[PATCH] treewide: Rename "unencrypted" to "decrypted"

Borislav Petkov
2020-03-17T11:18:25Z

Hi all,

this hasn't been fully tested yet but it is mechanical rename only so
there shouldn't be any problems (famous last words :-)).

I'll run it through the randconfig bench today and take it through tip if
there are no objections.

Thx.

---

Back then when the whole SME machinery started getting mainlined, it
was agreed that for simplicity, clarity and sanity's sake, the terms
denoting encrypted and not-encrypted memory should be "encrypted" and
"decrypted". And the majority of the code sticks to that convention
except those two. So rename them.

No functional changes.

Signed-off-by: Borislav Petkov <bp@suse.de>
---
arch/powerpc/platforms/pseries/Kconfig | 2 +-
arch/s390/Kconfig | 2 +-
arch/x86/Kconfig | 2 +-
arch/x86/mm/mem_encrypt.c | 4 ++--
include/linux/dma-direct.h | 8 ++++----
kernel/dma/Kconfig | 2 +-
kernel/dma/direct.c | 14 +++++++-------
kernel/dma/mapping.c | 2 +-
8 files changed, 18 insertions(+), 18 deletions(-)

diff --git a/arch/powerpc/platforms/pseries/Kconfig b/arch/powerpc/platforms/pseries/Kconfig
index 24c18362e5ea..a78e2c3e1d92 100644
--- a/arch/powerpc/platforms/pseries/Kconfig
+++ b/arch/powerpc/platforms/pseries/Kconfig
@@ -151,7 +151,7 @@ config PPC_SVM
depends on PPC_PSERIES
select SWIOTLB
select ARCH_HAS_MEM_ENCRYPT
- select ARCH_HAS_FORCE_DMA_UNENCRYPTED
+ select ARCH_HAS_FORCE_DMA_DECRYPTED
help
There are certain POWER platforms which support secure guests using
the Protected Execution Facility, with the help of an Ultravisor
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index 8abe77536d9d..ab1dbb7415b4 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig
@@ -192,7 +192,7 @@ config S390
select VIRT_CPU_ACCOUNTING
select ARCH_HAS_SCALED_CPUTIME
select HAVE_NMI
- select ARCH_HAS_FORCE_DMA_UNENCRYPTED
+ select ARCH_HAS_FORCE_DMA_DECRYPTED
select SWIOTLB
select GENERIC_ALLOCATOR

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index beea77046f9b..2ae904f505e1 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -1525,7 +1525,7 @@ config AMD_MEM_ENCRYPT
depends on X86_64 && CPU_SUP_AMD
select DYNAMIC_PHYSICAL_MASK
select ARCH_USE_MEMREMAP_PROT
- select ARCH_HAS_FORCE_DMA_UNENCRYPTED
+ select ARCH_HAS_FORCE_DMA_DECRYPTED
---help---
Say yes to enable support for the encryption of system memory.
This requires an AMD processor that supports Secure Memory
diff --git a/arch/x86/mm/mem_encrypt.c b/arch/x86/mm/mem_encrypt.c
index a03614bd3e1a..66d09f269e6d 100644
--- a/arch/x86/mm/mem_encrypt.c
+++ b/arch/x86/mm/mem_encrypt.c
@@ -350,8 +350,8 @@ bool sev_active(void)
return sme_me_mask && sev_enabled;
}

-/* Override for DMA direct allocation check - ARCH_HAS_FORCE_DMA_UNENCRYPTED */
-bool force_dma_unencrypted(struct device *dev)
+/* Override for DMA direct allocation check - ARCH_HAS_FORCE_DMA_DECRYPTED */
+bool force_dma_decrypted(struct device *dev)
{
/*
* For SEV, all DMA must be to unencrypted addresses.
diff --git a/include/linux/dma-direct.h b/include/linux/dma-direct.h
index 24b8684aa21d..9f955844e9c7 100644
--- a/include/linux/dma-direct.h
+++ b/include/linux/dma-direct.h
@@ -26,14 +26,14 @@ static inline phys_addr_t __dma_to_phys(struct device *dev, dma_addr_t dev_addr)
}
#endif /* !CONFIG_ARCH_HAS_PHYS_TO_DMA */

-#ifdef CONFIG_ARCH_HAS_FORCE_DMA_UNENCRYPTED
-bool force_dma_unencrypted(struct device *dev);
+#ifdef CONFIG_ARCH_HAS_FORCE_DMA_DECRYPTED
+bool force_dma_decrypted(struct device *dev);
#else
-static inline bool force_dma_unencrypted(struct device *dev)
+static inline bool force_dma_decrypted(struct device *dev)
{
return false;
}
-#endif /* CONFIG_ARCH_HAS_FORCE_DMA_UNENCRYPTED */
+#endif /* CONFIG_ARCH_HAS_FORCE_DMA_DECRYPTED */

/*
* If memory encryption is supported, phys_to_dma will set the memory encryption
diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig
index 4c103a24e380..55c4147bb2b1 100644
--- a/kernel/dma/Kconfig
+++ b/kernel/dma/Kconfig
@@ -51,7 +51,7 @@ config ARCH_HAS_SYNC_DMA_FOR_CPU_ALL
config ARCH_HAS_DMA_PREP_COHERENT
bool

-config ARCH_HAS_FORCE_DMA_UNENCRYPTED
+config ARCH_HAS_FORCE_DMA_DECRYPTED
bool

config DMA_NONCOHERENT_CACHE_SYNC
diff --git a/kernel/dma/direct.c b/kernel/dma/direct.c
index ac7956c38f69..a0576c0ccacd 100644
--- a/kernel/dma/direct.c
+++ b/kernel/dma/direct.c
@@ -26,7 +26,7 @@ unsigned int zone_dma_bits __ro_after_init = 24;
static inline dma_addr_t phys_to_dma_direct(struct device *dev,
phys_addr_t phys)
{
- if (force_dma_unencrypted(dev))
+ if (force_dma_decrypted(dev))
return __phys_to_dma(dev, phys);
return phys_to_dma(dev, phys);
}
@@ -49,7 +49,7 @@ static gfp_t __dma_direct_optimal_gfp_mask(struct device *dev, u64 dma_mask,
{
u64 dma_limit = min_not_zero(dma_mask, dev->bus_dma_limit);

- if (force_dma_unencrypted(dev))
+ if (force_dma_decrypted(dev))
*phys_limit = __dma_to_phys(dev, dma_limit);
else
*phys_limit = dma_to_phys(dev, dma_limit);
@@ -138,7 +138,7 @@ void *dma_direct_alloc_pages(struct device *dev, size_t size,
return NULL;

if ((attrs & DMA_ATTR_NO_KERNEL_MAPPING) &&
- !force_dma_unencrypted(dev)) {
+ !force_dma_decrypted(dev)) {
/* remove any dirty cache lines on the kernel alias */
if (!PageHighMem(page))
arch_dma_prep_coherent(page, size);
@@ -179,7 +179,7 @@ void *dma_direct_alloc_pages(struct device *dev, size_t size,
}

ret = page_address(page);
- if (force_dma_unencrypted(dev))
+ if (force_dma_decrypted(dev))
set_memory_decrypted((unsigned long)ret, 1 << get_order(size));

memset(ret, 0, size);
@@ -190,7 +190,7 @@ void *dma_direct_alloc_pages(struct device *dev, size_t size,
ret = uncached_kernel_address(ret);
}
done:
- if (force_dma_unencrypted(dev))
+ if (force_dma_decrypted(dev))
*dma_handle = __phys_to_dma(dev, page_to_phys(page));
else
*dma_handle = phys_to_dma(dev, page_to_phys(page));
@@ -203,7 +203,7 @@ void dma_direct_free_pages(struct device *dev, size_t size, void *cpu_addr,
unsigned int page_order = get_order(size);

if ((attrs & DMA_ATTR_NO_KERNEL_MAPPING) &&
- !force_dma_unencrypted(dev)) {
+ !force_dma_decrypted(dev)) {
/* cpu_addr is a struct page cookie, not a kernel address */
dma_free_contiguous(dev, cpu_addr, size);
return;
@@ -213,7 +213,7 @@ void dma_direct_free_pages(struct device *dev, size_t size, void *cpu_addr,
dma_free_from_pool(cpu_addr, PAGE_ALIGN(size)))
return;

- if (force_dma_unencrypted(dev))
+ if (force_dma_decrypted(dev))
set_memory_encrypted((unsigned long)cpu_addr, 1 << page_order);

if (IS_ENABLED(CONFIG_DMA_REMAP) && is_vmalloc_addr(cpu_addr))
diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c
index 98e3d873792e..dbd0605a39c5 100644
--- a/kernel/dma/mapping.c
+++ b/kernel/dma/mapping.c
@@ -154,7 +154,7 @@ EXPORT_SYMBOL(dma_get_sgtable_attrs);
*/
pgprot_t dma_pgprot(struct device *dev, pgprot_t prot, unsigned long attrs)
{
- if (force_dma_unencrypted(dev))
+ if (force_dma_decrypted(dev))
prot = pgprot_decrypted(prot);
if (dev_is_dma_coherent(dev) ||
(IS_ENABLED(CONFIG_DMA_NONCOHERENT_CACHE_SYNC) &&
--
2.21.0

--
Regards/Gruss,
Boris.