Huacai Chen f93f67d06b LoongArch: Improve hardware page table walker ... LoongArch has similar problems explained in commit 7f0b1bf045 ("arm64: Fix barriers used for page table modifications"), when hardware page table walker (PTW) enabled, speculative accesses may cause spurious page fault in kernel space. Theoretically, in order to completely avoid spurious page fault we need a "dbar + ibar" pair between the page table modifications and the subsequent memory accesses using the corresponding virtual address. But "ibar" is too heavy for performace, so we only use a "dbar 0b11000" in set_pte(). And let spurious_fault() filter the rest rare spurious page faults which should be avoided by "ibar". Besides, we replace the llsc loop with amo in set_pte() which has better performace, and refactor mmu_context.h to 1) avoid any load/store/branch instructions between the writing of CSR.ASID & CSR.PGDL, 2) ensure flush tlb operation is after updating ASID. Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>		2024-09-24 15:32:20 +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	LoongArch: Improve hardware page table walker	2024-09-24 15:32:20 +08:00
kernel	LoongArch: Rework CPU feature probe from CPUCFG/IOCSR	2024-09-24 15:32:20 +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: Improve hardware page table walker	2024-09-24 15:32:20 +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: Add ARCH_HAS_SET_DIRECT_MAP support	2024-09-24 15:32:20 +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