[patch 01/20] genirq/msi: Move IRQ_DOMAIN_MSI_NOMASK_QUIRK to MSI flags

Thomas Gleixner
2022-11-11T14:00:44Z

It's truly a MSI only flag and for the upcoming per device MSI domains this
must be in the MSI flags so it can be set during domain setup without
exposing this quirk outside of x86.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
---
arch/x86/kernel/apic/msi.c | 5 ++---
include/linux/irqdomain.h | 9 +--------
include/linux/msi.h | 6 ++++++
kernel/irq/msi.c | 2 +-
4 files changed, 10 insertions(+), 12 deletions(-)

--- a/arch/x86/kernel/apic/msi.c
+++ b/arch/x86/kernel/apic/msi.c
@@ -176,7 +176,8 @@ static struct msi_domain_ops pci_msi_dom

static struct msi_domain_info pci_msi_domain_info = {
.flags = MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
- MSI_FLAG_PCI_MSIX,
+ MSI_FLAG_PCI_MSIX | MSI_FLAG_NOMASK_QUIRK,
+
.ops = &pci_msi_domain_ops,
.chip = &pci_msi_controller,
.handler = handle_edge_irq,
@@ -200,8 +201,6 @@ struct irq_domain * __init native_create
if (!d) {
irq_domain_free_fwnode(fn);
pr_warn("Failed to initialize PCI-MSI irqdomain.\n");
- } else {
- d->flags |= IRQ_DOMAIN_MSI_NOMASK_QUIRK;
}
return d;
}
--- a/include/linux/irqdomain.h
+++ b/include/linux/irqdomain.h
@@ -186,15 +186,8 @@ enum {
/* Irq domain implements MSI remapping */
IRQ_DOMAIN_FLAG_MSI_REMAP = (1 << 5),

- /*
- * Quirk to handle MSI implementations which do not provide
- * masking. Currently known to affect x86, but partially
- * handled in core code.
- */
- IRQ_DOMAIN_MSI_NOMASK_QUIRK = (1 << 6),
-
/* Irq domain doesn't translate anything */
- IRQ_DOMAIN_FLAG_NO_MAP = (1 << 7),
+ IRQ_DOMAIN_FLAG_NO_MAP = (1 << 6),

/*
* Flags starting from IRQ_DOMAIN_FLAG_NONCORE are reserved
--- a/include/linux/msi.h
+++ b/include/linux/msi.h
@@ -395,6 +395,12 @@ enum {
MSI_FLAG_ALLOC_SIMPLE_MSI_DESCS = (1 << 9),
/* Free MSI descriptors */
MSI_FLAG_FREE_MSI_DESCS = (1 << 10),
+ /*
+ * Quirk to handle MSI implementations which do not provide
+ * masking. Currently known to affect x86, but has to be partially
+ * handled in the core MSI code.
+ */
+ MSI_FLAG_NOMASK_QUIRK = (1 << 11),
};

int msi_domain_set_affinity(struct irq_data *data, const struct cpumask *mask,
--- a/kernel/irq/msi.c
+++ b/kernel/irq/msi.c
@@ -875,7 +875,7 @@ static int __msi_domain_alloc_irqs(struc
* MSI affinity setting requires a special quirk (X86) when
* reservation mode is active.
*/
- if (domain->flags & IRQ_DOMAIN_MSI_NOMASK_QUIRK)
+ if (info->flags & MSI_FLAG_NOMASK_QUIRK)
vflags |= VIRQ_NOMASK_QUIRK;
}