[16/33] KVM: TDX: Get TDX global information

Commit Message

Paolo Bonzini Feb. 26, 2025, 6:14 p.m. UTC

From: Kai Huang <[e-mail]>

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 <[e-mail]>
Signed-off-by: Rick Edgecombe <[e-mail]>
Message-ID: <[e-mail]>
Signed-off-by: Paolo Bonzini <[e-mail]>
---
 arch/x86/kvm/vmx/tdx.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

Patch

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;