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mirror of https://github.com/edk2-porting/linux-next.git synced 2024-12-24 13:13:57 +08:00
linux-next/drivers/pci
Matt Domsch 0584396157 PCI: PCIe AER: honor ACPI HEST FIRMWARE FIRST mode
Feedback from Hidetoshi Seto and Kenji Kaneshige incorporated.  This
correctly handles PCI-X bridges, PCIe root ports and endpoints, and
prints debug messages when invalid/reserved types are found in the
HEST.  PCI devices not in domain/segment 0 are not represented in
HEST, thus will be ignored.

Today, the PCIe Advanced Error Reporting (AER) driver attaches itself
to every PCIe root port for which BIOS reports it should, via ACPI
_OSC.

However, _OSC alone is insufficient for newer BIOSes.  Part of ACPI
4.0 is the new APEI (ACPI Platform Error Interfaces) which is a way
for OS and BIOS to handshake over which errors for which components
each will handle.  One table in ACPI 4.0 is the Hardware Error Source
Table (HEST), where BIOS can define that errors for certain PCIe
devices (or all devices), should be handled by BIOS ("Firmware First
mode"), rather than be handled by the OS.

Dell PowerEdge 11G server BIOS defines Firmware First mode in HEST, so
that it may manage such errors, log them to the System Event Log, and
possibly take other actions.  The aer driver should honor this, and
not attach itself to devices noted as such.

Furthermore, Kenji Kaneshige reminded us to disallow changing the AER
registers when respecting Firmware First mode.  Platform firmware is
expected to manage these, and if changes to them are allowed, it could
break that firmware's behavior.

The HEST parsing code may be replaced in the future by a more
feature-rich implementation.  This patch provides the minimum needed
to prevent breakage until that implementation is available.

Reviewed-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com>
Reviewed-by: Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>
Signed-off-by: Matt Domsch <Matt_Domsch@dell.com>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
2009-11-04 13:06:25 -08:00
..
hotplug PCI: pciehp: prevent unnecessary power off 2009-11-04 09:02:35 -08:00
pcie PCI: PCIe AER: honor ACPI HEST FIRMWARE FIRST mode 2009-11-04 13:06:25 -08:00
.gitignore
access.c PCI: Add pci_bus_set_ops 2009-06-16 14:29:33 -07:00
bus.c PCI AER: support Multiple Error Received and no error source id 2009-06-16 14:30:13 -07:00
dmar.c intel-iommu: Decode (and ignore) RHSA entries 2009-09-24 12:19:39 -07:00
hotplug-pci.c
hotplug.c
htirq.c Merge branch 'x86/apic' into irq/numa 2009-05-12 12:17:36 +02:00
intel-iommu.c intel-iommu: Yet another BIOS workaround: Isoch DMAR unit with no TLB space 2009-09-30 09:12:17 -07:00
intr_remapping.c Merge git://git.infradead.org/iommu-2.6 2009-09-23 10:06:10 -07:00
intr_remapping.h Intel-IOMMU, intr-remap: source-id checking 2009-06-23 22:09:17 +01:00
iov.c PCI SR-IOV: correct broken resource alignment calculations 2009-08-30 08:37:25 -07:00
iova.c intel-iommu: Remove superfluous iova_alloc_lock from IOVA code 2009-07-15 08:17:02 +01:00
irq.c PCI: struct device - replace bus_id with dev_name(), dev_set_name() 2009-01-07 11:12:23 -08:00
Kconfig PCI: initialize and release SR-IOV capability 2009-03-20 10:48:22 -07:00
legacy.c PCI: disable pci_find_device warnings when deprecated pci functions are enabled 2009-09-09 13:29:25 -07:00
Makefile PCI: disable pci_find_device warnings when deprecated pci functions are enabled 2009-09-09 13:29:25 -07:00
msi.c PCI MSI: Style cleanups 2009-09-09 13:29:35 -07:00
msi.h PCI MSI: shorten PCI_MSIX_ENTRY_* symbol names 2009-06-29 12:15:19 -07:00
pci-acpi.c PCI / ACPI PM: Propagate wake-up enable for devices w/o ACPI support 2009-09-09 14:19:24 -07:00
pci-driver.c Merge branch 'linux-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jbarnes/pci-2.6 2009-09-16 07:49:54 -07:00
pci-stub.c PCI: pci-stub: add pci_stub.ids parameter 2009-09-09 13:44:34 -07:00
pci-sysfs.c PCI: expose function reset capability in sysfs 2009-09-09 13:29:24 -07:00
pci.c PCI: acs p2p upsteram forwarding enabling 2009-11-04 08:47:25 -08:00
pci.h PCI: acs p2p upsteram forwarding enabling 2009-11-04 08:47:25 -08:00
probe.c PCI: PCIe AER: honor ACPI HEST FIRMWARE FIRST mode 2009-11-04 13:06:25 -08:00
proc.c PCI: define PCI resource names in an 'enum' 2009-01-07 11:13:01 -08:00
quirks.c PCI: determine CLS more intelligently 2009-11-04 08:47:10 -08:00
remove.c PCI: eliminate redundant pci_stop_dev() call from pci_destroy_dev() 2009-06-11 12:04:19 -07:00
rom.c PCI: fix rom.c kernel-doc warning 2009-02-13 12:01:56 -08:00
search.c PCI: disable pci_find_device warnings when deprecated pci functions are enabled 2009-09-09 13:29:25 -07:00
setup-bus.c PCI: print resources consistently with %pRt 2009-11-04 08:47:18 -08:00
setup-irq.c
setup-res.c PCI: print resources consistently with %pRt 2009-11-04 08:47:18 -08:00
slot.c PCI: fix kernel-doc warnings 2009-06-29 12:13:56 -07:00
syscall.c headers: smp_lock.h redux 2009-07-12 12:22:34 -07:00