Commit-ID: 2a85386a73fa57b114ba66421b57d3850dbcef9f
Gitweb: http://git.kernel.org/tip/2a85386a73fa57b114ba66421b57d3850dbcef9f
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Wed, 13 Sep 2017 23:29:46 +0200
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Mon, 25 Sep 2017 20:52:00 +0200
x86/apic/msi: Force reactivation of interrupts at startup time
MSI(X) interrupts need a valid vector configuration early at allocation
time, i.e. before the PCI core enables MSI(X).
With managed interrupts and the new global reservation scheme, the early
configuration will not assign a real device vector, but a special shutdown
vector. When the irq is started up, then the interrupt must be
reconfigured. Tell the MSI irqdomain core about it.
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Tested-by: Juergen Gross <jgross@xxxxxxxx>
Tested-by: Yu Chen <yu.c.chen@xxxxxxxxx>
Acked-by: Juergen Gross <jgross@xxxxxxxx>
Cc: Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Marc Zyngier <marc.zyngier@xxxxxxx>
Cc: Alok Kataria <akataria@xxxxxxxxxx>
Cc: Joerg Roedel <joro@xxxxxxxxxx>
Cc: "Rafael J. Wysocki" <rjw@xxxxxxxxxxxxx>
Cc: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Christoph Hellwig <hch@xxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Cc: Rui Zhang <rui.zhang@xxxxxxxxx>
Cc: "K. Y. Srinivasan" <kys@xxxxxxxxxxxxx>
Cc: Arjan van de Ven <arjan@xxxxxxxxxxxxxxx>
Cc: Dan Williams <dan.j.williams@xxxxxxxxx>
Cc: Len Brown <lenb@xxxxxxxxxx>
Link: https://lkml.kernel.org/r/20170913213155.774066582@xxxxxxxxxxxxx
---
arch/x86/kernel/apic/msi.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c
index 9b18be7..5b6dd1a 100644
--- a/arch/x86/kernel/apic/msi.c
+++ b/arch/x86/kernel/apic/msi.c
@@ -129,7 +129,7 @@ static struct msi_domain_ops pci_msi_domain_ops = {
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_MUST_REACTIVATE,
.ops = &pci_msi_domain_ops,
.chip = &pci_msi_controller,
.handler = handle_edge_irq,
@@ -167,7 +167,8 @@ static struct irq_chip pci_msi_ir_controller = {
static struct msi_domain_info pci_msi_ir_domain_info = {
.flags = MSI_FLAG_USE_DEF_DOM_OPS | MSI_FLAG_USE_DEF_CHIP_OPS |
- MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX,
+ MSI_FLAG_MULTI_PCI_MSI | MSI_FLAG_PCI_MSIX |
+ MSI_FLAG_MUST_REACTIVATE,
.ops = &pci_msi_domain_ops,
.chip = &pci_msi_ir_controller,
.handler = handle_edge_irq,
--
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