diff options
| author | Jason Gunthorpe <jgg@nvidia.com> | 2022-11-28 20:31:57 -0400 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@nvidia.com> | 2023-01-11 16:27:23 -0400 |
| commit | bf210f793937a634bae6eda6a6d699c00b2b53d9 (patch) | |
| tree | 2f59938255601c234e229639f321d8b5f572ad5d /include/linux | |
| parent | f188bdb5f1df5b35374482ea0568de85f1f468ea (diff) | |
irq/s390: Add arch_is_isolated_msi() for s390
s390 doesn't use irq_domains, so it has no place to set
IRQ_DOMAIN_FLAG_ISOLATED_MSI. Instead of continuing to abuse the iommu
subsystem to convey this information add a simple define which s390 can
make statically true. The define will cause msi_device_has_isolated() to
return true.
Remove IOMMU_CAP_INTR_REMAP from the s390 iommu driver.
Link: https://lore.kernel.org/r/8-v3-3313bb5dd3a3+10f11-secure_msi_jgg@nvidia.com
Reviewed-by: Matthew Rosato <mjrosato@linux.ibm.com>
Tested-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/msi.h | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/include/linux/msi.h b/include/linux/msi.h index e8a3f3a8a7f4..13c9b74a4575 100644 --- a/include/linux/msi.h +++ b/include/linux/msi.h @@ -48,6 +48,10 @@ typedef struct arch_msi_msg_data { } __attribute__ ((packed)) arch_msi_msg_data_t; #endif +#ifndef arch_is_isolated_msi +#define arch_is_isolated_msi() false +#endif + /** * msi_msg - Representation of a MSI message * @address_lo: Low 32 bits of msi message address @@ -657,10 +661,10 @@ static inline bool msi_device_has_isolated_msi(struct device *dev) /* * Arguably if the platform does not enable MSI support then it has * "isolated MSI", as an interrupt controller that cannot receive MSIs - * is inherently isolated by our definition. As nobody seems to needs - * this be conservative and return false anyhow. + * is inherently isolated by our definition. The default definition for + * arch_is_isolated_msi() is conservative and returns false anyhow. */ - return false; + return arch_is_isolated_msi(); } #endif /* CONFIG_GENERIC_MSI_IRQ */ |