linux.git/arch/x86/coco/Makefile, branch master Linux kernel source tree x86/sev: Move SEV compilation units 2024-07-11T09:55:58+00:00 Borislav Petkov (AMD) bp@alien8.de 2024-06-19T09:03:16+00:00 38918e0bb2c51c21ea464b071a254b27ff9aa71d A long time ago it was agreed upon that the coco stuff needs to go where it belongs: https://lore.kernel.org/all/Yg5nh1RknPRwIrb8@zn.tnic and not keep it in arch/x86/kernel. TDX did that and SEV can't find time to do so. So lemme do it. If people have trouble converting their ongoing featuritis patches, ask me for a sed script. No functional changes. Move the instrumentation exclusion bits too, as helpfully caught and reported by the 0day folks. Closes: https://lore.kernel.org/oe-kbuild-all/202406220748.hG3qlmDx-lkp@intel.com Reported-by: kernel test robot <lkp@intel.com> Closes: https://lore.kernel.org/oe-lkp/202407091342.46d7dbb-oliver.sang@intel.com Reported-by: kernel test robot <oliver.sang@intel.com> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Nikunj A Dadhania <nikunj@amd.com> Reviewed-by: Ashish Kalra <ashish.kalra@amd.com> Tested-by: kernel test robot <oliver.sang@intel.com> Link: https://lore.kernel.org/r/20240619093014.17962-1-bp@kernel.org 
A long time ago it was agreed upon that the coco stuff needs to go where
it belongs:

  https://lore.kernel.org/all/Yg5nh1RknPRwIrb8@zn.tnic

and not keep it in arch/x86/kernel. TDX did that and SEV can't find time
to do so. So lemme do it. If people have trouble converting their
ongoing featuritis patches, ask me for a sed script.

No functional changes.

Move the instrumentation exclusion bits too, as helpfully caught and
reported by the 0day folks.

Closes: https://lore.kernel.org/oe-kbuild-all/202406220748.hG3qlmDx-lkp@intel.com
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-lkp/202407091342.46d7dbb-oliver.sang@intel.com
Reported-by: kernel test robot <oliver.sang@intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Nikunj A Dadhania <nikunj@amd.com>
Reviewed-by: Ashish Kalra <ashish.kalra@amd.com>
Tested-by: kernel test robot <oliver.sang@intel.com>
Link: https://lore.kernel.org/r/20240619093014.17962-1-bp@kernel.org
x86/tdx: Detect running as a TDX guest in early boot 2022-04-07T15:27:50+00:00 Kuppuswamy Sathyanarayanan sathyanarayanan.kuppuswamy@linux.intel.com 2022-04-05T23:29:10+00:00 59bd54a84d15e9335de5b8abe7b3b9713a36b99b In preparation of extending cc_platform_has() API to support TDX guest, use CPUID instruction to detect support for TDX guests in the early boot code (via tdx_early_init()). Since copy_bootdata() is the first user of cc_platform_has() API, detect the TDX guest status before it. Define a synthetic feature flag (X86_FEATURE_TDX_GUEST) and set this bit in a valid TDX guest platform. Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Andi Kleen <ak@linux.intel.com> Reviewed-by: Tony Luck <tony.luck@intel.com> Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Borislav Petkov <bp@suse.de> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/20220405232939.73860-2-kirill.shutemov@linux.intel.com 
In preparation of extending cc_platform_has() API to support TDX guest,
use CPUID instruction to detect support for TDX guests in the early
boot code (via tdx_early_init()). Since copy_bootdata() is the first
user of cc_platform_has() API, detect the TDX guest status before it.

Define a synthetic feature flag (X86_FEATURE_TDX_GUEST) and set this
bit in a valid TDX guest platform.

Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20220405232939.73860-2-kirill.shutemov@linux.intel.com
x86/cc: Move arch/x86/{kernel/cc_platform.c => coco/core.c} 2022-02-23T17:25:58+00:00 Kirill A. Shutemov kirill.shutemov@linux.intel.com 2022-02-22T18:57:38+00:00 6198311093dabcafbe345d580c56b5d5a9ab5f3c Move cc_platform.c to arch/x86/coco/. The directory is going to be the home space for code related to confidential computing. Intel TDX code will land here. AMD SEV code will also eventually be moved there. No functional changes. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com> Link: https://lore.kernel.org/r/20220222185740.26228-3-kirill.shutemov@linux.intel.com 
Move cc_platform.c to arch/x86/coco/. The directory is going to be the
home space for code related to confidential computing.

Intel TDX code will land here. AMD SEV code will also eventually be
moved there.

No functional changes.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Link: https://lore.kernel.org/r/20220222185740.26228-3-kirill.shutemov@linux.intel.com