Narayana Murty N 33bc69cf66 powerpc/eeh: Fix missing PE bridge reconfiguration during VFIO EEH recovery ... VFIO EEH recovery for PCI passthrough devices fails on PowerNV and pseries platforms due to missing host-side PE bridge reconfiguration. In the current implementation, eeh_pe_configure() only performs RTAS or OPAL-based bridge reconfiguration for native host devices, but skips it entirely for PEs managed through VFIO in guest passthrough scenarios. This leads to incomplete EEH recovery when a PCI error affects a passthrough device assigned to a QEMU/KVM guest. Although VFIO triggers the EEH recovery flow through VFIO_EEH_PE_ENABLE ioctl, the platform-specific bridge reconfiguration step is silently bypassed. As a result, the PE's config space is not fully restored, causing subsequent config space access failures or EEH freeze-on-access errors inside the guest. This patch fixes the issue by ensuring that eeh_pe_configure() always invokes the platform's configure_bridge() callback (e.g., pseries_eeh_phb_configure_bridge) even for VFIO-managed PEs. This ensures that RTAS or OPAL calls to reconfigure the PE bridge are correctly issued on the host side, restoring the PE's configuration space after an EEH event. This fix is essential for reliable EEH recovery in QEMU/KVM guests using VFIO PCI passthrough on PowerNV and pseries systems. Tested with: - QEMU/KVM guest using VFIO passthrough (IBM Power9,(lpar)Power11 host) - Injected EEH errors with pseries EEH errinjct tool on host, recovery verified on qemu guest. - Verified successful config space access and CAP_EXP DevCtl restoration after recovery Fixes: 212d16cdca ("powerpc/eeh: EEH support for VFIO PCI device") Signed-off-by: Narayana Murty N <nnmlinux@linux.ibm.com> Reviewed-by: Vaibhav Jain <vaibhav@linux.ibm.com> Reviewed-by: Ganesh Goudar <ganeshgr@linux.ibm.com> Signed-off-by: Madhavan Srinivasan <maddy@linux.ibm.com> Link: https://patch.msgid.link/20250508062928.146043-1-nnmlinux@linux.ibm.com		2025-06-13 12:30:48 +05:30
..
ptrace	seccomp: remove the 'sd' argument from __secure_computing()	2025-02-10 09:26:22 -08:00
syscalls	fs: add open_tree_attr()	2025-02-12 12:12:28 +01:00
trace	powerpc64/ftrace: fix clobbered r15 during livepatching	2025-04-29 11:03:07 +05:30
vdso	powerpc/vdso: Fix build of VDSO32 with pcrel	2025-06-13 12:30:15 +05:30
.gitignore
85xx_entry_mapping.S
align.c
asm-offsets.c	powerpc/vdso: Switch to generic storage implementation	2025-02-21 09:54:02 +01:00
audit.c
audit_32.h
btext.c
cacheinfo.c	powerpc: Constify struct kobj_type	2024-09-05 22:25:36 +10:00
cacheinfo.h
compat_audit.c
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
cpu_setup_ppc970.S
cpu_specs.h	powerpc: Remove core support for 40x	2024-06-28 22:28:47 +10:00
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
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	powerpc: Remove some Cell leftovers	2025-02-26 21:15:07 +05:30
dma-mask.c
dma-swiotlb.c
dt_cpu_ftrs.c	mm/memblock: add memblock_alloc_or_panic interface	2025-01-25 20:22:38 -08:00
early_32.c
eeh.c	powerpc/eeh: Fix missing PE bridge reconfiguration during VFIO EEH recovery	2025-06-13 12:30:48 +05:30
eeh_cache.c
eeh_driver.c	powerpc/eeh: Permanently disable the removed device	2024-04-29 23:51:15 +10:00
eeh_event.c
eeh_pe.c	powerpc/eeh: avoid possible crash when edev->pdev changes	2024-06-23 11:54:27 +10:00
eeh_sysfs.c
entry_32.S	powerpc: Replace CONFIG_4xx with CONFIG_44x	2024-06-28 22:28:48 +10:00
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	fadump: Use str_yes_no() helper in fadump_show_config()	2025-04-16 22:25:22 +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: Fix kernel DTLB miss on dcbz	2024-10-11 15:53:06 +11:00
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: use contiguous PMD instead of hugepd	2024-07-12 15:52:18 -07:00
head_book3s_32.S	powerpc/603: Inconditionally use task PGDIR in DTLB misses	2024-08-30 21:29:55 +10:00
head_booke.h	powerpc: Remove core support for 40x	2024-06-28 22:28:47 +10:00
hw_breakpoint.c
hw_breakpoint_constraints.c
idle.c	treewide: const qualify ctl_tables where applicable	2025-01-28 13:48:37 +01:00
idle_6xx.S
idle_64e.S
idle_85xx.S
idle_book3s.S
ima_arch.c
interrupt.c	powerpc: enable dynamic preemption	2025-04-16 22:30:22 +05:30
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
io.c	powerpc/io: Use standard barrier macros in io.c	2025-02-26 21:15:09 +05:30
iomap.c
iommu.c	powerpc/iommu: Use str_disabled_enabled() helper	2025-05-15 10:05:06 +05:30
irq.c	powerpc/irq: use seq_put_decimal_ull_width() for decimal values	2024-11-10 22:33:52 +11:00
irq_64.c	work around gcc bugs with 'asm goto' with outputs	2024-02-09 15:57:48 -08:00
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	asm-generic: introduce text-patching.h	2024-11-07 14:25:15 -08:00
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.c
kvm_emul.S
l2cr_6xx.S
legacy_serial.c
Makefile	Kbuild updates for v6.16	2025-06-07 10:05:35 -07:00
mce.c
mce_power.c
misc.S
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
module.c	powerpc updates for 6.10	2024-05-17 09:05:46 -07:00
module_32.c	asm-generic: introduce text-patching.h	2024-11-07 14:25:15 -08:00
module_64.c	powerpc64/ftrace: fix module loading without patchable function entries	2025-04-15 11:40:54 +05:30
msi.c
note.S
nvram_64.c	printk: Add a short description string to kmsg_dump()	2024-07-17 12:35:24 +02:00
optprobes.c	asm-generic: introduce text-patching.h	2024-11-07 14:25:15 -08:00
optprobes_head.S
paca.c	docs: move powerpc under arch	2023-10-10 13:35:55 -06:00
pci-common.c	arch: Rename fbdev header and source files	2024-05-03 17:07:50 +02:00
pci-hotplug.c	powerpc/pci: Hotplug driver bridge support	2024-07-04 23:10:40 +10:00
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
pci_of_scan.c
pmc.c
ppc_save_regs.S
proc_powerpc.c	powerpc: Replace strcpy() with strscpy() in proc_ppc64_init()	2025-05-15 09:54:54 +05:30
process.c	powerpc: Don't use --- in kernel logs	2025-04-29 11:41:38 +05:30
prom.c	powerpc/crash: use generic crashkernel reservation	2025-03-16 22:30:48 -07:00
prom_entry_64.S
prom_init.c	powerpc/prom_init: Fixup missing #size-cells on PowerBook6,7	2025-03-07 19:08:38 +05:30
prom_init_check.sh
prom_parse.c
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-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: Add a char driver for physical-attestation RTAS	2025-04-17 11:42:30 +05:30
rtas_entry.S
rtas_flash.c	powerpc: add missing MODULE_DESCRIPTION() macros	2024-07-04 22:39:20 +10:00
rtas_pci.c	powerpc/rtas_pci: rename and properly expose config access APIs	2023-11-28 21:49:45 +11:00
rtasd.c
secure_boot.c	powerpc: Use str_enabled_disabled() helper function	2024-11-05 20:48:20 +11:00
security.c	asm-generic: introduce text-patching.h	2024-11-07 14:25:15 -08:00
secvar-ops.c
secvar-sysfs.c	powerpc/secvar: Constify 'struct bin_attribute'	2025-02-21 09:20:32 +01:00
setup-common.c	arch, mm: set max_mapnr when allocating memory map for FLATMEM	2025-03-17 22:06:52 -07:00
setup.h	powerpc/4xx: Remove CONFIG_BOOKE_OR_40x	2024-06-28 22:28:48 +10:00
setup_32.c	mm/memblock: add memblock_alloc_or_panic interface	2025-01-25 20:22:38 -08:00
setup_64.c	powerpc/io: Remove PPC_INDIRECT_MMIO	2025-02-26 21:15:08 +05:30
signal.c
signal.h
signal_32.c
signal_64.c
smp-tbsync.c
smp.c	powerpc: Split systemcfg struct definitions out from vdso	2024-11-02 12:37:36 +01:00
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.c
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
sys_ppc32.c
syscall.c	treewide: context_tracking: Rename CONTEXT_* into CT_STATE_*	2024-07-29 07:33:10 +05:30
syscalls.c
sysfs.c	powerpc/machdep: Drop include of dma-mapping.h	2024-10-29 23:01:05 +11:00
systbl.c
tau_6xx.c
time.c	powerpc updates for 6.15	2025-03-27 19:39:08 -07:00
tm.S
traps.c	powerpc: Rely on generic printing of preemption model	2025-03-17 11:23:39 +01:00
ucall.S
udbg.c	powerpc: Remove UDBG_RTAS_CONSOLE	2025-02-26 21:15:09 +05:30
udbg_16550.c	powerpc/64: Remove maple platform	2024-10-29 23:01:52 +11:00
uprobes.c
vdso.c	powerpc/vdso: Switch to generic storage implementation	2025-02-21 09:54:02 +01:00
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	powerpc/vmlinux: Remove etext, edata and end	2025-02-24 12:26:21 +05:30
watchdog.c	powerpc/watchdog: Switch to use hrtimer_setup()	2025-02-18 10:32:31 +01:00