diff --git a/arch/x86/core/ia32.cmake b/arch/x86/core/ia32.cmake
index f9a2a7018e3..48207011b50 100644
--- a/arch/x86/core/ia32.cmake
+++ b/arch/x86/core/ia32.cmake
@@ -1,7 +1,8 @@
 # Copyright (c) 2019 Intel Corp.
 # SPDX-License-Identifier: Apache-2.0
 
-if (CMAKE_C_COMPILER_ID STREQUAL "Clang")
+if (CMAKE_C_COMPILER_ID STREQUAL "Clang"
+  OR CMAKE_C_COMPILER_ID STREQUAL "IntelLLVM")
   # We rely on GAS for assembling, so don't use the integrated assembler
   zephyr_compile_options($<$<COMPILE_LANGUAGE:ASM>:-no-integrated-as>)
 elseif(CMAKE_C_COMPILER_ID STREQUAL "GNU")
diff --git a/arch/x86/ia32.cmake b/arch/x86/ia32.cmake
index 6f718215456..ee2c7a7f01e 100644
--- a/arch/x86/ia32.cmake
+++ b/arch/x86/ia32.cmake
@@ -12,7 +12,8 @@ endif()
 set_property(GLOBAL PROPERTY PROPERTY_OUTPUT_ARCH "i386")
 set_property(GLOBAL PROPERTY PROPERTY_OUTPUT_FORMAT "elf32-i386")
 
-if(CMAKE_C_COMPILER_ID STREQUAL "Clang")
+if(CMAKE_C_COMPILER_ID STREQUAL "Clang"
+  OR CMAKE_C_COMPILER_ID STREQUAL "IntelLLVM")
   zephyr_compile_options(-Qunused-arguments)
 
   zephyr_cc_option(
diff --git a/cmake/app/boilerplate.cmake b/cmake/app/boilerplate.cmake
index 1bd4f699ef3..4ae701b15b9 100644
--- a/cmake/app/boilerplate.cmake
+++ b/cmake/app/boilerplate.cmake
@@ -609,6 +609,11 @@ endif()
 include(${ZEPHYR_BASE}/cmake/target_toolchain.cmake)
 
 project(Zephyr-Kernel VERSION ${PROJECT_VERSION})
+
+# Add .S file extension suffix into CMAKE_ASM_SOURCE_FILE_EXTENSIONS,
+# because clang from OneApi can't recongnize them as asm files on
+# windows now.
+list(APPEND CMAKE_ASM_SOURCE_FILE_EXTENSIONS "S")
 enable_language(C CXX ASM)
 # The setup / configuration of the toolchain itself and the configuration of
 # supported compilation flags are now split, as this allows to use the toolchain
diff --git a/cmake/bintools/oneApi/target.cmake b/cmake/bintools/oneApi/target.cmake
index 3abe5e813e0..4b69900f068 100644
--- a/cmake/bintools/oneApi/target.cmake
+++ b/cmake/bintools/oneApi/target.cmake
@@ -7,7 +7,10 @@ endif()
 
 find_program(CMAKE_AR      llvm-ar      ${find_program_clang_args}   )
 find_program(CMAKE_NM      llvm-nm      ${find_program_clang_args}   )
-find_program(CMAKE_OBJDUMP llvm-objdump ${find_program_clang_args}   )
+# In OneApi installation directory on Windows, there is no llvm-objdump
+# binary, so would better use objdump from system environment both
+# on Linux and Windows.
+find_program(CMAKE_OBJDUMP objdump      ${find_program_binutils_args})
 find_program(CMAKE_RANLIB  llvm-ranlib  ${find_program_clang_args}   )
 find_program(CMAKE_OBJCOPY llvm-objcopy ${find_program_binutils_args})
 find_program(CMAKE_READELF readelf      ${find_program_binutils_args})