The following commit has been merged into the x86/irq branch of tip: Commit-ID: 7fec07fd217800c5174f51d8869518807e9aa144 Gitweb: https://git.kernel.org/tip/7fec07fd217800c5174f51d8869518807e9aa144 Author: Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx> AuthorDate: Tue, 23 Apr 2024 10:41:06 -07:00 Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx> CommitterDate: Tue, 30 Apr 2024 00:54:42 +02:00 x86/irq: Add a Kconfig option for posted MSI This option will be used to support delivering MSIs as posted interrupts. Interrupt remapping is required. Signed-off-by: Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx> Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20240423174114.526704-5-jacob.jun.pan@xxxxxxxxxxxxxxx --- arch/x86/Kconfig | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 4474bf3..fed22fc 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -464,6 +464,17 @@ config X86_X2APIC If you don't know what to do here, say N. +config X86_POSTED_MSI + bool "Enable MSI and MSI-x delivery by posted interrupts" + depends on X86_64 && IRQ_REMAP + help + This enables MSIs that are under interrupt remapping to be delivered as + posted interrupts to the host kernel. Interrupt throughput can + potentially be improved by coalescing CPU notifications during high + frequency bursts. + + If you don't know what to do here, say N. + config X86_MPPARSE bool "Enable MPS table" if ACPI default y
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