TWxSoftware/twx-linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

riscv: sbi: add Firmware Feature (FWFT) SBI extensions definitions

Browse Source 
The Firmware Features extension (FWFT) was added as part of the SBI 3.0
specification. Add SBI definitions to use this extension.

Signed-off-by: Clément Léger <cleger@rivosinc.com>
Reviewed-by: Samuel Holland <samuel.holland@sifive.com>
Tested-by: Samuel Holland <samuel.holland@sifive.com>
Reviewed-by: Deepak Gupta <debug@rivosinc.com>
Reviewed-by: Andrew Jones <ajones@ventanamicro.com>
Reviewed-by: Atish Patra <atishp@rivosinc.com>
Link: https://lore.kernel.org/r/20250523101932.1594077-2-cleger@rivosinc.com
Signed-off-by: Palmer Dabbelt <palmer@dabbelt.com>
This commit is contained in:
Clément Léger
2025-05-23 12:19:18 +02:00
committed by Palmer Dabbelt
parent 82f2b0b97b
commit cf8651f731
1 changed files with 33 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
arch/riscv/include/asm/sbi.h
+33
View File
@@ -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,
@@ -402,6 +403,33 @@ 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_POINTER_MASKING_PMLEN = 0x5,
SBI_FWFT_LOCAL_RESERVED_START = 0x6,
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_PLATFORM_FEATURE_BIT BIT(30)
#define SBI_FWFT_GLOBAL_FEATURE_BIT BIT(31)
#define SBI_FWFT_SET_FLAG_LOCK BIT(0)
/* SBI spec version fields */
#define SBI_SPEC_VERSION_DEFAULT 0x1
#define SBI_SPEC_VERSION_MAJOR_SHIFT 24
@@ -419,6 +447,11 @@ enum sbi_ext_nacl_feature {
#define SBI_ERR_ALREADY_STARTED -7
#define SBI_ERR_ALREADY_STOPPED -8
#define SBI_ERR_NO_SHMEM -9
#define SBI_ERR_INVALID_STATE -10
#define SBI_ERR_BAD_RANGE -11
#define SBI_ERR_TIMEOUT -12
#define SBI_ERR_IO -13
#define SBI_ERR_DENIED_LOCKED -14
extern unsigned long sbi_spec_version;
struct sbiret {