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Amit Machhiwal e4de1b9cb3 powerpc/dt_cpu_ftrs: Set CPU_FTR_P11_PVR for Power11 and later processors 
When using device tree CPU features (dt-cpu-ftrs), the kernel bypasses
the traditional cputable-based CPU identification and instead derives
CPU features from the device tree's "ibm,powerpc-cpu-features" node
provided by firmware.

However, CPU_FTR_P11_PVR is a kernel-internal feature flag used to
identify Power11 and later processors, and is not represented in the
device tree's ISA feature set. While ISA v3.1 support (indicated by
CPU_FTR_ARCH_31) is present on both Power10 and Power11, the
CPU_FTR_P11_PVR flag is specifically needed by code that must
distinguish between Power10 and Power11 processors.

Without this flag set, code that checks for Power11 using
cpu_has_feature(CPU_FTR_P11_PVR) will incorrectly return false on
Power11+ systems using dt-cpu-ftrs, leading to incorrect behavior.

This issue manifests specifically in powernv environments (bare-metal
or QEMU TCG with powernv machine type), where skiboot/OPAL firmware
provides the "ibm,powerpc-cpu-features" node, causing the kernel to
use dt-cpu-ftrs. The issue does not affect pseries guests, where SLOF
firmware does not provide this node, causing the kernel to fall back
to the traditional cputable path (identify_cpu) which correctly sets
CPU_FTR_P11_PVR during PVR-based CPU identification.

In powernv TCG guests, the missing flag causes KVM code to trigger
warnings when attempting to create KVM guests, as cpu_features shows
0x000c00eb8f4fb187 (missing bit 53) instead of the correct
0x002c00eb8f4fb187 (with bit 53 set).

Fix this by setting CPU_FTR_P11_PVR for all processors with
PVR >= PVR_POWER11 when ISA v3.1 support is detected in
cpufeatures_setup_start(). This approach ensures forward
compatibility with future processor generations.

Fixes: 96e266e3bc ("KVM: PPC: Book3S HV: Add Power11 capability support for Nested PAPR guests")
Cc: stable@vger.kernel.org # v6.13+
Signed-off-by: Amit Machhiwal <amachhiw@linux.ibm.com>
Reviewed-by: Mukesh Kumar Chaurasiya (IBM) <mkchauras@gmail.com>
Reviewed-by: Christophe Leroy (CS GROUP) <chleroy@kernel.org>
Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com>
Link: https://patch.msgid.link/20260614173437.26352-1-amachhiw@linux.ibm.com
2026-07-15 08:04:13 +05:30
..
ptrace powerpc: Remove unused functions 2026-05-20 06:57:14 +05:30
syscalls rseq: Implement sys_rseq_slice_yield() 2026-01-22 11:11:17 +01:00
trace powerpc64/ftrace: workaround clang recording GEP in __patchable_function_entries 2026-03-07 16:02:25 +05:30
vdso powerpc/vdso: Drop -DCC_USING_PATCHABLE_FUNCTION_ENTRY from 32-bit flags with clang 2026-05-06 07:45:59 +05:30
.gitignore
85xx_entry_mapping.S
align.c powerpc/align: Convert emulate_spe() to scoped user access 2026-04-01 09:21:07 +05:30
asm-offsets.c powerpc/32s: Fix segments setup when TASK_SIZE is not a multiple of 256M 2026-01-07 09:31:04 +05:30
audit_32.h powerpc: address missing-prototypes warnings 2023-08-02 22:22:19 +10:00
btext.c kernel.h: drop hex.h and update all hex.h users 2026-01-20 19:44:19 -08:00
cacheinfo.c powerpc: use sysfs_emit{_at} in sysfs show functions 2026-06-02 11:24:32 +05:30
cacheinfo.h
cpu_setup_6xx.S powerpc: rename SPRN_HID2 define to SPRN_HID2_750FX 2024-05-08 00:25:00 +10:00
cpu_setup_44x.S
cpu_setup_e500.S
cpu_setup_pa6t.S
cpu_setup_power.c powerpc/dexcr: Add initial Dynamic Execution Control Register (DEXCR) support 2023-06-19 17:36:25 +10:00
cpu_setup_ppc970.S
cpu_specs_8xx.h
cpu_specs_44x.h
cpu_specs_47x.h
cpu_specs_85xx.h
cpu_specs_book3s_32.h
cpu_specs_book3s_64.h powerpc: Add Power11 architected and raw mode 2024-02-21 23:11:00 +11:00
cpu_specs_e500mc.h powerpc/cputable: Add missing PPC_FEATURE_BOOKE on PPC64 Book-E 2024-02-14 14:24:06 +11:00
cpu_specs.h powerpc: Remove core support for 40x 2024-06-28 22:28:47 +10:00
cputable.c powerpc: Make cpu_spec __ro_after_init 2023-11-27 22:01:14 +11:00
crash_dump.c asm-generic: introduce text-patching.h 2024-11-07 14:25:15 -08:00
dawr.c
dbell.c
dexcr.c powerpc/dexcr: Add DEXCR prctl interface 2024-05-06 22:04:31 +10:00
dma-iommu.c driver core: Replace dev->dma_ops_bypass with dev_dma_ops_bypass() 2026-04-26 23:43:05 +02:00
dma-mask.c dma-mapping: move arch_dma_set_mask() declaration to header 2023-07-31 17:54:28 +02:00
dma-swiotlb.c
dt_cpu_ftrs.c powerpc/dt_cpu_ftrs: Set CPU_FTR_P11_PVR for Power11 and later processors 2026-07-15 08:04:13 +05:30
early_32.c
eeh_cache.c treewide: Replace kmalloc with kmalloc_obj for non-scalar types 2026-02-21 01:02:28 -08:00
eeh_driver.c powerpc/eeh: fix recursive pci_lock_rescan_remove locking in EEH event handling 2026-01-08 17:56:53 +05:30
eeh_event.c treewide: Replace kmalloc with kmalloc_obj for non-scalar types 2026-02-21 01:02:28 -08:00
eeh_pe.c powerpc/eeh: fix recursive pci_lock_rescan_remove locking in EEH event handling 2026-01-08 17:56:53 +05:30
eeh_sysfs.c powerpc: use sysfs_emit{_at} in sysfs show functions 2026-06-02 11:24:32 +05:30
eeh.c powerpc/eeh: Export eeh_unfreeze_pe() 2025-07-26 13:07:52 +05:30
entry_32.S powerpc/32: Restore disabling of interrupts at interrupt/syscall exit 2025-12-22 18:25:07 +05:30
epapr_hcalls.S powerpc/4xx: Remove CONFIG_BOOKE_OR_40x 2024-06-28 22:28:48 +10:00
epapr_paravirt.c asm-generic: introduce text-patching.h 2024-11-07 14:25:15 -08:00
exceptions-64e.S powerpc/64e: drop unused TLB miss handlers 2024-07-12 15:52:15 -07:00
exceptions-64s.S powerpc/cell: Remove support for IBM Cell Blades 2025-02-26 21:15:07 +05:30
fadump.c powerpc/fadump: define MIN_RMA in bytes rather than MB 2026-06-16 15:08:25 +05:30
firmware.c powerpc: Export kvm_guest static key, for bcachefs six locks 2024-01-01 11:47:38 -05:00
fpu.S powerpc: Don't clobber f0/vs0 during fp|altivec register save 2023-11-28 23:04:43 +11:00
head_8xx.S powerpc/8xx: Remove left-over instruction and comments in DataStoreTLBMiss handler 2025-09-15 13:48:22 +05:30
head_32.h powerpc: Remove core support for 40x 2024-06-28 22:28:47 +10:00
head_44x.S powerpc/44x: Introduce _PAGE_READ and remove _PAGE_USER 2023-10-19 17:12:46 +11:00
head_64.S powerpc/64s: Fix unnecessary copy to 0 when kernel is booted at address 0 2024-06-23 11:54:13 +10:00
head_85xx.S powerpc/e500: Always use 64 bits PTE 2026-03-04 11:05:06 +05:30
head_book3s_32.S powerpc/32s: Fix segments setup when TASK_SIZE is not a multiple of 256M 2026-01-07 09:31:04 +05:30
head_booke.h powerpc: Replace __ASSEMBLY__ with __ASSEMBLER__ in non-uapi headers 2025-09-01 13:23:29 +05:30
hw_breakpoint_constraints.c powerpc/watchpoint: Disable pagefaults when getting user instruction 2023-09-18 12:23:47 +10:00
hw_breakpoint.c powerpc/watchpoints: Annotate atomic context in more places 2023-09-18 12:23:47 +10:00
idle_6xx.S
idle_64e.S
idle_85xx.S
idle_book3s.S
idle.c treewide: const qualify ctl_tables where applicable 2025-01-28 13:48:37 +01:00
ima_arch.c powerpc/ima: Drop unnecessary check for CONFIG_MODULE_SIG 2026-03-08 08:26:08 -04:00
interrupt_64.S powerpc/64: Set task pt_regs->link to the LR value on scv entry 2024-02-05 22:43:19 +11:00
interrupt.c powerpc: Restore KUAP registers on syscall restart exit 2026-06-16 15:07:40 +05:30
io.c powerpc/io: Use standard barrier macros in io.c 2025-02-26 21:15:09 +05:30
iomap.c
iommu.c powerpc: use sysfs_emit{_at} in sysfs show functions 2026-06-02 11:24:32 +05:30
irq_64.c work around gcc bugs with 'asm goto' with outputs 2024-02-09 15:57:48 -08:00
irq.c powerpc: Use cpumask_next_wrap instead 2026-06-02 11:24:31 +05:30
isa-bridge.c mm: Introduce vmap_page_range() to map pages in PCI address space 2024-03-11 16:58:10 +01:00
jump_label.c asm-generic: introduce text-patching.h 2024-11-07 14:25:15 -08:00
kdebugfs.c
kgdb.c powerpc: kgdb: fix kernel-doc warnings 2026-04-01 09:21:06 +05:30
kprobes-ftrace.c kprobe/ftrace: bail out if ftrace was killed 2024-05-16 07:23:30 +09:00
kprobes.c powerpc updates for 6.13 2024-11-23 10:44:31 -08:00
kvm_emul.S
kvm.c powerpc/kvm: Fix ifdef to remove build warning 2025-08-20 14:03:44 +05:30
l2cr_6xx.S
legacy_serial.c serial: 8250: sanitize uart_port::serial_{in,out}() types 2025-06-17 13:42:34 +02:00
Makefile powerpc/audit: Convert powerpc to AUDIT_ARCH_COMPAT_GENERIC 2026-04-01 09:21:06 +05:30
mce_power.c
mce.c
misc_32.S powerpc/32: Replace mulhdu() by mul_u64_u64_shr() 2024-12-10 08:15:30 +05:30
misc_64.S powerpc/64: Remove maple platform 2024-10-29 23:01:52 +11:00
misc.S powerpc: replace #include <asm/export.h> with #include <linux/export.h> 2023-08-16 23:54:48 +10:00
module_32.c asm-generic: introduce text-patching.h 2024-11-07 14:25:15 -08:00
module_64.c powerpc64/modules: replace stub allocation sentinel with an explicit counter 2025-09-15 16:40:52 +05:30
module.c powerpc updates for 6.10 2024-05-17 09:05:46 -07:00
msi.c
note.S
nvram_64.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
optprobes_head.S
optprobes.c asm-generic: introduce text-patching.h 2024-11-07 14:25:15 -08:00
paca.c docs: move powerpc under arch 2023-10-10 13:35:55 -06:00
pci_32.c mm/memblock: add memblock_alloc_or_panic interface 2025-01-25 20:22:38 -08:00
pci_64.c
pci_dn.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
pci_of_scan.c powerpc/pci: Initialize msi_addr_mask for OF-created PCI devices 2026-03-03 10:29:15 -06:00
pci-common.c PCI: Make pci_sriov_resource_alignment() pci_dev const 2026-06-23 12:08:51 -05:00
pci-hotplug.c PCI: pnv_php: Fix surprise plug detection and recovery 2025-07-26 13:09:15 +05:30
pmc.c powerpc/85xx: Mark some functions static and add missing includes to fix no previous prototype error 2023-08-23 15:55:21 +10:00
ppc_save_regs.S powerpc: update ppc_save_regs to save current r1 in pt_regs 2023-06-19 17:37:14 +10:00
proc_powerpc.c powerpc: Replace strcpy() with strscpy() in proc_ppc64_init() 2025-05-15 09:54:54 +05:30
process.c powerpc/64s: do not re-activate batched TLB flush 2026-01-20 19:24:32 -08:00
prom_entry_64.S powerpc/64: Rename entry_64.S to prom_entry_64.S 2023-06-15 14:04:19 +10:00
prom_init_check.sh powerpc/prom_init: Fix shellcheck warnings 2025-08-20 14:05:18 +05:30
prom_init.c powerpc/fadump: define MIN_RMA in bytes rather than MB 2026-06-16 15:08:25 +05:30
prom_parse.c
prom.c powerpc/crash: use generic crashkernel reservation 2025-03-16 22:30:48 -07:00
reloc_32.S
reloc_64.S
rethook.c powerpc: Replace kretprobe code with rethook on powerpc 2024-09-05 22:25:36 +10:00
rtas_entry.S
rtas_flash.c powerpc: rtas: use lock guard for mutex 2025-06-23 09:57:10 +05:30
rtas_pci.c powerpc/rtas_pci: rename and properly expose config access APIs 2023-11-28 21:49:45 +11:00
rtas-proc.c powerpc/rtas: Fix ppc_rtas_rmo_buf_show() kernel-doc 2023-11-07 13:13:45 +11:00
rtas-rtc.c
rtas.c powerpc/pseries: Define HVPIPE specific macros 2025-09-15 13:38:40 +05:30
rtasd.c powerpc/pseries: Define HVPIPE specific macros 2025-09-15 13:38:40 +05:30
secure_boot.c integrity: Make arch_ima_get_secureboot integrity-wide 2026-03-05 11:10:08 -05:00
security.c powerpc: use sysfs_emit{_at} in sysfs show functions 2026-06-02 11:24:32 +05:30
secvar-ops.c
secvar-sysfs.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
setup_32.c mm/memblock: add memblock_alloc_or_panic interface 2025-01-25 20:22:38 -08:00
setup_64.c powerpc/64: Drop unnecessary 'rc' variable 2025-08-20 13:54:05 +05:30
setup-common.c ppc/fadump: invoke kmsg_dump in fadump panic path 2026-06-02 11:24:32 +05:30
setup.h powerpc/4xx: Remove CONFIG_BOOKE_OR_40x 2024-06-28 22:28:48 +10:00
signal_32.c powerpc/signal32: Force inlining of __unsafe_save_user_regs() and save_tm_user_regs_unsafe() 2023-06-09 23:29:51 +10:00
signal_64.c
signal.c powerpc: Remove unused functions 2026-05-20 06:57:14 +05:30
signal.h powerpc: Replace GPL 2.0+ README.legal boilerplate with SPDX 2023-09-19 20:05:58 +10:00
smp-tbsync.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
smp.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
stacktrace.c powerpc: Replace kretprobe code with rethook on powerpc 2024-09-05 22:25:36 +10:00
static_call.c powerpc/static_call: Implement inline static calls 2025-02-26 21:09:43 +05:30
suspend.c
switch.S powerpc: Fix 'intra_function_call not a direct call' warning 2025-03-10 10:00:17 +05:30
swsusp_32.S
swsusp_64.c powerpc/suspend: Add prototype for do_after_copyback() 2023-11-30 13:15:49 +11:00
swsusp_85xx.S
swsusp_asm64.S
swsusp.c
sys_ppc32.c fs: fix archiecture-specific compat_ftruncate64 2026-03-23 12:41:57 +01:00
syscall.c powerpc: Enable GENERIC_ENTRY feature 2026-05-20 06:57:14 +05:30
syscalls.c
sysfs.c powerpc: use sysfs_emit{_at} in sysfs show functions 2026-06-02 11:24:32 +05:30
systbl.c
tau_6xx.c powerpc, workqueue: Use alloc_ordered_workqueue() to create ordered workqueues 2023-05-08 13:52:27 -10:00
time.c powerpc/vtime: Initialize starttime at boot for native accounting 2026-07-15 08:04:13 +05:30
tm.S powerpc: replace #include <asm/export.h> with #include <linux/export.h> 2023-08-16 23:54:48 +10:00
traps.c powerpc: rename arch_irq_disabled_regs 2026-05-20 06:57:13 +05:30
ucall.S powerpc: replace #include <asm/export.h> with #include <linux/export.h> 2023-08-16 23:54:48 +10:00
udbg_16550.c powerpc/64: Remove maple platform 2024-10-29 23:01:52 +11:00
udbg.c powerpc: Remove UDBG_RTAS_CONSOLE 2025-02-26 21:15:09 +05:30
uprobes.c
vdso.c Convert 'alloc_obj' family to use the new default GFP_KERNEL argument 2026-02-21 17:09:51 -08:00
vdso32_wrapper.S powerpc/vdso: Mark the vDSO code read-only after init 2024-12-18 13:46:38 +05:30
vdso64_wrapper.S powerpc/vdso: Mark the vDSO code read-only after init 2024-12-18 13:46:38 +05:30
vecemu.c
vector.S powerpc: Don't clobber f0/vs0 during fp|altivec register save 2023-11-28 23:04:43 +11:00
vmlinux.lds.S kbuild: Split .modinfo out from ELF_DETAILS 2026-02-26 11:50:19 -07:00
watchdog.c powerpc: rename arch_irq_disabled_regs 2026-05-20 06:57:13 +05:30