From: Kai Huang <kai.huang@xxxxxxxxx>
KVM will need to consult some essential TDX global information to create
and run TDX guests. Get the global information after initializing TDX.
Signed-off-by: Kai Huang <kai.huang@xxxxxxxxx>
Signed-off-by: Rick Edgecombe <rick.p.edgecombe@xxxxxxxxx>
Message-ID: <20241030190039.77971-3-rick.p.edgecombe@xxxxxxxxx>
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
---
arch/x86/kvm/vmx/tdx.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c
index 3c089ed3b843..b74a50e8d086 100644
--- a/arch/x86/kvm/vmx/tdx.c
+++ b/arch/x86/kvm/vmx/tdx.c
@@ -13,6 +13,8 @@ module_param_named(tdx, enable_tdx, bool, 0444);
static enum cpuhp_state tdx_cpuhp_state;
+static const struct tdx_sys_info *tdx_sysinfo;
+
static int tdx_online_cpu(unsigned int cpu)
{
unsigned long flags;
@@ -92,11 +94,20 @@ static int __init __tdx_bringup(void)
if (r)
goto tdx_bringup_err;
+ /* Get TDX global information for later use */
+ tdx_sysinfo = tdx_get_sysinfo();
+ if (WARN_ON_ONCE(!tdx_sysinfo)) {
+ r = -EINVAL;
+ goto get_sysinfo_err;
+ }
+
/*
* Leave hardware virtualization enabled after TDX is enabled
* successfully. TDX CPU hotplug depends on this.
*/
return 0;
+get_sysinfo_err:
+ __tdx_cleanup();
tdx_bringup_err:
kvm_disable_virtualization();
return r;
--
2.43.5
