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| author |   Thomas Gleixner <tglx@linutronix.de> | 2022-11-25 00:26:28 +0100 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2022-12-05 22:22:34 +0100 |
| commit | e23d4192bf9b612bce5b24f22719fd3cc6edaa69 (patch) | |
| tree | a6e24e09672b93f1784bd889ec677ccb8878424e /include/linux/msi.h | |
| parent | x86/apic/msi: Enable MSI_FLAG_PCI_MSIX_ALLOC_DYN (diff) | |
| download | wireguard-linux-e23d4192bf9b612bce5b24f22719fd3cc6edaa69.tar.xz wireguard-linux-e23d4192bf9b612bce5b24f22719fd3cc6edaa69.zip | |
genirq/msi: Provide constants for PCI/IMS support
Provide the necessary constants for PCI/IMS support:
- A new bus token for MSI irqdomain identification
- A MSI feature flag for the MSI irqdomains to signal support
- A secondary domain id
The latter expands the device internal domain pointer storage array from 1
to 2 entries. That extra pointer is mostly unused today, but the
alternative solutions would not be free either and would introduce more
complexity all over the place. Trade the 8bytes for simplicity.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221124232326.846169830@linutronix.de
Diffstat (limited to 'include/linux/msi.h')
| -rw-r--r-- | include/linux/msi.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/msi.h b/include/linux/msi.h index 3cb15866ffbf..a112b913fff9 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -559,6 +559,8 @@ enum { MSI_FLAG_MSIX_CONTIGUOUS = (1 << 19), /* PCI/MSI-X vectors can be dynamically allocated/freed post MSI-X enable */ MSI_FLAG_PCI_MSIX_ALLOC_DYN = (1 << 20), + /* Support for PCI/IMS */ + MSI_FLAG_PCI_IMS = (1 << 21), }; /** |