On Mon, Mar 10, 2025 at 11:42 PM Deepak Gupta debug@rivosinc.com wrote:
From: Clément Léger cleger@rivosinc.com
Add necessary SBI definitions to use the FWFT extension.
Signed-off-by: Clément Léger cleger@rivosinc.com
arch/riscv/include/asm/sbi.h | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+)
diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h index 3d250824178b..23bfb254e3f4 100644 --- a/arch/riscv/include/asm/sbi.h +++ b/arch/riscv/include/asm/sbi.h @@ -35,6 +35,7 @@ enum sbi_ext_id { SBI_EXT_DBCN = 0x4442434E, SBI_EXT_STA = 0x535441, SBI_EXT_NACL = 0x4E41434C,
SBI_EXT_FWFT = 0x46574654, /* Experimentals extensions must lie within this range */ SBI_EXT_EXPERIMENTAL_START = 0x08000000,@@ -401,6 +402,31 @@ enum sbi_ext_nacl_feature {
#define SBI_NACL_SHMEM_SRET_X(__i) ((__riscv_xlen / 8) * (__i)) #define SBI_NACL_SHMEM_SRET_X_LAST 31 +/* SBI function IDs for FW feature extension */ +#define SBI_EXT_FWFT_SET 0x0 +#define SBI_EXT_FWFT_GET 0x1
+enum sbi_fwft_feature_t {
SBI_FWFT_MISALIGNED_EXC_DELEG = 0x0,SBI_FWFT_LANDING_PAD = 0x1,SBI_FWFT_SHADOW_STACK = 0x2,SBI_FWFT_DOUBLE_TRAP = 0x3,SBI_FWFT_PTE_AD_HW_UPDATING = 0x4,SBI_FWFT_LOCAL_RESERVED_START = 0x5,SBI_FWFT_LOCAL_RESERVED_END = 0x3fffffff,SBI_FWFT_LOCAL_PLATFORM_START = 0x40000000,SBI_FWFT_LOCAL_PLATFORM_END = 0x7fffffff,SBI_FWFT_GLOBAL_RESERVED_START = 0x80000000,SBI_FWFT_GLOBAL_RESERVED_END = 0xbfffffff,SBI_FWFT_GLOBAL_PLATFORM_START = 0xc0000000,SBI_FWFT_GLOBAL_PLATFORM_END = 0xffffffff,+};
+#define SBI_FWFT_GLOBAL_FEATURE_BIT (1 << 31) +#define SBI_FWFT_PLATFORM_FEATURE_BIT (1 << 30)
+#define SBI_FWFT_SET_FLAG_LOCK (1 << 0)
/* SBI spec version fields */ #define SBI_SPEC_VERSION_DEFAULT 0x1
LGTM.
Reviewed-by: Zong Li zong.li@sifive.com
-- 2.34.1
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