genirq/msi: Rename IRQ_DOMAIN_MSI_REMAP to IRQ_DOMAIN_ISOLATED_MSI

What x86 calls "interrupt remapping" is one way to achieve isolated MSI,
make it clear this is talking about isolated MSI, no matter how it is
achieved. This matches the new driver facing API name of
msi_device_has_isolated_msi()

No functional change.

Link: https://lore.kernel.org/r/6-v3-3313bb5dd3a3+10f11-secure_msi_jgg@nvidia.com
Tested-by: Matthew Rosato <mjrosato@linux.ibm.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>

diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c
index 973ede0..b4069f8 100644 (file)
--- a/drivers/irqchip/irq-gic-v3-its.c
+++ b/drivers/irqchip/irq-gic-v3-its.c
@@ -4692,7 +4692,7 @@ static bool __maybe_unused its_enable_quirk_socionext_synquacer(void *data)
                }
 
                /* the pre-ITS breaks isolation, so disable MSI remapping */
-               its->msi_domain_flags &= ~IRQ_DOMAIN_FLAG_MSI_REMAP;
+               its->msi_domain_flags &= ~IRQ_DOMAIN_FLAG_ISOLATED_MSI;
                return true;
        }
        return false;
@@ -5074,7 +5074,7 @@ static int __init its_probe_one(struct resource *res,
        its->cmd_write = its->cmd_base;
        its->fwnode_handle = handle;
        its->get_msi_base = its_irq_get_msi_base;
-       its->msi_domain_flags = IRQ_DOMAIN_FLAG_MSI_REMAP;
+       its->msi_domain_flags = IRQ_DOMAIN_FLAG_ISOLATED_MSI;
 
        its_enable_quirks(its);
 

diff --git a/include/linux/irqdomain.h b/include/linux/irqdomain.h
index b04ce03..0a3e974 100644 (file)
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -192,8 +192,10 @@ enum {
        /* Irq domain implements MSIs */
        IRQ_DOMAIN_FLAG_MSI             = (1 << 4),
 
-       /* Irq domain implements MSI remapping */
-       IRQ_DOMAIN_FLAG_MSI_REMAP       = (1 << 5),
+       /*
+        * Irq domain implements isolated MSI, see msi_device_has_isolated_msi()
+        */
+       IRQ_DOMAIN_FLAG_ISOLATED_MSI    = (1 << 5),
 
        /* Irq domain doesn't translate anything */
        IRQ_DOMAIN_FLAG_NO_MAP          = (1 << 6),

diff --git a/kernel/irq/msi.c b/kernel/irq/msi.c
index dfb5d40..ac5e224 100644 (file)
--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -1645,7 +1645,7 @@ bool msi_device_has_isolated_msi(struct device *dev)
        struct irq_domain *domain = dev_get_msi_domain(dev);
 
        for (; domain; domain = domain->parent)
-               if (domain->flags & IRQ_DOMAIN_FLAG_MSI_REMAP)
+               if (domain->flags & IRQ_DOMAIN_FLAG_ISOLATED_MSI)
                        return true;
        return false;
 }