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KVM: TDX: Get TDX global information

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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@intel.com>
Signed-off-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Message-ID: <20241030190039.77971-3-rick.p.edgecombe@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Kai Huang
2024-10-30 12:00:15 -07:00
committed by Paolo Bonzini
parent fcdbdf6343
commit 45154fb010
1 changed files with 11 additions and 0 deletions
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11
arch/x86/kvm/vmx/tdx.c
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@@ -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;