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Date: Fri, 11 Nov 2022 14:58:59 +0100 (CET) From: Thomas Gleixner <tglx@...utronix.de> To: LKML <linux-kernel@...r.kernel.org> Cc: x86@...nel.org, Joerg Roedel <joro@...tes.org>, Will Deacon <will@...nel.org>, linux-pci@...r.kernel.org, Bjorn Helgaas <bhelgaas@...gle.com>, Lorenzo Pieralisi <lorenzo.pieralisi@....com>, Marc Zyngier <maz@...nel.org>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>, Jason Gunthorpe <jgg@...lanox.com>, Dave Jiang <dave.jiang@...el.com>, Alex Williamson <alex.williamson@...hat.com>, Kevin Tian <kevin.tian@...el.com>, Dan Williams <dan.j.williams@...el.com>, Logan Gunthorpe <logang@...tatee.com>, Ashok Raj <ashok.raj@...el.com>, Jon Mason <jdmason@...zu.us>, Allen Hubbe <allenbh@...il.com>, "Ahmed S. Darwish" <darwi@...utronix.de>, Reinette Chatre <reinette.chatre@...el.com> Subject: [patch 30/33] x86/apic/msi: Enable PCI/IMS Enable IMS in the domain init and allocation mapping code, but do not enable it on the vector domain as discussed in various threads on LKML. The interrupt remap domains can expand this setting like they do with PCI multi MSI. Signed-off-by: Thomas Gleixner <tglx@...utronix.de> --- arch/x86/kernel/apic/msi.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/arch/x86/kernel/apic/msi.c +++ b/arch/x86/kernel/apic/msi.c @@ -184,6 +184,7 @@ static int x86_msi_prepare(struct irq_do 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: @@ -230,6 +231,10 @@ static bool x86_init_dev_msi_info(struct 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;
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