linux-kernel - [PATCH] Remove POWER10_CPU dependency and move PPC_MODULE_FEATURE

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Date:   Wed, 12 Apr 2023 14:12:32 -0400
From:   Danny Tsen <dtsen@...ux.ibm.com>
To:     linux-crypto@...r.kernel.org
Cc:     herbert@...dor.apana.org.au, leitao@...ian.org,
        nayna@...ux.ibm.com, appro@...ptogams.org,
        linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org,
        mpe@...erman.id.au, ltcgcw@...ux.vnet.ibm.com, dtsen@...ibm.com,
        Danny Tsen <dtsen@...ux.ibm.com>
Subject: [PATCH] Remove POWER10_CPU dependency and move PPC_MODULE_FEATURE_P10.

Remove Power10 dependency in Kconfig and detect Power10 feature at runtime.
Move PPC_MODULE_FEATURE_P10 definition to be in
arch/powerpc/include/asm/cpufeature.h.

Signed-off-by: Danny Tsen <dtsen@...ux.ibm.com>
---
 arch/powerpc/crypto/Kconfig            | 2 +-
 arch/powerpc/crypto/aes-gcm-p10-glue.c | 1 -
 arch/powerpc/include/asm/cpufeature.h  | 1 +
 3 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/crypto/Kconfig b/arch/powerpc/crypto/Kconfig
index 1f8f02b494e1..7113f9355165 100644
--- a/arch/powerpc/crypto/Kconfig
+++ b/arch/powerpc/crypto/Kconfig
@@ -96,7 +96,7 @@ config CRYPTO_AES_PPC_SPE
 
 config CRYPTO_AES_GCM_P10
 	tristate "Stitched AES/GCM acceleration support on P10 or later CPU (PPC)"
-	depends on PPC64 && POWER10_CPU && CPU_LITTLE_ENDIAN
+	depends on PPC64 && CPU_LITTLE_ENDIAN
 	select CRYPTO_LIB_AES
 	select CRYPTO_ALGAPI
 	select CRYPTO_AEAD
diff --git a/arch/powerpc/crypto/aes-gcm-p10-glue.c b/arch/powerpc/crypto/aes-gcm-p10-glue.c
index 1533c8cdd26f..bd3475f5348d 100644
--- a/arch/powerpc/crypto/aes-gcm-p10-glue.c
+++ b/arch/powerpc/crypto/aes-gcm-p10-glue.c
@@ -22,7 +22,6 @@
 #include <linux/module.h>
 #include <linux/types.h>
 
-#define PPC_MODULE_FEATURE_P10	(32 + ilog2(PPC_FEATURE2_ARCH_3_1))
 #define	PPC_ALIGN		16
 #define GCM_IV_SIZE		12
 
diff --git a/arch/powerpc/include/asm/cpufeature.h b/arch/powerpc/include/asm/cpufeature.h
index f6f790a90367..2dcc66225e7f 100644
--- a/arch/powerpc/include/asm/cpufeature.h
+++ b/arch/powerpc/include/asm/cpufeature.h
@@ -22,6 +22,7 @@
  */
 
 #define PPC_MODULE_FEATURE_VEC_CRYPTO			(32 + ilog2(PPC_FEATURE2_VEC_CRYPTO))
+#define PPC_MODULE_FEATURE_P10				(32 + ilog2(PPC_FEATURE2_ARCH_3_1))
 
 #define cpu_feature(x)		(x)
 
-- 
2.31.1