Messages in this thread | | | From | "Desnes A. Nunes do Rosario" <> | Subject | [PATCH 0/2] Silent PCI realignment messages during boot | Date | Wed, 14 Mar 2018 13:34:53 -0300 |
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This patchset introduces PCI_DEV_FLAGS_QUIET_PCI_REALIGN attribute in pci_dev_flags which informs the pci subsystem to suppress all realignment messages.
Powerpc has aligned all of its PCI resources to its PAGE_SIZE, and this feature can be easily used on any other arch through the __weak pcibios_default_alignment() interface.
However, since all PCI resources will be now realigned during boot, the following messages will not only flood the system logs, but can be inter- preted as a false positive for total PCI failure on the system.
[root@system user]# dmesg | grep -i disabling [ 0.692270] pci 0000:00:00.0: Disabling memory decoding and releasing memory resources [ 0.692324] pci 0000:00:00.0: disabling bridge mem windows [ 0.729134] pci 0001:00:00.0: Disabling memory decoding and releasing memory resources [ 0.737352] pci 0001:00:00.0: disabling bridge mem windows [ 0.776295] pci 0002:00:00.0: Disabling memory decoding and releasing memory resources [ 0.784509] pci 0002:00:00.0: disabling bridge mem windows ... and goes on for all PCI devices ...
Thus, this patchset provides a way for drivers to silent these messages if the PCI_DEV_FLAGS_QUIET_PCI_REALIGN is turned on. Moreover, it also tweaks this flag during boot on powerpc.
Fixes: 38274637699 ("powerpc/powernv: Override pcibios_default_alignment() to force PCI devices to be page aligned") Signed-off-by: Desnes A. Nunes do Rosario <desnesn@linux.vnet.ibm.com>
Desnes A. Nunes do Rosario (2): pci: Addition of PCI_DEV_FLAGS_QUIET_PCI_REALIGN attribute to the PCI subsystem powerpc/powernv: Tweak PCI_DEV_FLAGS_QUIET_PCI_REALIGN on/off during boot
arch/powerpc/platforms/powernv/pci.c | 14 ++++++++++++++ drivers/pci/pci.c | 3 ++- drivers/pci/setup-res.c | 3 ++- include/linux/pci.h | 2 ++ 4 files changed, 20 insertions(+), 2 deletions(-)
-- 2.14.3
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