Tiezhu Yang e8dd556c74 LoongArch: Enable generic CPU vulnerabilites support ... Currently, many architectures support generic CPU vulnerabilites, such as x86, arm64 and riscv: commit 61dc0f555b ("x86/cpu: Implement CPU vulnerabilites sysfs functions") commit 61ae1321f0 ("arm64: enable generic CPU vulnerabilites support") commit 0e3f3649d4 ("riscv: Enable generic CPU vulnerabilites support") All LoongArch CPUs (since Loongson-3A5000) implement a special mechanism in the processor core to prevent "Meltdown" and "Spectre" attacks, so it can enable generic CPU vulnerabilites support for LoongArch too. Without this patch, there are no user interfaces of vulnerabilities to check on LoongArch. The output of those files reflects the state of the CPUs in the system, the output value "Not affected" means "CPU is not affected by the vulnerability". Before: # cat /sys/devices/system/cpu/vulnerabilities/spec_rstack_overflow cat: /sys/devices/system/cpu/vulnerabilities/spec_rstack_overflow: No such file or directory # cat /sys/devices/system/cpu/vulnerabilities/spec_store_bypass cat: /sys/devices/system/cpu/vulnerabilities/spec_store_bypass: No such file or directory # cat /sys/devices/system/cpu/vulnerabilities/meltdown cat: /sys/devices/system/cpu/vulnerabilities/meltdown: No such file or directory After: # cat /sys/devices/system/cpu/vulnerabilities/spec_rstack_overflow Not affected # cat /sys/devices/system/cpu/vulnerabilities/spec_store_bypass Not affected # cat /sys/devices/system/cpu/vulnerabilities/meltdown Not affected Link: https://www.loongson.cn/EN/news/show?id=633 Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>		2024-09-24 15:31:51 +08:00
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boot	LoongArch: Fix GMAC's phy-mode definitions in dts	2024-06-03 15:45:53 +08:00
configs	LoongArch changes for v6.10	2024-05-22 09:43:07 -07:00
crypto	LoongArch/crypto: Clean up useless assignment operations	2024-03-19 15:50:34 +08:00
include	Merge tag 'irq-core-2024-09-16' into loongarch-next	2024-09-17 22:20:12 +08:00
kernel	LoongArch: Remove STACK_FRAME_NON_STANDARD(do_syscall)	2024-09-17 22:23:10 +08:00
kvm	LoongArch: KVM: Invalidate guest steal time address on vCPU reset	2024-08-26 23:11:32 +08:00
lib	LoongArch: Select ARCH_SUPPORTS_INT128 if CC_HAS_INT128	2024-05-14 12:24:18 +08:00
mm	LoongArch: Use accessors to page table entries instead of direct dereference	2024-08-07 17:37:11 +08:00
net	bpf: Take return from set_memory_rox() into account with bpf_jit_binary_lock_ro()	2024-03-14 19:28:52 -07:00
pci	LoongArch: Add FDT booting support from efi system table	2022-12-14 08:41:53 +08:00
power	LoongArch: Add ACPI standard hardware register based S3 support	2024-07-20 22:41:06 +08:00
vdso	Makefile: remove redundant tool coverage variables	2024-05-14 23:35:48 +09:00
Kbuild	LoongArch: Allow device trees be built into the kernel	2024-01-17 12:43:00 +08:00
Kconfig	LoongArch: Enable generic CPU vulnerabilites support	2024-09-24 15:31:51 +08:00
Kconfig.debug	LoongArch: Only allow OBJTOOL & ORC unwinder if toolchain supports -mthin-add-sub	2024-06-21 10:18:40 +08:00
Makefile	LoongArch: Use rustc option -Zdirect-access-external-data	2024-07-20 22:41:07 +08:00