| Message ID | 20230925133859.1735879-5-apatel@ventanamicro.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | KVM RISC-V Conditional Operations | expand |
On Mon, Sep 25, 2023 at 07:08:54PM +0530, Anup Patel wrote: > The RISC-V integer conditional (Zicond) operation extension defines > standard conditional arithmetic and conditional-select/move operations > which are inspired from the XVentanaCondOps extension. In fact, QEMU > RISC-V also has support for emulating Zicond extension. > > Let us detect Zicond extension from ISA string available through > DT or ACPI. > > Signed-off-by: Anup Patel <apatel@ventanamicro.com> > --- > arch/riscv/include/asm/hwcap.h | 1 + > arch/riscv/kernel/cpufeature.c | 1 + > 2 files changed, 2 insertions(+) > > diff --git a/arch/riscv/include/asm/hwcap.h b/arch/riscv/include/asm/hwcap.h > index b7efe9e2fa89..15bafc02ffd4 100644 > --- a/arch/riscv/include/asm/hwcap.h > +++ b/arch/riscv/include/asm/hwcap.h > @@ -60,6 +60,7 @@ > #define RISCV_ISA_EXT_ZIHPM 42 > #define RISCV_ISA_EXT_SMSTATEEN 43 > #define RISCV_ISA_EXT_XVENTANACONDOPS 44 > +#define RISCV_ISA_EXT_ZICOND 45 > > #define RISCV_ISA_EXT_MAX 64 > > diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c > index 3a31d34fe709..7f683916f2c2 100644 > --- a/arch/riscv/kernel/cpufeature.c > +++ b/arch/riscv/kernel/cpufeature.c > @@ -167,6 +167,7 @@ const struct riscv_isa_ext_data riscv_isa_ext[] = { > __RISCV_ISA_EXT_DATA(zicbom, RISCV_ISA_EXT_ZICBOM), > __RISCV_ISA_EXT_DATA(zicboz, RISCV_ISA_EXT_ZICBOZ), > __RISCV_ISA_EXT_DATA(zicntr, RISCV_ISA_EXT_ZICNTR), > + __RISCV_ISA_EXT_DATA(zicond, RISCV_ISA_EXT_ZICOND), > __RISCV_ISA_EXT_DATA(zicsr, RISCV_ISA_EXT_ZICSR), > __RISCV_ISA_EXT_DATA(zifencei, RISCV_ISA_EXT_ZIFENCEI), > __RISCV_ISA_EXT_DATA(zihintpause, RISCV_ISA_EXT_ZIHINTPAUSE), > -- > 2.34.1 > Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
diff --git a/arch/riscv/include/asm/hwcap.h b/arch/riscv/include/asm/hwcap.h index b7efe9e2fa89..15bafc02ffd4 100644 --- a/arch/riscv/include/asm/hwcap.h +++ b/arch/riscv/include/asm/hwcap.h @@ -60,6 +60,7 @@ #define RISCV_ISA_EXT_ZIHPM 42 #define RISCV_ISA_EXT_SMSTATEEN 43 #define RISCV_ISA_EXT_XVENTANACONDOPS 44 +#define RISCV_ISA_EXT_ZICOND 45 #define RISCV_ISA_EXT_MAX 64 diff --git a/arch/riscv/kernel/cpufeature.c b/arch/riscv/kernel/cpufeature.c index 3a31d34fe709..7f683916f2c2 100644 --- a/arch/riscv/kernel/cpufeature.c +++ b/arch/riscv/kernel/cpufeature.c @@ -167,6 +167,7 @@ const struct riscv_isa_ext_data riscv_isa_ext[] = { __RISCV_ISA_EXT_DATA(zicbom, RISCV_ISA_EXT_ZICBOM), __RISCV_ISA_EXT_DATA(zicboz, RISCV_ISA_EXT_ZICBOZ), __RISCV_ISA_EXT_DATA(zicntr, RISCV_ISA_EXT_ZICNTR), + __RISCV_ISA_EXT_DATA(zicond, RISCV_ISA_EXT_ZICOND), __RISCV_ISA_EXT_DATA(zicsr, RISCV_ISA_EXT_ZICSR), __RISCV_ISA_EXT_DATA(zifencei, RISCV_ISA_EXT_ZIFENCEI), __RISCV_ISA_EXT_DATA(zihintpause, RISCV_ISA_EXT_ZIHINTPAUSE),
The RISC-V integer conditional (Zicond) operation extension defines standard conditional arithmetic and conditional-select/move operations which are inspired from the XVentanaCondOps extension. In fact, QEMU RISC-V also has support for emulating Zicond extension. Let us detect Zicond extension from ISA string available through DT or ACPI. Signed-off-by: Anup Patel <apatel@ventanamicro.com> --- arch/riscv/include/asm/hwcap.h | 1 + arch/riscv/kernel/cpufeature.c | 1 + 2 files changed, 2 insertions(+)