From: Tianyu Lan <ltykernel@gmail.com>
To: tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com,
thomas.lendacky@amd.com, Tianyu.Lan@microsoft.com,
michael.h.kelley@microsoft.com, kys@microsoft.com
Cc: linux-kernel@vger.kernel.org, vkuznets@redhat.com,
brijesh.singh@amd.com, konrad.wilk@oracle.com, hch@lst.de,
wei.liu@kernel.org, robin.murphy@arm.com, joro@8bytes.org,
parri.andrea@gmail.com, dave.hansen@intel.com,
linux-hyperv@vger.kernel.org
Subject: [PATCH V6.1] x86/hyper-v: Add hyperv Isolation VM check in the cc_platform_has()
Date: Wed, 8 Dec 2021 09:52:28 -0500 [thread overview]
Message-ID: <20211208145228.42048-1-ltykernel@gmail.com> (raw)
In-Reply-To: <20211207075602.2452-3-ltykernel@gmail.com>
From: Tianyu Lan <Tianyu.Lan@microsoft.com>
Hyper-V provides Isolation VM which encrypt guest memory. In
isolation VM, swiotlb bounce buffer size needs to adjust
according to memory size in the sev_setup_arch(). Add GUEST_MEM_
ENCRYPT check in the 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:[~2021-12-08 14:52 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-07 7:55 [PATCH V6 0/5] x86/Hyper-V: Add Hyper-V Isolation VM support(Second part) Tianyu Lan
2021-12-07 7:55 ` [PATCH V6 1/5] swiotlb: Add swiotlb bounce buffer remap function for HV IVM Tianyu Lan
2021-12-07 7:55 ` [PATCH V6 2/5] x86/hyper-v: Add hyperv Isolation VM check in the cc_platform_has() Tianyu Lan
2021-12-07 9:47 ` Borislav Petkov
2021-12-07 11:18 ` Tianyu Lan
2021-12-08 14:52 ` Tianyu Lan [this message]
2021-12-08 15:12 ` [PATCH V6.1] " Tianyu Lan
2021-12-09 20:38 ` [PATCH V6 2/5] " Michael Kelley (LINUX)
2021-12-10 11:26 ` Tianyu Lan
2021-12-07 7:55 ` [PATCH V6 3/5] hyper-v: Enable swiotlb bounce buffer for Isolation VM Tianyu Lan
2021-12-09 20:09 ` Michael Kelley (LINUX)
2021-12-10 13:25 ` Tianyu Lan
2021-12-10 14:01 ` Tianyu Lan
2021-12-07 7:56 ` [PATCH V6 4/5] scsi: storvsc: Add Isolation VM support for storvsc driver Tianyu Lan
2021-12-09 8:00 ` Long Li
2021-12-09 11:17 ` Tianyu Lan
2021-12-07 7:56 ` [PATCH V6 5/5] net: netvsc: Add Isolation VM support for netvsc driver Tianyu Lan
2021-12-08 20:14 ` Haiyang Zhang
2021-12-09 8:08 ` Tianyu Lan
2021-12-09 19:54 ` Michael Kelley (LINUX)
2021-12-09 20:40 ` Haiyang Zhang
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