linux-kernel - [PATCH v0 01/15] iommu/hyperv: rename hyperv-iommu.c to hyperv-irq.c

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Message-ID: <20260120064230.3602565-2-mrathor@linux.microsoft.com>
Date: Mon, 19 Jan 2026 22:42:16 -0800
From: Mukesh R <mrathor@...ux.microsoft.com>
To: linux-kernel@...r.kernel.org,
	linux-hyperv@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	iommu@...ts.linux.dev,
	linux-pci@...r.kernel.org,
	linux-arch@...r.kernel.org
Cc: kys@...rosoft.com,
	haiyangz@...rosoft.com,
	wei.liu@...nel.org,
	decui@...rosoft.com,
	longli@...rosoft.com,
	catalin.marinas@....com,
	will@...nel.org,
	tglx@...utronix.de,
	mingo@...hat.com,
	bp@...en8.de,
	dave.hansen@...ux.intel.com,
	hpa@...or.com,
	joro@...tes.org,
	lpieralisi@...nel.org,
	kwilczynski@...nel.org,
	mani@...nel.org,
	robh@...nel.org,
	bhelgaas@...gle.com,
	arnd@...db.de,
	nunodasneves@...ux.microsoft.com,
	mhklinux@...look.com,
	romank@...ux.microsoft.com
Subject: [PATCH v0 01/15] iommu/hyperv: rename hyperv-iommu.c to hyperv-irq.c

From: Mukesh Rathor <mrathor@...ux.microsoft.com>

This file actually implements irq remapping, so rename to more appropriate
hyperv-irq.c. A new file named hyperv-iommu.c will be introduced later.
Also, move CONFIG_IRQ_REMAP out of the file and add to Makefile.

Signed-off-by: Mukesh Rathor <mrathor@...ux.microsoft.com>
---
 MAINTAINERS                                    | 2 +-
 drivers/iommu/Kconfig                          | 1 +
 drivers/iommu/Makefile                         | 2 +-
 drivers/iommu/{hyperv-iommu.c => hyperv-irq.c} | 4 ----
 4 files changed, 3 insertions(+), 6 deletions(-)
 rename drivers/iommu/{hyperv-iommu.c => hyperv-irq.c} (99%)

diff --git a/MAINTAINERS b/MAINTAINERS
index 5b11839cba9d..381a0e086382 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -11741,7 +11741,7 @@ F:	drivers/hid/hid-hyperv.c
 F:	drivers/hv/
 F:	drivers/infiniband/hw/mana/
 F:	drivers/input/serio/hyperv-keyboard.c
-F:	drivers/iommu/hyperv-iommu.c
+F:	drivers/iommu/hyperv-irq.c
 F:	drivers/net/ethernet/microsoft/
 F:	drivers/net/hyperv/
 F:	drivers/pci/controller/pci-hyperv-intf.c
diff --git a/drivers/iommu/Kconfig b/drivers/iommu/Kconfig
index 99095645134f..b4cc2b42b338 100644
--- a/drivers/iommu/Kconfig
+++ b/drivers/iommu/Kconfig
@@ -355,6 +355,7 @@ config HYPERV_IOMMU
 	bool "Hyper-V IRQ Handling"
 	depends on HYPERV && X86
 	select IOMMU_API
+	select IRQ_REMAP
 	default HYPERV
 	help
 	  Stub IOMMU driver to handle IRQs to support Hyper-V Linux
diff --git a/drivers/iommu/Makefile b/drivers/iommu/Makefile
index 8e8843316c4b..598c39558e7d 100644
--- a/drivers/iommu/Makefile
+++ b/drivers/iommu/Makefile
@@ -30,7 +30,7 @@ obj-$(CONFIG_TEGRA_IOMMU_SMMU) += tegra-smmu.o
 obj-$(CONFIG_EXYNOS_IOMMU) += exynos-iommu.o
 obj-$(CONFIG_FSL_PAMU) += fsl_pamu.o fsl_pamu_domain.o
 obj-$(CONFIG_S390_IOMMU) += s390-iommu.o
-obj-$(CONFIG_HYPERV_IOMMU) += hyperv-iommu.o
+obj-$(CONFIG_HYPERV_IOMMU) += hyperv-irq.o
 obj-$(CONFIG_VIRTIO_IOMMU) += virtio-iommu.o
 obj-$(CONFIG_IOMMU_SVA) += iommu-sva.o
 obj-$(CONFIG_IOMMU_IOPF) += io-pgfault.o
diff --git a/drivers/iommu/hyperv-iommu.c b/drivers/iommu/hyperv-irq.c
similarity index 99%
rename from drivers/iommu/hyperv-iommu.c
rename to drivers/iommu/hyperv-irq.c
index 0961ac805944..1944440a5004 100644
--- a/drivers/iommu/hyperv-iommu.c
+++ b/drivers/iommu/hyperv-irq.c
@@ -24,8 +24,6 @@
 
 #include "irq_remapping.h"
 
-#ifdef CONFIG_IRQ_REMAP
-
 /*
  * According 82093AA IO-APIC spec , IO APIC has a 24-entry Interrupt
  * Redirection Table. Hyper-V exposes one single IO-APIC and so define
@@ -330,5 +328,3 @@ static const struct irq_domain_ops hyperv_root_ir_domain_ops = {
 	.alloc = hyperv_root_irq_remapping_alloc,
 	.free = hyperv_root_irq_remapping_free,
 };
-
-#endif
-- 
2.51.2.vfs.0.1