From: "tip-bot2 for Tom Lendacky" <tip-bot2@linutronix.de>
To: linux-tip-commits@vger.kernel.org
Cc: Tom Lendacky <thomas.lendacky@amd.com>,
Borislav Petkov <bp@suse.de>,
Michael Ellerman <mpe@ellerman.id.au>,
x86@kernel.org, linux-kernel@vger.kernel.org
Subject: [tip: x86/cc] powerpc/pseries/svm: Add a powerpc version of cc_platform_has()
Date: Mon, 04 Oct 2021 11:41:28 -0000 [thread overview]
Message-ID: <163334768869.25758.17411401562140367695.tip-bot2@tip-bot2> (raw)
In-Reply-To: <20210928191009.32551-5-bp@alien8.de>
The following commit has been merged into the x86/cc branch of tip:
Commit-ID: bfebd37e99dece9c83a373cf9f35def440fdd5df
Gitweb: https://git.kernel.org/tip/bfebd37e99dece9c83a373cf9f35def440fdd5df
Author: Tom Lendacky <thomas.lendacky@amd.com>
AuthorDate: Wed, 08 Sep 2021 17:58:35 -05:00
Committer: Borislav Petkov <bp@suse.de>
CommitterDate: Mon, 04 Oct 2021 11:46:33 +02:00
powerpc/pseries/svm: Add a powerpc version of cc_platform_has()
Introduce a powerpc version of the cc_platform_has() function. This will
be used to replace the powerpc mem_encrypt_active() implementation, so
the implementation will initially only support the CC_ATTR_MEM_ENCRYPT
attribute.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lkml.kernel.org/r/20210928191009.32551-5-bp@alien8.de
---
arch/powerpc/platforms/pseries/Kconfig | 1 +-
arch/powerpc/platforms/pseries/Makefile | 2 +-
arch/powerpc/platforms/pseries/cc_platform.c | 26 +++++++++++++++++++-
3 files changed, 29 insertions(+)
create mode 100644 arch/powerpc/platforms/pseries/cc_platform.c
diff --git a/arch/powerpc/platforms/pseries/Kconfig b/arch/powerpc/platforms/pseries/Kconfig
index 5e037df..2e57391 100644
--- a/arch/powerpc/platforms/pseries/Kconfig
+++ b/arch/powerpc/platforms/pseries/Kconfig
@@ -159,6 +159,7 @@ config PPC_SVM
select SWIOTLB
select ARCH_HAS_MEM_ENCRYPT
select ARCH_HAS_FORCE_DMA_UNENCRYPTED
+ select ARCH_HAS_CC_PLATFORM
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/powerpc/platforms/pseries/Makefile b/arch/powerpc/platforms/pseries/Makefile
index 4cda0ef..41d8aee 100644
--- a/arch/powerpc/platforms/pseries/Makefile
+++ b/arch/powerpc/platforms/pseries/Makefile
@@ -31,3 +31,5 @@ obj-$(CONFIG_FA_DUMP) += rtas-fadump.o
obj-$(CONFIG_SUSPEND) += suspend.o
obj-$(CONFIG_PPC_VAS) += vas.o
+
+obj-$(CONFIG_ARCH_HAS_CC_PLATFORM) += cc_platform.o
diff --git a/arch/powerpc/platforms/pseries/cc_platform.c b/arch/powerpc/platforms/pseries/cc_platform.c
new file mode 100644
index 0000000..e8021af
--- /dev/null
+++ b/arch/powerpc/platforms/pseries/cc_platform.c
@@ -0,0 +1,26 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Confidential Computing Platform Capability checks
+ *
+ * Copyright (C) 2021 Advanced Micro Devices, Inc.
+ *
+ * Author: Tom Lendacky <thomas.lendacky@amd.com>
+ */
+
+#include <linux/export.h>
+#include <linux/cc_platform.h>
+
+#include <asm/machdep.h>
+#include <asm/svm.h>
+
+bool cc_platform_has(enum cc_attr attr)
+{
+ switch (attr) {
+ case CC_ATTR_MEM_ENCRYPT:
+ return is_secure_guest();
+
+ default:
+ return false;
+ }
+}
+EXPORT_SYMBOL_GPL(cc_platform_has);
next prev parent reply other threads:[~2021-10-04 11:41 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-28 19:10 [PATCH v4 0/8] Implement generic cc_platform_has() helper function Borislav Petkov
2021-09-28 19:10 ` [PATCH 1/8] x86/ioremap: Selectively build arch override encryption functions Borislav Petkov
2021-10-04 11:41 ` [tip: x86/cc] " tip-bot2 for Tom Lendacky
2021-09-28 19:10 ` [PATCH 2/8] arch/cc: Introduce a function to check for confidential computing features Borislav Petkov
2021-10-04 11:41 ` [tip: x86/cc] " tip-bot2 for Tom Lendacky
2021-09-28 19:10 ` [PATCH 3/8] x86/sev: Add an x86 version of cc_platform_has() Borislav Petkov
2021-10-04 11:41 ` [tip: x86/cc] " tip-bot2 for Tom Lendacky
2021-09-28 19:10 ` [PATCH 4/8] powerpc/pseries/svm: Add a powerpc " Borislav Petkov
2021-10-04 11:41 ` tip-bot2 for Tom Lendacky [this message]
2021-09-28 19:10 ` [PATCH 5/8] x86/sme: Replace occurrences of sme_active() with cc_platform_has() Borislav Petkov
2021-10-04 11:41 ` [tip: x86/cc] " tip-bot2 for Tom Lendacky
2021-09-28 19:10 ` [PATCH 6/8] x86/sev: Replace occurrences of sev_active() " Borislav Petkov
2021-10-04 11:41 ` [tip: x86/cc] " tip-bot2 for Tom Lendacky
2021-09-28 19:10 ` [PATCH 7/8] x86/sev: Replace occurrences of sev_es_active() " Borislav Petkov
2021-10-04 11:41 ` [tip: x86/cc] " tip-bot2 for Tom Lendacky
2021-09-28 19:10 ` [PATCH 8/8] treewide: Replace the use of mem_encrypt_active() " Borislav Petkov
2021-10-04 11:41 ` [tip: x86/cc] " tip-bot2 for Tom Lendacky
2021-09-28 19:19 ` [PATCH v4 0/8] Implement generic cc_platform_has() helper function Kuppuswamy, Sathyanarayanan
2021-09-28 20:31 ` Borislav Petkov
2021-09-28 20:48 ` Kuppuswamy, Sathyanarayanan
2021-09-28 20:58 ` Borislav Petkov
2021-09-28 21:01 ` Kuppuswamy, Sathyanarayanan
2021-09-28 21:40 ` Borislav Petkov
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