| # x86 general configuration options |
| |
| # Copyright (c) 2014-2015 Wind River Systems, Inc. |
| # SPDX-License-Identifier: Apache-2.0 |
| |
| menu "X86 Architecture Options" |
| depends on X86 |
| |
| config ARCH |
| default "x86" |
| |
| # |
| # CPU Families - the SoC configuration should select the right one. |
| # |
| |
| config CPU_ATOM |
| bool # hidden |
| select CPU_HAS_FPU |
| select ARCH_HAS_STACK_PROTECTION if X86_MMU && !X86_64 |
| select ARCH_HAS_USERSPACE if X86_MMU && !X86_64 |
| help |
| This option signifies the use of a CPU from the Atom family. |
| |
| config CPU_MINUTEIA |
| bool # hidden |
| select ARCH_HAS_STACK_PROTECTION if X86_MMU && !X86_64 |
| select ARCH_HAS_USERSPACE if X86_MMU && !X86_64 |
| help |
| This option signifies the use of a CPU from the Minute IA family. |
| |
| config CPU_APOLLO_LAKE |
| bool # hidden |
| select CPU_HAS_FPU |
| select ARCH_HAS_STACK_PROTECTION if X86_MMU && !X86_64 |
| select ARCH_HAS_USERSPACE if X86_MMU && !X86_64 |
| help |
| This option signifies the use of a CPU from the Apollo Lake family. |
| |
| # |
| # Configuration common to both IA32 and Intel64 sub-architectures. |
| # |
| |
| config X86_64 |
| bool |
| prompt "Run in 64-bit mode" |
| default n |
| select 64BIT |
| select USE_SWITCH |
| select USE_SWITCH_SUPPORTED |
| select SCHED_IPI_SUPPORTED |
| |
| config MAX_IRQ_LINES |
| int "Number of IRQ lines" |
| default 128 |
| range 0 224 |
| help |
| This option specifies the number of IRQ lines in the system. It |
| determines the size of the _irq_to_interrupt_vector_table, which |
| is used to track the association between vectors and IRQ numbers. |
| |
| config IRQ_OFFLOAD_VECTOR |
| int "IDT vector to use for IRQ offload" |
| default 32 |
| range 32 255 |
| depends on IRQ_OFFLOAD |
| |
| config XIP |
| default n |
| |
| config PIC_DISABLE |
| bool "Disable PIC" |
| help |
| This option disables all interrupts on the legacy i8259 PICs at boot. |
| |
| choice |
| prompt "Reboot implementation" |
| depends on REBOOT |
| default REBOOT_RST_CNT |
| |
| config REBOOT_RST_CNT |
| bool "Reboot via RST_CNT register" |
| help |
| Reboot via the RST_CNT register, going back to BIOS. |
| endchoice |
| |
| config ACPI |
| bool "ACPI (Advanced Configuration and Power Interface) support" |
| default n |
| help |
| Allow retrieval of platform configuration at runtime. |
| |
| config X86_MEMMAP_ENTRIES |
| int "Number of memory map entries" |
| range 1 256 |
| default 1 if !MULTIBOOT_MEMMAP |
| default 64 if MULTIBOOT_MEMMAP |
| help |
| Maximum number of memory regions to hold in the memory map. |
| |
| config MULTIBOOT |
| bool "Generate multiboot header" |
| default y |
| help |
| Embed a multiboot header in the output executable. This is used |
| by some boot loaders (e.g., GRUB) when loading Zephyr. It is safe |
| to leave this option on if you're not sure. It only expands the |
| text segment by 12-16 bytes and is typically ignored if not needed. |
| |
| if MULTIBOOT |
| |
| config MULTIBOOT_INFO |
| bool "Preserve multiboot information structure" |
| default n |
| help |
| Multiboot passes a pointer to an information structure to the |
| kernel entry point. Some drivers (e.g., the multiboot framebuffer |
| display driver) need to refer to information in this structure, |
| and so set this option to preserve the data in a permanent location. |
| |
| config MULTIBOOT_MEMMAP |
| bool "Use multiboot memory map if provided" |
| default n |
| select MULTIBOOT_INFO |
| help |
| Use the multiboot memory map if the loader provides one. |
| |
| config MULTIBOOT_FRAMEBUF |
| bool "Multiboot framebuffer support" |
| default n |
| select DISPLAY |
| select FRAMEBUF_DISPLAY |
| select MULTIBOOT_INFO |
| |
| if MULTIBOOT_FRAMEBUF |
| |
| config MULTIBOOT_FRAMEBUF_X |
| int "Multiboot framebuffer X pixels" |
| default 640 |
| |
| config MULTIBOOT_FRAMEBUF_Y |
| int "Multiboot framebuffer Y pixels" |
| default 480 |
| |
| endif # MULTIBOOT_FRAMEBUF |
| |
| endif # MULTIBOOT |
| |
| config X86_VERY_EARLY_CONSOLE |
| bool "Support very early boot printk" |
| depends on PRINTK |
| help |
| Non-emulated X86 devices often require special hardware to attach |
| a debugger, which may not be easily available. This option adds a |
| very minimal serial driver which gets initialized at the very |
| beginning of z_cstart(), via z_arch_kernel_init(). This driver enables |
| printk to emit messages to the 16550 UART port 0 instance in device |
| tree. This mini-driver assumes I/O to the UART is done via ports. |
| |
| config X86_MMU |
| bool "Enable Memory Management Unit" |
| select MEMORY_PROTECTION |
| depends on MP_NUM_CPUS = 1 # FIXME: Working through SMP issues |
| help |
| This options enables the memory management unit present in x86 |
| and creates a set of page tables at boot time that is runtime- |
| mutable. |
| |
| config X86_MMU_PAGE_POOL_PAGES |
| int "Number of pages to reserve for building page tables" |
| default 16 |
| depends on X86_MMU |
| help |
| Building page tables at boot requires a pool of free memory pages |
| to construct it. This can't be derived at build time, tune this |
| to your SoC's specific memory map. |
| |
| config X86_NO_MELTDOWN |
| bool |
| help |
| This hidden option should be set on a per-SOC basis to indicate that |
| a particular SOC is not vulnerable to the Meltdown CPU vulnerability, |
| as described in CVE-2017-5754. |
| |
| config X86_NO_SPECTRE_V1 |
| bool |
| help |
| This hidden option should be set on a per-SOC basis to indicate that |
| a particular SOC is not vulnerable to the Spectre V1, V1.1, and V1.2 |
| CPU vulnerabilities as described in CVE-2017-5753 and CVE-2018-3693. |
| |
| config X86_NO_SPECTRE_V2 |
| bool |
| help |
| This hidden option should be set on a per-SOC basis to indicate that |
| a particular SOC is not vulnerable to the Spectre V2 CPU |
| vulnerability, as described in CVE-2017-5715. |
| |
| config X86_NO_SPECTRE_V4 |
| bool |
| help |
| This hidden option should be set on a per-SOC basis to indicate that |
| a particular SOC is not vulnerable to the Spectre V4 CPU |
| vulnerability, as described in CVE-2018-3639. |
| |
| config X86_NO_LAZY_FP |
| bool |
| help |
| This hidden option should be set on a per-SOC basis to indicate |
| that a particular SOC is not vulnerable to the Lazy FP CPU |
| vulnerability, as described in CVE-2018-3665. |
| |
| config X86_NO_SPECULATIVE_VULNERABILITIES |
| bool |
| select X86_NO_MELTDOWN |
| select X86_NO_SPECTRE_V1 |
| select X86_NO_SPECTRE_V2 |
| select X86_NO_SPECTRE_V4 |
| select X86_NO_LAZY_FP |
| help |
| This hidden option should be set on a per-SOC basis to indicate that |
| a particular SOC does not perform any kind of speculative execution, |
| or is a newer chip which is immune to the class of vulnerabilities |
| which exploit speculative execution side channel attacks. |
| |
| source "arch/x86/core/Kconfig.ia32" |
| source "arch/x86/core/Kconfig.intel64" |
| |
| endmenu |
