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]> --- xen/arch/arm/Kconfig | 1 + xen/arch/arm/mpu/Makefile | 1 + xen/arch/arm/mpu/domain-page.c | 53 ++++++++++++++++++++++++++++++++++ 3 files changed, 55 insertions(+) create mode 100644 xen/arch/arm/mpu/domain-page.c diff --git a/xen/arch/arm/Kconfig b/xen/arch/arm/Kconfig index a5c111e08e..dac9a16c28 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 ARM_SECURE_STATE if ARM_64 select STATIC_MEMORY help 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..9248053ff5 --- /dev/null +++ b/xen/arch/arm/mpu/domain-page.c @@ -0,0 +1,53 @@ +/* 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> + +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) +{ + paddr_t pa = mfn_to_maddr(mfn); + + if ( map_pages_to_xen((unsigned long)pa, mfn, 1, PAGE_HYPERVISOR_RW) ) + return NULL; + + return maddr_to_virt(pa); +} + +/* Release a mapping taken with map_domain_page() */ +void unmap_domain_page(const void *ptr) +{ + paddr_t base = virt_to_maddr(ptr); + + if ( destroy_entire_xen_mapping(base) ) + panic("Failed to unmap domain page\n"); +} + +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
