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From: "Adalbert Lazăr" <alazar@bitdefender.com>
To: kvm@vger.kernel.org
Cc: virtualization@lists.linux-foundation.org,
	"Paolo Bonzini" <pbonzini@redhat.com>,
	"Ștefan Șicleru" <ssicleru@bitdefender.com>,
	"Adalbert Lazăr" <alazar@bitdefender.com>
Subject: [RFC PATCH v1 26/34] KVM: x86: add .set_ve_info()
Date: Wed, 22 Jul 2020 19:01:13 +0300
Message-ID: <20200722160121.9601-27-alazar@bitdefender.com> (raw)
In-Reply-To: <20200722160121.9601-1-alazar@bitdefender.com>

From: Ștefan Șicleru <ssicleru@bitdefender.com>

This function is needed for the KVMI_VCPU_SET_VE_INFO command.

Signed-off-by: Ștefan Șicleru <ssicleru@bitdefender.com>
Signed-off-by: Adalbert Lazăr <alazar@bitdefender.com>
---
 arch/x86/include/asm/kvm_host.h |  2 ++
 arch/x86/include/asm/vmx.h      |  1 +
 arch/x86/kvm/vmx/vmx.c          | 40 +++++++++++++++++++++++++++++++++
 3 files changed, 43 insertions(+)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index e89cea041ec9..4cee641af48e 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1314,6 +1314,8 @@ struct kvm_x86_ops {
 	u16 (*get_ept_view)(struct kvm_vcpu *vcpu);
 	int (*set_ept_view)(struct kvm_vcpu *vcpu, u16 view);
 	int (*control_ept_view)(struct kvm_vcpu *vcpu, u16 view, u8 visible);
+	int (*set_ve_info)(struct kvm_vcpu *vcpu, unsigned long ve_info,
+				bool trigger_vmexit);
 };
 
 struct kvm_x86_nested_ops {
diff --git a/arch/x86/include/asm/vmx.h b/arch/x86/include/asm/vmx.h
index 8082158e3e96..222fe9c7f463 100644
--- a/arch/x86/include/asm/vmx.h
+++ b/arch/x86/include/asm/vmx.h
@@ -157,6 +157,7 @@ static inline int vmx_misc_mseg_revid(u64 vmx_misc)
 enum vmcs_field {
 	VIRTUAL_PROCESSOR_ID            = 0x00000000,
 	POSTED_INTR_NV                  = 0x00000002,
+	EPTP_INDEX			= 0x00000004,
 	GUEST_ES_SELECTOR               = 0x00000800,
 	GUEST_CS_SELECTOR               = 0x00000802,
 	GUEST_SS_SELECTOR               = 0x00000804,
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index b65bd0d144e5..871cc49063d8 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -4425,6 +4425,45 @@ static int vmx_control_ept_view(struct kvm_vcpu *vcpu, u16 view, u8 visible)
 	return 0;
 }
 
+static int vmx_set_ve_info(struct kvm_vcpu *vcpu, unsigned long ve_info,
+				bool trigger_vmexit)
+{
+	struct page *ve_info_pg;
+	struct vcpu_vmx *vmx = to_vmx(vcpu);
+	int idx;
+	u32 eb;
+
+	if (!kvm_ve_supported)
+		return -KVM_EOPNOTSUPP;
+
+	idx = srcu_read_lock(&vcpu->kvm->srcu);
+	ve_info_pg = kvm_vcpu_gpa_to_page(vcpu, ve_info);
+	srcu_read_unlock(&vcpu->kvm->srcu, idx);
+
+	if (is_error_page(ve_info_pg))
+		return -KVM_EINVAL;
+
+	vmcs_write64(VE_INFO_ADDRESS, page_to_phys(ve_info_pg));
+
+	/* Make sure EPTP_INDEX is up-to-date before enabling #VE */
+	vmcs_write16(EPTP_INDEX, vmx->view);
+
+	/* Enable #VE mechanism */
+	secondary_exec_controls_setbit(vmx, SECONDARY_EXEC_EPT_VE);
+
+	/* Decide if #VE exception should trigger a VM exit */
+	eb = vmcs_read32(EXCEPTION_BITMAP);
+
+	if (trigger_vmexit)
+		eb |= (1u << VE_VECTOR);
+	else
+		eb &= ~(1u << VE_VECTOR);
+
+	vmcs_write32(EXCEPTION_BITMAP, eb);
+
+	return 0;
+}
+
 #define VMX_XSS_EXIT_BITMAP 0
 
 /*
@@ -8350,6 +8389,7 @@ static struct kvm_x86_ops vmx_x86_ops __initdata = {
 	.get_ept_view = vmx_get_ept_view,
 	.set_ept_view = vmx_set_ept_view,
 	.control_ept_view = vmx_control_ept_view,
+	.set_ve_info = vmx_set_ve_info,
 };
 
 static __init int hardware_setup(void)

  parent reply index

Thread overview: 35+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-22 16:00 [RFC PATCH v1 00/34] VM introspection - EPT Views and Virtualization Exceptions Adalbert Lazăr
2020-07-22 16:00 ` [RFC PATCH v1 01/34] KVM: x86: export .get_vmfunc_status() Adalbert Lazăr
2020-07-22 16:00 ` [RFC PATCH v1 02/34] KVM: x86: export .get_eptp_switching_status() Adalbert Lazăr
2020-07-22 16:00 ` [RFC PATCH v1 03/34] KVM: x86: add kvm_get_ept_view() Adalbert Lazăr
2020-07-22 16:00 ` [RFC PATCH v1 04/34] KVM: x86: mmu: reindent to avoid lines longer than 80 chars Adalbert Lazăr
2020-07-22 16:00 ` [RFC PATCH v1 05/34] KVM: x86: mmu: add EPT view parameter to kvm_mmu_get_page() Adalbert Lazăr
2020-07-22 16:00 ` [RFC PATCH v1 06/34] KVM: x86: mmu: add support for EPT switching Adalbert Lazăr
2020-07-22 16:00 ` [RFC PATCH v1 07/34] KVM: x86: mmu: increase mmu_memory_cache size Adalbert Lazăr
2020-07-22 16:00 ` [RFC PATCH v1 08/34] KVM: x86: add .set_ept_view() Adalbert Lazăr
2020-07-22 16:00 ` [RFC PATCH v1 09/34] KVM: x86: add .control_ept_view() Adalbert Lazăr
2020-07-22 16:00 ` [RFC PATCH v1 10/34] KVM: x86: page track: allow page tracking for different EPT views Adalbert Lazăr
2020-07-22 16:00 ` [RFC PATCH v1 11/34] KVM: x86: mmu: allow zapping shadow pages for specific " Adalbert Lazăr
2020-07-22 16:00 ` [RFC PATCH v1 12/34] KVM: introspection: extend struct kvmi_features with the EPT views status support Adalbert Lazăr
2020-07-22 16:01 ` [RFC PATCH v1 13/34] KVM: introspection: add KVMI_VCPU_GET_EPT_VIEW Adalbert Lazăr
2020-07-22 16:01 ` [RFC PATCH v1 14/34] KVM: introspection: add 'view' field to struct kvmi_event_arch Adalbert Lazăr
2020-07-22 16:01 ` [RFC PATCH v1 15/34] KVM: introspection: add KVMI_VCPU_SET_EPT_VIEW Adalbert Lazăr
2020-07-22 16:01 ` [RFC PATCH v1 16/34] KVM: introspection: add KVMI_VCPU_CONTROL_EPT_VIEW Adalbert Lazăr
2020-07-22 16:01 ` [RFC PATCH v1 17/34] KVM: introspection: extend the access rights database with EPT view info Adalbert Lazăr
2020-07-22 16:01 ` [RFC PATCH v1 18/34] KVM: introspection: extend KVMI_VM_SET_PAGE_ACCESS " Adalbert Lazăr
2020-07-22 16:01 ` [RFC PATCH v1 19/34] KVM: introspection: clean non-default EPTs on unhook Adalbert Lazăr
2020-07-22 16:01 ` [RFC PATCH v1 20/34] KVM: x86: vmx: add support for virtualization exceptions Adalbert Lazăr
2020-07-22 16:01 ` [RFC PATCH v1 21/34] KVM: VMX: Define EPT suppress #VE bit (bit 63 in EPT leaf entries) Adalbert Lazăr
2020-07-22 16:01 ` [RFC PATCH v1 22/34] KVM: VMX: Suppress EPT violation #VE by default (when enabled) Adalbert Lazăr
2020-07-22 16:01 ` [RFC PATCH v1 23/34] KVM: x86: mmu: fix: update present_mask in spte_read_protect() Adalbert Lazăr
2020-07-22 16:01 ` [RFC PATCH v1 24/34] KVM: vmx: trigger vm-exits for mmio sptes by default when #VE is enabled Adalbert Lazăr
2020-07-22 16:01 ` [RFC PATCH v1 25/34] KVM: x86: svm: set .clear_page() Adalbert Lazăr
2020-07-22 16:01 ` Adalbert Lazăr [this message]
2020-07-22 16:01 ` [RFC PATCH v1 27/34] KVM: x86: add .disable_ve() Adalbert Lazăr
2020-07-22 16:01 ` [RFC PATCH v1 28/34] KVM: x86: page_track: add support for suppress #VE bit Adalbert Lazăr
2020-07-22 16:01 ` [RFC PATCH v1 29/34] KVM: vmx: make use of EPTP_INDEX in vmx_handle_exit() Adalbert Lazăr
2020-07-22 16:01 ` [RFC PATCH v1 30/34] KVM: vmx: make use of EPTP_INDEX in vmx_set_ept_view() Adalbert Lazăr
2020-07-22 16:01 ` [RFC PATCH v1 31/34] KVM: introspection: add #VE host capability checker Adalbert Lazăr
2020-07-22 16:01 ` [RFC PATCH v1 32/34] KVM: introspection: add KVMI_VCPU_SET_VE_INFO/KVMI_VCPU_DISABLE_VE Adalbert Lazăr
2020-07-22 16:01 ` [RFC PATCH v1 33/34] KVM: introspection: mask out non-rwx flags when reading/writing from/to the internal database Adalbert Lazăr
2020-07-22 16:01 ` [RFC PATCH v1 34/34] KVM: introspection: add KVMI_VM_SET_PAGE_SVE Adalbert Lazăr

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