From: Borislav Petkov <bp@alien8.de>
To: LKML <linux-kernel@vger.kernel.org>
Cc: Michael Ellerman <mpe@ellerman.id.au>,
Andi Kleen <ak@linux.intel.com>,
Andy Lutomirski <luto@kernel.org>,
Ard Biesheuvel <ardb@kernel.org>, Baoquan He <bhe@redhat.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Christian Borntraeger <borntraeger@de.ibm.com>,
Daniel Vetter <daniel@ffwll.ch>, Dave Young <dyoung@redhat.com>,
David Airlie <airlied@linux.ie>,
Heiko Carstens <hca@linux.ibm.com>,
Joerg Roedel <joro@8bytes.org>,
"Kirill A. Shutemov" <kirill@shutemov.name>,
"Kuppuswamy,
Sathyanarayanan" <sathyanarayanan.kuppuswamy@linux.intel.com>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
Paul Mackerras <paulus@samba.org>,
Tom Lendacky <thomas.lendacky@amd.com>,
Thomas Zimmermann <tzimmermann@suse.de>,
Vasily Gorbik <gor@linux.ibm.com>,
VMware Graphics <linux-graphics-maintainer@vmware.com>,
Will Deacon <will@kernel.org>,
Christoph Hellwig <hch@infradead.org>,
x86@kernel.org, linuxppc-dev@lists.ozlabs.org,
linux-s390@vger.kernel.org, iommu@lists.linux-foundation.org,
kvm@vger.kernel.org, linux-efi@vger.kernel.org,
platform-driver-x86@vger.kernel.org,
amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org,
kexec@lists.infradead.org
Subject: [PATCH 4/8] powerpc/pseries/svm: Add a powerpc version of cc_platform_has()
Date: Tue, 28 Sep 2021 21:10:05 +0200 [thread overview]
Message-ID: <20210928191009.32551-5-bp@alien8.de> (raw)
In-Reply-To: <20210928191009.32551-1-bp@alien8.de>
From: Tom Lendacky <thomas.lendacky@amd.com>
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>
---
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 5e037df2a3a1..2e57391e0778 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 4cda0ef87be0..41d8aee98da4 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 000000000000..e8021af83a19
--- /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);
--
2.29.2
next prev parent reply other threads:[~2021-09-28 19:10 UTC|newest]
Thread overview: 15+ 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
2021-09-28 19:10 ` [PATCH 2/8] arch/cc: Introduce a function to check for confidential computing features Borislav Petkov
2021-09-28 19:10 ` [PATCH 3/8] x86/sev: Add an x86 version of cc_platform_has() Borislav Petkov
2021-09-28 19:10 ` Borislav Petkov [this message]
2021-09-28 19:10 ` [PATCH 5/8] x86/sme: Replace occurrences of sme_active() with cc_platform_has() Borislav Petkov
2021-09-28 19:10 ` [PATCH 6/8] x86/sev: Replace occurrences of sev_active() " Borislav Petkov
2021-09-28 19:10 ` [PATCH 7/8] x86/sev: Replace occurrences of sev_es_active() " Borislav Petkov
2021-09-28 19:10 ` [PATCH 8/8] treewide: Replace the use of mem_encrypt_active() " Borislav Petkov
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20210928191009.32551-5-bp@alien8.de \
--to=bp@alien8.de \
--cc=airlied@linux.ie \
--cc=ak@linux.intel.com \
--cc=amd-gfx@lists.freedesktop.org \
--cc=ardb@kernel.org \
--cc=benh@kernel.crashing.org \
--cc=bhe@redhat.com \
--cc=borntraeger@de.ibm.com \
--cc=daniel@ffwll.ch \
--cc=dri-devel@lists.freedesktop.org \
--cc=dyoung@redhat.com \
--cc=gor@linux.ibm.com \
--cc=hca@linux.ibm.com \
--cc=hch@infradead.org \
--cc=iommu@lists.linux-foundation.org \
--cc=joro@8bytes.org \
--cc=kexec@lists.infradead.org \
--cc=kirill@shutemov.name \
--cc=kvm@vger.kernel.org \
--cc=linux-efi@vger.kernel.org \
--cc=linux-graphics-maintainer@vmware.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-s390@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=luto@kernel.org \
--cc=maarten.lankhorst@linux.intel.com \
--cc=mpe@ellerman.id.au \
--cc=mripard@kernel.org \
--cc=paulus@samba.org \
--cc=platform-driver-x86@vger.kernel.org \
--cc=sathyanarayanan.kuppuswamy@linux.intel.com \
--cc=thomas.lendacky@amd.com \
--cc=tzimmermann@suse.de \
--cc=will@kernel.org \
--cc=x86@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).