x86/insn-eval: Introduce insn_get_modrm_reg_ptr()

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The helper returns a pointer to the register indicated by
ModRM byte.

It's going to replace vc_insn_get_reg() in the SEV MMIO
implementation. TDX MMIO implementation will also use it.

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>
Tested-by: Joerg Roedel <jroedel@suse.de>
Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Link: https://lkml.kernel.org/r/20211130184933.31005-3-kirill.shutemov@linux.intel.com

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Kirill A. Shutemov 2021-11-30 21:49:31 +03:00 • committed by Dave Hansen

parent 23ef731e43

commit d5ec1877df

2 changed files with 21 additions and 0 deletions

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arch/x86/include/asm/insn-eval.h

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20

arch/x86/lib/insn-eval.c

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