linux

Jonathan Currier 35ba7b2d4d PCI/MSI: Add an option to write MSIX ENTRY_DATA before any reads [ Upstream commit `cf761e3dac` ] Commit `7d5ec3d361` ("PCI/MSI: Mask all unused MSI-X entries") introduced a readl() from ENTRY_VECTOR_CTRL before the writel() to ENTRY_DATA. This is correct, however some hardware, like the Sun Neptune chips, the NIU module, will cause an error and/or fatal trap if any MSIX table entry is read before the corresponding ENTRY_DATA field is written to. Add an optional early writel() in msix_prepare_msi_desc(). Fixes: `7d5ec3d361` ("PCI/MSI: Mask all unused MSI-X entries") Signed-off-by: Jonathan Currier <dullfire@yahoo.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/all/20241117234843.19236-2-dullfire@yahoo.com Signed-off-by: Sasha Levin <sashal@kernel.org>		History 2025-05-02 07:58:56 +02:00
..
api.c	Merge branch 'pci/ims-removal'	2024-05-16 18:14:14 -05:00
irqdomain.c	PCI/MSI: Handle lack of irqdomain gracefully	2025-01-02 10:34:22 +01:00
legacy.c	PCI/MSI: Prevent UAF in error path	2022-01-21 02:14:46 +01:00
Makefile	PCI/MSI: Move pci_disable_msi() to api.c	2022-11-17 15:15:20 +01:00
msi.c	PCI/MSI: Add an option to write MSIX ENTRY_DATA before any reads	2025-05-02 07:58:56 +02:00
msi.h	PCI/MSI: Split MSI-X descriptor setup	2022-12-05 22:22:34 +01:00
pcidev_msi.c	PCI/MSI: Split out CONFIG_PCI_MSI independent part	2021-12-09 11:52:22 +01:00