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Peter Anvin" Subject: [PATCH v9 17/23] x86/virt/seamldr: Do TDX per-CPU initialization after module installation Date: Wed, 13 May 2026 08:10:00 -0700 Message-ID: <20260513151045.1420990-18-chao.gao@intel.com> X-Mailer: git-send-email 2.52.0 In-Reply-To: <20260513151045.1420990-1-chao.gao@intel.com> References: <20260513151045.1420990-1-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 After installing the new TDX module, each CPU needs to be initialized again to make the CPU ready to run any other SEAMCALLs. So, export and call tdx_cpu_enable() on all CPUs. Signed-off-by: Chao Gao Reviewed-by: Xu Yilun Reviewed-by: Tony Lindgren Reviewed-by: Kai Huang Reviewed-by: Kiryl Shutsemau (Meta) Reviewed-by: Rick Edgecombe --- arch/x86/include/asm/tdx.h | 1 + arch/x86/virt/vmx/tdx/seamldr.c | 4 ++++ arch/x86/virt/vmx/tdx/tdx.c | 2 +- 3 files changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/x86/include/asm/tdx.h b/arch/x86/include/asm/tdx.h index 27376db7ddac..5d750fe53669 100644 --- a/arch/x86/include/asm/tdx.h +++ b/arch/x86/include/asm/tdx.h @@ -107,6 +107,7 @@ static inline long tdx_kvm_hypercall(unsigned int nr, unsigned long p1, #ifdef CONFIG_INTEL_TDX_HOST void tdx_init(void); +int tdx_cpu_enable(void); const char *tdx_dump_mce_info(struct mce *m); const struct tdx_sys_info *tdx_get_sysinfo(void); diff --git a/arch/x86/virt/vmx/tdx/seamldr.c b/arch/x86/virt/vmx/tdx/seamldr.c index 9d0e7e8c6c20..e4a3271051f6 100644 --- a/arch/x86/virt/vmx/tdx/seamldr.c +++ b/arch/x86/virt/vmx/tdx/seamldr.c @@ -177,6 +177,7 @@ enum module_update_state { MODULE_UPDATE_START, MODULE_UPDATE_SHUTDOWN, MODULE_UPDATE_CPU_INSTALL, + MODULE_UPDATE_CPU_INIT, MODULE_UPDATE_DONE, }; @@ -254,6 +255,9 @@ static int do_seamldr_install_module(void *seamldr_params) case MODULE_UPDATE_CPU_INSTALL: ret = seamldr_install(seamldr_params); break; + case MODULE_UPDATE_CPU_INIT: + ret = tdx_cpu_enable(); + break; default: break; } diff --git a/arch/x86/virt/vmx/tdx/tdx.c b/arch/x86/virt/vmx/tdx/tdx.c index 20b3b33e4677..5e54da302f2d 100644 --- a/arch/x86/virt/vmx/tdx/tdx.c +++ b/arch/x86/virt/vmx/tdx/tdx.c @@ -106,7 +106,7 @@ static int try_init_module_global(void) * (and TDX module global initialization SEAMCALL if not done) on local cpu to * make this cpu be ready to run any other SEAMCALLs. */ -static int tdx_cpu_enable(void) +int tdx_cpu_enable(void) { struct tdx_module_args args = {}; int ret; -- 2.52.0