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Commit dd58a092 authored Jun 10, 2014 by Benjamin Herrenschmidt

powerpc: Add AT_HWCAP2 to indicate V.CRYPTO category support



The Vector Crypto category instructions are supported by current POWER8
chips, advertise them to userspace using a specific bit to properly
differentiate with chips of the same architecture level that might not
have them.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: <stable@vger.kernel.org> [v3.10+]

parent dfb94547

arch/powerpc/include/uapi/asm/cputable.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -41,5 +41,6 @@
		#define PPC_FEATURE2_EBB 0x10000000
		#define PPC_FEATURE2_ISEL 0x08000000
		#define PPC_FEATURE2_TAR 0x04000000
		#define PPC_FEATURE2_VEC_CRYPTO 0x02000000

		#endif /* _UAPI__ASM_POWERPC_CPUTABLE_H */

arch/powerpc/kernel/cputable.c

+2 −1

Original line number	Diff line number	Diff line
		@@ -109,7 +109,8 @@ extern void __restore_cpu_e6500(void);
		PPC_FEATURE_PSERIES_PERFMON_COMPAT)
		#define COMMON_USER2_POWER8 (PPC_FEATURE2_ARCH_2_07 \| \
		PPC_FEATURE2_HTM_COMP \| PPC_FEATURE2_DSCR \| \
		PPC_FEATURE2_ISEL \| PPC_FEATURE2_TAR)
		PPC_FEATURE2_ISEL \| PPC_FEATURE2_TAR \| \
		PPC_FEATURE2_VEC_CRYPTO)
		#define COMMON_USER_PA6T (COMMON_USER_PPC64 \| PPC_FEATURE_PA6T \|\
		PPC_FEATURE_TRUE_LE \| \
		PPC_FEATURE_HAS_ALTIVEC_COMP)