[PATCH v7 26/32] riscv: Add Firmware Feature SBI extensions definitions

[Deepak Gupta]

From: Clément Léger <cle...@rivosinc.com>

Add necessary SBI definitions to use the FWFT extension.

Signed-off-by: Clément Léger <cle...@rivosinc.com>
---
 arch/riscv/include/asm/sbi.h | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/arch/riscv/include/asm/sbi.h b/arch/riscv/include/asm/sbi.h
index 98f631b051db..754e5cdabf46 100644
--- a/arch/riscv/include/asm/sbi.h
+++ b/arch/riscv/include/asm/sbi.h
@@ -34,6 +34,7 @@ enum sbi_ext_id {
        SBI_EXT_PMU = 0x504D55,
        SBI_EXT_DBCN = 0x4442434E,
        SBI_EXT_STA = 0x535441,
+       SBI_EXT_FWFT = 0x46574654,
 
        /* Experimentals extensions must lie within this range */
        SBI_EXT_EXPERIMENTAL_START = 0x08000000,
@@ -281,6 +282,32 @@ struct sbi_sta_struct {
 
 #define SBI_SHMEM_DISABLE              -1
 
+/* 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
 #define SBI_SPEC_VERSION_MAJOR_SHIFT   24

-- 
2.34.1