From: Penny Zheng <[email protected]> In MPU systems, we implement map_domain_page()/unmap_domain_page() through mapping the domain page with a MPU region on demand.
Signed-off-by: Penny Zheng <[email protected]> Signed-off-by: Wei Chen <[email protected]> Signed-off-by: Luca Fancellu <[email protected]> Signed-off-by: Harry Ramsey <[email protected]> --- v4: - Remove duplicate code by having `map_domain_page` and `unmap_domain_page` use `vmap_contig` and `vunmap` v3: - No changes v2: - No changes --- xen/arch/arm/Kconfig | 1 + xen/arch/arm/mpu/Makefile | 1 + xen/arch/arm/mpu/domain-page.c | 46 ++++++++++++++++++++++++++++++++++ 3 files changed, 48 insertions(+) create mode 100644 xen/arch/arm/mpu/domain-page.c diff --git a/xen/arch/arm/Kconfig b/xen/arch/arm/Kconfig index cf6af68299..baa6c4cf15 100644 --- a/xen/arch/arm/Kconfig +++ b/xen/arch/arm/Kconfig @@ -91,6 +91,7 @@ config MMU config MPU bool "MPU" if UNSUPPORTED + select ARCH_MAP_DOMAIN_PAGE if ARM_64 select STATIC_MEMORY help Memory Protection Unit (MPU). Select if you plan to run Xen on ARMv8-R diff --git a/xen/arch/arm/mpu/Makefile b/xen/arch/arm/mpu/Makefile index 4963c8b550..940297af3f 100644 --- a/xen/arch/arm/mpu/Makefile +++ b/xen/arch/arm/mpu/Makefile @@ -1,5 +1,6 @@ obj-$(CONFIG_ARM_32) += arm32/ obj-$(CONFIG_ARM_64) += arm64/ +obj-$(CONFIG_ARM_64) += domain-page.o obj-y += mm.o obj-y += p2m.o obj-y += setup.init.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..b79afc493b --- /dev/null +++ b/xen/arch/arm/mpu/domain-page.c @@ -0,0 +1,46 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ + +#include <xen/bug.h> +#include <xen/domain_page.h> +#include <xen/mm.h> +#include <xen/mm-frame.h> +#include <xen/types.h> +#include <xen/vmap.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) +{ + return vmap_contig(mfn, 1); +} + +/* Release a mapping taken with map_domain_page() */ +void unmap_domain_page(const void *ptr) +{ + vunmap(ptr); +} + +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: + */ -- 2.43.0
