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Date:   Tue, 17 Mar 2020 12:18:23 +0100
From:   Borislav Petkov <bp@suse.de>
To:     lkml <linux-kernel@vger.kernel.org>
Cc:     Benjamin Herrenschmidt <benh@kernel.crashing.org>,
        Paul Mackerras <paulus@samba.org>,
        Michael Ellerman <mpe@ellerman.id.au>,
        Heiko Carstens <heiko.carstens@de.ibm.com>,
        Vasily Gorbik <gor@linux.ibm.com>,
        Christian Borntraeger <borntraeger@de.ibm.com>,
        Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>, x86@kernel.org,
        Dave Hansen <dave.hansen@linux.intel.com>,
        Andy Lutomirski <luto@kernel.org>,
        Peter Zijlstra <peterz@infradead.org>,
        Christoph Hellwig <hch@lst.de>,
        Marek Szyprowski <m.szyprowski@samsung.com>,
        Robin Murphy <robin.murphy@arm.com>,
        linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org,
        linux-s390@vger.kernel.org, iommu@lists.linux-foundation.org,
        Tom Lendacky <thomas.lendacky@amd.com>
Subject: [PATCH] treewide: Rename "unencrypted" to "decrypted"
Message-ID: <20200317111822.GA15609@zn.tnic>
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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.

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