summaryrefslogtreecommitdiff
path: root/arch/s390
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2019-07-20 12:09:52 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2019-07-20 12:09:52 -0700
commitac60602a6d8f6830dee89f4b87ee005f62eb7171 (patch)
treeea8810e0d7abc82755c8db00904015ecbf99a8b4 /arch/s390
parentc6dd78fcb8eefa15dd861889e0f59d301cb5230c (diff)
parent449fa54d6815be8c2c1f68fa9dbbae9384a7c03e (diff)
Merge tag 'dma-mapping-5.3-1' of git://git.infradead.org/users/hch/dma-mapping
Pull dma-mapping fixes from Christoph Hellwig: "Fix various regressions: - force unencrypted dma-coherent buffers if encryption bit can't fit into the dma coherent mask (Tom Lendacky) - avoid limiting request size if swiotlb is not used (me) - fix swiotlb handling in dma_direct_sync_sg_for_cpu/device (Fugang Duan)" * tag 'dma-mapping-5.3-1' of git://git.infradead.org/users/hch/dma-mapping: dma-direct: correct the physical addr in dma_direct_sync_sg_for_cpu/device dma-direct: only limit the mapping size if swiotlb could be used dma-mapping: add a dma_addressing_limited helper dma-direct: Force unencrypted DMA under SME for certain DMA masks
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/Kconfig1
-rw-r--r--arch/s390/mm/init.c7
2 files changed, 7 insertions, 1 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 5d8570ed6cab..a4ad2733eedf 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -189,6 +189,7 @@ config S390
select VIRT_CPU_ACCOUNTING
select ARCH_HAS_SCALED_CPUTIME
select HAVE_NMI
+ select ARCH_HAS_FORCE_DMA_UNENCRYPTED
select SWIOTLB
select GENERIC_ALLOCATOR
diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c
index 4e5bbe328594..20340a03ad90 100644
--- a/arch/s390/mm/init.c
+++ b/arch/s390/mm/init.c
@@ -30,7 +30,7 @@
#include <linux/export.h>
#include <linux/cma.h>
#include <linux/gfp.h>
-#include <linux/dma-mapping.h>
+#include <linux/dma-direct.h>
#include <asm/processor.h>
#include <linux/uaccess.h>
#include <asm/pgtable.h>
@@ -161,6 +161,11 @@ bool sev_active(void)
return is_prot_virt_guest();
}
+bool force_dma_unencrypted(struct device *dev)
+{
+ return sev_active();
+}
+
/* protected virtualization */
static void pv_init(void)
{