Kiryl Shutsemau (Meta) 941370fc93 x86/tdx: Fix zero-extension for 32-bit port I/O ... According to x86 architecture rules, 32-bit operations zero-extend the result to 64 bits. The current implementation of handle_in() only masks the lower 32 bits, which preserves the upper 32 bits of RAX when a 32-bit port IN instruction is emulated. Use insn_assign_reg() to write the result back into RAX with proper partial-register-write semantics: 1- and 2-byte forms leave the upper bits untouched, the 4-byte form zero-extends to the full register. Fixes: 0314994883 ("x86/tdx: Port I/O: Add runtime hypercalls") Reported-by: Borys Tsyrulnikov <tsyrulnikov.borys@gmail.com> Signed-off-by: Kiryl Shutsemau (Meta) <kas@kernel.org> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Binbin Wu <binbin.wu@linux.intel.com> Link: https://lore.kernel.org/all/CAKw_Dz96rfSQc6Rn+9QBcUFHhmkK+9zu+P=bxowfZwxrATCBRg@mail.gmail.com/ Cc:stable@vger.kernel.org Link: https://patch.msgid.link/20260713133753.223947-4-kirill@shutemov.name		2026-07-13 14:45:07 -07:00
..
debug.c	x86/tdx: Rename TDX_ATTR_* to TDX_TD_ATTR_*	2026-03-03 16:06:49 -08:00
Makefile	x86/tdx: Dump attributes and TD_CTLS on boot	2024-12-05 10:27:07 -08:00
tdcall.S	x86/tdx: Reimplement __tdx_hypercall() using TDX_MODULE_CALL asm	2023-09-12 16:30:14 -07:00
tdx-shared.c	x86/virt/tdx: Define TDX supported page sizes as macros	2023-12-08 09:12:00 -08:00
tdx.c	x86/tdx: Fix zero-extension for 32-bit port I/O	2026-07-13 14:45:07 -07:00