From: Tianyu Lan <ltykernel@gmail.com>
To: kys@microsoft.com, haiyangz@microsoft.com,
sthemmin@microsoft.com, wei.liu@kernel.org, tglx@linutronix.de,
mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com,
arnd@arndb.de
Cc: Tianyu Lan <Tianyu.Lan@microsoft.com>,
linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-arch@vger.kernel.org, vkuznets@redhat.com,
thomas.lendacky@amd.com, brijesh.singh@amd.com,
sunilmut@microsoft.com
Subject: [RFC V2 PATCH 2/12] x86/HV: Initialize shared memory boundary in Isolation VM
Date: Tue, 13 Apr 2021 11:22:07 -0400 [thread overview]
Message-ID: <20210413152217.3386288-3-ltykernel@gmail.com> (raw)
In-Reply-To: <20210413152217.3386288-1-ltykernel@gmail.com>
From: Tianyu Lan <Tianyu.Lan@microsoft.com>
Hyper-V exposes shared memory boundary via cpuid HYPERV_
CPUID_ISOLATION_CONFIG and store it in the shared_gpa_
boundary of ms_hyperv struct. This prepares to share
memory with host for AMD SEV SNP guest.
Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com>
---
arch/x86/kernel/cpu/mshyperv.c | 2 ++
include/asm-generic/mshyperv.h | 13 ++++++++++++-
2 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
index e88bc296afca..aeafd4017c89 100644
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c
@@ -328,6 +328,8 @@ static void __init ms_hyperv_init_platform(void)
if (ms_hyperv.features_b & HV_ISOLATION) {
ms_hyperv.isolation_config_a = cpuid_eax(HYPERV_CPUID_ISOLATION_CONFIG);
ms_hyperv.isolation_config_b = cpuid_ebx(HYPERV_CPUID_ISOLATION_CONFIG);
+ ms_hyperv.shared_gpa_boundary =
+ (u64)1 << ms_hyperv.shared_gpa_boundary_bits;
pr_info("Hyper-V: Isolation Config: Group A 0x%x, Group B 0x%x\n",
ms_hyperv.isolation_config_a, ms_hyperv.isolation_config_b);
diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h
index c6f4c5c20fb8..b73e201abc70 100644
--- a/include/asm-generic/mshyperv.h
+++ b/include/asm-generic/mshyperv.h
@@ -34,8 +34,19 @@ struct ms_hyperv_info {
u32 max_vp_index;
u32 max_lp_index;
u32 isolation_config_a;
- u32 isolation_config_b;
+ union
+ {
+ u32 isolation_config_b;
+ struct {
+ u32 cvm_type : 4;
+ u32 Reserved11 : 1;
+ u32 shared_gpa_boundary_active : 1;
+ u32 shared_gpa_boundary_bits : 6;
+ u32 Reserved12 : 20;
+ };
+ };
void __percpu **ghcb_base;
+ u64 shared_gpa_boundary;
};
extern struct ms_hyperv_info ms_hyperv;
--
2.25.1
next prev parent reply other threads:[~2021-04-13 15:22 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-13 15:22 [RFC V2 PATCH 00/12] x86/Hyper-V: Add Hyper-V Isolation VM support Tianyu Lan
2021-04-13 15:22 ` [RFC V2 PATCH 1/12] x86/HV: Initialize GHCB page in Isolation VM Tianyu Lan
2021-04-13 15:22 ` Tianyu Lan [this message]
2021-04-13 15:22 ` [RFC V2 PATCH 3/12] x86/Hyper-V: Add new hvcall guest address host visibility support Tianyu Lan
2021-04-13 15:22 ` [RFC V2 PATCH 4/12] HV: Add Write/Read MSR registers via ghcb Tianyu Lan
2021-04-13 15:22 ` [RFC V2 PATCH 5/12] HV: Add ghcb hvcall support for SNP VM Tianyu Lan
2021-04-13 15:22 ` [RFC V2 PATCH 6/12] HV/Vmbus: Add SNP support for VMbus channel initiate message Tianyu Lan
2021-04-13 15:22 ` [RFC V2 PATCH 7/12] HV/Vmbus: Initialize VMbus ring buffer for Isolation VM Tianyu Lan
2021-04-13 15:22 ` [RFC V2 PATCH 8/12] UIO/Hyper-V: Not load UIO HV driver in the isolation VM Tianyu Lan
2021-04-13 15:59 ` Greg KH
2021-04-13 16:00 ` Greg KH
2021-04-14 15:20 ` Tianyu Lan
2021-04-14 15:36 ` Greg KH
2021-04-13 15:22 ` [RFC V2 PATCH 9/12] swiotlb: Add bounce buffer remap address setting function Tianyu Lan
2021-04-14 6:43 ` Christoph Hellwig
2021-04-14 14:12 ` Tianyu Lan
2021-04-13 15:22 ` [RFC V2 PATCH 10/12] HV/IOMMU: Add Hyper-V dma ops support Tianyu Lan
2021-04-13 15:22 ` [RFC V2 PATCH 11/12] HV/Netvsc: Add Isolation VM support for netvsc driver Tianyu Lan
2021-04-18 9:53 ` Leon Romanovsky
2021-04-13 15:22 ` [RFC V2 PATCH 12/12] HV/Storvsc: Add Isolation VM support for storvsc driver Tianyu Lan
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