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s390/mm: provide simple ARCH_HAS_DEBUG_VIRTUAL support

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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>
This commit is contained in:
Heiko Carstens
2024-03-07 13:28:27 +01:00
parent bd36cfbbb9
commit 5f58bde726
7 changed files with 48 additions and 3 deletions
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30
arch/s390/include/asm/page.h
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@@ -181,9 +181,35 @@ int arch_make_page_accessible(struct page *page);
#define __PAGE_OFFSET 0x0UL
#define PAGE_OFFSET 0x0UL
#define __pa(x) ((unsigned long)(x))
#define __pa_nodebug(x) ((unsigned long)(x))
#ifdef __DECOMPRESSOR
#define __pa(x) __pa_nodebug(x)
#define __pa32(x) __pa(x)
#define __va(x) ((void *)(unsigned long)(x))
#else /* __DECOMPRESSOR */
#ifdef CONFIG_DEBUG_VIRTUAL
unsigned long __phys_addr(unsigned long x, bool is_31bit);
#else /* CONFIG_DEBUG_VIRTUAL */
static inline unsigned long __phys_addr(unsigned long x, bool is_31bit)
{
return __pa_nodebug(x);
}
#endif /* CONFIG_DEBUG_VIRTUAL */
#define __pa(x) __phys_addr((unsigned long)(x), false)
#define __pa32(x) __phys_addr((unsigned long)(x), true)
#define __va(x) ((void *)(unsigned long)(x))
#endif /* __DECOMPRESSOR */
#define phys_to_pfn(phys) ((phys) >> PAGE_SHIFT)
#define pfn_to_phys(pfn) ((pfn) << PAGE_SHIFT)
@@ -205,7 +231,7 @@ static inline unsigned long virt_to_pfn(const void *kaddr)
#define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr))
#define page_to_virt(page) pfn_to_virt(page_to_pfn(page))
#define virt_addr_valid(kaddr) pfn_valid(virt_to_pfn(kaddr))
#define virt_addr_valid(kaddr) pfn_valid(phys_to_pfn(__pa_nodebug(kaddr)))
#define VM_DATA_DEFAULT_FLAGS VM_DATA_FLAGS_NON_EXEC