kernel/arch/powerpc/include/asm/ppc_asm.h, branch linux-4.16.y

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

powerpc/64s: Fix FIXUP_ENDIAN non-maskable interrupt reentrancy

2017-05-30T04:59:51Z

FIXUP_ENDIAN uses SRR[01] with MSR_RI=1, which gets corrupted if there is an interleaving system reset or machine check interrupt. Set MSR_RI=0 before setting SRRs. The rfid will restore MSR. Signed-off-by: Nicholas Piggin Signed-off-by: Michael Ellerman

powerpc/32: Remove FIX_SRR1

2017-01-26T23:49:32Z

FIX_SRR1() is defined as blank. Last useful instance of FIX_SRR1() was removed by commit 40ef8cbc6d360 ("powerpc: Get 64-bit configs to compile with ARCH=powerpc") in 2005. Signed-off-by: Christophe Leroy Signed-off-by: Scott Wood

powerpc: Make _ASM_NOKPROBE_SYMBOL a noop when KPROBES not defined

2016-11-14T00:11:51Z

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

powerpc: Add support for relative exception tables

2016-11-14T00:11:51Z

This halves the exception table size on 64-bit builds, and it allows build-time sorting of exception tables to work on relocated kernels. Signed-off-by: Nicholas Piggin [mpe: Minor asm fixups and bits to keep the selftests working] Signed-off-by: Michael Ellerman

powerpc: EX_TABLE macro for exception tables

2016-11-14T00:11:51Z

This macro is taken from s390, and allows more flexibility in changing exception table format. mpe: Put it in ppc_asm.h and only define one version using stringinfy_in_c(). Add some empty definitions and headers to keep the selftests happy. Signed-off-by: Nicholas Piggin Signed-off-by: Michael Ellerman