From: Tianyu Lan <ltykernel@gmail•com>
To: kys@microsoft•com, haiyangz@microsoft•com,
sthemmin@microsoft•com, wei.liu@kernel•org, decui@microsoft•com,
tglx@linutronix•de, mingo@redhat•com, bp@alien8•de,
dave.hansen@linux•intel.com, x86@kernel•org, hpa@zytor•com,
davem@davemloft•net, kuba@kernel•org, jejb@linux•ibm.com,
martin.petersen@oracle•com, arnd@arndb•de, hch@infradead•org,
m.szyprowski@samsung•com, robin.murphy@arm•com,
thomas.lendacky@amd•com, Tianyu.Lan@microsoft•com,
michael.h.kelley@microsoft•com
Cc: iommu@lists•linux-foundation.org, linux-arch@vger•kernel.org,
linux-hyperv@vger•kernel.org, linux-kernel@vger•kernel.org,
linux-scsi@vger•kernel.org, netdev@vger•kernel.org,
vkuznets@redhat•com, brijesh.singh@amd•com,
konrad.wilk@oracle•com, hch@lst•de, joro@8bytes•org,
parri.andrea@gmail•com, dave.hansen@intel•com
Subject: [PATCH V7 2/5] x86/hyper-v: Add hyperv Isolation VM check in the cc_platform_has()
Date: Mon, 13 Dec 2021 02:14:03 -0500 [thread overview]
Message-ID: <20211213071407.314309-3-ltykernel@gmail.com> (raw)
In-Reply-To: <20211213071407.314309-1-ltykernel@gmail.com>
From: Tianyu Lan <Tianyu.Lan@microsoft•com>
Hyper-V provides Isolation VM for confidential computing support and
guest memory is encrypted in it. Places checking cc_platform_has()
with GUEST_MEM_ENCRYPT attr should return "True" in Isolation vm. e.g,
swiotlb bounce buffer size needs to adjust according to memory size
in the sev_setup_arch(). Add GUEST_MEM_ENCRYPT check for Hyper-V Isolation
VM.
Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft•com>
---
Change since v6:
* Change the order in the cc_platform_has() and check sev first.
Change since v3:
* Change code style of checking GUEST_MEM attribute in the
hyperv_cc_platform_has().
---
arch/x86/kernel/cc_platform.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/arch/x86/kernel/cc_platform.c b/arch/x86/kernel/cc_platform.c
index 03bb2f343ddb..6cb3a675e686 100644
--- a/arch/x86/kernel/cc_platform.c
+++ b/arch/x86/kernel/cc_platform.c
@@ -11,6 +11,7 @@
#include <linux/cc_platform.h>
#include <linux/mem_encrypt.h>
+#include <asm/mshyperv.h>
#include <asm/processor.h>
static bool __maybe_unused intel_cc_platform_has(enum cc_attr attr)
@@ -58,12 +59,19 @@ static bool amd_cc_platform_has(enum cc_attr attr)
#endif
}
+static bool hyperv_cc_platform_has(enum cc_attr attr)
+{
+ return attr == CC_ATTR_GUEST_MEM_ENCRYPT;
+}
bool cc_platform_has(enum cc_attr attr)
{
if (sme_me_mask)
return amd_cc_platform_has(attr);
+ if (hv_is_isolation_supported())
+ return hyperv_cc_platform_has(attr);
+
return false;
}
EXPORT_SYMBOL_GPL(cc_platform_has);
--
2.25.1
next prev parent reply other threads:[~2021-12-13 7:14 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-13 7:14 [PATCH V7 0/5] x86/Hyper-V: Add Hyper-V Isolation VM support(Second part) Tianyu Lan
2021-12-13 7:14 ` [PATCH V7 1/5] swiotlb: Add swiotlb bounce buffer remap function for HV IVM Tianyu Lan
2021-12-13 16:45 ` Dave Hansen
2021-12-14 4:36 ` Tianyu Lan
2021-12-14 18:40 ` Dave Hansen
2021-12-14 22:23 ` Tom Lendacky
2021-12-14 22:40 ` Dave Hansen
2021-12-15 5:00 ` Tianyu Lan
2021-12-16 11:05 ` Wei Liu
2021-12-13 7:14 ` Tianyu Lan [this message]
2021-12-14 15:33 ` [PATCH V7 2/5] x86/hyper-v: Add hyperv Isolation VM check in the cc_platform_has() Wei Liu
2021-12-14 16:05 ` Borislav Petkov
2021-12-14 16:10 ` Wei Liu
2021-12-13 7:14 ` [PATCH V7 3/5] hyper-v: Enable swiotlb bounce buffer for Isolation VM Tianyu Lan
2021-12-13 7:14 ` [PATCH V7 4/5] scsi: storvsc: Add Isolation VM support for storvsc driver Tianyu Lan
2021-12-15 19:19 ` Long Li
2022-02-03 23:53 ` Jakub Kicinski
2022-02-04 2:55 ` Jakub Kicinski
2021-12-13 7:14 ` [PATCH V7 5/5] net: netvsc: Add Isolation VM support for netvsc driver Tianyu Lan
2021-12-13 16:56 ` Haiyang Zhang
2021-12-14 18:35 ` [PATCH V7 0/5] x86/Hyper-V: Add Hyper-V Isolation VM support(Second part) Michael Kelley (LINUX)
2021-12-17 18:02 ` Wei Liu
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=20211213071407.314309-3-ltykernel@gmail.com \
--to=ltykernel@gmail$(echo .)com \
--cc=Tianyu.Lan@microsoft$(echo .)com \
--cc=arnd@arndb$(echo .)de \
--cc=bp@alien8$(echo .)de \
--cc=brijesh.singh@amd$(echo .)com \
--cc=dave.hansen@intel$(echo .)com \
--cc=dave.hansen@linux$(echo .)intel.com \
--cc=davem@davemloft$(echo .)net \
--cc=decui@microsoft$(echo .)com \
--cc=haiyangz@microsoft$(echo .)com \
--cc=hch@infradead$(echo .)org \
--cc=hch@lst$(echo .)de \
--cc=hpa@zytor$(echo .)com \
--cc=iommu@lists$(echo .)linux-foundation.org \
--cc=jejb@linux$(echo .)ibm.com \
--cc=joro@8bytes$(echo .)org \
--cc=konrad.wilk@oracle$(echo .)com \
--cc=kuba@kernel$(echo .)org \
--cc=kys@microsoft$(echo .)com \
--cc=linux-arch@vger$(echo .)kernel.org \
--cc=linux-hyperv@vger$(echo .)kernel.org \
--cc=linux-kernel@vger$(echo .)kernel.org \
--cc=linux-scsi@vger$(echo .)kernel.org \
--cc=m.szyprowski@samsung$(echo .)com \
--cc=martin.petersen@oracle$(echo .)com \
--cc=michael.h.kelley@microsoft$(echo .)com \
--cc=mingo@redhat$(echo .)com \
--cc=netdev@vger$(echo .)kernel.org \
--cc=parri.andrea@gmail$(echo .)com \
--cc=robin.murphy@arm$(echo .)com \
--cc=sthemmin@microsoft$(echo .)com \
--cc=tglx@linutronix$(echo .)de \
--cc=thomas.lendacky@amd$(echo .)com \
--cc=vkuznets@redhat$(echo .)com \
--cc=wei.liu@kernel$(echo .)org \
--cc=x86@kernel$(echo .)org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
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