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Thu, 24 Apr 2025 00:21:34 -0700 (PDT) From: Deepak Gupta Date: Thu, 24 Apr 2025 00:20:37 -0700 Subject: [PATCH v13 22/28] riscv: Add Firmware Feature SBI extensions definitions MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Message-Id: <20250424-v5_user_cfi_series-v13-22-971437de586a@rivosinc.com> References: <20250424-v5_user_cfi_series-v13-0-971437de586a@rivosinc.com> In-Reply-To: <20250424-v5_user_cfi_series-v13-0-971437de586a@rivosinc.com> To: Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H. Peter Anvin" , Andrew Morton , "Liam R. Howlett" , Vlastimil Babka , Lorenzo Stoakes , Paul Walmsley , Palmer Dabbelt , Albert Ou , Conor Dooley , Rob Herring , Krzysztof Kozlowski , Arnd Bergmann , Christian Brauner , Peter Zijlstra , Oleg Nesterov , Eric Biederman , Kees Cook , Jonathan Corbet , Shuah Khan , Jann Horn , Conor Dooley , Miguel Ojeda , Alex Gaynor , Boqun Feng , Gary Guo , =?utf-8?q?Bj=C3=B6rn_Roy_Baron?= , Benno Lossin , Andreas Hindborg , Alice Ryhl , Trevor Gross Cc: linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, linux-riscv@lists.infradead.org, devicetree@vger.kernel.org, linux-arch@vger.kernel.org, linux-doc@vger.kernel.org, linux-kselftest@vger.kernel.org, alistair.francis@wdc.com, richard.henderson@linaro.org, jim.shu@sifive.com, andybnac@gmail.com, kito.cheng@sifive.com, charlie@rivosinc.com, atishp@rivosinc.com, evan@rivosinc.com, cleger@rivosinc.com, alexghiti@rivosinc.com, samitolvanen@google.com, broonie@kernel.org, rick.p.edgecombe@intel.com, rust-for-linux@vger.kernel.org, Zong Li X-Mailer: b4 0.13.0 X-Rspamd-Server: rspam12 X-Rspamd-Queue-Id: F2DFB180008 X-Rspam-User: X-Stat-Signature: 5nm8qfgqd89oa73yttamo3zwt33a3ipq X-HE-Tag: 1745479295-94453 X-HE-Meta: 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 MM6xtHeG 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: From: Clément Léger Add necessary SBI definitions to use the FWFT extension. Signed-off-by: Clément Léger Reviewed-by: Zong Li --- 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 -- 2.43.0