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powerpc fixes for 4.9 #7 

Four fixes, the first for code we merged this cycle and three that are also
 going to stable:
 
  - On 64-bit Book3E we were not placing the .text section where we said we would
    in the asm.
  - We broke building the boot wrapper on some 32-bit toolchains.
  - Lazy icache flushing was broken on pre-POWER5 machines.
  - One of the error paths in our EEH code would lead to a deadlock.
 
 Thanks to:
   Andrew Donnellan, Ben Hutchings, Benjamin Herrenschmidt, Nicholas Piggin.
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Merge tag 'powerpc-4.9-7' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:
 "Four fixes, the first for code we merged this cycle and three that are
  also going to stable:

   - On 64-bit Book3E we were not placing the .text section where we
     said we would in the asm.

   - We broke building the boot wrapper on some 32-bit toolchains.

   - Lazy icache flushing was broken on pre-POWER5 machines.

   - One of the error paths in our EEH code would lead to a deadlock.

  Thanks to: Andrew Donnellan, Ben Hutchings, Benjamin Herrenschmidt,
  Nicholas Piggin"

* tag 'powerpc-4.9-7' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/64: Fix placement of .text to be immediately following .head.text
  powerpc/eeh: Fix deadlock when PE frozen state can't be cleared
  powerpc/mm: Fix lazy icache flush on pre-POWER5
  powerpc/boot: Fix build failure in 32-bit boot wrapper
hifive-unleashed-5.1
Linus Torvalds 2016-12-05 10:30:12 -08:00
parent ef3263e35e dadc4a1bb9
commit d9d04527c7
6 changed files with 18 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/powerpc/boot/Makefile
View File

@ -100,7 +100,8 @@ src-wlib-y := string.S crt0.S crtsavres.S stdio.c decompress.c main.c \
ns16550.c serial.c simple_alloc.c div64.S util.S \
elf_util.c $(zlib-y) devtree.c stdlib.c \
oflib.c ofconsole.c cuboot.c mpsc.c cpm-serial.c \
uartlite.c mpc52xx-psc.c opal.c opal-calls.S
uartlite.c mpc52xx-psc.c opal.c
src-wlib-$(CONFIG_PPC64_BOOT_WRAPPER) += opal-calls.S
src-wlib-$(CONFIG_40x) += 4xx.c planetcore.c
src-wlib-$(CONFIG_44x) += 4xx.c ebony.c bamboo.c
src-wlib-$(CONFIG_8xx) += mpc8xx.c planetcore.c fsl-soc.c

2
arch/powerpc/boot/opal.c
View File

@ -13,7 +13,7 @@
#include <libfdt.h>
#include "../include/asm/opal-api.h"
#ifdef __powerpc64__
#ifdef CONFIG_PPC64_BOOT_WRAPPER
/* Global OPAL struct used by opal-call.S */
struct opal {

4
arch/powerpc/kernel/eeh_driver.c
View File

@ -671,8 +671,10 @@ static int eeh_reset_device(struct eeh_pe *pe, struct pci_bus *bus,
/* Clear frozen state */
rc = eeh_clear_pe_frozen_state(pe, false);
if (rc)
if (rc) {
pci_unlock_rescan_remove();
return rc;
}
/* Give the system 5 seconds to finish running the user-space
* hotplug shutdown scripts, e.g. ifdown for ethernet. Yes,

9
arch/powerpc/kernel/vmlinux.lds.S
View File

@ -94,8 +94,17 @@ SECTIONS
* detected, and will result in a crash at boot due to offsets being
* wrong.
*/
#ifdef CONFIG_PPC64
/*
* BLOCK(0) overrides the default output section alignment because
* this needs to start right after .head.text in order for fixed
* section placement to work.
*/
.text BLOCK(0) : AT(ADDR(.text) - LOAD_OFFSET) {
#else
.text : AT(ADDR(.text) - LOAD_OFFSET) {
ALIGN_FUNCTION();
#endif
/* careful! __ftr_alt_* sections need to be close to .text */
*(.text .fixup __ftr_alt_* .ref.text)
SCHED_TEXT

2
arch/powerpc/mm/hash64_4k.c
View File

@ -55,7 +55,7 @@ int __hash_page_4K(unsigned long ea, unsigned long access, unsigned long vsid,
*/
rflags = htab_convert_pte_flags(new_pte);
if (!cpu_has_feature(CPU_FTR_NOEXECUTE) &&
if (cpu_has_feature(CPU_FTR_NOEXECUTE) &&
!cpu_has_feature(CPU_FTR_COHERENT_ICACHE))
rflags = hash_page_do_lazy_icache(rflags, __pte(old_pte), trap);

4
arch/powerpc/mm/hash64_64k.c
View File

@ -87,7 +87,7 @@ int __hash_page_4K(unsigned long ea, unsigned long access, unsigned long vsid,
subpg_pte = new_pte & ~subpg_prot;
rflags = htab_convert_pte_flags(subpg_pte);
if (!cpu_has_feature(CPU_FTR_NOEXECUTE) &&
if (cpu_has_feature(CPU_FTR_NOEXECUTE) &&
!cpu_has_feature(CPU_FTR_COHERENT_ICACHE)) {
/*
@ -258,7 +258,7 @@ int __hash_page_64K(unsigned long ea, unsigned long access,
rflags = htab_convert_pte_flags(new_pte);
if (!cpu_has_feature(CPU_FTR_NOEXECUTE) &&
if (cpu_has_feature(CPU_FTR_NOEXECUTE) &&
!cpu_has_feature(CPU_FTR_COHERENT_ICACHE))
rflags = hash_page_do_lazy_icache(rflags, __pte(old_pte), trap);