From: Brijesh Singh <brijesh.singh@amd.com>
To: x86@kernel.org, linux-kernel@vger.kernel.org,
kvm@vger.kernel.org, linux-coco@lists.linux.dev,
linux-mm@kvack.org, linux-crypto@vger.kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Joerg Roedel <jroedel@suse.de>,
Tom Lendacky <thomas.lendacky@amd.com>,
"H. Peter Anvin" <hpa@zytor.com>,
Ard Biesheuvel <ardb@kernel.org>,
Paolo Bonzini <pbonzini@redhat.com>,
Sean Christopherson <seanjc@google.com>,
Vitaly Kuznetsov <vkuznets@redhat.com>,
Wanpeng Li <wanpengli@tencent.com>,
Jim Mattson <jmattson@google.com>,
Andy Lutomirski <luto@kernel.org>,
Dave Hansen <dave.hansen@linux.intel.com>,
Sergio Lopez <slp@redhat.com>, Peter Gonda <pgonda@google.com>,
Peter Zijlstra <peterz@infradead.org>,
Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>,
David Rientjes <rientjes@google.com>,
tony.luck@intel.com, npmccallum@redhat.com,
Borislav Petkov <bp@suse.de>,
Brijesh Singh <brijesh.singh@amd.com>
Subject: [PATCH Part2 RFC v3 19/37] KVM: SVM: Add KVM_SNP_INIT command
Date: Wed, 2 Jun 2021 09:10:39 -0500 [thread overview]
Message-ID: <20210602141057.27107-20-brijesh.singh@amd.com> (raw)
In-Reply-To: <20210602141057.27107-1-brijesh.singh@amd.com>
The KVM_SNP_INIT command is used by the hypervisor to initialize the
SEV-SNP platform context. In a typical workflow, this command should be the
first command issued. When creating SEV-SNP guest, the VMM must use this
command instead of the KVM_SEV_INIT or KVM_SEV_ES_INIT.
Signed-off-by: Brijesh Singh <brijesh.singh@amd.com>
---
arch/x86/include/asm/svm.h | 2 ++
arch/x86/kvm/svm/sev.c | 18 ++++++++++++++++--
include/uapi/linux/kvm.h | 3 +++
3 files changed, 21 insertions(+), 2 deletions(-)
diff --git a/arch/x86/include/asm/svm.h b/arch/x86/include/asm/svm.h
index b6f358d6b975..65407b6d35a0 100644
--- a/arch/x86/include/asm/svm.h
+++ b/arch/x86/include/asm/svm.h
@@ -212,6 +212,8 @@ struct __attribute__ ((__packed__)) vmcb_control_area {
#define SVM_NESTED_CTL_SEV_ENABLE BIT(1)
#define SVM_NESTED_CTL_SEV_ES_ENABLE BIT(2)
+#define SVM_SEV_FEATURES_SNP_ACTIVE BIT(0)
+
struct vmcb_seg {
u16 selector;
u16 attrib;
diff --git a/arch/x86/kvm/svm/sev.c b/arch/x86/kvm/svm/sev.c
index abca2b9dee83..0cd0078baf75 100644
--- a/arch/x86/kvm/svm/sev.c
+++ b/arch/x86/kvm/svm/sev.c
@@ -230,8 +230,9 @@ static void sev_unbind_asid(struct kvm *kvm, unsigned int handle)
static int sev_guest_init(struct kvm *kvm, struct kvm_sev_cmd *argp)
{
+ bool es_active = (argp->id == KVM_SEV_ES_INIT || argp->id == KVM_SEV_SNP_INIT);
struct kvm_sev_info *sev = &to_kvm_svm(kvm)->sev_info;
- bool es_active = argp->id == KVM_SEV_ES_INIT;
+ bool snp_active = argp->id == KVM_SEV_SNP_INIT;
int asid, ret;
if (kvm->created_vcpus)
@@ -242,12 +243,16 @@ static int sev_guest_init(struct kvm *kvm, struct kvm_sev_cmd *argp)
return ret;
sev->es_active = es_active;
+ sev->snp_active = snp_active;
asid = sev_asid_new(sev);
if (asid < 0)
goto e_no_asid;
sev->asid = asid;
- ret = sev_platform_init(&argp->error);
+ if (snp_active)
+ ret = sev_snp_init(&argp->error);
+ else
+ ret = sev_platform_init(&argp->error);
if (ret)
goto e_free;
@@ -591,6 +596,9 @@ static int sev_es_sync_vmsa(struct vcpu_svm *svm)
save->pkru = svm->vcpu.arch.pkru;
save->xss = svm->vcpu.arch.ia32_xss;
+ if (sev_snp_guest(svm->vcpu.kvm))
+ save->sev_features |= SVM_SEV_FEATURES_SNP_ACTIVE;
+
return 0;
}
@@ -1523,6 +1531,12 @@ int svm_mem_enc_op(struct kvm *kvm, void __user *argp)
}
switch (sev_cmd.id) {
+ case KVM_SEV_SNP_INIT:
+ if (!sev_snp_enabled) {
+ r = -ENOTTY;
+ goto out;
+ }
+ fallthrough;
case KVM_SEV_ES_INIT:
if (!sev_es_enabled) {
r = -ENOTTY;
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 3fd9a7e9d90c..f3a86d3a8f04 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -1678,6 +1678,9 @@ enum sev_cmd_id {
/* Guest Migration Extension */
KVM_SEV_SEND_CANCEL,
+ /* SNP specific commands */
+ KVM_SEV_SNP_INIT = 255,
+
KVM_SEV_NR_MAX,
};
--
2.17.1
next prev parent reply other threads:[~2021-06-02 14:16 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-02 14:10 [PATCH Part2 RFC v3 00/37] Add AMD Secure Nested Paging (SEV-SNP) Hypervisor Support Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 01/37] KVM: SVM: Add support to handle AP reset MSR protocol Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 02/37] KVM: SVM: Provide the Hypervisor Feature support VMGEXIT Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 03/37] x86/cpufeatures: Add SEV-SNP CPU feature Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 04/37] x86/sev: Add the host SEV-SNP initialization support Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 05/37] x86/sev: Add RMP entry lookup helpers Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 06/37] x86/sev: Add helper functions for RMPUPDATE and PSMASH instruction Brijesh Singh
2021-06-10 13:03 ` Dr. David Alan Gilbert
2021-06-02 14:10 ` [PATCH Part2 RFC v3 07/37] x86/sev: Split the physmap when adding the page in RMP table Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 08/37] x86/traps: Define RMP violation #PF error code Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 09/37] x86/fault: Add support to dump RMP entry on fault Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 10/37] x86/fault: Add support to handle the RMP fault for user address Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 11/37] crypto:ccp: Define the SEV-SNP commands Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 12/37] crypto: ccp: Add support to initialize the AMD-SP for SEV-SNP Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 13/37] crypto: ccp: Shutdown SNP firmware on kexec Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 14/37] crypto:ccp: Provide APIs to issue SEV-SNP commands Brijesh Singh
2021-06-15 11:23 ` Dr. David Alan Gilbert
2021-06-02 14:10 ` [PATCH Part2 RFC v3 15/37] crypto: ccp: Handle the legacy TMR allocation when SNP is enabled Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 16/37] crypto: ccp: Handle the legacy SEV command " Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 17/37] KVM: SVM: make AVIC backing, VMSA and VMCB memory allocation SNP safe Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 18/37] KVM: SVM: Add initial SEV-SNP support Brijesh Singh
2021-06-02 14:10 ` Brijesh Singh [this message]
2021-06-02 14:10 ` [PATCH Part2 RFC v3 20/37] KVM: SVM: Add KVM_SEV_SNP_LAUNCH_START command Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 21/37] KVM: SVM: Add KVM_SEV_SNP_LAUNCH_UPDATE command Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 22/37] KVM: SVM: Reclaim the guest pages when SEV-SNP VM terminates Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 23/37] KVM: SVM: Add KVM_SEV_SNP_LAUNCH_FINISH command Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 24/37] KVM: X86: Add kvm_x86_ops to get the max page level for the TDP Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 25/37] KVM: X86: Introduce kvm_mmu_map_tdp_page() for use by SEV Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 26/37] KVM: X86: Introduce kvm_mmu_get_tdp_walk() for SEV-SNP use Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 27/37] KVM: X86: Define new RMP check related #NPF error bits Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 28/37] KVM: X86: update page-fault trace to log the 64-bit error code Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 29/37] KVM: SVM: Add support to handle GHCB GPA register VMGEXIT Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 30/37] KVM: SVM: Add support to handle MSR based Page State Change VMGEXIT Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 31/37] KVM: SVM: Add support to handle " Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 32/37] KVM: Add arch hooks to track the host write to guest memory Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 33/37] KVM: X86: Export the kvm_zap_gfn_range() for the SNP use Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 34/37] KVM: SVM: Add support to handle the RMP nested page fault Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 35/37] KVM: SVM: Provide support for SNP_GUEST_REQUEST NAE event Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 36/37] KVM: SVM: Use a VMSA physical address variable for populating VMCB Brijesh Singh
2021-06-02 14:10 ` [PATCH Part2 RFC v3 37/37] KVM: SVM: Support SEV-SNP AP Creation NAE event Brijesh Singh
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