From 6c46fcce39f0eb4830078c5f1db289dd7196f84a Mon Sep 17 00:00:00 2001 From: Nicholas Piggin Date: Sun, 23 Jun 2019 20:41:52 +1000 Subject: powerpc/64s/radix: keep kernel ERAT over local process/guest invalidates ISA v3.0 radix modes provide SLBIA variants which can invalidate ERAT for effPID!=0 or for effLPID!=0, which allows user and guest invalidations to retain kernel/host ERAT entries. Signed-off-by: Nicholas Piggin Signed-off-by: Michael Ellerman --- arch/powerpc/include/asm/ppc-opcode.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'arch/powerpc/include/asm/ppc-opcode.h') diff --git a/arch/powerpc/include/asm/ppc-opcode.h b/arch/powerpc/include/asm/ppc-opcode.h index 14f43b6cf7ec..971bdf84f6fc 100644 --- a/arch/powerpc/include/asm/ppc-opcode.h +++ b/arch/powerpc/include/asm/ppc-opcode.h @@ -591,7 +591,16 @@ #define PPC_SLBIA(IH) stringify_in_c(.long PPC_INST_SLBIA | \ ((IH & 0x7) << 21)) + +/* + * These may only be used on ISA v3.0 or later (aka. CPU_FTR_ARCH_300, radix + * implies CPU_FTR_ARCH_300). USER/GUEST invalidates may only be used by radix + * mode (on HPT these would also invalidate various SLBEs which may not be + * desired). + */ #define PPC_ISA_3_0_INVALIDATE_ERAT PPC_SLBIA(7) +#define PPC_RADIX_INVALIDATE_ERAT_USER PPC_SLBIA(3) +#define PPC_RADIX_INVALIDATE_ERAT_GUEST PPC_SLBIA(6) #define VCMPEQUD_RC(vrt, vra, vrb) stringify_in_c(.long PPC_INST_VCMPEQUD | \ ___PPC_RT(vrt) | ___PPC_RA(vra) | \ -- cgit v1.2.3-73-gaa49b