pm24.git/arch/powerpc/Kconfig.debug, branch v5.6

powerpc/ptdump: Only enable PPC_CHECK_WX with STRICT_KERNEL_RWX

2020-01-23T10:31:13Z

ptdump_check_wx() is called from mark_rodata_ro() which only exists when CONFIG_STRICT_KERNEL_RWX is selected. Fixes: 453d87f6a8ae ("powerpc/mm: Warn if W+X pages found on boot") Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/922d4939c735c6b52b4137838bcc066fffd4fc33.1578989545.git.christophe.leroy@c-s.fr

powerpc: Fix Kconfig indentation

2019-11-25T10:45:43Z

Adjust indentation from spaces to tab (+optional two spaces) as in coding style with command like: $ sed -e 's/^ /\t/' -i */Kconfig Signed-off-by: Krzysztof Kozlowski Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/1574306461-7646-1-git-send-email-krzk@kernel.org

powerpc/xmon: add read-only mode

2019-05-02T16:54:57Z

Operations which write to memory and special purpose registers should be restricted on systems with integrity guarantees (such as Secure Boot) and, optionally, to avoid self-destructive behaviors. Add a config option, XMON_DEFAULT_RO_MODE, to set default xmon behavior. The kernel cmdline options xmon=ro and xmon=rw override this default. The following xmon operations are affected: memops: disable memmove disable memset disable memzcan memex: no-op'd mwrite super_regs: no-op'd write_spr bpt_cmds: disable proc_call: disable Signed-off-by: Christopher M. Riedl Reviewed-by: Oliver O'Halloran Reviewed-by: Andrew Donnellan Signed-off-by: Michael Ellerman

powerpc/mm: Warn if W+X pages found on boot

2019-05-02T16:54:45Z

Implement code to walk all pages and warn if any are found to be both writable and executable. Depends on STRICT_KERNEL_RWX enabled, and is behind the DEBUG_WX config option. This only runs on boot and has no runtime performance implications. Very heavily influenced (and in some cases copied verbatim) from the ARM64 code written by Laura Abbott (thanks!), since our ptdump infrastructure is similar. Signed-off-by: Russell Currey [mpe: Fixup build error when disabled] Signed-off-by: Michael Ellerman

powerpc/32: prepare shadow area for KASAN

2019-05-02T15:20:26Z

This patch prepares a shadow area for KASAN. The shadow area will be at the top of the kernel virtual memory space above the fixmap area and will occupy one eighth of the total kernel virtual memory space. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman

powerpc: Move page table dump files in a dedicated subdirectory

2019-02-22T11:29:22Z

This patch moves the files related to page table dump in a dedicated subdirectory. The purpose is to clean a bit arch/powerpc/mm by regrouping multiple files handling a dedicated function. Signed-off-by: Christophe Leroy [mpe: Shorten the file names while we're at it] Signed-off-by: Michael Ellerman

powerpc: remove redundant 'default n' from Kconfig-s

2018-10-13T11:21:25Z

'default n' is the default value for any bool or tristate Kconfig setting so there is no need to write it explicitly. Also since commit f467c5640c29 ("kconfig: only write '# CONFIG_FOO is not set' for visible symbols") the Kconfig behavior is the same regardless of 'default n' being present or not: ... One side effect of (and the main motivation for) this change is making the following two definitions behave exactly the same: config FOO bool config FOO bool default n With this change, neither of these will generate a '# CONFIG_FOO is not set' line (assuming FOO isn't selected/implied). That might make it clearer to people that a bare 'default n' is redundant. ... Signed-off-by: Bartlomiej Zolnierkiewicz Signed-off-by: Michael Ellerman

Kconfig: consolidate the "Kernel hacking" menu

2018-08-01T23:06:48Z

Move the source of lib/Kconfig.debug and arch/$(ARCH)/Kconfig.debug to the top-level Kconfig. For two architectures that means moving their arch-specific symbols in that menu into a new arch Kconfig.debug file, and for a few more creating a dummy file so that we can include it unconditionally. Also move the actual 'Kernel hacking' menu to lib/Kconfig.debug, where it belongs. Signed-off-by: Christoph Hellwig Signed-off-by: Masahiro Yamada

powerpc: Add new kconfig CONFIG_PPC_IRQ_SOFT_MASK_DEBUG

2018-01-19T11:37:03Z

New Kconfig is added "CONFIG_PPC_IRQ_SOFT_MASK_DEBUG" to add WARN_ON to alert the invalid transitions. Also moved the code under the CONFIG_TRACE_IRQFLAGS in arch_local_irq_restore() to new Kconfig. Reviewed-by: Nicholas Piggin Signed-off-by: Madhavan Srinivasan [mpe: Fix name of CONFIG option in change log] Signed-off-by: Michael Ellerman

powerpc/32s: Fix compile error with CONFIG_PPC_PTDUMP

2018-01-16T12:35:02Z

This patch remove CONFIG_PPC_HTDUMP if not PPC_BOOK3S_64 to avoid below compile failure on BOOK3S_32: In file included from arch/powerpc/mm/dump_hashpagetable.c:27:0: ./arch/powerpc/include/asm/plpar_wrappers.h: In function 'get_cede_latency_hint': ./arch/powerpc/include/asm/plpar_wrappers.h:27:2: error: implicit declaration of function 'get_lppaca' [-Werror=implicit-function-declaration] ... arch/powerpc/mm/dump_hashpagetable.c: At top level: arch/powerpc/mm/dump_hashpagetable.c:69:13: error: 'SLB_VSID_B' undeclared here (not in a function) ... arch/powerpc/mm/dump_hashpagetable.c:506:38: error: 'VMEMMAP_BASE' undeclared (first use in this function) arch/powerpc/mm/dump_hashpagetable.c:506:35: error: assignment makes integer from pointer without a cast [-Werror] Fixes: dd5ac03e0955 ("powerpc/mm: Fix page table dump build on non-Book3S") Signed-off-by: Christophe Leroy [mpe: Trim change log] Signed-off-by: Michael Ellerman