Revert "x86/apic/msi: Enable PCI/IMS"

This reverts commit 6e24c887732901140f4e82ba2315c2e15f06f1d6.

IMS (Interrupt Message Store) support appeared in v6.2, but there are no
users yet.

Remove it for now.  We can add it back when a user comes along.

Link: https://lore.kernel.org/r/20240410221307.2162676-7-helgaas@kernel.org
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>

diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c
index d9651f15ae4f70f786914fed87e06107ff34edb2..340769242deaec10d03c462aa95f995ea4bafa23 100644 (file)
--- a/arch/x86/kernel/apic/msi.c
+++ b/arch/x86/kernel/apic/msi.c
@@ -184,7 +184,6 @@ static int x86_msi_prepare(struct irq_domain *domain, struct device *dev,
                alloc->type = X86_IRQ_ALLOC_TYPE_PCI_MSI;
                return 0;
        case DOMAIN_BUS_PCI_DEVICE_MSIX:
-       case DOMAIN_BUS_PCI_DEVICE_IMS:
                alloc->type = X86_IRQ_ALLOC_TYPE_PCI_MSIX;
                return 0;
        default:
@@ -229,10 +228,6 @@ static bool x86_init_dev_msi_info(struct device *dev, struct irq_domain *domain,
        case DOMAIN_BUS_PCI_DEVICE_MSI:
        case DOMAIN_BUS_PCI_DEVICE_MSIX:
                break;
-       case DOMAIN_BUS_PCI_DEVICE_IMS:
-               if (!(pops->supported_flags & MSI_FLAG_PCI_IMS))
-                       return false;
-               break;
        default:
                WARN_ON_ONCE(1);
                return false;