kernel/arch/powerpc/include/asm/ppc_asm.h, branch linux-5.2.y

powerpc/fsl: Add macro to flush the branch predictor

2018-12-20T11:58:57Z

The BUCSR register can be used to invalidate the entries in the branch prediction mechanisms. Signed-off-by: Diana Craciun Signed-off-by: Michael Ellerman

powerpc: remove remaining bits from CONFIG_APUS

2018-12-19T07:56:32Z

commit f21f49ea639a ("[POWERPC] Remove the dregs of APUS support from arch/powerpc") removed CONFIG_APUS, but forgot to remove the logic which adapts tophys() and tovirt() for it. This patch removes the last stale pieces. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman

powerpc: clean inclusions of asm/feature-fixups.h

2018-07-30T12:48:17Z

files not using feature fixup don't need asm/feature-fixups.h files using feature fixup need asm/feature-fixups.h Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman

powerpc/32: Use stmw/lmw for registers save/restore in asm

2018-05-17T14:09:06Z

arch/powerpc/Makefile activates -mmultiple on BE PPC32 configs in order to use multiple word instructions in functions entry/exit. The patch does the same for the asm parts, for consistency. On processors like the 8xx on which insn fetching is pretty slow, this speeds up registers save/restore. Signed-off-by: Christophe Leroy [mpe: PPC32 is BE only, so drop the endian checks] Signed-off-by: Michael Ellerman

powerpc/64s: Set assembler machine type to POWER4

2018-03-31T13:47:49Z

Rather than override the machine type in .S code (which can hide wrong or ambiguous code generation for the target), set the type to power4 for all assembly. This also means we need to be careful not to build power4-only code when we're not building for Book3S, such as the "power7" versions of copyuser/page/memcpy. Signed-off-by: Nicholas Piggin [mpe: Fix Book3E build, don't build the "power7" variants for non-Book3S] Signed-off-by: Michael Ellerman

powerpc/book3s: Add an HV variant of FIXUP_ENDIAN that is recoverable

2017-11-06T05:48:08Z

Add an HV variant of FIXUP_ENDIAN which uses HSRR[01] and does not clear MSR[RI], which improves recoverability. Signed-off-by: Nicholas Piggin Signed-off-by: Michael Ellerman

powerpc/book3s: Use label for FIXUP_ENDIAN macro branch

2017-11-06T05:48:07Z

Signed-off-by: Nicholas Piggin Signed-off-by: Michael Ellerman

powerpc/8xx: Getting rid of remaining use of CONFIG_8xx

2017-08-10T13:32:12Z

Two config options exist to define powerpc MPC8xx: * CONFIG_PPC_8xx * CONFIG_8xx arch/powerpc/platforms/Kconfig.cputype has contained the following comment about CONFIG_8xx item for some years: "# this is temp to handle compat with arch=ppc" arch/powerpc is now the only place with remaining use of CONFIG_8xx: get rid of them. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman

powerpc/time: refactor MFTB() to limit number of ifdefs

2017-08-10T13:32:09Z

The 8xx cannot access the TBL and TBU registers using mfspr/mtspr It must be accessed using mftb/mftbu Due to this, there is a number of places with #ifdef CONFIG_8xx This patch defines new macros MFTBL(x) and MFTBU(x) on the same model as MFTB(x) and tries to make use of them as much as possible. In arch/powerpc/include/asm/timex.h, we also remove the ifdef for the asm() operands as the compiler doesn't mind unused operands Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman

powerpc: Fix invalid use of register expressions

2017-08-10T12:29:41Z

binutils >= 2.26 now warns about misuse of register expressions in assembler operands that are actually literals, for example: arch/powerpc/kernel/entry_64.S:535: Warning: invalid register expression In practice these are almost all uses of r0 that should just be a literal 0. Signed-off-by: Andreas Schwab [mpe: Mention r0 is almost always the culprit, fold in purgatory change] Signed-off-by: Michael Ellerman