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Boqun Feng 7d40c0f70d arm64: PCI: Support root bridge preparation for Hyper-V 
Currently at root bridge preparation, the corresponding ACPI device will
be set as the companion, however for a Hyper-V virtual PCI root bridge,
there is no corresponding ACPI device, because a Hyper-V virtual PCI
root bridge is discovered via VMBus rather than ACPI table. In order to
support this, we need to make pcibios_root_bridge_prepare() work with
cfg->parent being NULL.

Use a NULL pointer as the ACPI device if there is no corresponding ACPI
device, and this is fine because: 1) ACPI_COMPANION_SET() can work with
the second parameter being NULL, 2) semantically, if a NULL pointer is
set via ACPI_COMPANION_SET(), ACPI_COMPANION() (the read API for this
field) will return NULL, and since ACPI_COMPANION() may return NULL, so
users must have handled the cases where it returns NULL, and 3) since
there is no corresponding ACPI device, it would be wrong to use any
other value here.

Link: https://lore.kernel.org/r/20210726180657.142727-5-boqun.feng@gmail.com
Signed-off-by: Boqun Feng <boqun.feng@gmail.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
 		2021-08-23 10:59:26 +01:00
..
probes arm64 updates for 5.14 2021-06-28 14:04:24 -07:00
vdso arm64/vdso: Discard .note.gnu.property sections in vDSO 2021-04-30 18:25:39 +01:00
vdso32 arm64: vdso32: drop -no-integrated-as flag 2021-04-23 14:17:50 +01:00
.gitignore .gitignore: add SPDX License Identifier 2020-03-25 11:50:48 +01:00
Makefile Merge branch 'for-next/insn' into for-next/core 2021-06-24 14:03:24 +01:00
acpi.c arm64: acpi: Map EFI_MEMORY_WT memory as Normal-NC 2021-06-01 18:53:53 +01:00
acpi_numa.c arm64, numa: Change the numa init functions name to be generic 2021-01-14 15:08:54 -08:00
acpi_parking_protocol.c arm64: use function_nocfi with __pa_symbol 2021-04-08 16:04:22 -07:00
alternative.c arm64: Rename arm64-internal cache maintenance functions 2021-05-25 19:27:49 +01:00
armv8_deprecated.c arm64: uaccess: rename privileged uaccess routines 2020-12-02 19:49:10 +00:00
asm-offsets.c ARM: 2021-06-28 15:40:51 -07:00
cacheinfo.c arm64 updates for 5.3: 2019-07-08 09:54:55 -07:00
cpu-reset.S arm64: Use INIT_SCTLR_EL1_MMU_OFF to disable the MMU on CPU restart 2021-03-18 15:51:07 +00:00
cpu-reset.h arm64: add __nocfi to functions that jump to a physical address 2021-04-08 16:04:22 -07:00
cpu_errata.c arm64: kernel: disable CNP on Carmel 2021-03-25 10:00:23 +00:00
cpu_ops.c arm64: Introduce get_cpu_ops() helper function 2020-03-24 17:24:19 +00:00
cpufeature.c Merge branch 'for-next/insn' into for-next/core 2021-06-24 14:03:24 +01:00
cpuidle.c arm64: kernel: Update the stale comment 2021-05-06 12:26:26 +01:00
cpuinfo.c arm64: cpuinfo: Split AArch32 registers out into a separate struct 2021-06-11 13:25:40 +01:00
crash_core.c arm64/crash_core: Export TCR_EL1.T1SZ in vmcoreinfo 2020-07-02 17:56:49 +01:00
crash_dump.c arm64: kdump: update ppos when reading elfcorehdr 2021-03-22 12:46:38 +00:00
debug-monitors.c arm64: expose FAR_EL1 tag bits in siginfo 2020-11-23 18:17:39 +00:00
efi-entry.S arm64: Rename arm64-internal cache maintenance functions 2021-05-25 19:27:49 +01:00
efi-header.S arm64: head: tidy up the Image header definition 2020-11-17 16:14:20 +00:00
efi-rt-wrapper.S Merge branch 'for-next/scs' into for-next/core 2020-05-28 18:03:40 +01:00
efi.c treewide: Convert macro and uses of __section(foo) to __section("foo") 2020-10-25 14:51:49 -07:00
entry-common.c arm64: entry: make NMI entry/exit functions static 2021-06-07 11:35:56 +01:00
entry-fpsimd.S arm64/sve: Skip flushing Z registers with 128 bit vectors 2021-05-26 20:04:28 +01:00
entry-ftrace.S arm64: rename S_FRAME_SIZE to PT_REGS_SIZE 2021-01-13 15:09:06 +00:00
entry.S Merge branch 'for-next/entry' into for-next/core 2021-06-24 14:01:55 +01:00
fpsimd.c arm64/sve: Skip flushing Z registers with 128 bit vectors 2021-05-26 20:04:28 +01:00
ftrace.c arm64: insn: decouple patching from insn code 2021-06-11 11:19:27 +01:00
head.S Merge branch 'for-next/mm' into for-next/core 2021-06-24 14:04:33 +01:00
hibernate-asm.S arm64: Rename arm64-internal cache maintenance functions 2021-05-25 19:27:49 +01:00
hibernate.c arm64: Rename arm64-internal cache maintenance functions 2021-05-25 19:27:49 +01:00
hw_breakpoint.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
hyp-stub.S Merge remote-tracking branch 'arm64/for-next/vhe-only' into kvmarm-master/next 2021-04-13 15:42:40 +01:00
idle.c Merge branch 'for-next/entry' into for-next/core 2021-06-24 14:01:55 +01:00
idreg-override.c arm64: Rename arm64-internal cache maintenance functions 2021-05-25 19:27:49 +01:00
image-vars.h arm64: Rename arm64-internal cache maintenance functions 2021-05-25 19:27:49 +01:00
image.h arm64: get rid of TEXT_OFFSET 2020-09-07 15:00:52 +01:00
io.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
irq.c arm64: irq: allow FIQs to be handled 2021-03-24 20:19:30 +00:00
jump_label.c arm64: insn: decouple patching from insn code 2021-06-11 11:19:27 +01:00
kaslr.c arm64: Rename arm64-internal cache maintenance functions 2021-05-25 19:27:49 +01:00
kexec_image.c arm64: kexec_file: Fix sparse warning 2020-11-10 13:11:44 +00:00
kgdb.c arm64: insn: decouple patching from insn code 2021-06-11 11:19:27 +01:00
kuser32.S docs: arm: convert docs to ReST and rename to *.rst 2019-07-15 09:20:24 -03:00
machine_kexec.c set_memory: allow querying whether set_direct_map_*() is actually enabled 2021-07-08 11:48:20 -07:00
machine_kexec_file.c arm64: Use common of_kexec_alloc_and_setup_fdt() 2021-03-08 12:06:29 -07:00
module-plts.c arm64: improve whitespace 2021-02-04 13:59:49 +00:00
module.c arm64: kaslr: support randomized module area with KASAN_VMALLOC 2021-03-29 12:35:05 +01:00
mte.c arm64: mte: Sync tags for pages where PTE is untagged 2021-06-22 09:38:50 +01:00
paravirt.c x86/paravirt: Switch time pvops functions to use static_call() 2021-03-11 16:17:52 +01:00
patching.c Merge branch 'for-next/insn' into for-next/core 2021-06-24 14:03:24 +01:00
pci.c arm64: PCI: Support root bridge preparation for Hyper-V 2021-08-23 10:59:26 +01:00
perf_callchain.c arm64: stacktrace: Relax frame record alignment requirement to 8 bytes 2021-05-26 20:01:17 +01:00
perf_event.c arm64: perf: Simplify EVENT ATTR macro in perf_event.c 2021-06-11 11:18:41 +01:00
perf_regs.c perf/arch: Remove perf_sample_data::regs_user_copy 2020-11-09 18:12:34 +01:00
pointer_auth.c arm64: pac: Optimize kernel entry/exit key installation code paths 2021-04-13 17:31:44 +01:00
process.c ARM development updates for 5.14-rc1: 2021-07-06 11:52:58 -07:00
proton-pack.c Merge remote-tracking branch 'arm64/for-next/fixes' into for-next/core 2020-12-09 18:04:55 +00:00
psci.c arm64: use function_nocfi with __pa_symbol 2021-04-08 16:04:22 -07:00
ptrace.c arm64: Change the on_*stack functions to take a size argument 2021-05-26 20:01:17 +01:00
reloc_test_core.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500 2019-06-19 17:09:55 +02:00
reloc_test_syms.S arm64: kernel: Convert to modern annotations for assembly functions 2020-05-04 12:46:03 +01:00
relocate_kernel.S arm64: kexec: arm64_relocate_new_kernel don't use x0 as temp 2021-01-27 15:41:12 +00:00
return_address.c arm64: stacktrace: Make stack walk callback consistent with generic code 2020-09-18 14:24:16 +01:00
sdei.c Merge branch 'for-next/entry' into for-next/core 2021-06-24 14:01:55 +01:00
setup.c arm64: convert to setup_initial_init_mm() 2021-07-08 11:48:21 -07:00
signal.c arm64: Kill 32-bit applications scheduled on 64-bit-only CPUs 2021-06-11 13:25:41 +01:00
signal32.c arm64: compat: Always use sigpage for sigreturn trampoline 2020-06-23 14:56:24 +01:00
sigreturn32.S arm64: compat: Split kuser32 2019-04-23 18:01:57 +01:00
sleep.S kasan: remove redundant config option 2021-04-16 16:10:36 -07:00
smccc-call.S arm64: smccc: Support SMCCC v1.3 SVE register saving hint 2021-06-08 14:00:12 +01:00
smp.c arm64 updates for 5.14 2021-06-28 14:04:24 -07:00
smp_spin_table.c arm64: Rename arm64-internal cache maintenance functions 2021-05-25 19:27:49 +01:00
stacktrace.c arm64: stacktrace: use %pSb for backtrace printing 2021-07-08 11:48:22 -07:00
suspend.c arm64: suspend: Use cpuidle context helpers in cpu_suspend() 2021-06-17 18:00:39 +01:00
sys.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 234 2019-06-19 17:09:07 +02:00
sys32.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 452 2019-06-19 17:09:08 +02:00
sys_compat.c arm64: Rename arm64-internal cache maintenance functions 2021-05-25 19:27:49 +01:00
syscall.c arm64: entry: Enable random_kstack_offset support 2021-04-08 14:12:19 +02:00
time.c arm64: time: Replace <linux/clk-provider.h> by <linux/of_clk.h> 2020-02-12 17:26:38 +00:00
topology.c arch_topology: Allow multiple entities to provide sched_freq_tick() callback 2021-03-10 10:55:37 +05:30
trace-events-emulation.h
…
traps.c Merge branch 'for-next/insn' into for-next/core 2021-06-24 14:03:24 +01:00
vdso-wrap.S arm64: do not descend to vdso directories twice 2021-01-20 12:18:46 +00:00
vdso.c Merge branches 'for-next/misc', 'for-next/kselftest', 'for-next/xntable', 'for-next/vdso', 'for-next/fiq', 'for-next/epan', 'for-next/kasan-vmalloc', 'for-next/fgt-boot-init', 'for-next/vhe-only' and 'for-next/neon-softirqs-disabled', remote-tracking branch 'arm64/for-next/perf' into for-next/core 2021-04-15 14:00:38 +01:00
vdso32-wrap.S arm64: do not descend to vdso directories twice 2021-01-20 12:18:46 +00:00
vmlinux.lds.S KVM: arm64: Page-align the .hyp sections 2021-03-19 12:02:18 +00:00