From nobody Sat Jul 25 06:03:10 2026 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 8C171379C2E; Fri, 17 Jul 2026 06:44:48 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.242.206.163 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784270699; cv=none; b=SNO+5vYuaAcXX4w0dtjpma/kIqhxCiAGbm2U0GGHHZ5bWJaIJgddlsoODbf/P6rEt9dlZa8Bw2XDaLUVnGiKsJ5oxUtSpkHNECGg1lpRU43SC7pm92nsQm2RPTFNgBZypDAx5nzoY52yTe5d9kD6BN9U9C6LBI3evBhvsb3o5hg= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784270699; c=relaxed/simple; bh=7hRA0dProPOutyB2IiNvsAo+dWkQqnYN8bcnIHOQuo8=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=OCs2n99QrjIhsgNO69mjjz8/0it1yfP8gqVvI2Gj1nwG8TkINVeDJ59aDh4kjPPKjPwArbErwptU3/cpo4HcxDjeUOQNldd9zjigRaasrIOH4rgWOdHTUsvMInaST5A7Itdu3WC+t4haRb9OPVm6qO3Yz8ZuON/oC288dNIWw/Y= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.client-ip=114.242.206.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [10.2.5.213]) by gateway (Coremail) with SMTP id _____8Axz+tWz1lqKHYEAA--.17546S3; Fri, 17 Jul 2026 14:44:38 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by front1 (Coremail) with SMTP id qMiowJAxHsdMz1lqgcoPAA--.43739S3; Fri, 17 Jul 2026 14:44:37 +0800 (CST) From: Bibo Mao To: Huacai Chen , "Rafael J . Wysocki" Cc: Len Brown , Saket Dumbre , linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linux-acpi@vger.kernel.org, acpica-devel@lists.linux.dev, lixianglai@loongson.cn Subject: [PATCH v2 1/4] ACPI: LoongArch: Add acpi_arch_[late]_init() Date: Fri, 17 Jul 2026 14:37:10 +0800 Message-Id: <20260717063713.3638059-2-maobibo@loongson.cn> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20260717063713.3638059-1-maobibo@loongson.cn> References: <20260717063713.3638059-1-maobibo@loongson.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: qMiowJAxHsdMz1lqgcoPAA--.43739S3 X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Content-Type: text/plain; charset="utf-8" LoongArch IOMMU scanning flow is similar with virtio-iommu, there is early init and late_init. In early init function, PCI ACS is enabled if there is IOMMU table, and late_init is called after PCI device scanning, where IOVT table scanning function is executed. Here add acpi_arch_init() and acpi_arch_late_init() API on LoongArch, now they are both empty, In the future, IOVT table parsing will be added. Signed-off-by: Bibo Mao --- drivers/acpi/Makefile | 2 +- drivers/acpi/bus.c | 2 ++ drivers/acpi/loongarch/Makefile | 2 ++ drivers/acpi/loongarch/init.c | 11 +++++++++++ include/linux/acpi.h | 1 + 5 files changed, 17 insertions(+), 1 deletion(-) create mode 100644 drivers/acpi/loongarch/Makefile create mode 100644 drivers/acpi/loongarch/init.c diff --git a/drivers/acpi/Makefile b/drivers/acpi/Makefile index d1b0affb844f..91584a3c1e01 100644 --- a/drivers/acpi/Makefile +++ b/drivers/acpi/Makefile @@ -131,6 +131,6 @@ obj-y +=3D dptf/ obj-$(CONFIG_ARM64) +=3D arm64/ =20 obj-$(CONFIG_ACPI_VIOT) +=3D viot.o - +obj-$(CONFIG_LOONGARCH) +=3D loongarch/ obj-$(CONFIG_RISCV) +=3D riscv/ obj-$(CONFIG_X86) +=3D x86/ diff --git a/drivers/acpi/bus.c b/drivers/acpi/bus.c index a30a904f6535..5f6924b9e29d 100644 --- a/drivers/acpi/bus.c +++ b/drivers/acpi/bus.c @@ -1571,6 +1571,7 @@ struct kobject *acpi_kobj; EXPORT_SYMBOL_GPL(acpi_kobj); =20 void __weak __init acpi_arch_init(void) { } +void __weak __init acpi_arch_late_init(void) { } =20 static int __init acpi_init(void) { @@ -1609,6 +1610,7 @@ static int __init acpi_init(void) acpi_wakeup_device_init(); acpi_debugger_init(); acpi_setup_sb_notify_handler(); + acpi_arch_late_init(); acpi_viot_init(); return 0; } diff --git a/drivers/acpi/loongarch/Makefile b/drivers/acpi/loongarch/Makef= ile new file mode 100644 index 000000000000..d3764139dfaf --- /dev/null +++ b/drivers/acpi/loongarch/Makefile @@ -0,0 +1,2 @@ +# SPDX-License-Identifier: GPL-2.0-only +obj-y +=3D init.o diff --git a/drivers/acpi/loongarch/init.c b/drivers/acpi/loongarch/init.c new file mode 100644 index 000000000000..b11aa5c7d928 --- /dev/null +++ b/drivers/acpi/loongarch/init.c @@ -0,0 +1,11 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include + +void __init acpi_arch_init(void) +{ +} + +void __init acpi_arch_late_init(void) +{ +} diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 60ab50cb8930..c6a180341c2d 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -1617,6 +1617,7 @@ static inline int acpi_pptt_get_cpumask_from_cache_id= (u32 cache_id, #endif =20 void acpi_arch_init(void); +void acpi_arch_late_init(void); =20 #ifdef CONFIG_ACPI_PCC void acpi_init_pcc(void); --=20 2.39.3 From nobody Sat Jul 25 06:03:10 2026 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 3910C3BB10F; Fri, 17 Jul 2026 06:44:50 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.242.206.163 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784270703; cv=none; b=fQFWyY5h+L3YGCMyXl5pTae4UQs6Oa4yxMT+1nkVZyLiAaoQKZWR6Qhr73TA68gCPKFKqfsRNkAYvx29bHzpK5+q49zqBYEgAg+tf1T415U+qF+BoISKnujN96PcfxYIPQXh3PBZnDsLENVyH2zCyh2G/vNIZ5PpnQd9/ZrThcQ= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784270703; c=relaxed/simple; bh=fVMXiyzgNu3GWMWe8ZX+V7ZK5dBLSFkEEd5gQjWMCSw=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=gh+g+OqusKeinCQ4PltV14OSTX/54JHYExTidZ7jHwIj4zNYwWXrtTufK2qTfuVM5JybIC1MzNiOitY3fT9L6TLzrXYspxkBJSDhmKJLHsSOqyjpCfcbwMr2tOSpZVtQf95NF9i9QHdKql1c7jJPZm/ccNJT/ftdMiO5sTsJiZ4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.client-ip=114.242.206.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [10.2.5.213]) by gateway (Coremail) with SMTP id _____8Axx+pWz1lqLXYEAA--.17871S3; Fri, 17 Jul 2026 14:44:38 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by front1 (Coremail) with SMTP id qMiowJAxHsdMz1lqgcoPAA--.43739S4; Fri, 17 Jul 2026 14:44:37 +0800 (CST) From: Bibo Mao To: Huacai Chen , "Rafael J . Wysocki" Cc: Len Brown , Saket Dumbre , linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linux-acpi@vger.kernel.org, acpica-devel@lists.linux.dev, lixianglai@loongson.cn Subject: [PATCH v2 2/4] ACPI: LoongArch: Add IOVT device entry table scanning Date: Fri, 17 Jul 2026 14:37:11 +0800 Message-Id: <20260717063713.3638059-3-maobibo@loongson.cn> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20260717063713.3638059-1-maobibo@loongson.cn> References: <20260717063713.3638059-1-maobibo@loongson.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: qMiowJAxHsdMz1lqgcoPAA--.43739S4 X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Content-Type: text/plain; charset="utf-8" Similar with acpi_arch_init()/acpi_arch_late_init(), here function acpi_iovt_init()/acpi_iovt_late_init() is added. Function acpi_iovt_init() is to enable PCI ACS function if IOMMU device exists in IOVT table, and function acpi_iovt_late_init() is to scan IOVT table, add IOMMU devices. Signed-off-by: Bibo Mao --- drivers/acpi/Kconfig | 4 + drivers/acpi/loongarch/Kconfig | 7 + drivers/acpi/loongarch/Makefile | 1 + drivers/acpi/loongarch/init.c | 5 + drivers/acpi/loongarch/init.h | 5 + drivers/acpi/loongarch/iovt.c | 219 ++++++++++++++++++++++++++++++++ include/acpi/actbl2.h | 3 + 7 files changed, 244 insertions(+) create mode 100644 drivers/acpi/loongarch/Kconfig create mode 100644 drivers/acpi/loongarch/init.h create mode 100644 drivers/acpi/loongarch/iovt.c diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig index f165d14cf61a..192e6f18eda1 100644 --- a/drivers/acpi/Kconfig +++ b/drivers/acpi/Kconfig @@ -550,6 +550,10 @@ if ARM64 source "drivers/acpi/arm64/Kconfig" endif =20 +if LOONGARCH +source "drivers/acpi/loongarch/Kconfig" +endif + if RISCV source "drivers/acpi/riscv/Kconfig" endif diff --git a/drivers/acpi/loongarch/Kconfig b/drivers/acpi/loongarch/Kconfig new file mode 100644 index 000000000000..91ba3c35b9bf --- /dev/null +++ b/drivers/acpi/loongarch/Kconfig @@ -0,0 +1,7 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# ACPI Configuration for LOONGARCH +# + +config ACPI_IOVT + bool diff --git a/drivers/acpi/loongarch/Makefile b/drivers/acpi/loongarch/Makef= ile index d3764139dfaf..c338d3102fc1 100644 --- a/drivers/acpi/loongarch/Makefile +++ b/drivers/acpi/loongarch/Makefile @@ -1,2 +1,3 @@ # SPDX-License-Identifier: GPL-2.0-only obj-y +=3D init.o +obj-$(CONFIG_ACPI_IOVT) +=3D iovt.o diff --git a/drivers/acpi/loongarch/init.c b/drivers/acpi/loongarch/init.c index b11aa5c7d928..e7272ee197c7 100644 --- a/drivers/acpi/loongarch/init.c +++ b/drivers/acpi/loongarch/init.c @@ -1,11 +1,16 @@ // SPDX-License-Identifier: GPL-2.0-only =20 #include +#include "init.h" =20 void __init acpi_arch_init(void) { + if (IS_ENABLED(CONFIG_ACPI_IOVT)) + acpi_iovt_init(); } =20 void __init acpi_arch_late_init(void) { + if (IS_ENABLED(CONFIG_ACPI_IOVT)) + acpi_iovt_late_init(); } diff --git a/drivers/acpi/loongarch/init.h b/drivers/acpi/loongarch/init.h new file mode 100644 index 000000000000..85e5197553ad --- /dev/null +++ b/drivers/acpi/loongarch/init.h @@ -0,0 +1,5 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +#include + +void __init acpi_iovt_init(void); +void __init acpi_iovt_late_init(void); diff --git a/drivers/acpi/loongarch/iovt.c b/drivers/acpi/loongarch/iovt.c new file mode 100644 index 000000000000..fb384664ba78 --- /dev/null +++ b/drivers/acpi/loongarch/iovt.c @@ -0,0 +1,219 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include +#include +#include "init.h" + +struct iovt_device_entry { + struct list_head list; + int start_devid; + int end_devid; +}; + +struct iovt_fwnode { + struct list_head list; + struct fwnode_handle *fwnode; + int flag; + int segment; + int devid; + int nid; + struct list_head ep_list; +}; + +/* Root pointer to the mapped IOVT table */ +static LIST_HEAD(iovt_fwnode_list); +static DEFINE_SPINLOCK(iovt_fwnode_lock); + +#ifdef CONFIG_PCI +static void __init iovt_enable_acs(struct acpi_iovt_iommu *iommu) +{ + static bool acs_enabled __initdata; + + if (acs_enabled) + return; + + /* IOMMU V1 only supports PCI device management */ + if ((iommu->header.type =3D=3D ACPI_IOVT_IOMMU_V1) || + (iommu->flags & (ACPI_IOVT_PCI_DEVICE | ACPI_IOVT_MAGAGE_BY_SEGMENT))) { + pci_request_acs(); + acs_enabled =3D true; + } +} +#else +static inline void iovt_enable_acs(struct acpi_iovt_iommu *iommu) { } +#endif + +static int __init iovt_get_pci_iommu_fwnode(struct iovt_fwnode *np, u16 se= gment, u16 bdf) +{ + struct pci_dev *pdev; + struct fwnode_handle *fwnode; + + pdev =3D pci_get_domain_bus_and_slot(segment, PCI_BUS_NUM(bdf), bdf & 0xf= f); + if (!pdev) { + pr_err("No PCI IOMMU found for segment 0x%x bdf 0x%x\n", segment, bdf); + return -ENODEV; + } + + fwnode =3D dev_fwnode(&pdev->dev); + if (!fwnode) { + /* + * PCI devices aren't necessarily described by ACPI. Create a + * fwnode so the IOMMU subsystem can identify this device. + */ + fwnode =3D acpi_alloc_fwnode_static(); + if (!fwnode) { + pci_dev_put(pdev); + return -ENOMEM; + } + set_primary_fwnode(&pdev->dev, fwnode); + } + + np->fwnode =3D dev_fwnode(&pdev->dev); + if (np->flag & ACPI_IOVT_PXM_VALID) + set_dev_node(&pdev->dev, np->nid); + pci_dev_put(pdev); + return 0; +} + +static int __init iovt_add_iommu(struct acpi_iovt_iommu *iommu) +{ + struct iovt_fwnode *np; + struct fwnode_handle *fwnode; + struct acpi_iovt_device_entry *ep; + struct iovt_device_entry *entry; + int i, ret, start_devid; + bool is_start =3D false; + + np =3D kzalloc_obj(struct iovt_fwnode, GFP_ATOMIC); + if (WARN_ON(!np)) + return -ENOMEM; + + INIT_LIST_HEAD(&np->list); + np->flag =3D iommu->flags; + np->segment =3D iommu->segment; + if (np->flag & ACPI_IOVT_PXM_VALID) + np->nid =3D pxm_to_node(iommu->proximity_domain); + + if (np->flag & ACPI_IOVT_PCI_DEVICE) { + np->devid =3D iommu->device_id; + ret =3D iovt_get_pci_iommu_fwnode(np, np->segment, np->devid); + if (ret) { + kfree(np); + return ret; + } + + } else { + fwnode =3D acpi_alloc_fwnode_static(); + if (!fwnode) { + kfree(np); + return -ENOMEM; + } + + np->fwnode =3D fwnode; + } + + /* All devices in the segment are managed by this IOMMU */ + if (np->flag & ACPI_IOVT_MAGAGE_BY_SEGMENT) + goto skip; + + INIT_LIST_HEAD(&np->ep_list); + ep =3D ACPI_ADD_PTR(struct acpi_iovt_device_entry, iommu, iommu->device_e= ntry_offset); + for (i =3D 0; i < iommu->device_entry_num; i++) { + switch (ep->type) { + case ACPI_IOVT_DEVICE_ENTRY_START: + is_start =3D true; + start_devid =3D ep->device_id; + break; + case ACPI_IOVT_DEVICE_ENTRY_END: + if (!is_start) + break; + + entry =3D kzalloc_obj(struct iovt_device_entry, GFP_ATOMIC); + if (!entry) + return -ENOMEM; + + entry->start_devid =3D start_devid; + entry->end_devid =3D ep->device_id; + list_add_tail(&entry->list, &np->ep_list); + is_start =3D false; + break; + case ACPI_IOVT_DEVICE_ENTRY_SINGLE: + entry =3D kzalloc_obj(struct iovt_device_entry, GFP_ATOMIC); + if (!entry) + return -ENOMEM; + + entry->start_devid =3D ep->device_id; + entry->end_devid =3D ep->device_id; + list_add_tail(&entry->list, &np->ep_list); + is_start =3D false; + break; + default: + break; + } + ep =3D ACPI_ADD_PTR(struct acpi_iovt_device_entry, ep, ep->length); + } + +skip: + spin_lock(&iovt_fwnode_lock); + list_add_tail(&np->list, &iovt_fwnode_list); + spin_unlock(&iovt_fwnode_lock); + return 0; +} + +static void __init iovt_init_devices(struct acpi_table_header *header) +{ + struct acpi_iovt_iommu *iommu; + struct acpi_table_iovt *iovt; + int i; + + /* Get the first IOVT node */ + iovt =3D (struct acpi_table_iovt *)header; + iommu =3D ACPI_ADD_PTR(struct acpi_iovt_iommu, iovt, iovt->iommu_offset); + for (i =3D 0; i < iovt->iommu_count; i++) { + iovt_add_iommu(iommu); + iommu =3D ACPI_ADD_PTR(struct acpi_iovt_iommu, iommu, iommu->header.leng= th); + } +} + +void __init acpi_iovt_init(void) +{ + acpi_status status; + struct acpi_table_header *hdr; + struct acpi_table_iovt *iovt; + struct acpi_iovt_iommu *iommu; + int i; + + status =3D acpi_get_table(ACPI_SIG_IOVT, 0, &hdr); + if (ACPI_FAILURE(status)) { + if (status !=3D AE_NOT_FOUND) + pr_err("Failed to get table, %s\n", acpi_format_exception(status)); + + return; + } + + iovt =3D (struct acpi_table_iovt *)&hdr; + iommu =3D ACPI_ADD_PTR(struct acpi_iovt_iommu, iovt, iovt->iommu_offset); + for (i =3D 0; i < iovt->iommu_count; i++) { + iovt_enable_acs(iommu); + iommu =3D ACPI_ADD_PTR(struct acpi_iovt_iommu, iommu, iommu->header.leng= th); + } + + acpi_put_table(hdr); +} + +void __init acpi_iovt_late_init(void) +{ + acpi_status status; + struct acpi_table_header *hdr; + + status =3D acpi_get_table(ACPI_SIG_IOVT, 0, &hdr); + if (ACPI_FAILURE(status)) { + if (status !=3D AE_NOT_FOUND) + pr_err("Failed to get table, %s\n", acpi_format_exception(status)); + + return; + } + + iovt_init_devices(hdr); + acpi_put_table(hdr); +} diff --git a/include/acpi/actbl2.h b/include/acpi/actbl2.h index baef525367b5..acc51a42c3ed 100644 --- a/include/acpi/actbl2.h +++ b/include/acpi/actbl2.h @@ -892,6 +892,9 @@ struct acpi_iovt_header { =20 /* Values for Type field above */ =20 +#define ACPI_IOVT_PCI_DEVICE BIT(0) +#define ACPI_IOVT_PXM_VALID BIT(1) +#define ACPI_IOVT_MAGAGE_BY_SEGMENT BIT(2) enum acpi_iovt_iommu_type { ACPI_IOVT_IOMMU_V1 =3D 0x00, ACPI_IOVT_IOMMU_RESERVED =3D 0x01 /* 1 and greater are reserved */ --=20 2.39.3 From nobody Sat Jul 25 06:03:10 2026 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 01E623BB670; 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dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [10.2.5.213]) by gateway (Coremail) with SMTP id _____8Cx7+tWz1lqMXYEAA--.17773S3; Fri, 17 Jul 2026 14:44:38 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by front1 (Coremail) with SMTP id qMiowJAxHsdMz1lqgcoPAA--.43739S5; Fri, 17 Jul 2026 14:44:38 +0800 (CST) From: Bibo Mao To: Huacai Chen , "Rafael J . Wysocki" Cc: Len Brown , Saket Dumbre , linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linux-acpi@vger.kernel.org, acpica-devel@lists.linux.dev, lixianglai@loongson.cn Subject: [PATCH v2 3/4] ACPI: scan: Add support for LoongArch in acpi_iommu_configure_id() Date: Fri, 17 Jul 2026 14:37:12 +0800 Message-Id: <20260717063713.3638059-4-maobibo@loongson.cn> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20260717063713.3638059-1-maobibo@loongson.cn> References: <20260717063713.3638059-1-maobibo@loongson.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: qMiowJAxHsdMz1lqgcoPAA--.43739S5 X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Content-Type: text/plain; charset="utf-8" acpi_iommu_configure_id() currently supports only IORT and VIOT. Add support for IOVT as well. Signed-off-by: Bibo Mao Acked-by: Rafael J. Wysocki (Intel) # ACPI core --- drivers/acpi/loongarch/iovt.c | 61 +++++++++++++++++++++++++++++++++++ drivers/acpi/scan.c | 3 ++ include/linux/acpi_iovt.h | 13 ++++++++ 3 files changed, 77 insertions(+) create mode 100644 include/linux/acpi_iovt.h diff --git a/drivers/acpi/loongarch/iovt.c b/drivers/acpi/loongarch/iovt.c index fb384664ba78..09fcf09e0f85 100644 --- a/drivers/acpi/loongarch/iovt.c +++ b/drivers/acpi/loongarch/iovt.c @@ -1,6 +1,7 @@ // SPDX-License-Identifier: GPL-2.0-only =20 #include +#include #include #include "init.h" =20 @@ -217,3 +218,63 @@ void __init acpi_iovt_late_init(void) iovt_init_devices(hdr); acpi_put_table(hdr); } + +static int iovt_pci_dev_iommu_init(struct pci_dev *pdev, u16 dev_id, void = *data) +{ + u32 sbdf; + struct iovt_fwnode *np; + struct device *aliased_dev =3D data; + u32 domain =3D pci_domain_nr(pdev->bus); + struct iovt_device_entry *entry; + bool found =3D false; + + list_for_each_entry(np, &iovt_fwnode_list, list) { + if (domain !=3D np->segment) + continue; + + /* We're not translating ourself */ + if (dev_id =3D=3D np->devid) + return -EINVAL; + + if (np->flag & ACPI_IOVT_MAGAGE_BY_SEGMENT) { + found =3D true; + break; + } + + list_for_each_entry(entry, &np->ep_list, list) { + if (dev_id < entry->start_devid) + continue; + + if (dev_id > entry->end_devid) + continue; + + found =3D true; + break; + } + + if (found) + break; + } + + if (!found) + return -ENODEV; + + sbdf =3D (domain << 16) + dev_id; + return acpi_iommu_fwspec_init(aliased_dev, sbdf, np->fwnode); +} + +/* + * iovt_iommu_configure_id - Set-up IOMMU configuration for a device. + * + * @dev: device to configure + * @id_in: optional input id const value pointer + * + * Returns: 0 on success, <0 on failure + */ +int iovt_iommu_configure_id(struct device *dev, const u32 *id_in) +{ + if (!dev_is_pci(dev)) + return -ENODEV; + + return pci_for_each_dma_alias(to_pci_dev(dev), iovt_pci_dev_iommu_init, d= ev); +} diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 9a7ac2eb9ce0..508575f25e10 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -13,6 +13,7 @@ #include #include #include +#include #include #include #include @@ -1629,6 +1630,8 @@ static int acpi_iommu_configure_id(struct device *dev= , const u32 *id_in) err =3D rimt_iommu_configure_id(dev, id_in); if (err && err !=3D -EPROBE_DEFER) err =3D viot_iommu_configure(dev); + if (err && err !=3D -EPROBE_DEFER) + err =3D iovt_iommu_configure_id(dev, id_in); =20 mutex_unlock(&iommu_probe_device_lock); =20 diff --git a/include/linux/acpi_iovt.h b/include/linux/acpi_iovt.h new file mode 100644 index 000000000000..25a846b96260 --- /dev/null +++ b/include/linux/acpi_iovt.h @@ -0,0 +1,13 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#ifndef __ACPI_IOVT_H__ +#define __ACPI_IOVT_H__ + +#if defined(CONFIG_IOMMU_API) && defined(CONFIG_ACPI_IOVT) +int iovt_iommu_configure_id(struct device *dev, const u32 *id_in); +#else +static inline int iovt_iommu_configure_id(struct device *dev, const u32 *i= d_in) +{ return -ENODEV; } +#endif + +#endif --=20 2.39.3 From nobody Sat Jul 25 06:03:10 2026 Received: from mail.loongson.cn (mail.loongson.cn [114.242.206.163]) by smtp.subspace.kernel.org (Postfix) with ESMTP id EF8803C109E; Fri, 17 Jul 2026 06:44:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=114.242.206.163 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784270714; cv=none; b=eqRtgv2X+kauiHgnDFW8lkrX/qAOXLfeHGMYpbw4MqbTqguPRL7oMDoHfaEQJSJQbgAm1in0AfMqnnyEdmCNXXgtLvekGvlornrziBgFt34p7Al3s53UnKVMauuk2G9Q7q83sbmsuAOcO25sga1ycoekAis/7Xhk7YajxAfSQ5Q= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784270714; c=relaxed/simple; bh=WOL0l221EVL0EQLvBdanmj6khszyikYykIOgdHGUeiA=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=gGoIZoNzjEK0WgzRC6mhdWOTOORDWBLYHov4JyjpyMWTPylGglZdGpK7MUMFVPdyn+Ro0RtXQo57gs5YojlSVuNG9Vz0mItalIM5BfMENkZ1lsWuyoVLyNal0zDjjY3qLOhmdGs/5vrv4xyo8JKechQ6ZA/Rw4MUgyWswlLJJyI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn; spf=pass smtp.mailfrom=loongson.cn; arc=none smtp.client-ip=114.242.206.163 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=loongson.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=loongson.cn Received: from loongson.cn (unknown [10.2.5.213]) by gateway (Coremail) with SMTP id _____8BxyvBaz1lqNnYEAA--.17765S3; Fri, 17 Jul 2026 14:44:42 +0800 (CST) Received: from localhost.localdomain (unknown [10.2.5.213]) by front1 (Coremail) with SMTP id qMiowJAxDcVYz1lqiMoPAA--.17706S2; Fri, 17 Jul 2026 14:44:40 +0800 (CST) From: Bibo Mao To: Huacai Chen , "Rafael J . Wysocki" Cc: Len Brown , Saket Dumbre , linux-kernel@vger.kernel.org, loongarch@lists.linux.dev, linux-acpi@vger.kernel.org, acpica-devel@lists.linux.dev, lixianglai@loongson.cn Subject: [PATCH v2 4/4] MAINTAINERS: Add entry for drivers/acpi/loongarch Date: Fri, 17 Jul 2026 14:37:13 +0800 Message-Id: <20260717063713.3638059-5-maobibo@loongson.cn> X-Mailer: git-send-email 2.39.3 In-Reply-To: <20260717063713.3638059-1-maobibo@loongson.cn> References: <20260717063713.3638059-1-maobibo@loongson.cn> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-CM-TRANSID: qMiowJAxDcVYz1lqiMoPAA--.17706S2 X-CM-SenderInfo: xpdruxter6z05rqj20fqof0/ X-Coremail-Antispam: 1Uk129KBjDUn29KB7ZKAUJUUUUU529EdanIXcx71UUUUU7KY7 ZEXasCq-sGcSsGvfJ3UbIjqfuFe4nvWSU5nxnvy29KBjDU0xBIdaVrnUUvcSsGvfC2Kfnx nUUI43ZEXa7xR_UUUUUUUUU== Content-Type: text/plain; charset="utf-8" ACPI defines few LoongArch specific tables which need parsing code added in drivers/acpi/loongarch. Add maintainer entries for this newly created folder. Signed-off-by: Bibo Mao --- MAINTAINERS | 9 +++++++++ arch/loongarch/Kconfig | 1 + 2 files changed, 10 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index ce5c5185c773..d741f87fcf8c 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -348,6 +348,15 @@ S: Maintained F: drivers/acpi/riscv/ F: include/linux/acpi_rimt.h =20 +ACPI FOR LoongArch (ACPI/LoongArch) +M: Bibo Mao +R: Huacai Chen +L: linux-acpi@vger.kernel.org +L: loongarch@lists.linux.dev +S: Maintained +F: drivers/acpi/loongarch/ +F: include/linux/acpi_iovt.h + ACPI PCC(Platform Communication Channel) MAILBOX DRIVER M: Sudeep Holla L: linux-acpi@vger.kernel.org diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index d8d252325017..ee3d591ace04 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -6,6 +6,7 @@ config LOONGARCH select ACPI_GENERIC_GSI if ACPI select ACPI_MCFG if ACPI select ACPI_HOTPLUG_CPU if ACPI_PROCESSOR && HOTPLUG_CPU + select ACPI_IOVT if ACPI select ACPI_PPTT if ACPI select ACPI_SYSTEM_POWER_STATES_SUPPORT if ACPI select ARCH_BINFMT_ELF_STATE --=20 2.39.3