pm24.git/arch/powerpc/kernel/sysfs.c, branch v5.6

powerpc/pseries/svm: Export guest SVM status to user space via sysfs

2019-08-29T23:55:41Z

User space might want to know it's running in a secure VM. It can't do a mfmsr because mfmsr is a privileged instruction. The solution here is to create a cpu attribute: /sys/devices/system/cpu/svm which will read 0 or 1 based on the S bit of the current CPU. Signed-off-by: Ryan Grimm Signed-off-by: Thiago Jung Bauermann Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20190820021326.6884-12-bauerman@linux.ibm.com

treewide: Add SPDX license identifier for missed files

2019-05-21T08:50:45Z

Add SPDX license identifiers to all files which: - Have no license information of any form - Have EXPORT_.*_SYMBOL_GPL inside which was used in the initial scan/conversion to ignore the file These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner Signed-off-by: Greg Kroah-Hartman

powerpc: replace CONFIG_DEBUG_KERNEL with CONFIG_DEBUG_MISC

2019-05-15T02:52:50Z

CONFIG_DEBUG_KERNEL should not impact code generation. Use the newly defined CONFIG_DEBUG_MISC instead to keep the current code. Link: http://lkml.kernel.org/r/20190413224438.10802-3-okaya@kernel.org Signed-off-by: Sinan Kaya Reviewed-by: Josh Triplett Reviewed-by: Kees Cook Cc: Benjamin Herrenschmidt Cc: Paul Mackerras Cc: Michael Ellerman Cc: Christophe Leroy Cc: Anders Roxell Cc: Chris Zankel Cc: "David S. Miller" Cc: Florian Westphal Cc: Greg Kroah-Hartman Cc: James Hogan Cc: Jozsef Kadlecsik Cc: Max Filippov Cc: Michal Hocko Cc: Mike Rapoport Cc: Pablo Neira Ayuso Cc: Paul Burton Cc: Ralf Baechle Cc: Thomas Bogendoerfer Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds

powerpc: change CONFIG_6xx to CONFIG_PPC_BOOK3S_32

2018-11-26T11:33:37Z

Today we have: config PPC_BOOK3S_32 bool "512x/52xx/6xx/7xx/74xx/82xx/83xx/86xx" [depends on PPC32 within a choice] config PPC_BOOK3S def_bool y depends on PPC_BOOK3S_32 || PPC_BOOK3S_64 config 6xx def_bool y depends on PPC32 && PPC_BOOK3S 6xx is therefore redundant with PPC_BOOK3S_32. In order to make the code clearer, lets use preferably PPC_BOOK3S_32. This will allow to remove CONFIG_6xx in a later patch. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman

Merge branch 'topic/paca' into next

2018-03-30T22:09:36Z

Bring in yet another series that touches KVM code, and might need to be merged into the kvm-ppc branch to resolve conflicts. This required some changes in pnv_power9_force_smt4_catch/release() due to the paca array becomming an array of pointers.

powerpc/64: move default SPR recording

2018-03-30T12:34:26Z

Move this into the early setup code, and don't iterate over CPU masks. We don't want to call into sysfs so early from setup, and a future patch won't initialize CPU masks by the time this is called. Signed-off-by: Nicholas Piggin [mpe: Fold in incremental fix from Nick for DSCR handling] Signed-off-by: Michael Ellerman

powerpc/64: Use array of paca pointers and allocate pacas individually

2018-03-30T12:34:23Z

Change the paca array into an array of pointers to pacas. Allocate pacas individually. This allows flexibility in where the PACAs are allocated. Future work will allocate them node-local. Platforms that don't have address limits on PACAs would be able to defer PACA allocations until later in boot rather than allocate all possible ones up-front then freeing unused. This is slightly more overhead (one additional indirection) for cross CPU paca references, but those aren't too common. Signed-off-by: Nicholas Piggin Signed-off-by: Michael Ellerman

powerpc: Expose TSCR via sysfs only on powernv

2018-02-14T22:54:42Z

The TSCR can only be accessed in hypervisor mode. Fixes: 88b5e12eeb11 ("powerpc: Expose TSCR via sysfs") Signed-off-by: Cyril Bur Signed-off-by: Michael Ellerman

powerpc: Expose TSCR via sysfs

2018-01-21T18:48:36Z

The thread switch control register (TSCR) is a per core register that configures how the CPU shares resources between SMT threads. Exposing it via sysfs allows us to tune it at run time. Signed-off-by: Anton Blanchard Signed-off-by: Michael Ellerman

powerpc/64: Set DSCR default initially from SPR

2017-11-10T11:11:35Z

Take the DSCR value set by firmware as the dscr_default value, rather than zero. POWER9 recommends DSCR default to a non-zero value. Signed-off-by: From: Nicholas Piggin [mpe: Make record_spr_defaults() __init] Signed-off-by: Michael Ellerman