diff options
author | Heiko Carstens <hca@linux.ibm.com> | 2024-03-07 15:28:27 +0300 |
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committer | Heiko Carstens <hca@linux.ibm.com> | 2024-03-13 11:23:49 +0300 |
commit | 5f58bde7264704fec2058afc219a3557f02f3d8f (patch) | |
tree | 752aa0dbbe00bedbac8bc6475c66a21b1f65ab5f /arch/s390/mm/physaddr.c | |
parent | bd36cfbbb9e1aa2561d488885423c65d519aac0d (diff) | |
download | linux-5f58bde7264704fec2058afc219a3557f02f3d8f.tar.xz |
s390/mm: provide simple ARCH_HAS_DEBUG_VIRTUAL support
Provide a very simple ARCH_HAS_DEBUG_VIRTUAL implementation.
For now errors are only reported for the following cases:
- Trying to translate a vmalloc or module address to a physical address
- Translating a supposed to be ZONE_DMA virtual address into a physical
address, and the resulting physical address is larger than two GiB
Reviewed-by: Alexander Gordeev <agordeev@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Diffstat (limited to 'arch/s390/mm/physaddr.c')
-rw-r--r-- | arch/s390/mm/physaddr.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/s390/mm/physaddr.c b/arch/s390/mm/physaddr.c new file mode 100644 index 000000000000..59de866c72d9 --- /dev/null +++ b/arch/s390/mm/physaddr.c @@ -0,0 +1,15 @@ +// SPDX-License-Identifier: GPL-2.0 +#include <linux/mmdebug.h> +#include <linux/export.h> +#include <linux/mm.h> +#include <asm/page.h> + +unsigned long __phys_addr(unsigned long x, bool is_31bit) +{ + VIRTUAL_BUG_ON(is_vmalloc_or_module_addr((void *)(x))); + x = __pa_nodebug(x); + if (is_31bit) + VIRTUAL_BUG_ON(x >> 31); + return x; +} +EXPORT_SYMBOL(__phys_addr); |