Logical-cpu scope initialization requires calling TDH.SYS.LP.INIT on all
BIOS-enabled cpus, otherwise the TDH.SYS.CONFIG SEAMCALL will fail.
TDH.SYS.LP.INIT can be called concurrently on all cpus.
Following global initialization, do the logical-cpu scope initialization
by calling TDH.SYS.LP.INIT on all online cpus. Whether all BIOS-enabled
cpus are online is not checked here for simplicity. The user of TDX
should guarantee all BIOS-enabled cpus are online.
Signed-off-by: Kai Huang <kai.huang@xxxxxxxxx>
---
arch/x86/virt/vmx/tdx.c | 12 ++++++++++++
arch/x86/virt/vmx/tdx.h | 1 +
2 files changed, 13 insertions(+)
diff --git a/arch/x86/virt/vmx/tdx.c b/arch/x86/virt/vmx/tdx.c
index 197c721d5388..c9de3d6f903d 100644
--- a/arch/x86/virt/vmx/tdx.c
+++ b/arch/x86/virt/vmx/tdx.c
@@ -462,6 +462,13 @@ static int __tdx_detect(void)
return -ENODEV;
}
+static int tdx_module_init_cpus(void)
+{
+ struct seamcall_ctx sc = { .fn = TDH_SYS_LP_INIT };
+
+ return seamcall_on_each_cpu(&sc);
+}
+
static int init_tdx_module(void)
{
int ret;
@@ -471,6 +478,11 @@ static int init_tdx_module(void)
if (ret)
goto out;
+ /* Logical-cpu scope initialization */
+ ret = tdx_module_init_cpus();
+ if (ret)
+ goto out;
+
/*
* Return -EFAULT until all steps of TDX module
* initialization are done.
diff --git a/arch/x86/virt/vmx/tdx.h b/arch/x86/virt/vmx/tdx.h
index f0983b1936d8..b8cfdd6e12f3 100644
--- a/arch/x86/virt/vmx/tdx.h
+++ b/arch/x86/virt/vmx/tdx.h
@@ -39,6 +39,7 @@ struct p_seamldr_info {
* TDX module SEAMCALL leaf functions
*/
#define TDH_SYS_INIT 33
+#define TDH_SYS_LP_INIT 35
#define TDH_SYS_LP_SHUTDOWN 44
struct tdx_module_output;
--
2.33.1
