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

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Message-ID: <ekeis5txhdipwwjlgywonvi43rbut2szihvzl4wkrdqkmh5mlt@udamdt7ff3vo>
Date: Fri, 6 Feb 2026 00:18:31 +0530
From: Anirudh Rayabharam <anirudh@...rudhrb.com>
To: Mukesh R <mrathor@...ux.microsoft.com>
Cc: 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, 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: Re: [PATCH v0 01/15] iommu/hyperv: rename hyperv-iommu.c to
 hyperv-irq.c

On Mon, Jan 19, 2026 at 10:42:16PM -0800, Mukesh R wrote:
> 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>

Reviewed-by: Anirudh Rayabharam (Microsoft) <anirudh@...rudhrb.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
>