From: Jacob Pan <jacob.jun.pan@linux.intel.com>
To: LKML <linux-kernel@vger.kernel.org>, X86 Kernel <x86@kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
iommu@lists.linux.dev, Thomas Gleixner <tglx@linutronix.de>,
"Lu Baolu" <baolu.lu@linux.intel.com>,
kvm@vger.kernel.org, Dave Hansen <dave.hansen@intel.com>,
Joerg Roedel <joro@8bytes.org>, "H. Peter Anvin" <hpa@zytor.com>,
"Borislav Petkov" <bp@alien8.de>,
"Ingo Molnar" <mingo@redhat.com>
Cc: Paul Luse <paul.e.luse@intel.com>,
Dan Williams <dan.j.williams@intel.com>,
Jens Axboe <axboe@kernel.dk>, Raj Ashok <ashok.raj@intel.com>,
"Tian, Kevin" <kevin.tian@intel.com>,
maz@kernel.org, seanjc@google.com,
"Robin Murphy" <robin.murphy@arm.com>,
Jacob Pan <jacob.jun.pan@linux.intel.com>
Subject: [PATCH 04/15] x86/irq: Add a Kconfig option for posted MSI
Date: Fri, 26 Jan 2024 15:42:26 -0800 [thread overview]
Message-ID: <20240126234237.547278-5-jacob.jun.pan@linux.intel.com> (raw)
In-Reply-To: <20240126234237.547278-1-jacob.jun.pan@linux.intel.com>
This option will be used to support delivering MSIs as posted
interrupts. Interrupt remapping is required.
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
---
arch/x86/Kconfig | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 5edec175b9bf..79f04ee2b91c 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -463,6 +463,17 @@ 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_X2APIC && 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
--
2.25.1
next prev parent reply other threads:[~2024-01-26 23:37 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-01-26 23:42 [PATCH 00/15] Coalesced Interrupt Delivery with " Jacob Pan
2024-01-26 23:42 ` [PATCH 01/15] x86/irq: Move posted interrupt descriptor out of vmx code Jacob Pan
2024-01-26 23:42 ` [PATCH 02/15] x86/irq: Unionize PID.PIR for 64bit access w/o casting Jacob Pan
2024-01-26 23:42 ` [PATCH 03/15] x86/irq: Use bitfields exclusively in posted interrupt descriptor Jacob Pan
2024-01-31 1:48 ` Sean Christopherson
2024-02-06 0:40 ` Jacob Pan
2024-01-26 23:42 ` Jacob Pan [this message]
2024-04-05 2:28 ` [PATCH 04/15] x86/irq: Add a Kconfig option for posted MSI Robert Hoo
2024-04-05 15:54 ` Jacob Pan
2024-01-26 23:42 ` [PATCH 05/15] x86/irq: Reserve a per CPU IDT vector for posted MSIs Jacob Pan
2024-04-04 13:38 ` Robert Hoo
2024-04-04 17:17 ` Jacob Pan
2024-01-26 23:42 ` [PATCH 06/15] x86/irq: Set up per host CPU posted interrupt descriptors Jacob Pan
2024-02-13 19:44 ` Jacob Pan
2024-01-26 23:42 ` [PATCH 07/15] x86/irq: Add accessors for " Jacob Pan
2024-01-26 23:42 ` [PATCH 08/15] x86/irq: Factor out calling ISR from common_interrupt Jacob Pan
2024-01-26 23:42 ` [PATCH 09/15] x86/irq: Install posted MSI notification handler Jacob Pan
2024-03-29 7:32 ` Zeng Guang
2024-04-03 2:43 ` Jacob Pan
2024-01-26 23:42 ` [PATCH 10/15] x86/irq: Factor out common code for checking pending interrupts Jacob Pan
2024-01-26 23:42 ` [PATCH 11/15] x86/irq: Extend checks for pending vectors to posted interrupts Jacob Pan
2024-01-26 23:42 ` [PATCH 12/15] iommu/vt-d: Make posted MSI an opt-in cmdline option Jacob Pan
2024-01-26 23:42 ` [PATCH 13/15] iommu/vt-d: Add an irq_chip for posted MSIs Jacob Pan
2024-01-26 23:42 ` [PATCH 14/15] iommu/vt-d: Add a helper to retrieve PID address Jacob Pan
2024-01-26 23:42 ` [PATCH 15/15] iommu/vt-d: Enable posted mode for device MSIs Jacob Pan
2024-02-08 15:34 ` [PATCH 00/15] Coalesced Interrupt Delivery with posted MSI Jens Axboe
2024-02-09 17:43 ` Jacob Pan
2024-02-09 20:31 ` Jens Axboe
2024-02-12 18:27 ` Jacob Pan
2024-02-12 18:36 ` Jens Axboe
2024-02-12 20:13 ` Jacob Pan
2024-02-13 1:10 ` Jacob Pan
2024-04-04 13:45 ` Robert Hoo
2024-04-04 17:37 ` Jacob Pan
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