linux-kernel - [PATCH v4 15/21] x86/xen: Drop xen_irq

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Message-ID: <20251127070844.21919-16-jgross@suse.com>
Date: Thu, 27 Nov 2025 08:08:38 +0100
From: Juergen Gross <jgross@...e.com>
To: linux-kernel@...r.kernel.org,
	x86@...nel.org
Cc: Juergen Gross <jgross@...e.com>,
	Boris Ostrovsky <boris.ostrovsky@...cle.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	Borislav Petkov <bp@...en8.de>,
	Dave Hansen <dave.hansen@...ux.intel.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Josh Poimboeuf <jpoimboe@...nel.org>,
	Peter Zijlstra <peterz@...radead.org>,
	xen-devel@...ts.xenproject.org
Subject: [PATCH v4 15/21] x86/xen: Drop xen_irq_ops

Instead of having a pre-filled array xen_irq_ops for Xen PV paravirt
functions, drop the array and assign each element individually.

This is in preparation of reducing the paravirt include hell by
splitting paravirt.h into multiple more fine grained header files,
which will in turn require to split up the pv_ops vector as well.
Dropping the pre-filled array makes life easier for objtool to
detect missing initializers in multiple pv_ops_ arrays.

Signed-off-by: Juergen Gross <jgross@...e.com>
---
V2:
- new patch
---
 arch/x86/xen/irq.c    | 20 +++++++-------------
 tools/objtool/check.c |  1 -
 2 files changed, 7 insertions(+), 14 deletions(-)

diff --git a/arch/x86/xen/irq.c b/arch/x86/xen/irq.c
index 39982f955cfe..d8678c3d3971 100644
--- a/arch/x86/xen/irq.c
+++ b/arch/x86/xen/irq.c
@@ -40,20 +40,14 @@ static void xen_halt(void)
 		xen_safe_halt();
 }
 
-static const typeof(pv_ops) xen_irq_ops __initconst = {
-	.irq = {
-		/* Initial interrupt flag handling only called while interrupts off. */
-		.save_fl = __PV_IS_CALLEE_SAVE(paravirt_ret0),
-		.irq_disable = __PV_IS_CALLEE_SAVE(paravirt_nop),
-		.irq_enable = __PV_IS_CALLEE_SAVE(BUG_func),
-
-		.safe_halt = xen_safe_halt,
-		.halt = xen_halt,
-	},
-};
-
 void __init xen_init_irq_ops(void)
 {
-	pv_ops.irq = xen_irq_ops.irq;
+	/* Initial interrupt flag handling only called while interrupts off. */
+	pv_ops.irq.save_fl = __PV_IS_CALLEE_SAVE(paravirt_ret0);
+	pv_ops.irq.irq_disable = __PV_IS_CALLEE_SAVE(paravirt_nop);
+	pv_ops.irq.irq_enable = __PV_IS_CALLEE_SAVE(BUG_func);
+	pv_ops.irq.safe_halt = xen_safe_halt;
+	pv_ops.irq.halt = xen_halt;
+
 	x86_init.irqs.intr_init = xen_init_IRQ;
 }
diff --git a/tools/objtool/check.c b/tools/objtool/check.c
index 9004fbc06769..3fd551c080ee 100644
--- a/tools/objtool/check.c
+++ b/tools/objtool/check.c
@@ -594,7 +594,6 @@ static int init_pv_ops(struct objtool_file *file)
 	static const char *pv_ops_tables[] = {
 		"pv_ops",
 		"xen_cpu_ops",
-		"xen_irq_ops",
 		"xen_mmu_ops",
 		NULL,
 	};
-- 
2.51.0