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Peter Anvin" Subject: [PATCH v4 16/24] x86/virt/seamldr: Install a new TDX Module Date: Thu, 12 Feb 2026 06:35:19 -0800 Message-ID: <20260212143606.534586-17-chao.gao@intel.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260212143606.534586-1-chao.gao@intel.com> References: <20260212143606.534586-1-chao.gao@intel.com> Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Following the shutdown of the existing TDX Module, the update process continues with installing the new module. P-SEAMLDR provides the SEAMLDR.INSTALL SEAMCALL to perform this installation, which must be executed serially across all CPUs. Implement SEAMLDR.INSTALL and execute it on every CPU. Signed-off-by: Chao Gao Reviewed-by: Tony Lindgren --- arch/x86/virt/vmx/tdx/seamldr.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/arch/x86/virt/vmx/tdx/seamldr.c b/arch/x86/virt/vmx/tdx/seamldr.c index 4e0a98404c7f..4537311780b1 100644 --- a/arch/x86/virt/vmx/tdx/seamldr.c +++ b/arch/x86/virt/vmx/tdx/seamldr.c @@ -22,6 +22,7 @@ /* 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 @@ -198,6 +199,7 @@ static struct seamldr_params *init_seamldr_params(const u8 *data, u32 size) enum tdp_state { TDP_START, TDP_SHUTDOWN, + TDP_CPU_INSTALL, TDP_DONE, }; @@ -232,9 +234,10 @@ static void print_update_failure_message(void) * See multi_cpu_stop() from where this multi-cpu state-machine was * adopted, and the rationale for touch_nmi_watchdog() */ -static int do_seamldr_install_module(void *params) +static int do_seamldr_install_module(void *seamldr_params) { enum tdp_state newstate, curstate = TDP_START; + struct tdx_module_args args = {}; int cpu = smp_processor_id(); bool primary; int ret = 0; @@ -253,6 +256,10 @@ static int do_seamldr_install_module(void *params) if (primary) ret = tdx_module_shutdown(); break; + case TDP_CPU_INSTALL: + args.rcx = __pa(seamldr_params); + ret = seamldr_call(P_SEAMLDR_INSTALL, &args); + break; default: break; } -- 2.47.3