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pr=C From: Ayan Kumar Halder To: CC: Ayan Kumar Halder , Stefano Stabellini , Julien Grall , Bertrand Marquis , Michal Orzel , "Volodymyr Babchuk" Subject: [PATCH v4 3/3] xen/arm32: mpu: Stubs to build MPU for arm32 Date: Thu, 3 Apr 2025 18:12:41 +0100 Message-ID: <20250403171241.975377-4-ayan.kumar.halder@amd.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20250403171241.975377-1-ayan.kumar.halder@amd.com> References: <20250403171241.975377-1-ayan.kumar.halder@amd.com> MIME-Version: 1.0 Received-SPF: None (SATLEXMB04.amd.com: ayan.kumar.halder@amd.com does not designate permitted sender hosts) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: CO1PEPF000044F0:EE_|CYXPR12MB9425:EE_ X-MS-Office365-Filtering-Correlation-Id: 862b974f-9f7a-4d42-5303-08dd72d2ca9c X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|82310400026|1800799024|36860700013|376014; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230040)(82310400026)(1800799024)(36860700013)(376014);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 03 Apr 2025 17:13:02.3013 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 862b974f-9f7a-4d42-5303-08dd72d2ca9c X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: CO1PEPF000044F0.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: CYXPR12MB9425 Add stubs to enable compilation Signed-off-by: Ayan Kumar Halder --- Changes from :- v1, v2 - 1. New patch introduced in v3. 2. Should be applied on top of https://patchwork.kernel.org/project/xen-devel/cover/20250316192445.2376484-1-luca.fancellu@arm.com/ v3 - 1. Add stubs for map_domain_page() and similar functions. 2. 'BUG_ON("unimplemented")' is kept in all the stubs. xen/arch/arm/arm32/mpu/Makefile | 2 ++ xen/arch/arm/arm32/mpu/p2m.c | 18 ++++++++++++++ xen/arch/arm/arm32/mpu/smpboot.c | 23 ++++++++++++++++++ xen/arch/arm/include/asm/mm.h | 5 ++++ xen/arch/arm/mpu/Makefile | 1 + xen/arch/arm/mpu/domain_page.c | 40 ++++++++++++++++++++++++++++++++ 6 files changed, 89 insertions(+) create mode 100644 xen/arch/arm/arm32/mpu/p2m.c create mode 100644 xen/arch/arm/arm32/mpu/smpboot.c create mode 100644 xen/arch/arm/mpu/domain_page.c diff --git a/xen/arch/arm/arm32/mpu/Makefile b/xen/arch/arm/arm32/mpu/Makefile index 3340058c08..38797f28af 100644 --- a/xen/arch/arm/arm32/mpu/Makefile +++ b/xen/arch/arm/arm32/mpu/Makefile @@ -1 +1,3 @@ obj-y += head.o +obj-y += smpboot.o +obj-y += p2m.o diff --git a/xen/arch/arm/arm32/mpu/p2m.c b/xen/arch/arm/arm32/mpu/p2m.c new file mode 100644 index 0000000000..df8de5c7d8 --- /dev/null +++ b/xen/arch/arm/arm32/mpu/p2m.c @@ -0,0 +1,18 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include +#include + +void __init setup_virt_paging(void) +{ + BUG_ON("unimplemented"); +} + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/arch/arm/arm32/mpu/smpboot.c b/xen/arch/arm/arm32/mpu/smpboot.c new file mode 100644 index 0000000000..3f3e54294e --- /dev/null +++ b/xen/arch/arm/arm32/mpu/smpboot.c @@ -0,0 +1,23 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include + +int prepare_secondary_mm(int cpu) +{ + BUG_ON("unimplemented"); + return -EINVAL; +} + +void update_boot_mapping(bool enable) +{ + BUG_ON("unimplemented"); +} + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */ diff --git a/xen/arch/arm/include/asm/mm.h b/xen/arch/arm/include/asm/mm.h index fbffaccef4..2a52cf530f 100644 --- a/xen/arch/arm/include/asm/mm.h +++ b/xen/arch/arm/include/asm/mm.h @@ -171,12 +171,17 @@ struct page_info #define PGC_need_scrub PGC_allocated #ifdef CONFIG_ARM_32 +#ifdef CONFIG_MPU +#define is_xen_heap_page(page) ({ BUG_ON("unimplemented"); false; }) +#define is_xen_heap_mfn(mfn) ({ BUG_ON("unimplemented"); false; }) +#else /* !CONFIG_MPU */ #define is_xen_heap_page(page) is_xen_heap_mfn(page_to_mfn(page)) #define is_xen_heap_mfn(mfn) ({ \ unsigned long mfn_ = mfn_x(mfn); \ (mfn_ >= mfn_x(directmap_mfn_start) && \ mfn_ < mfn_x(directmap_mfn_end)); \ }) +#endif /* !CONFIG_MPU */ #else #define is_xen_heap_page(page) ((page)->count_info & PGC_xen_heap) #define is_xen_heap_mfn(mfn) \ diff --git a/xen/arch/arm/mpu/Makefile b/xen/arch/arm/mpu/Makefile index 21bbc517b5..ff221011d5 100644 --- a/xen/arch/arm/mpu/Makefile +++ b/xen/arch/arm/mpu/Makefile @@ -2,3 +2,4 @@ obj-y += mm.o obj-y += p2m.o obj-y += setup.init.o obj-y += vmap.o +obj-$(CONFIG_ARM_32) += domain_page.o diff --git a/xen/arch/arm/mpu/domain_page.c b/xen/arch/arm/mpu/domain_page.c new file mode 100644 index 0000000000..b9ebb03d67 --- /dev/null +++ b/xen/arch/arm/mpu/domain_page.c @@ -0,0 +1,40 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +#include + +void *map_domain_page_global(mfn_t mfn) +{ + BUG_ON("unimplemented"); + return (void*)0; +} + +/* Map a page of domheap memory */ +void *map_domain_page(mfn_t mfn) +{ + BUG_ON("unimplemented"); + return (void*)0; +} + +/* Release a mapping taken with map_domain_page() */ +void unmap_domain_page(const void *ptr) +{ + BUG_ON("unimplemented"); +} + +mfn_t domain_page_map_to_mfn(const void *ptr) +{ + BUG_ON("unimplemented"); +} + +void unmap_domain_page_global(const void *va) +{ + BUG_ON("unimplemented"); +} + +/* + * Local variables: + * mode: C + * c-file-style: "BSD" + * c-basic-offset: 4 + * indent-tabs-mode: nil + * End: + */