Commit 45154fb0 authored by Kai Huang's avatar Kai Huang Committed by Paolo Bonzini
Browse files

KVM: TDX: Get TDX global information 



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: default avatarKai Huang <kai.huang@intel.com>
Signed-off-by: default avatarRick Edgecombe <rick.p.edgecombe@intel.com>
Message-ID: <20241030190039.77971-3-rick.p.edgecombe@intel.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent fcdbdf63

arch/x86/kvm/vmx/tdx.c

+11 −0
Original line number Diff line number Diff line
@@ -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;