linux-kernel - [RFC PATCH v2 18/35] KVM: selftests: Add compilation for instruction decoder library

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Message-ID: <20250923050942.206116-19-Neeraj.Upadhyay@amd.com>
Date: Tue, 23 Sep 2025 10:39:25 +0530
From: Neeraj Upadhyay <Neeraj.Upadhyay@....com>
To: <kvm@...r.kernel.org>, <seanjc@...gle.com>, <pbonzini@...hat.com>
CC: <linux-kernel@...r.kernel.org>, <Thomas.Lendacky@....com>,
	<nikunj@....com>, <Santosh.Shukla@....com>, <Vasant.Hegde@....com>,
	<Suravee.Suthikulpanit@....com>, <bp@...en8.de>, <David.Kaplan@....com>,
	<huibo.wang@....com>, <naveen.rao@....com>, <pgonda@...gle.com>,
	<linux-kselftest@...r.kernel.org>, <shuah@...nel.org>, <tiala@...rosoft.com>
Subject: [RFC PATCH v2 18/35] KVM: selftests: Add compilation for instruction decoder library

The x86 instruction decoder library (insn-eval.c) has been adapted for
selftests, but it is not yet compiled and linked into the KVM
selftest binaries.

Update Makefile.kvm to build the instruction decoder and its
dependencies, making them available to x86 KVM selftests.

With these changes, the instruction decoder library is fully integrated
into the selftest build process and can be used for decoding
instructions for emulating MMIO accesses for SEV-ES guests.

Signed-off-by: Neeraj Upadhyay <Neeraj.Upadhyay@....com>
---
 tools/testing/selftests/kvm/Makefile.kvm | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/tools/testing/selftests/kvm/Makefile.kvm b/tools/testing/selftests/kvm/Makefile.kvm
index 6dd8675b4861..41aa99e5e0c4 100644
--- a/tools/testing/selftests/kvm/Makefile.kvm
+++ b/tools/testing/selftests/kvm/Makefile.kvm
@@ -22,6 +22,7 @@ LIBKVM_STRING += lib/string_override.c
 LIBKVM_x86 += lib/x86/apic.c
 LIBKVM_x86 += lib/x86/handlers.S
 LIBKVM_x86 += lib/x86/hyperv.c
+LIBKVM_x86 += lib/x86/insn-eval.c
 LIBKVM_x86 += lib/x86/memstress.c
 LIBKVM_x86 += lib/x86/pmu.c
 LIBKVM_x86 += lib/x86/processor.c
@@ -249,6 +250,15 @@ ifeq ($(ARCH),x86)
 ifeq ($(shell echo "void foo(void) { }" | $(CC) -march=x86-64-v2 -x c - -c -o /dev/null 2>/dev/null; echo "$$?"),0)
 	CFLAGS += -march=x86-64-v2
 endif
+tools_lib_dir := $(top_srcdir)/tools/arch/x86/lib
+inat_tables_script = $(top_srcdir)/tools/arch/x86/tools/gen-insn-attr-x86.awk
+inat_tables_maps = $(top_srcdir)/tools/arch/x86/lib/x86-opcode-map.txt
+$(shell awk -f $(inat_tables_script) $(inat_tables_maps) > $(tools_lib_dir)/inat-tables.c)
+LIBKVM_x86 += $(tools_lib_dir)/insn.c
+LIBKVM_x86 += $(tools_lib_dir)/inat.c
+EXTRA_CLEAN += $(tools_lib_dir)/inat-tables.c
+EXTRA_CLEAN += $(tools_lib_dir)/insn.o
+EXTRA_CLEAN += $(tools_lib_dir)/inat.o
 endif
 ifeq ($(ARCH),arm64)
 tools_dir := $(top_srcdir)/tools
-- 
2.34.1