linux-kernel - [RFC PATCH v1 0/3] Enable CONFIG_VMAP

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Date:   Tue, 11 Dec 2018 11:23:50 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@....fr>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [RFC PATCH v1 0/3] Enable CONFIG_VMAP_STACK on the 8xx

The purpose of this serie is to enable CONFIG_VMAP_STACK on the 8xx.

I'm sending it now to get early feedback if any.
For the time being, there is no proper handling of stack overflow.

This serie applies on the top of the serie "powerpc: Switch to CONFIG_THREAD_INFO_IN_TASK"

Christophe Leroy (3):
  powerpc/32: prepare for CONFIG_VMAP_STACK
  powerpc/8xx: Use alternative scratch registers in DTLB miss handler
  powerpc/8xx: Enable CONFIG_VMAP_STACK

 arch/powerpc/Kconfig                   |   1 +
 arch/powerpc/include/asm/processor.h   |   5 ++
 arch/powerpc/include/asm/thread_info.h |   5 ++
 arch/powerpc/kernel/asm-offsets.c      |   5 ++
 arch/powerpc/kernel/entry_32.S         |  16 +++++
 arch/powerpc/kernel/head_8xx.S         | 114 ++++++++++++++++++++++++++-------
 arch/powerpc/perf/8xx-pmu.c            |  12 ++--
 7 files changed, 132 insertions(+), 26 deletions(-)

-- 
2.13.3