Thomas Gleixner 4f07508394 x86/pci/xen: Disable PCI/MSI[-X] masking for XEN_HVM guests ... commit 7e0815b3e0 upstream. When a XEN_HVM guest uses the XEN PIRQ/Eventchannel mechanism, then PCI/MSI[-X] masking is solely controlled by the hypervisor, but contrary to XEN_PV guests this does not disable PCI/MSI[-X] masking in the PCI/MSI layer. This can lead to a situation where the PCI/MSI layer masks an MSI[-X] interrupt and the hypervisor grants the write despite the fact that it already requested the interrupt. As a consequence interrupt delivery on the affected device is not happening ever. Set pci_msi_ignore_mask to prevent that like it's done for XEN_PV guests already. Fixes: 809f9267bb ("xen: map MSIs into pirqs") Reported-by: Jeremi Piotrowski <jpiotrowski@linux.microsoft.com> Reported-by: Dusty Mabe <dustymabe@redhat.com> Reported-by: Salvatore Bonaccorso <carnil@debian.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Tested-by: Noah Meyerhans <noahm@debian.org> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/87tuaduxj5.ffs@tglx [nmeyerha@amazon.com: backported to 5.4] Signed-off-by: Noah Meyerhans <nmeyerha@amazon.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		2022-06-06 08:33:48 +02:00
..
acpi.c
amd_bus.c
broadcom_bus.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
bus_numa.c
bus_numa.h
ce4100.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 334	2019-06-05 17:37:06 +02:00
common.c	treewide: Add SPDX license identifier for missed files	2019-05-21 10:50:45 +02:00
direct.c
early.c
fixup.c	PCI: Add AMD RS690 quirk to enable 64-bit DMA	2021-06-30 08:47:49 -04:00
i386.c	x86/PCI: Replace spin_is_locked() with lockdep	2018-11-08 21:53:35 -08:00
init.c
intel_mid_pci.c	x86/PCI: Fix intel_mid_pci.c build error when ACPI is not enabled	2020-11-01 12:01:02 +01:00
irq.c	x86/PCI: Fix PCI IRQ routing table memory leak	2019-04-17 15:27:03 -05:00
legacy.c	treewide: Add SPDX license identifier for missed files	2019-05-21 10:50:45 +02:00
Makefile
mmconfig-shared.c	x86/pci: Pass lockdep condition to pcm_mmcfg_list iterator	2019-08-13 14:29:22 -07:00
mmconfig_32.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 387	2019-06-05 17:37:11 +02:00
mmconfig_64.c
numachip.c
olpc.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152	2019-05-30 11:26:32 -07:00
pcbios.c
sta2x11-fixup.c	dma-mapping: fix filename references	2019-09-03 08:36:30 +02:00
xen.c	x86/pci/xen: Disable PCI/MSI[-X] masking for XEN_HVM guests	2022-06-06 08:33:48 +02:00