diff options
| 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 | |
| parent | 486254ad967dbef37fd797dd296fe69b465aa0f9 (diff) | |
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
| -rw-r--r-- | include/linux/irqdomain_defs.h | 1 | ||||
| -rw-r--r-- | include/linux/msi.h | 2 | ||||
| -rw-r--r-- | include/linux/msi_api.h | 1 |
3 files changed, 4 insertions, 0 deletions
diff --git a/include/linux/irqdomain_defs.h b/include/linux/irqdomain_defs.h index 0b2d8a83e0d8..c29921fd8cd1 100644 --- a/include/linux/irqdomain_defs.h +++ b/include/linux/irqdomain_defs.h @@ -25,6 +25,7 @@ enum irq_domain_bus_token { DOMAIN_BUS_PCI_DEVICE_MSIX, DOMAIN_BUS_DMAR, DOMAIN_BUS_AMDVI, + DOMAIN_BUS_PCI_DEVICE_IMS, }; #endif /* _LINUX_IRQDOMAIN_DEFS_H */ 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), }; /** diff --git a/include/linux/msi_api.h b/include/linux/msi_api.h index 5ae72d1912c4..391087ad99b1 100644 --- a/include/linux/msi_api.h +++ b/include/linux/msi_api.h @@ -15,6 +15,7 @@ struct device; */ enum msi_domain_ids { MSI_DEFAULT_DOMAIN, + MSI_SECONDARY_DOMAIN, MSI_MAX_DEVICE_IRQDOMAINS, }; |