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Commit a4700a26 authored by Nicholas Piggin's avatar Nicholas Piggin Committed by Michael Ellerman
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powerpc: Add PPC_FEATURE userspace bits for SCV and DARN instructions 



Providing "scv" support to userspace requires kernel support, so it
must be advertised as independently to the base ISA 3 instruction set.

The darn instruction relies on firmware enablement, so it has been
decided to split this out from the core ISA 3 feature as well.

Signed-off-by: default avatarNicholas Piggin <npiggin@gmail.com>
Acked-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent d75e4919

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

+2 −0
Original line number Diff line number Diff line
@@ -46,6 +46,8 @@ 
#define PPC_FEATURE2_HTM_NOSC		0x01000000

#define PPC_FEATURE2_ARCH_3_00		0x00800000 /* ISA 3.00 */

#define PPC_FEATURE2_HAS_IEEE128	0x00400000 /* VSX IEEE Binary Float 128-bit */

#define PPC_FEATURE2_DARN		0x00200000 /* darn random number insn */

#define PPC_FEATURE2_SCV		0x00100000 /* scv syscall */



/*

 * IMPORTANT!

arch/powerpc/kernel/cputable.c

+2 −1
Original line number Diff line number Diff line
@@ -124,7 +124,8 @@ extern void __restore_cpu_e6500(void); 
#define COMMON_USER_POWER9	COMMON_USER_POWER8

#define COMMON_USER2_POWER9	(COMMON_USER2_POWER8 | \

				 PPC_FEATURE2_ARCH_3_00 | \

				 PPC_FEATURE2_HAS_IEEE128)

				 PPC_FEATURE2_HAS_IEEE128 | \

				 PPC_FEATURE2_DARN )



#ifdef CONFIG_PPC_BOOK3E_64

#define COMMON_USER_BOOKE	(COMMON_USER_PPC64 | PPC_FEATURE_BOOKE)