kernel/linux.git/arch/powerpc/include/asm/prom.h, branch linux-7.0.y

powerpc: increase MIN RMA size for CAS negotiation

2025-02-11T05:23:00+00:00

Change RMA size from 512 MB to 768 MB which will result in more RMA at boot time for PowerPC. When PowerPC LPAR use/uses vTPM, Secure Boot or FADump, the 512 MB RMA memory is not sufficient for booting. With this 512 MB RMA, GRUB2 run out of memory and unable to load the necessary. Sometimes even usage of CDROM which requires more memory for installation along with the options mentioned above troubles the boot memory and result in boot failures. Increasing the RMA size will resolves multiple out of memory issues observed in PowerPC. Failure details: 1. GRUB2 kern/ieee1275/init.c:550: mm requested region of size 8513000, flags 1 kern/ieee1275/init.c:563: Cannot satisfy allocation and retain minimum runtime space kern/ieee1275/init.c:550: mm requested region of size 8513000, flags 0 kern/ieee1275/init.c:563: Cannot satisfy allocation and retain minimum runtime space kern/file.c:215: Closing `/ppc/ppc64/initrd.img' ... kern/disk.c:297: Closing `ieee1275//vdevice/v-scsi @30000067/disk@8300000000000000'... kern/disk.c:311: Closing `ieee1275//vdevice/v-scsi @30000067/disk@8300000000000000' succeeded. kern/file.c:225: Closing `/ppc/ppc64/initrd.img' failed with 3. kern/file.c:148: Opening `/ppc/ppc64/initrd.img' succeeded. error: ../../grub-core/kern/mm.c:552:out of memory. 2. Kernel [ 0.777633] List of all partitions: [ 0.777639] No filesystem could mount root, tried: [ 0.777640] [ 0.777649] Kernel panic - not syncing: VFS: Unable to mount root fs on "" or unknown-block(0,0) [ 0.777658] CPU: 17 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.11.0-0.rc4.20.el10.ppc64le #1 [ 0.777669] Hardware name: IBM,9009-22A POWER9 (architected) 0x4e0202 0xf000005 of:IBM,FW950.B0 (VL950_149) hv:phyp pSeries [ 0.777678] Call Trace: [ 0.777682] [c000000003db7b60] [c000000001119714] dump_stack_lvl+0x88/0xc4 (unreliable) [ 0.777700] [c000000003db7b90] [c00000000016c274] panic+0x174/0x460 [ 0.777711] [c000000003db7c30] [c00000000200631c] mount_root_generic+0x320/0x354 [ 0.777724] [c000000003db7d00] [c0000000020066f8] prepare_namespace+0x27c/0x2f4 [ 0.777735] [c000000003db7d90] [c000000002005824] kernel_init_freeable+0x254/0x294 [ 0.777747] [c000000003db7df0] [c00000000001131c] kernel_init+0x30/0x1c4 [ 0.777757] [c000000003db7e50] [c00000000000debc] ret_from_kernel_user_thread+0x14/0x1c [ 0.777768] --- interrupt: 0 at 0x0 [ 0.784238] pstore: backend (nvram) writing error (-1) [ 0.790447] Rebooting in 10 seconds.. Signed-off-by: Avnish Chouhan Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/20250123114254.200527-4-sourabhjain@linux.ibm.com

powerpc: export MIN RMA size

2025-02-11T05:22:59+00:00

Commit 683eab94da75bc ("powerpc/fadump: setup additional parameters for dump capture kernel") introduced the additional parameter feature in fadump for HASH MMU with the understanding that GRUB does not use the memory area between 640MB and 768MB for its operation. However, the third patch ("powerpc: increase MIN RMA size for CAS negotiation") in this series is changing the MIN RMA size to 768MB, allowing GRUB to use memory up to 768MB. This makes the fadump reservation for the additional parameter feature for HASH MMU unreliable. To address this, export the MIN_RMA so that the next patch ("powerpc/fadump: fix additional param memory reservation for HASH MMU") can identify the correct memory range for the additional parameter feature in fadump for HASH MMU. Reviewed-by: Mahesh Salgaonkar Signed-off-by: Sourabh Jain Signed-off-by: Madhavan Srinivasan Link: https://patch.msgid.link/20250123114254.200527-2-sourabhjain@linux.ibm.com

powerpc: export the CPU node count

2022-12-07T09:14:49+00:00

At boot time, the FDT is parsed to compute the number of CPUs. In addition count the number of CPU nodes and export it. This is useful when building the FDT for a kexeced kernel since we need to take in account the CPU node added since the boot time during CPU hotplug operations. Signed-off-by: Laurent Dufour Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20221110180619.15796-2-ldufour@linux.ibm.com

powerpc: Finally remove unnecessary headers from asm/prom.h

2022-07-28T06:22:12+00:00

Remove all headers included from asm/prom.h which are not used by asm/prom.h itself. Declare struct device_node and struct property locally to avoid including of.h Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/4be954abef978b34cff9193fc566ffefdd3517bb.1657264228.git.christophe.leroy@csgroup.eu

powerpc: Include asm/firmware.h in all users of firmware_has_feature()

2022-06-29T06:45:05+00:00

Trying to remove asm/ppc_asm.h from all places that don't need it leads to several failures linked to firmware_has_feature(). To fix it, include asm/firmware.h in all files using firmware_has_feature() All users found with: git grep -L "firmware\.h" ` git grep -l "firmware_has_feature("` Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/11956ec181a034b51a881ac9c059eea72c679a73.1651828453.git.christophe.leroy@csgroup.eu

powerpc/pseries: Add support for FORM2 associativity

2021-08-13T12:04:27+00:00

PAPR interface currently supports two different ways of communicating resource grouping details to the OS. These are referred to as Form 0 and Form 1 associativity grouping. Form 0 is the older format and is now considered deprecated. This patch adds another resource grouping named FORM2. Signed-off-by: Daniel Henrique Barboza Signed-off-by: Aneesh Kumar K.V Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210812132223.225214-6-aneesh.kumar@linux.ibm.com

powerpc/pseries: Rename TYPE1_AFFINITY to FORM1_AFFINITY

2021-08-13T12:04:26+00:00

Also make related code cleanup that will allow adding FORM2_AFFINITY in later patches. No functional change in this patch. Signed-off-by: Aneesh Kumar K.V Reviewed-by: David Gibson Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20210812132223.225214-3-aneesh.kumar@linux.ibm.com

powerpc: Add POWER10 architected mode

2020-06-02T10:59:20+00:00

PVR value of 0x0F000006 means we are arch v3.1 compliant (i.e. POWER10). This is used by phyp and kvm when booting as a pseries guest to detect the presence of new P10 features and to enable the appropriate hwcap and facility bits. Signed-off-by: Alistair Popple Signed-off-by: Cédric Le Goater [mpe: Fall through to __init_FSCR rather than duplicating it, drop hack to set current->thread.fscr now that is handled elsewhere.] Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20200521014341.29095-8-alistair@popple.id.au

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152

2019-05-30T18:26:32+00:00

Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner Reviewed-by: Allison Randal Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman

pseries/drc-info: Search DRC properties for CPU indexes

2018-01-21T05:21:46+00:00

pseries/drc-info: Provide parallel routines to convert between drc_index and CPU numbers at runtime, using the older device-tree properties ("ibm,drc-indexes", "ibm,drc-names", "ibm,drc-types" and "ibm,drc-power-domains"), or the new property "ibm,drc-info". Signed-off-by: Michael Bringmann Signed-off-by: Michael Ellerman