 03:03:04PM +0530, Anup Patel wrote:
>
> > diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c
> > index 59d58ee0f68d..1b13a5823b90 100644
> > --- a/arch/riscv/kernel/cpufeature.c
> > +++ b/arch/riscv/kernel/cpufeature.c
> > @@ -221,8 +221,10 @@ void __init riscv_fill_hwcap(void)
> >                               }
> >                       } else {
> >                               /* sorted alphabetically */
>                                    ^^^^^^^^^^^^^^^^^^^^^
>
> > +                             SET_ISA_EXT_MAP("ssaia", RISCV_ISA_EXT_SSAIA);
> >                               SET_ISA_EXT_MAP("sscofpmf", RISCV_ISA_EXT_SSCOFPMF);
> >                               SET_ISA_EXT_MAP("sstc", RISCV_ISA_EXT_SSTC);
> > +                             SET_ISA_EXT_MAP("smaia", RISCV_ISA_EXT_SMAIA);
>
> This entry has been added in an incorrect order chief :/

Okay, I will update in the next revision.

>
> >                               SET_ISA_EXT_MAP("svinval", RISCV_ISA_EXT_SVINVAL);
> >                               SET_ISA_EXT_MAP("svpbmt", RISCV_ISA_EXT_SVPBMT);
> >                               SET_ISA_EXT_MAP("zbb", RISCV_ISA_EXT_ZBB);

Regards,
Anup
diff mbox series

Patch

diff --git a/arch/riscv/include/asm/hwcap.h b/arch/riscv/include/asm/hwcap.h
index 6263a0de1c6a..9c8ae4399565 100644
--- a/arch/riscv/include/asm/hwcap.h
+++ b/arch/riscv/include/asm/hwcap.h
@@ -42,6 +42,8 @@ 
 #define RISCV_ISA_EXT_ZBB		30
 #define RISCV_ISA_EXT_ZICBOM		31
 #define RISCV_ISA_EXT_ZIHINTPAUSE	32
+#define RISCV_ISA_EXT_SSAIA		33
+#define RISCV_ISA_EXT_SMAIA		34
 
 #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 8400f0cc9704..7d20036bcc6c 100644
--- a/arch/riscv/kernel/cpu.c
+++ b/arch/riscv/kernel/cpu.c
@@ -188,8 +188,10 @@  static struct riscv_isa_ext_data isa_ext_arr[] = {
 	__RISCV_ISA_EXT_DATA(zicbom, RISCV_ISA_EXT_ZICBOM),
 	__RISCV_ISA_EXT_DATA(zihintpause, RISCV_ISA_EXT_ZIHINTPAUSE),
 	__RISCV_ISA_EXT_DATA(zbb, RISCV_ISA_EXT_ZBB),
+	__RISCV_ISA_EXT_DATA(ssaia, RISCV_ISA_EXT_SSAIA),
 	__RISCV_ISA_EXT_DATA(sscofpmf, RISCV_ISA_EXT_SSCOFPMF),
 	__RISCV_ISA_EXT_DATA(sstc, RISCV_ISA_EXT_SSTC),
+	__RISCV_ISA_EXT_DATA(smaia, RISCV_ISA_EXT_SMAIA),
 	__RISCV_ISA_EXT_DATA(svinval, RISCV_ISA_EXT_SVINVAL),
 	__RISCV_ISA_EXT_DATA(svpbmt, RISCV_ISA_EXT_SVPBMT),
 	__RISCV_ISA_EXT_DATA("", RISCV_ISA_EXT_MAX),
diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c
index 59d58ee0f68d..1b13a5823b90 100644
--- a/arch/riscv/kernel/cpufeature.c
+++ b/arch/riscv/kernel/cpufeature.c
@@ -221,8 +221,10 @@  void __init riscv_fill_hwcap(void)
 				}
 			} else {
 				/* sorted alphabetically */
+				SET_ISA_EXT_MAP("ssaia", RISCV_ISA_EXT_SSAIA);
 				SET_ISA_EXT_MAP("sscofpmf", RISCV_ISA_EXT_SSCOFPMF);
 				SET_ISA_EXT_MAP("sstc", RISCV_ISA_EXT_SSTC);
+				SET_ISA_EXT_MAP("smaia", RISCV_ISA_EXT_SMAIA);
 				SET_ISA_EXT_MAP("svinval", RISCV_ISA_EXT_SVINVAL);
 				SET_ISA_EXT_MAP("svpbmt", RISCV_ISA_EXT_SVPBMT);
 				SET_ISA_EXT_MAP("zbb", RISCV_ISA_EXT_ZBB);