boards: Add qemu_x86_nokpti target

Adds a build target to run tests on qemu_x86 with KPTI disabled.

Signed-off-by: Lauren Murphy <lauren.murphy@intel.com>

boards/x86/qemu_x86/qemu_x86_nokpti.dts

@@ -0,0 +1,7 @@
+/*
+ * Copyright (c) 2020 Intel Corporation
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#include "qemu_x86.dts"

boards/x86/qemu_x86/qemu_x86_nokpti.yaml

@@ -0,0 +1,13 @@
+identifier: qemu_x86_nokpti
+name: QEMU Emulation for X86 (KPTI disabled)
+type: qemu
+arch: x86
+simulation: qemu
+toolchain:
+  - zephyr
+  - xtools
+testing:
+  default: true
+  only_tags:
+     - kernel
+     - userspace

boards/x86/qemu_x86/qemu_x86_nokpti_defconfig

@@ -0,0 +1,21 @@
+# SPDX-License-Identifier: Apache-2.0
+
+CONFIG_SOC_IA32=y
+CONFIG_BOARD_QEMU_X86=y
+CONFIG_HPET_TIMER=y
+CONFIG_PIC_DISABLE=y
+CONFIG_LOAPIC=y
+CONFIG_CONSOLE=y
+CONFIG_SERIAL=y
+CONFIG_UART_NS16550=y
+CONFIG_UART_CONSOLE=y
+CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=25000000
+CONFIG_TEST_RANDOM_GENERATOR=y
+CONFIG_X86_MMU=y
+CONFIG_X86_MMU_PAGE_POOL_PAGES=15
+CONFIG_DEBUG_INFO=y
+CONFIG_SCHED_SCALABLE=y
+CONFIG_WAITQ_SCALABLE=y
+CONFIG_X86_VERY_EARLY_CONSOLE=y
+CONFIG_QEMU_ICOUNT_SHIFT=5
+CONFIG_X86_KPTI=n