From: Ștefan Șicleru <ssicl...@bitdefender.com>
This function is needed for the KVMI_VCPU_SET_VE_INFO command.
Signed-off-by: Ștefan Șicleru <ssicl...@bitdefender.com>
Signed-off-by: Adalbert Lazăr <ala...@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)
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