From: David Woodhouse <dwmw2@infradead.org>
To: kvm@vger.kernel.org
Cc: Paolo Bonzini <pbonzini@redhat.com>,
Ankur Arora <ankur.a.arora@oracle.com>,
Joao Martins <joao.m.martins@oracle.com>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
Sean Christopherson <seanjc@google.com>,
graf@amazon.com, iaslan@amazon.de, pdurrant@amazon.com,
aagch@amazon.com, fandree@amazon.com, hch@infradead.org
Subject: [PATCH v6 14/19] KVM: x86/xen: register vcpu info
Date: Wed, 3 Feb 2021 15:01:09 +0000 [thread overview]
Message-ID: <20210203150114.920335-15-dwmw2@infradead.org> (raw)
In-Reply-To: <20210203150114.920335-1-dwmw2@infradead.org>
From: Joao Martins <joao.m.martins@oracle.com>
The vcpu info supersedes the per vcpu area of the shared info page and
the guest vcpus will use this instead.
Signed-off-by: Joao Martins <joao.m.martins@oracle.com>
Signed-off-by: Ankur Arora <ankur.a.arora@oracle.com>
Signed-off-by: David Woodhouse <dwmw@amazon.co.uk>
---
arch/x86/include/asm/kvm_host.h | 2 ++
arch/x86/kvm/xen.c | 25 ++++++++++++++++++++++++-
include/uapi/linux/kvm.h | 3 +++
3 files changed, 29 insertions(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 07ae5887afa1..421d082d772d 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -523,6 +523,8 @@ struct kvm_vcpu_hv {
/* Xen HVM per vcpu emulation context */
struct kvm_vcpu_xen {
u64 hypercall_rip;
+ bool vcpu_info_set;
+ struct gfn_to_hva_cache vcpu_info_cache;
};
struct kvm_vcpu_arch {
diff --git a/arch/x86/kvm/xen.c b/arch/x86/kvm/xen.c
index 5cbf6955e509..2712f1aa9ac9 100644
--- a/arch/x86/kvm/xen.c
+++ b/arch/x86/kvm/xen.c
@@ -120,15 +120,31 @@ int kvm_xen_hvm_get_attr(struct kvm *kvm, struct kvm_xen_hvm_attr *data)
int kvm_xen_vcpu_set_attr(struct kvm_vcpu *vcpu, struct kvm_xen_vcpu_attr *data)
{
- int r = -ENOENT;
+ int idx, r = -ENOENT;
mutex_lock(&vcpu->kvm->lock);
+ idx = srcu_read_lock(&vcpu->kvm->srcu);
switch (data->type) {
+ case KVM_XEN_VCPU_ATTR_TYPE_VCPU_INFO:
+ /* No compat necessary here. */
+ BUILD_BUG_ON(sizeof(struct vcpu_info) !=
+ sizeof(struct compat_vcpu_info));
+
+ r = kvm_gfn_to_hva_cache_init(vcpu->kvm,
+ &vcpu->arch.xen.vcpu_info_cache,
+ data->u.gpa,
+ sizeof(struct vcpu_info));
+ if (!r)
+ vcpu->arch.xen.vcpu_info_set = true;
+ break;
+
+
default:
break;
}
+ srcu_read_unlock(&vcpu->kvm->srcu, idx);
mutex_unlock(&vcpu->kvm->lock);
return r;
}
@@ -140,6 +156,13 @@ int kvm_xen_vcpu_get_attr(struct kvm_vcpu *vcpu, struct kvm_xen_vcpu_attr *data)
mutex_lock(&vcpu->kvm->lock);
switch (data->type) {
+ case KVM_XEN_VCPU_ATTR_TYPE_VCPU_INFO:
+ if (vcpu->arch.xen.vcpu_info_set) {
+ data->u.gpa = vcpu->arch.xen.vcpu_info_cache.gpa;
+ r = 0;
+ }
+ break;
+
default:
break;
}
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index af09f07d6d02..a34a35a8f354 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -1612,10 +1612,13 @@ struct kvm_xen_vcpu_attr {
__u16 type;
__u16 pad[3];
union {
+ __u64 gpa;
__u64 pad[8];
} u;
};
+#define KVM_XEN_VCPU_ATTR_TYPE_VCPU_INFO 0x0
+
/* Secure Encrypted Virtualization command */
enum sev_cmd_id {
/* Guest initialization commands */
--
2.29.2
next prev parent reply other threads:[~2021-02-03 15:03 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-03 15:00 [PATCH v6 00/19] KVM: Add minimal support for Xen HVM guests David Woodhouse
2021-02-03 15:00 ` [PATCH v6 01/19] KVM: x86/xen: fix Xen hypercall page msr handling David Woodhouse
2021-02-03 15:00 ` [PATCH v6 02/19] KVM: x86/xen: Fix __user pointer handling for hypercall page installation David Woodhouse
2021-02-03 15:00 ` [PATCH v6 03/19] KVM: x86/xen: intercept xen hypercalls if enabled David Woodhouse
2021-02-03 15:00 ` [PATCH v6 04/19] KVM: x86/xen: Fix coexistence of Xen and Hyper-V hypercalls David Woodhouse
2021-02-03 15:01 ` [PATCH v6 05/19] KVM: x86/xen: Move KVM_XEN_HVM_CONFIG handling to xen.c David Woodhouse
2021-02-03 15:01 ` [PATCH v6 06/19] KVM: x86/xen: Add kvm_xen_enabled static key David Woodhouse
2021-02-03 15:01 ` [PATCH v6 07/19] KVM: x86/xen: add KVM_XEN_HVM_SET_ATTR/KVM_XEN_HVM_GET_ATTR David Woodhouse
2021-02-03 15:01 ` [PATCH v6 08/19] KVM: x86/xen: latch long_mode when hypercall page is set up David Woodhouse
2021-02-03 15:01 ` [PATCH v6 09/19] KVM: x86/xen: add definitions of compat_shared_info, compat_vcpu_info David Woodhouse
2021-02-03 15:01 ` [PATCH v6 10/19] KVM: x86/xen: register shared_info page David Woodhouse
2021-02-03 15:01 ` [PATCH v6 11/19] xen: add wc_sec_hi to struct shared_info David Woodhouse
2021-02-03 15:01 ` [PATCH v6 12/19] KVM: x86/xen: update wallclock region David Woodhouse
2021-02-03 15:01 ` [PATCH v6 13/19] KVM: x86/xen: Add KVM_XEN_VCPU_SET_ATTR/KVM_XEN_VCPU_GET_ATTR David Woodhouse
2021-02-03 15:01 ` David Woodhouse [this message]
2021-02-03 15:01 ` [PATCH v6 15/19] KVM: x86/xen: setup pvclock updates David Woodhouse
2021-02-03 15:01 ` [PATCH v6 16/19] KVM: x86/xen: register vcpu time info region David Woodhouse
2021-02-03 15:01 ` [PATCH v6 17/19] KVM: x86/xen: Add event channel interrupt vector upcall David Woodhouse
2021-02-03 15:01 ` [PATCH v6 18/19] KVM: x86: declare Xen HVM shared info capability and add test case David Woodhouse
2021-02-03 16:38 ` Paolo Bonzini
2021-02-03 17:55 ` David Woodhouse
2021-02-03 15:01 ` [PATCH v6 19/19] KVM: Add documentation for Xen hypercall and shared_info updates David Woodhouse
2021-02-03 16:17 ` Paolo Bonzini
2021-02-03 16:59 ` [PATCH v6 00/19] KVM: Add minimal support for Xen HVM guests Paolo Bonzini
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