Ard Biesheuvel 99b863d2e8 x86/sev: Disable UBSAN on SEV code that may execute very early ... Clang 14 and older may emit UBSAN instrumentation into code that is inlined into functions marked with __no_sanitize_undefined¹. This may result in faults when the code is executed very early, which may be the case for functions annotated as __head. Now that this requirement is strictly enforced, the build will fail in this case with the following message Absolute reference to symbol '.data' not permitted in .head.text Work around this by disabling UBSAN instrumentation on all SEV core code. ¹ https://lore.kernel.org/r/20250101024348.GA1828419@ax162 [ bp: Add a footnote with Nathan's detailed explanation and a Fixes tag ] Fixes: 3b6f99a94b ("x86/boot: Disable UBSAN in early boot code") Signed-off-by: Ard Biesheuvel <ardb@kernel.org> Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de> Reviewed-by: Nathan Chancellor <nathan@kernel.org> Link: https://lore.kernel.org/r/20250101115119.114584-2-ardb@kernel.org		2025-01-02 12:13:13 +01:00
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sev	x86/sev: Disable UBSAN on SEV code that may execute very early	2025-01-02 12:13:13 +01:00
tdx	x86/tdx: Enable CPU topology enumeration	2024-11-07 10:27:45 -08:00
core.c
Makefile	x86/sev: Move SEV compilation units	2024-07-11 11:55:58 +02:00