Sergey Matyukevich 4bd1d80efb riscv: mm: notify remote harts about mmu cache updates ... Current implementation of update_mmu_cache function performs local TLB flush. It does not take into account ASID information. Besides, it does not take into account other harts currently running the same mm context or possible migration of the running context to other harts. Meanwhile TLB flush is not performed for every context switch if ASID support is enabled. Patch [1] proposed to add ASID support to update_mmu_cache to avoid flushing local TLB entirely. This patch takes into account other harts currently running the same mm context as well as possible migration of this context to other harts. For this purpose the approach from flush_icache_mm is reused. Remote harts currently running the same mm context are informed via SBI calls that they need to flush their local TLBs. All the other harts are marked as needing a deferred TLB flush when this mm context runs on them. [1] https://lore.kernel.org/linux-riscv/20220821013926.8968-1-tjytimi@163.com/ Signed-off-by: Sergey Matyukevich <sergey.matyukevich@syntacore.com> Fixes: 65d4b9c530 ("RISC-V: Implement ASID allocator") Cc: stable@vger.kernel.org Link: https://lore.kernel.org/linux-riscv/20220829205219.283543-1-geomatsi@gmail.com/#t Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>		2022-12-08 15:18:16 -08:00
..
boot	RISC-V Patches for the 6.1 Merge Window, Part 2	2022-10-14 11:21:11 -07:00
configs	RISC-V: defconfig: Enable CONFIG_SERIAL_8250_DW	2022-12-02 10:24:13 -08:00
errata	drivers/perf: riscv_pmu_sbi: add support for PMU variant on T-Head C9xx cores	2022-10-27 14:35:20 -07:00
include	riscv: mm: notify remote harts about mmu cache updates	2022-12-08 15:18:16 -08:00
kernel	riscv: stacktrace: Make walk_stackframe cross pt_regs frame	2022-12-05 18:13:34 -08:00
kvm	The first batch of KVM patches, mostly covering x86, which I	2022-10-09 09:39:55 -07:00
lib	riscv: lib: uaccess: fix CSR_STATUS SR_SUM bit	2022-08-10 14:06:31 -07:00
mm	riscv: mm: notify remote harts about mmu cache updates	2022-12-08 15:18:16 -08:00
net	bpf, riscv: Support riscv jit to provide bpf_line_info	2022-06-02 16:26:01 -07:00
purgatory	riscv/purgatory: Omit use of bin2c	2022-08-11 09:32:34 -07:00
Kbuild	riscv: move errata/ and kvm/ builds to arch/riscv/Kbuild	2022-06-01 22:26:32 -07:00
Kconfig	riscv: add riscv rethook implementation	2022-12-02 13:04:05 -08:00
Kconfig.debug
Kconfig.erratas	drivers/perf: riscv_pmu_sbi: add support for PMU variant on T-Head C9xx cores	2022-10-27 14:35:20 -07:00
Kconfig.socs	riscv: Kconfig: Style cleanups	2022-06-30 19:26:16 -07:00
Makefile	RISC-V Patches for the 6.1 Merge Window, Part 2	2022-10-14 11:21:11 -07:00