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From: Ayan Kumar Halder <ayan.kumar.halder@amd.com>
To: <xen-devel@lists.xenproject.org>
Cc: Ayan Kumar Halder <ayan.kumar.halder@amd.com>,
	Stefano Stabellini <sstabellini@kernel.org>,
	Julien Grall <julien@xen.org>,
	Bertrand Marquis <bertrand.marquis@arm.com>,
	Michal Orzel <michal.orzel@amd.com>,
	"Volodymyr Babchuk" <Volodymyr_Babchuk@epam.com>
Subject: [PATCH v1 2/2] arm/mpu: Disable map_domain_page for MPU
Date: Thu, 7 Aug 2025 18:45:29 +0100	[thread overview]
Message-ID: <20250807174529.595577-3-ayan.kumar.halder@amd.com> (raw)
In-Reply-To: <20250807174529.595577-1-ayan.kumar.halder@amd.com>

There is no domheap for ARM_32. All of the RAM is mapped and VA == PA.

Signed-off-by: Ayan Kumar Halder <ayan.kumar.halder@amd.com>
---
 xen/arch/arm/Kconfig           |  2 +-
 xen/arch/arm/mpu/domain-page.c | 45 ----------------------------------
 2 files changed, 1 insertion(+), 46 deletions(-)
 delete mode 100644 xen/arch/arm/mpu/domain-page.c

diff --git a/xen/arch/arm/Kconfig b/xen/arch/arm/Kconfig
index a0c8160474..5355534f3d 100644
--- a/xen/arch/arm/Kconfig
+++ b/xen/arch/arm/Kconfig
@@ -1,7 +1,7 @@
 config ARM_32
 	def_bool y
 	depends on "$(ARCH)" = "arm32"
-	select ARCH_MAP_DOMAIN_PAGE
+	select ARCH_MAP_DOMAIN_PAGE if MMU
 
 config ARM_64
 	def_bool y
diff --git a/xen/arch/arm/mpu/domain-page.c b/xen/arch/arm/mpu/domain-page.c
deleted file mode 100644
index df5e06b6db..0000000000
--- a/xen/arch/arm/mpu/domain-page.c
+++ /dev/null
@@ -1,45 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-only */
-
-#include <xen/bug.h>
-#include <xen/domain_page.h>
-#include <xen/mm-frame.h>
-#include <xen/types.h>
-
-void *map_domain_page_global(mfn_t mfn)
-{
-    BUG_ON("unimplemented");
-    return NULL;
-}
-
-/* Map a page of domheap memory */
-void *map_domain_page(mfn_t mfn)
-{
-    BUG_ON("unimplemented");
-    return NULL;
-}
-
-/* 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");
-    return INVALID_MFN;
-}
-
-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:
- */
-- 
2.25.1



  parent reply	other threads:[~2025-08-07 17:46 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2025-08-07 17:45 [PATCH v1 0/2] R52 MPU support (for "Third series for R82 MPU") Ayan Kumar Halder
2025-08-07 17:45 ` [PATCH v1 1/2] arm/mpu: Enable is_xen_heap_page and co for ARM_32 Ayan Kumar Halder
2025-08-12 10:30   ` Hari Limaye
2025-08-14  8:24     ` Ayan Kumar Halder
2025-08-07 17:45 ` Ayan Kumar Halder [this message]
2025-08-12 10:49   ` [PATCH v1 2/2] arm/mpu: Disable map_domain_page for MPU Hari Limaye

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