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Kai Huang 0b3bc018e8 x86/virt/tdx: Avoid indirect calls to TDX assembly functions ... Two 'static inline' TDX helper functions (sc_retry() and sc_retry_prerr()) take function pointer arguments which refer to assembly functions. Normally, the compiler inlines the TDX helper, realizes that the function pointer targets are completely static -- thus can be resolved at compile time -- and generates direct call instructions. But, other times (like when CONFIG_CC_OPTIMIZE_FOR_SIZE=y), the compiler declines to inline the helpers and will instead generate indirect call instructions. Indirect calls to assembly functions require special annotation (for various Control Flow Integrity mechanisms). But TDX assembly functions lack the special annotations and can only be called directly. Annotate both the helpers as '__always_inline' to prod the compiler into maintaining the direct calls. There is no guarantee here, but Peter has volunteered to report the compiler bug if this assumption ever breaks[1]. Fixes: 1e66a7e275 ("x86/virt/tdx: Handle SEAMCALL no entropy error in common code") Fixes: df01f5ae07 ("x86/virt/tdx: Add SEAMCALL error printing for module initialization") Signed-off-by: Kai Huang <kai.huang@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/lkml/20250605145914.GW39944@noisy.programming.kicks-ass.net/ [1] Link: https://lore.kernel.org/all/20250606130737.30713-1-kai.huang%40intel.com		2025-06-10 12:32:52 -07:00
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svm	x86/cpuid: Set <asm/cpuid/api.h> as the main CPUID header	2025-05-15 18:23:55 +02:00
vmx	x86/virt/tdx: Avoid indirect calls to TDX assembly functions	2025-06-10 12:32:52 -07:00
Makefile	x86/build: Use obj-y to descend into arch/x86/virt/	2024-03-30 10:41:49 +01:00