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>,
jim.harris@samsung.com, a.manzanares@samsung.com,
"Bjorn Helgaas" <helgaas@kernel.org>,
guang.zeng@intel.com, robert.hoo.linux@gmail.com,
oliver.sang@intel.com, acme@kernel.org,
Jacob Pan <jacob.jun.pan@linux.intel.com>
Subject: [PATCH v3 07/12] x86/irq: Factor out calling ISR from common_interrupt
Date: Tue, 23 Apr 2024 10:41:09 -0700 [thread overview]
Message-ID: <20240423174114.526704-8-jacob.jun.pan@linux.intel.com> (raw)
In-Reply-To: <20240423174114.526704-1-jacob.jun.pan@linux.intel.com>
Prepare for calling external IRQ handlers directly from the posted MSI
demultiplexing loop. Extract the common code with common interrupt to
avoid code duplication.
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
---
arch/x86/kernel/irq.c | 23 ++++++++++++++---------
1 file changed, 14 insertions(+), 9 deletions(-)
diff --git a/arch/x86/kernel/irq.c b/arch/x86/kernel/irq.c
index dbb3a19b3004..d652b0481899 100644
--- a/arch/x86/kernel/irq.c
+++ b/arch/x86/kernel/irq.c
@@ -242,18 +242,10 @@ static __always_inline void handle_irq(struct irq_desc *desc,
__handle_irq(desc, regs);
}
-/*
- * common_interrupt() handles all normal device IRQ's (the special SMP
- * cross-CPU interrupts have their own entry points).
- */
-DEFINE_IDTENTRY_IRQ(common_interrupt)
+static __always_inline void call_irq_handler(int vector, struct pt_regs *regs)
{
- struct pt_regs *old_regs = set_irq_regs(regs);
struct irq_desc *desc;
- /* entry code tells RCU that we're not quiescent. Check it. */
- RCU_LOCKDEP_WARN(!rcu_is_watching(), "IRQ failed to wake up RCU");
-
desc = __this_cpu_read(vector_irq[vector]);
if (likely(!IS_ERR_OR_NULL(desc))) {
handle_irq(desc, regs);
@@ -268,7 +260,20 @@ DEFINE_IDTENTRY_IRQ(common_interrupt)
__this_cpu_write(vector_irq[vector], VECTOR_UNUSED);
}
}
+}
+
+/*
+ * common_interrupt() handles all normal device IRQ's (the special SMP
+ * cross-CPU interrupts have their own entry points).
+ */
+DEFINE_IDTENTRY_IRQ(common_interrupt)
+{
+ struct pt_regs *old_regs = set_irq_regs(regs);
+
+ /* entry code tells RCU that we're not quiescent. Check it. */
+ RCU_LOCKDEP_WARN(!rcu_is_watching(), "IRQ failed to wake up RCU");
+ call_irq_handler(vector, regs);
set_irq_regs(old_regs);
}
--
2.25.1
next prev parent reply other threads:[~2024-04-23 17:36 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-04-23 17:41 [PATCH v3 00/12] Coalesced Interrupt Delivery with posted MSI Jacob Pan
2024-04-23 17:41 ` [PATCH v3 01/12] KVM: VMX: Move posted interrupt descriptor out of vmx code Jacob Pan
2024-04-23 17:41 ` [PATCH v3 02/12] x86/irq: Unionize PID.PIR for 64bit access w/o casting Jacob Pan
2024-04-23 17:41 ` [PATCH v3 03/12] x86/irq: Remove bitfields in posted interrupt descriptor Jacob Pan
2024-05-01 7:29 ` Oliver Sang
2024-04-23 17:41 ` [PATCH v3 04/12] x86/irq: Add a Kconfig option for posted MSI Jacob Pan
2024-04-23 17:41 ` [PATCH v3 05/12] x86/irq: Reserve a per CPU IDT vector for posted MSIs Jacob Pan
2024-04-23 17:41 ` [PATCH v3 06/12] x86/irq: Set up per host CPU posted interrupt descriptors Jacob Pan
2024-04-23 17:41 ` Jacob Pan [this message]
2024-04-23 17:41 ` [PATCH v3 08/12] x86/irq: Install posted MSI notification handler Jacob Pan
2024-04-23 17:41 ` [PATCH v3 09/12] x86/irq: Factor out common code for checking pending interrupts Jacob Pan
2024-04-23 17:41 ` [PATCH v3 10/12] x86/irq: Extend checks for pending vectors to posted interrupts Jacob Pan
2024-04-23 17:41 ` [PATCH v3 11/12] iommu/vt-d: Make posted MSI an opt-in cmdline option Jacob Pan
2024-04-23 17:41 ` [PATCH v3 12/12] iommu/vt-d: Enable posted mode for device MSIs Jacob Pan
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