Re: [PATCH v5 13/22] x86/virt/seamldr: Install a new TDX module

[Chao Gao <chao.gao@intel.com>]

On Thu, Mar 19, 2026 at 01:32:07PM +0000, Kiryl Shutsemau wrote:
>On Sun, Mar 15, 2026 at 06:58:33AM -0700, Chao Gao wrote:
>> @@ -225,6 +227,7 @@ static void ack_state(void)
>>  static int do_seamldr_install_module(void *seamldr_params)
>>  {
>>  	enum module_update_state newstate, curstate = MODULE_UPDATE_START;
>> +	struct tdx_module_args args = {};
>>  	int cpu = smp_processor_id();
>>  	bool primary;
>>  	int ret = 0;
>> @@ -243,6 +246,10 @@ static int do_seamldr_install_module(void *seamldr_params)
>>  				if (primary)
>>  					ret = tdx_module_shutdown();
>>  				break;
>> +			case MODULE_UPDATE_CPU_INSTALL:
>> +				args.rcx = __pa(seamldr_params);
>> +				ret = seamldr_call(P_SEAMLDR_INSTALL, &args);
>
>I think it should be in a helper alongside with the tdx_module_args.

Will do. Here is the updated version:

diff --git a/arch/x86/virt/vmx/tdx/seamldr.c b/arch/x86/virt/vmx/tdx/seamldr.c
index bb4aa6327eee..cd2aa2eabb65 100644
--- a/arch/x86/virt/vmx/tdx/seamldr.c
+++ b/arch/x86/virt/vmx/tdx/seamldr.c
@@ -19,6 +19,7 @@
 
 /* P-SEAMLDR SEAMCALL leaf function */
 #define P_SEAMLDR_INFO			0x8000000000000000
+#define P_SEAMLDR_INSTALL		0x8000000000000001
 
 #define SEAMLDR_MAX_NR_MODULE_4KB_PAGES	496
 #define SEAMLDR_MAX_NR_SIG_4KB_PAGES	4
@@ -72,6 +73,13 @@ int seamldr_get_info(struct seamldr_info *seamldr_info)
 }
 EXPORT_SYMBOL_FOR_MODULES(seamldr_get_info, "tdx-host");
 
+static int seamldr_install(const struct seamldr_params *params)
+{
+	struct tdx_module_args args = { .rcx = __pa(params) };
+
+	return seamldr_call(P_SEAMLDR_INSTALL, &args);
+}
+
 static void free_seamldr_params(struct seamldr_params *params)
 {
	free_page((unsigned long)params);
@@ -186,6 +194,7 @@ static struct seamldr_params *init_seamldr_params(const u8 *data, u32 size)
 enum module_update_state {
	MODULE_UPDATE_START,
	MODULE_UPDATE_SHUTDOWN,
+	MODULE_UPDATE_CPU_INSTALL,
	MODULE_UPDATE_DONE,
 };
 
@@ -243,6 +252,9 @@ static int do_seamldr_install_module(void *seamldr_params)
				if (primary)
					ret = tdx_module_shutdown();
				break;
+			case MODULE_UPDATE_CPU_INSTALL:
+				ret = seamldr_install(seamldr_params);
+				break;
			default:
				break;
			}