diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2020-08-26 13:16:51 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-09-16 16:52:36 +0200 |
| commit | c6c9e2838c5f0b94773511586123bcb125757f2a (patch) | |
| tree | a343db30354fc6a9b4919b3c0cf90bb3ed629c4d | |
| parent | 6b15ffa07dc325f4e4dd98c877bfa970202c378b (diff) | |
| download | linux-rt-c6c9e2838c5f0b94773511586123bcb125757f2a.tar.gz | |
irqdomain/msi: Provide DOMAIN_BUS_VMD_MSI
PCI devices behind a VMD bus are not subject to interrupt remapping, but
the irq domain for VMD MSI cannot be distinguished from a regular PCI/MSI
irq domain.
Add a new domain bus token and allow it in the bus token check in
msi_check_reservation_mode() to keep the functionality the same once VMD
uses this token.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Marc Zyngier <maz@kernel.org>
Acked-by: Jon Derrick <jonathan.derrick@intel.com>
Link: https://lore.kernel.org/r/20200826112332.954409970@linutronix.de
| -rw-r--r-- | include/linux/irqdomain.h | 1 | ||||
| -rw-r--r-- | kernel/irq/msi.c | 7 |
2 files changed, 7 insertions, 1 deletions
diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h index b37350c4fe37..44445d9de881 100644 --- a/include/linux/irqdomain.h +++ b/include/linux/irqdomain.h @@ -84,6 +84,7 @@ enum irq_domain_bus_token { DOMAIN_BUS_FSL_MC_MSI, DOMAIN_BUS_TI_SCI_INTA_MSI, DOMAIN_BUS_WAKEUP, + DOMAIN_BUS_VMD_MSI, }; /** diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c index 640668e3f870..616b9583cfbb 100644 --- a/kernel/irq/msi.c +++ b/kernel/irq/msi.c @@ -364,8 +364,13 @@ static bool msi_check_reservation_mode(struct irq_domain *domain, { struct msi_desc *desc; - if (domain->bus_token != DOMAIN_BUS_PCI_MSI) + switch(domain->bus_token) { + case DOMAIN_BUS_PCI_MSI: + case DOMAIN_BUS_VMD_MSI: + break; + default: return false; + } if (!(info->flags & MSI_FLAG_MUST_REACTIVATE)) return false; |