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Howlett" , Samuel Holland , Andrew Jones Subject: [PATCH v3 16/22] riscv: alternative: Add an ALTERNATIVE_3 macro Date: Wed, 12 Nov 2025 17:45:29 -0800 Message-ID: <20251113014656.2605447-17-samuel.holland@sifive.com> X-Mailer: git-send-email 2.47.2 In-Reply-To: <20251113014656.2605447-1-samuel.holland@sifive.com> References: <20251113014656.2605447-1-samuel.holland@sifive.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" ALT_FIXUP_MT() is already using ALTERNATIVE_2(), but it needs to be extended to handle a fourth case. Add ALTERNATIVE_3(), which extends ALTERNATIVE_2() with another block of new content. Reviewed-by: Andrew Jones Signed-off-by: Samuel Holland --- (no changes since v2) Changes in v2: - Fix erroneously-escaped newline in assembly ALTERNATIVE_CFG_3 macro arch/riscv/include/asm/alternative-macros.h | 45 ++++++++++++++++++--- 1 file changed, 40 insertions(+), 5 deletions(-) diff --git a/arch/riscv/include/asm/alternative-macros.h b/arch/riscv/inclu= de/asm/alternative-macros.h index 9619bd5c8eba..e8bf384da5c2 100644 --- a/arch/riscv/include/asm/alternative-macros.h +++ b/arch/riscv/include/asm/alternative-macros.h @@ -50,8 +50,17 @@ ALT_NEW_CONTENT \vendor_id_2, \patch_id_2, \enable_2, "\new_c_2" .endm =20 +.macro ALTERNATIVE_CFG_3 old_c, new_c_1, vendor_id_1, patch_id_1, enable_1= , \ + new_c_2, vendor_id_2, patch_id_2, enable_2, \ + new_c_3, vendor_id_3, patch_id_3, enable_3 + ALTERNATIVE_CFG_2 "\old_c", "\new_c_1", \vendor_id_1, \patch_id_1, \enabl= e_1 \ + "\new_c_2", \vendor_id_2, \patch_id_2, \enable_2 + ALT_NEW_CONTENT \vendor_id_3, \patch_id_3, \enable_3, "\new_c_3" +.endm + #define __ALTERNATIVE_CFG(...) ALTERNATIVE_CFG __VA_ARGS__ #define __ALTERNATIVE_CFG_2(...) ALTERNATIVE_CFG_2 __VA_ARGS__ +#define __ALTERNATIVE_CFG_3(...) ALTERNATIVE_CFG_3 __VA_ARGS__ =20 #else /* !__ASSEMBLER__ */ =20 @@ -98,6 +107,13 @@ __ALTERNATIVE_CFG(old_c, new_c_1, vendor_id_1, patch_id_1, enable_1) \ ALT_NEW_CONTENT(vendor_id_2, patch_id_2, enable_2, new_c_2) =20 +#define __ALTERNATIVE_CFG_3(old_c, new_c_1, vendor_id_1, patch_id_1, enabl= e_1, \ + new_c_2, vendor_id_2, patch_id_2, enable_2, \ + new_c_3, vendor_id_3, patch_id_3, enable_3) \ + __ALTERNATIVE_CFG_2(old_c, new_c_1, vendor_id_1, patch_id_1, enable_1, \ + new_c_2, vendor_id_2, patch_id_2, enable_2) \ + ALT_NEW_CONTENT(vendor_id_3, patch_id_3, enable_3, new_c_3) + #endif /* __ASSEMBLER__ */ =20 #define _ALTERNATIVE_CFG(old_c, new_c, vendor_id, patch_id, CONFIG_k) \ @@ -108,6 +124,13 @@ __ALTERNATIVE_CFG_2(old_c, new_c_1, vendor_id_1, patch_id_1, IS_ENABLED(C= ONFIG_k_1), \ new_c_2, vendor_id_2, patch_id_2, IS_ENABLED(CONFIG_k_2)) =20 +#define _ALTERNATIVE_CFG_3(old_c, new_c_1, vendor_id_1, patch_id_1, CONFIG= _k_1, \ + new_c_2, vendor_id_2, patch_id_2, CONFIG_k_2, \ + new_c_3, vendor_id_3, patch_id_3, CONFIG_k_3) \ + __ALTERNATIVE_CFG_3(old_c, new_c_1, vendor_id_1, patch_id_1, IS_ENABLED(C= ONFIG_k_1), \ + new_c_2, vendor_id_2, patch_id_2, IS_ENABLED(CONFIG_k_2), \ + new_c_3, vendor_id_3, patch_id_3, IS_ENABLED(CONFIG_k_3)) + #else /* CONFIG_RISCV_ALTERNATIVE */ #ifdef __ASSEMBLER__ =20 @@ -118,11 +141,17 @@ #define __ALTERNATIVE_CFG(old_c, ...) ALTERNATIVE_CFG old_c #define __ALTERNATIVE_CFG_2(old_c, ...) ALTERNATIVE_CFG old_c =20 +#define _ALTERNATIVE_CFG_3(old_c, ...) \ + ALTERNATIVE_CFG old_c + #else /* !__ASSEMBLER__ */ =20 #define __ALTERNATIVE_CFG(old_c, ...) old_c "\n" #define __ALTERNATIVE_CFG_2(old_c, ...) old_c "\n" =20 +#define _ALTERNATIVE_CFG_3(old_c, ...) \ + __ALTERNATIVE_CFG(old_c) + #endif /* __ASSEMBLER__ */ =20 #define _ALTERNATIVE_CFG(old_c, ...) __ALTERNATIVE_CFG(old_c) @@ -147,15 +176,21 @@ _ALTERNATIVE_CFG(old_content, new_content, vendor_id, patch_id, CONFIG_k) =20 /* - * A vendor wants to replace an old_content, but another vendor has used - * ALTERNATIVE() to patch its customized content at the same location. In - * this case, this vendor can create a new macro ALTERNATIVE_2() based - * on the following sample code and then replace ALTERNATIVE() with - * ALTERNATIVE_2() to append its customized content. + * Variant of ALTERNATIVE() that supports two sets of replacement content. */ #define ALTERNATIVE_2(old_content, new_content_1, vendor_id_1, patch_id_1,= CONFIG_k_1, \ new_content_2, vendor_id_2, patch_id_2, CONFIG_k_2) \ _ALTERNATIVE_CFG_2(old_content, new_content_1, vendor_id_1, patch_id_1, C= ONFIG_k_1, \ new_content_2, vendor_id_2, patch_id_2, CONFIG_k_2) =20 +/* + * Variant of ALTERNATIVE() that supports three sets of replacement conten= t. + */ +#define ALTERNATIVE_3(old_content, new_content_1, vendor_id_1, patch_id_1,= CONFIG_k_1, \ + new_content_2, vendor_id_2, patch_id_2, CONFIG_k_2, \ + new_content_3, vendor_id_3, patch_id_3, CONFIG_k_3) \ + _ALTERNATIVE_CFG_3(old_content, new_content_1, vendor_id_1, patch_id_1, C= ONFIG_k_1, \ + new_content_2, vendor_id_2, patch_id_2, CONFIG_k_2, \ + new_content_3, vendor_id_3, patch_id_3, CONFIG_k_3) + #endif --=20 2.47.2