en Copyright 2015 Java http://kernelsources.org:8080/source/history/linux/drivers/virt/coco/tdx-host/Makefile#b0820861748f43759bbf4c319ed1277cff3c5921 Merge tag 'x86_tdx_for_7.2-rc1' of gitolite.kernel.org:pub/scm/linux/kernel/git/tip/tipPull x86 TDX updates from Dave Hansen: "There are a few cleanups, and some changes that should allow TDX and kexec to coexist nicely. The biggest change, however, is support for updating the TDX module after boot, just like CPU microcode. TDX users really want this because it lets them do security updates without tearing things down and rebooting. - Add TDX module update support - Make kexec and TDX finally place nice together - Put TDX error codes into a single header"* tag 'x86_tdx_for_7.2-rc1' of gitolite.kernel.org:pub/scm/linux/kernel/git/tip/tip: (30 commits) x86/virt/tdx: Document TDX module update x86/virt/tdx: Enable TDX module runtime updates x86/virt/tdx: Refresh TDX module version after update coco/tdx-host: Lock out module updates when reading version x86/virt/seamldr: Add module update locking x86/virt/tdx: Restore TDX module state x86/virt/seamldr: Initialize the newly-installed TDX module x86/virt/seamldr: Install a new TDX module x86/virt/tdx: Reset software states during TDX module shutdown x86/virt/seamldr: Shut down the current TDX module x86/virt/seamldr: Abort updates after a failed step x86/virt/seamldr: Introduce skeleton for TDX module updates x86/virt/seamldr: Allocate and populate a module update request coco/tdx-host: Implement firmware upload sysfs ABI for TDX module updates coco/tdx-host: Don't expose P-SEAMLDR information on CPUs with erratum coco/tdx-host: Expose P-SEAMLDR information via sysfs x86/virt/seamldr: Add a helper to retrieve P-SEAMLDR information x86/virt/seamldr: Introduce a wrapper for P-SEAMLDR SEAMCALLs coco/tdx-host: Expose TDX module version coco/tdx-host: Introduce a "tdx_host" device ... List of files: /linux/drivers/virt/coco/tdx-host/Makefile Tue, 16 Jun 2026 02:56:12 +0200 Linus Torvalds <torvalds@linux-foundation.org> http://kernelsources.org:8080/source/history/linux/drivers/virt/coco/tdx-host/Makefile#59783353467958517a3e511394d7ab3aed03bc6a coco/tdx-host: Introduce a "tdx_host" deviceTDX depends on a platform firmware module that runs on the CPU.Unlike other CoCo architectures, TDX has no hardware "device"running the show, just a blob on the CPU.Create a virtual device to anchor interactions with this platformfirmware. This lets later code: - expose metadata: TDX module version, seamldr version, to userspace as device attributes - implement firmware uploader APIs (which are tied to a device) to support TDX module runtime updatesUse a faux device because the TDX module is singular within the systemand has no platform resources. Using a faux device eliminates the needto create a stub bus.The call to tdx_get_sysinfo() ensures that the TDX module is ready toprovide services.Note that AMD has a PCI device for the PSP for SEV and ARM CCA willlikely have a faux device [1].Thanks to Dan and Yilun for all the help on this one.[ dhansen: trim changelog ]Signed-off-by: Chao Gao <chao.gao@intel.com>Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>Reviewed-by: Tony Lindgren <tony.lindgren@linux.intel.com>Reviewed-by: Xu Yilun <yilun.xu@linux.intel.com>Reviewed-by: Kai Huang <kai.huang@intel.com>Reviewed-by: Kiryl Shutsemau (Meta) <kas@kernel.org>Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>Link: https://lore.kernel.org/all/2025073035-bulginess-rematch-b92e@gregkh/ # [1]Link: https://patch.msgid.link/20260520133909.409394-7-chao.gao@intel.com List of files: /linux/drivers/virt/coco/tdx-host/Makefile Thu, 21 May 2026 00:28:52 +0200 Chao Gao <chao.gao@intel.com>