From: gregkh@linuxfoundation.org
To: linux-kernel@vger.kernel.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, kernel test robot <lkp@intel.com>,
Oliver OHalloran <oohall@gmail.com>,
Michael Ellerman <mpe@ellerman.id.au>,
Sasha Levin <sashal@kernel.org>
Subject: [PATCH 4.19 046/120] powerpc/pci: Add ppc_md.discover_phbs()
Date: Mon, 15 Mar 2021 14:56:37 +0100 [thread overview]
Message-ID: <20210315135721.500089603@linuxfoundation.org> (raw)
In-Reply-To: <20210315135720.002213995@linuxfoundation.org>
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
From: Oliver O'Halloran <oohall@gmail.com>
[ Upstream commit 5537fcb319d016ce387f818dd774179bc03217f5 ]
On many powerpc platforms the discovery and initalisation of
pci_controllers (PHBs) happens inside of setup_arch(). This is very early
in boot (pre-initcalls) and means that we're initialising the PHB long
before many basic kernel services (slab allocator, debugfs, a real ioremap)
are available.
On PowerNV this causes an additional problem since we map the PHB registers
with ioremap(). As of commit d538aadc2718 ("powerpc/ioremap: warn on early
use of ioremap()") a warning is printed because we're using the "incorrect"
API to setup and MMIO mapping in searly boot. The kernel does provide
early_ioremap(), but that is not intended to create long-lived MMIO
mappings and a seperate warning is printed by generic code if
early_ioremap() mappings are "leaked."
This is all fixable with dumb hacks like using early_ioremap() to setup
the initial mapping then replacing it with a real ioremap later on in
boot, but it does raise the question: Why the hell are we setting up the
PHB's this early in boot?
The old and wise claim it's due to "hysterical rasins." Aside from amused
grapes there doesn't appear to be any real reason to maintain the current
behaviour. Already most of the newer embedded platforms perform PHB
discovery in an arch_initcall and between the end of setup_arch() and the
start of initcalls none of the generic kernel code does anything PCI
related. On powerpc scanning PHBs occurs in a subsys_initcall so it should
be possible to move the PHB discovery to a core, postcore or arch initcall.
This patch adds the ppc_md.discover_phbs hook and a core_initcall stub that
calls it. The core_initcalls are the earliest to be called so this will
any possibly issues with dependency between initcalls. This isn't just an
academic issue either since on pseries and PowerNV EEH init occurs in an
arch_initcall and depends on the pci_controllers being available, similarly
the creation of pci_dns occurs at core_initcall_sync (i.e. between core and
postcore initcalls). These problems need to be addressed seperately.
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Oliver O'Halloran <oohall@gmail.com>
[mpe: Make discover_phbs() static]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201103043523.916109-1-oohall@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/powerpc/include/asm/machdep.h | 3 +++
arch/powerpc/kernel/pci-common.c | 10 ++++++++++
2 files changed, 13 insertions(+)
diff --git a/arch/powerpc/include/asm/machdep.h b/arch/powerpc/include/asm/machdep.h
index a47de82fb8e2..bda87cbf106d 100644
--- a/arch/powerpc/include/asm/machdep.h
+++ b/arch/powerpc/include/asm/machdep.h
@@ -71,6 +71,9 @@ struct machdep_calls {
int (*pcibios_root_bridge_prepare)(struct pci_host_bridge
*bridge);
+ /* finds all the pci_controllers present at boot */
+ void (*discover_phbs)(void);
+
/* To setup PHBs when using automatic OF platform driver for PCI */
int (*pci_setup_phb)(struct pci_controller *host);
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 88e4f69a09e5..74628aca2bf1 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -1671,3 +1671,13 @@ static void fixup_hide_host_resource_fsl(struct pci_dev *dev)
}
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_MOTOROLA, PCI_ANY_ID, fixup_hide_host_resource_fsl);
DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_FREESCALE, PCI_ANY_ID, fixup_hide_host_resource_fsl);
+
+
+static int __init discover_phbs(void)
+{
+ if (ppc_md.discover_phbs)
+ ppc_md.discover_phbs();
+
+ return 0;
+}
+core_initcall(discover_phbs);
--
2.30.1
next prev parent reply other threads:[~2021-03-15 14:18 UTC|newest]
Thread overview: 138+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-15 13:55 [PATCH 4.19 000/120] 4.19.181-rc1 review gregkh
2021-03-15 13:55 ` [PATCH 4.19 001/120] uapi: nfnetlink_cthelper.h: fix userspace compilation error gregkh
2021-03-15 13:55 ` [PATCH 4.19 002/120] ethernet: alx: fix order of calls on resume gregkh
2021-03-15 13:55 ` [PATCH 4.19 003/120] ath9k: fix transmitting to stations in dynamic SMPS mode gregkh
2021-03-15 13:55 ` [PATCH 4.19 004/120] net: Fix gro aggregation for udp encaps with zero csum gregkh
2021-03-15 13:55 ` [PATCH 4.19 005/120] net: Introduce parse_protocol header_ops callback gregkh
2021-03-15 13:55 ` [PATCH 4.19 006/120] can: skb: can_skb_set_owner(): fix ref counting if socket was closed before setting skb ownership gregkh
2021-03-15 13:55 ` [PATCH 4.19 007/120] can: flexcan: assert FRZ bit in flexcan_chip_freeze() gregkh
2021-03-15 13:55 ` [PATCH 4.19 008/120] can: flexcan: enable RX FIFO after FRZ/HALT valid gregkh
2021-03-15 13:56 ` [PATCH 4.19 009/120] netfilter: x_tables: gpf inside xt_find_revision() gregkh
2021-03-15 13:56 ` [PATCH 4.19 010/120] mt76: dma: do not report truncated frames to mac80211 gregkh
2021-03-15 13:56 ` [PATCH 4.19 011/120] tcp: annotate tp->copied_seq lockless reads gregkh
2021-03-16 9:41 ` Pavel Machek
2021-03-16 9:48 ` Greg KH
2021-03-16 9:49 ` Eric Dumazet
2021-03-15 13:56 ` [PATCH 4.19 012/120] tcp: annotate tp->write_seq " gregkh
2021-03-16 9:50 ` Pavel Machek
2021-03-16 9:52 ` Eric Dumazet
2021-03-16 9:53 ` Pavel Machek
2021-03-16 9:59 ` Eric Dumazet
2021-03-15 13:56 ` [PATCH 4.19 013/120] tcp: add sanity tests to TCP_QUEUE_SEQ gregkh
2021-03-15 13:56 ` [PATCH 4.19 014/120] cifs: return proper error code in statfs(2) gregkh
2021-03-15 13:56 ` [PATCH 4.19 015/120] scripts/recordmcount.{c,pl}: support -ffunction-sections .text.* section names gregkh
2021-03-15 13:56 ` [PATCH 4.19 016/120] Revert "mm, slub: consider rest of partial list if acquire_slab() fails" gregkh
2021-03-15 13:56 ` [PATCH 4.19 017/120] sh_eth: fix TRSCER mask for SH771x gregkh
2021-03-15 13:56 ` [PATCH 4.19 018/120] net: check if protocol extracted by virtio_net_hdr_set_proto is correct gregkh
2021-03-15 13:56 ` [PATCH 4.19 019/120] net: avoid infinite loop in mpls_gso_segment when mpls_hlen == 0 gregkh
2021-03-15 13:56 ` [PATCH 4.19 020/120] net/mlx4_en: update moderation when config reset gregkh
2021-03-15 13:56 ` [PATCH 4.19 021/120] net: stmmac: fix incorrect DMA channel intr enable setting of EQoS v4.10 gregkh
2021-03-15 13:56 ` [PATCH 4.19 022/120] net: sched: avoid duplicates in classes dump gregkh
2021-03-15 13:56 ` [PATCH 4.19 023/120] net: usb: qmi_wwan: allow qmimux add/del with master up gregkh
2021-03-15 13:56 ` [PATCH 4.19 024/120] cipso,calipso: resolve a number of problems with the DOI refcounts gregkh
2021-03-15 13:56 ` [PATCH 4.19 025/120] net: lapbether: Remove netif_start_queue / netif_stop_queue gregkh
2021-03-15 13:56 ` [PATCH 4.19 026/120] net: davicom: Fix regulator not turned off on failed probe gregkh
2021-03-15 13:56 ` [PATCH 4.19 027/120] net: davicom: Fix regulator not turned off on driver removal gregkh
2021-03-15 13:56 ` [PATCH 4.19 028/120] net: qrtr: fix error return code of qrtr_sendmsg() gregkh
2021-03-15 13:56 ` [PATCH 4.19 029/120] net: stmmac: stop each tx channel independently gregkh
2021-03-15 13:56 ` [PATCH 4.19 030/120] net: stmmac: fix watchdog timeout during suspend/resume stress test gregkh
2021-03-15 13:56 ` [PATCH 4.19 031/120] selftests: forwarding: Fix race condition in mirror installation gregkh
2021-03-15 13:56 ` [PATCH 4.19 032/120] perf traceevent: Ensure read cmdlines are null terminated gregkh
2021-03-15 13:56 ` [PATCH 4.19 033/120] s390/cio: return -EFAULT if copy_to_user() fails again gregkh
2021-03-15 13:56 ` [PATCH 4.19 034/120] drm/compat: Clear bounce structures gregkh
2021-03-15 13:56 ` [PATCH 4.19 035/120] drm: meson_drv add shutdown function gregkh
2021-03-15 13:56 ` [PATCH 4.19 036/120] s390/cio: return -EFAULT if copy_to_user() fails gregkh
2021-03-15 13:56 ` [PATCH 4.19 037/120] sh_eth: fix TRSCER mask for R7S9210 gregkh
2021-03-15 13:56 ` [PATCH 4.19 038/120] media: usbtv: Fix deadlock on suspend gregkh
2021-03-15 13:56 ` [PATCH 4.19 039/120] media: v4l: vsp1: Fix uif null pointer access gregkh
2021-03-15 13:56 ` [PATCH 4.19 040/120] media: v4l: vsp1: Fix bru " gregkh
2021-03-15 13:56 ` [PATCH 4.19 041/120] net: phy: fix save wrong speed and duplex problem if autoneg is on gregkh
2021-03-15 13:56 ` [PATCH 4.19 042/120] i2c: rcar: optimize cacheline to minimize HW race condition gregkh
2021-03-15 13:56 ` [PATCH 4.19 043/120] udf: fix silent AED tagLocation corruption gregkh
2021-03-15 13:56 ` [PATCH 4.19 044/120] mmc: mxs-mmc: Fix a resource leak in an error handling path in mxs_mmc_probe() gregkh
2021-03-15 13:56 ` [PATCH 4.19 045/120] mmc: mediatek: fix race condition between msdc_request_timeout and irq gregkh
2021-03-15 13:56 ` gregkh [this message]
2021-03-15 13:56 ` [PATCH 4.19 047/120] powerpc: improve handling of unrecoverable system reset gregkh
2021-03-15 13:56 ` [PATCH 4.19 048/120] powerpc/perf: Record counter overflow always if SAMPLE_IP is unset gregkh
2021-03-15 13:56 ` [PATCH 4.19 049/120] sparc32: Limit memblock allocation to low memory gregkh
2021-03-15 13:56 ` [PATCH 4.19 050/120] sparc64: Use arch_validate_flags() to validate ADI flag gregkh
2021-03-15 13:56 ` [PATCH 4.19 051/120] PCI: xgene-msi: Fix race in installing chained irq handler gregkh
2021-03-15 13:56 ` [PATCH 4.19 052/120] PCI: mediatek: Add missing of_node_put() to fix reference leak gregkh
2021-03-15 13:56 ` [PATCH 4.19 053/120] PCI: Fix pci_register_io_range() memory leak gregkh
2021-03-15 13:56 ` [PATCH 4.19 054/120] i40e: Fix memory leak in i40e_probe gregkh
2021-03-15 13:56 ` [PATCH 4.19 055/120] s390/smp: __smp_rescan_cpus() - move cpumask away from stack gregkh
2021-03-15 13:56 ` [PATCH 4.19 056/120] scsi: libiscsi: Fix iscsi_prep_scsi_cmd_pdu() error handling gregkh
2021-03-15 13:56 ` [PATCH 4.19 057/120] scsi: target: core: Add cmd length set before cmd complete gregkh
2021-03-15 13:56 ` [PATCH 4.19 058/120] scsi: target: core: Prevent underflow for service actions gregkh
2021-03-15 13:56 ` [PATCH 4.19 059/120] ALSA: usb: Add Plantronics C320-M USB ctrl msg delay quirk gregkh
2021-03-15 13:56 ` [PATCH 4.19 060/120] ALSA: hda/hdmi: Cancel pending works before suspend gregkh
2021-03-15 13:56 ` [PATCH 4.19 061/120] ALSA: hda: Drop the BATCH workaround for AMD controllers gregkh
2021-03-15 13:56 ` [PATCH 4.19 062/120] ALSA: hda: Avoid spurious unsol event handling during S3/S4 gregkh
2021-03-15 13:56 ` [PATCH 4.19 063/120] ALSA: usb-audio: Fix "cannot get freq eq" errors on Dell AE515 sound bar gregkh
2021-03-15 13:56 ` [PATCH 4.19 064/120] ALSA: usb-audio: Apply the control quirk to Plantronics headsets gregkh
2021-03-15 13:56 ` [PATCH 4.19 065/120] Revert 95ebabde382c ("capabilities: Dont allow writing ambiguous v3 file capabilities") gregkh
2021-03-15 13:56 ` [PATCH 4.19 066/120] s390/dasd: fix hanging DASD driver unbind gregkh
2021-03-15 13:56 ` [PATCH 4.19 067/120] s390/dasd: fix hanging IO request during " gregkh
2021-03-15 13:56 ` [PATCH 4.19 068/120] mmc: core: Fix partition switch time for eMMC gregkh
2021-03-15 13:57 ` [PATCH 4.19 069/120] mmc: cqhci: Fix random crash when remove mmc module/card gregkh
2021-03-15 13:57 ` [PATCH 4.19 070/120] Goodix Fingerprint device is not a modem gregkh
2021-03-15 13:57 ` [PATCH 4.19 071/120] USB: gadget: u_ether: Fix a configfs return code gregkh
2021-03-15 13:57 ` [PATCH 4.19 072/120] usb: gadget: f_uac2: always increase endpoint max_packet_size by one audio slot gregkh
2021-03-15 13:57 ` [PATCH 4.19 073/120] usb: gadget: f_uac1: stop playback on function disable gregkh
2021-03-15 13:57 ` [PATCH 4.19 074/120] usb: dwc3: qcom: Honor wakeup enabled/disabled state gregkh
2021-03-15 13:57 ` [PATCH 4.19 075/120] USB: usblp: fix a hang in poll() if disconnected gregkh
2021-03-15 13:57 ` [PATCH 4.19 076/120] usb: renesas_usbhs: Clear PIPECFG for re-enabling pipe with other EPNUM gregkh
2021-03-15 13:57 ` [PATCH 4.19 077/120] xhci: Improve detection of device initiated wake signal gregkh
2021-03-15 13:57 ` [PATCH 4.19 078/120] usb: xhci: Fix ASMedia ASM1042A and ASM3242 DMA addressing gregkh
2021-03-15 13:57 ` [PATCH 4.19 079/120] USB: serial: io_edgeport: fix memory leak in edge_startup gregkh
2021-03-15 13:57 ` [PATCH 4.19 080/120] USB: serial: ch341: add new Product ID gregkh
2021-03-15 13:57 ` [PATCH 4.19 081/120] USB: serial: cp210x: add ID for Acuity Brands nLight Air Adapter gregkh
2021-03-15 13:57 ` [PATCH 4.19 082/120] USB: serial: cp210x: add some more GE USB IDs gregkh
2021-03-15 13:57 ` [PATCH 4.19 083/120] usbip: fix stub_dev to check for stream socket gregkh
2021-03-15 13:57 ` [PATCH 4.19 084/120] usbip: fix vhci_hcd " gregkh
2021-03-15 13:57 ` [PATCH 4.19 085/120] usbip: fix vudc " gregkh
2021-03-15 13:57 ` [PATCH 4.19 086/120] usbip: fix stub_dev usbip_sockfd_store() races leading to gpf gregkh
2021-03-15 13:57 ` [PATCH 4.19 087/120] usbip: fix vhci_hcd attach_store() " gregkh
2021-03-15 13:57 ` [PATCH 4.19 088/120] usbip: fix vudc usbip_sockfd_store " gregkh
2021-03-15 13:57 ` [PATCH 4.19 089/120] staging: rtl8192u: fix ->ssid overflow in r8192_wx_set_scan() gregkh
2021-03-15 13:57 ` [PATCH 4.19 090/120] staging: rtl8188eu: prevent ->ssid overflow in rtw_wx_set_scan() gregkh
2021-03-15 13:57 ` [PATCH 4.19 091/120] staging: rtl8712: unterminated string leads to read overflow gregkh
2021-03-15 13:57 ` [PATCH 4.19 092/120] staging: rtl8188eu: fix potential memory corruption in rtw_check_beacon_data() gregkh
2021-03-15 13:57 ` [PATCH 4.19 093/120] staging: ks7010: prevent buffer overflow in ks_wlan_set_scan() gregkh
2021-03-15 13:57 ` [PATCH 4.19 094/120] staging: rtl8712: Fix possible buffer overflow in r8712_sitesurvey_cmd gregkh
2021-03-15 13:57 ` [PATCH 4.19 095/120] staging: rtl8192e: Fix possible buffer overflow in _rtl92e_wx_set_scan gregkh
2021-03-15 13:57 ` [PATCH 4.19 096/120] staging: comedi: addi_apci_1032: Fix endian problem for COS sample gregkh
2021-03-15 13:57 ` [PATCH 4.19 097/120] staging: comedi: addi_apci_1500: Fix endian problem for command sample gregkh
2021-03-15 13:57 ` [PATCH 4.19 098/120] staging: comedi: adv_pci1710: Fix endian problem for AI command data gregkh
2021-03-15 13:57 ` [PATCH 4.19 099/120] staging: comedi: das6402: " gregkh
2021-03-15 13:57 ` [PATCH 4.19 100/120] staging: comedi: das800: " gregkh
2021-03-15 13:57 ` [PATCH 4.19 101/120] staging: comedi: dmm32at: " gregkh
2021-03-15 13:57 ` [PATCH 4.19 102/120] staging: comedi: me4000: " gregkh
2021-03-15 13:57 ` [PATCH 4.19 103/120] staging: comedi: pcl711: " gregkh
2021-03-15 13:57 ` [PATCH 4.19 104/120] staging: comedi: pcl818: " gregkh
2021-03-15 13:57 ` [PATCH 4.19 105/120] sh_eth: fix TRSCER mask for R7S72100 gregkh
2021-03-15 13:57 ` [PATCH 4.19 106/120] NFSv4.2: fix return value of _nfs4_get_security_label() gregkh
2021-03-15 13:57 ` [PATCH 4.19 107/120] block: rsxx: fix error return code of rsxx_pci_probe() gregkh
2021-03-15 13:57 ` [PATCH 4.19 108/120] configfs: fix a use-after-free in __configfs_open_file gregkh
2021-03-15 13:57 ` [PATCH 4.19 109/120] hrtimer: Update softirq_expires_next correctly after __hrtimer_get_next_event() gregkh
2021-03-15 13:57 ` [PATCH 4.19 110/120] stop_machine: mark helpers __always_inline gregkh
2021-03-15 13:57 ` [PATCH 4.19 111/120] include/linux/sched/mm.h: use rcu_dereference in in_vfork() gregkh
2021-03-15 13:57 ` [PATCH 4.19 112/120] prctl: fix PR_SET_MM_AUXV kernel stack leak gregkh
2021-03-15 13:57 ` [PATCH 4.19 113/120] powerpc/64s: Fix instruction encoding for lis in ppc_function_entry() gregkh
2021-03-15 13:57 ` [PATCH 4.19 114/120] binfmt_misc: fix possible deadlock in bm_register_write gregkh
2021-03-15 13:57 ` [PATCH 4.19 115/120] x86/unwind/orc: Disable KASAN checking in the ORC unwinder, part 2 gregkh
2021-03-15 13:57 ` [PATCH 4.19 116/120] hwmon: (lm90) Fix max6658 sporadic wrong temperature reading gregkh
2021-03-15 13:57 ` [PATCH 4.19 117/120] KVM: arm64: Fix exclusive limit for IPA size gregkh
2021-03-15 13:57 ` [PATCH 4.19 118/120] xen/events: reset affinity of 2-level event when tearing it down gregkh
2021-03-15 13:57 ` [PATCH 4.19 119/120] xen/events: dont unmask an event channel when an eoi is pending gregkh
2021-03-15 13:57 ` [PATCH 4.19 120/120] xen/events: avoid handling the same event on two cpus at the same time gregkh
2021-03-15 17:07 ` [PATCH 4.19 000/120] 4.19.181-rc1 review Jon Hunter
2021-03-15 21:38 ` Pavel Machek
2021-03-15 22:57 ` Jason Self
2021-03-16 9:33 ` Naresh Kamboju
2021-03-16 21:13 ` Guenter Roeck
2021-03-17 1:11 ` Samuel Zou
2021-03-17 2:57 ` Ross Schmidt
2021-03-18 11:59 ` Samuel Zou
2021-03-19 9:41 ` Greg KH
2021-03-19 1:50 ` Samuel Zou
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