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,
x86@kernel•org, hpa@zytor•com, dave.hansen@linux•intel.com,
luto@kernel•org, peterz@infradead•org, konrad.wilk@oracle•com,
boris.ostrovsky@oracle•com, jgross@suse•com,
sstabellini@kernel•org, joro@8bytes•org, will@kernel•org,
davem@davemloft•net, kuba@kernel•org, jejb@linux•ibm.com,
martin.petersen@oracle•com, arnd@arndb•de, hch@lst•de,
m.szyprowski@samsung•com, robin.murphy@arm•com, rppt@kernel•org,
akpm@linux-foundation•org, kirill.shutemov@linux•intel.com,
Tianyu.Lan@microsoft•com, thomas.lendacky@amd•com,
ardb@kernel•org, nramas@linux•microsoft.com, robh@kernel•org,
keescook@chromium•org, rientjes@google•com, pgonda@google•com,
martin.b.radev@gmail•com, hannes@cmpxchg•org, saravanand@fb•com,
krish.sadhukhan@oracle•com, xen-devel@lists•xenproject.org,
tj@kernel•org, 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,
anparri@microsoft•com
Subject: [RFC PATCH V4 01/12] x86/HV: Initialize shared memory boundary in the Isolation VM.
Date: Wed, 7 Jul 2021 11:34:42 -0400 [thread overview]
Message-ID: <20210707153456.3976348-2-ltykernel@gmail.com> (raw)
In-Reply-To: <20210707153456.3976348-1-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 SNP guest.
Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft•com>
---
arch/x86/kernel/cpu/mshyperv.c | 2 ++
include/asm-generic/mshyperv.h | 12 +++++++++++-
2 files changed, 13 insertions(+), 1 deletion(-)
diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
index 10b2a8c10cb6..8aed689db621 100644
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c
@@ -334,6 +334,8 @@ static void __init ms_hyperv_init_platform(void)
if (ms_hyperv.priv_high & 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 3ae56a29594f..2914e27b0429 100644
--- a/include/asm-generic/mshyperv.h
+++ b/include/asm-generic/mshyperv.h
@@ -34,8 +34,18 @@ 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:[~2021-07-07 15:35 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-07 15:34 [RFC PATCH V4 00/12] x86/Hyper-V: Add Hyper-V Isolation VM support Tianyu Lan
2021-07-07 15:34 ` Tianyu Lan [this message]
2021-07-08 7:34 ` [RFC PATCH V4 01/12] x86/HV: Initialize shared memory boundary in the Isolation VM Olaf Hering
2021-07-08 14:40 ` Tianyu Lan
2021-07-07 15:34 ` [RFC PATCH V4 02/12] x86/HV: Add new hvcall guest address host visibility support Tianyu Lan
2021-07-07 15:34 ` [RFC PATCH V4 03/12] HV: Mark vmbus ring buffer visible to host in Isolation VM Tianyu Lan
2021-07-07 15:34 ` [RFC PATCH V4 04/12] HV: Add Write/Read MSR registers via ghcb page Tianyu Lan
2021-07-07 15:34 ` [RFC PATCH V4 05/12] HV: Add ghcb hvcall support for SNP VM Tianyu Lan
2021-07-07 15:34 ` [RFC PATCH V4 06/12] HV/Vmbus: Add SNP support for VMbus channel initiate message Tianyu Lan
2021-07-07 15:34 ` [RFC PATCH V4 07/12] HV/Vmbus: Initialize VMbus ring buffer for Isolation VM Tianyu Lan
2021-07-07 15:34 ` [RFC PATCH V4 08/12] x86/Swiotlb/HV: Add Swiotlb bounce buffer remap function for HV IVM Tianyu Lan
2021-07-07 15:34 ` [RFC PATCH V4 09/12] HV/IOMMU: Enable swiotlb bounce buffer for Isolation VM Tianyu Lan
2021-07-07 15:34 ` [RFC PATCH V4 10/12] HV/Netvsc: Add Isolation VM support for netvsc driver Tianyu Lan
2021-07-07 15:34 ` [RFC PATCH V4 11/12] HV/Storvsc: Add Isolation VM support for storvsc driver Tianyu Lan
2021-07-07 15:34 ` [RFC PATCH V4 12/12] x86/HV: Not set memory decrypted/encrypted during kexec alloc/free page in IVM Tianyu Lan
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