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s390/mm: fix virtual-physical address confusion for swiotlb

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swiotlb passes virtual addresses to set_memory_encrypted() and
set_memory_decrypted(), but uv_remove_shared() and uv_set_shared()
expect physical addresses. This currently works, because virtual
and physical addresses are the same.

Add virt_to_phys() to resolve the virtual-physical confusion.

Reported-by: Marc Hartmayer <mhartmay@linux.ibm.com>
Signed-off-by: Nico Boehr <nrb@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@linux.ibm.com>
Link: https://lore.kernel.org/r/20221107121221.156274-2-nrb@linux.ibm.com
Message-Id: <20221107121221.156274-2-nrb@linux.ibm.com>
Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
This commit is contained in:
Nico Boehr 2022-11-07 13:12:21 +01:00 committed by Janosch Frank
parent 77b5334115
commit 58635d6615
2 changed files with 8 additions and 8 deletions
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4
arch/s390/include/asm/mem_encrypt.h
View File

@ -4,8 +4,8 @@
#ifndef __ASSEMBLY__
int set_memory_encrypted(unsigned long addr, int numpages);
int set_memory_decrypted(unsigned long addr, int numpages);
int set_memory_encrypted(unsigned long vaddr, int numpages);
int set_memory_decrypted(unsigned long vaddr, int numpages);
#endif /* __ASSEMBLY__ */

12
arch/s390/mm/init.c
View File

@ -140,25 +140,25 @@ void mark_rodata_ro(void)
debug_checkwx();
}
int set_memory_encrypted(unsigned long addr, int numpages)
int set_memory_encrypted(unsigned long vaddr, int numpages)
{
int i;
/* make specified pages unshared, (swiotlb, dma_free) */
for (i = 0; i < numpages; ++i) {
uv_remove_shared(addr);
addr += PAGE_SIZE;
uv_remove_shared(virt_to_phys((void *)vaddr));
vaddr += PAGE_SIZE;
}
return 0;
}
int set_memory_decrypted(unsigned long addr, int numpages)
int set_memory_decrypted(unsigned long vaddr, int numpages)
{
int i;
/* make specified pages shared (swiotlb, dma_alloca) */
for (i = 0; i < numpages; ++i) {
uv_set_shared(addr);
addr += PAGE_SIZE;
uv_set_shared(virt_to_phys((void *)vaddr));
vaddr += PAGE_SIZE;
}
return 0;
}