Anup Patel 8c3ce496bd RISC-V: KVM: Don't clear hgatp CSR in kvm_arch_vcpu_put() ... We might have RISC-V systems (such as QEMU) where VMID is not part of the TLB entry tag so these systems will have to flush all TLB entries upon any change in hgatp.VMID. Currently, we zero-out hgatp CSR in kvm_arch_vcpu_put() and we re-program hgatp CSR in kvm_arch_vcpu_load(). For above described systems, this will flush all TLB entries whenever VCPU exits to user-space hence reducing performance. This patch fixes above described performance issue by not clearing hgatp CSR in kvm_arch_vcpu_put(). Fixes: 34bde9d8b9 ("RISC-V: KVM: Implement VCPU world-switch") Cc: stable@vger.kernel.org Signed-off-by: Anup Patel <apatel@ventanamicro.com> Signed-off-by: Anup Patel <anup@brainfault.org>		2022-04-09 09:15:33 +05:30
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boot	RISC-V Patches for the 5.18 Merge Window, Part 2	2022-04-01 13:31:57 -07:00
configs	RISC-V: K210 defconfigs: Drop redundant MEMBARRIER=n	2022-03-31 17:19:27 -07:00
errata	riscv: errata: alternative: mark vendor_patch_func __initdata	2022-01-09 11:02:46 -08:00
include	RISC-V Patches for the 5.18 Merge Window, Part 2	2022-04-01 13:31:57 -07:00
kernel	RISC-V Patches for the 5.18 Merge Window, Part 2	2022-04-01 13:31:57 -07:00
kvm	RISC-V: KVM: Don't clear hgatp CSR in kvm_arch_vcpu_put()	2022-04-09 09:15:33 +05:30
lib	riscv: Fixed misaligned memory access. Fixed pointer comparison.	2022-03-10 10:24:04 -08:00
mm	RISC-V Patches for the 5.18 Merge Window, Part 1	2022-03-25 10:11:38 -07:00
net	riscv: bpf: Fix eBPF's exception tables	2022-01-19 10:50:02 -08:00
Kbuild	kbuild: use more subdir- for visiting subdirectories while cleaning	2021-10-24 13:49:46 +09:00
Kconfig	RISC-V CPU Idle Support	2022-03-30 16:17:54 -07:00
Kconfig.debug	RISC-V: Remove EARLY_PRINTK support	2018-12-17 10:23:46 -08:00
Kconfig.erratas	riscv: alternative only works on !XIP_KERNEL	2022-03-10 10:05:19 -08:00
Kconfig.socs	RISC-V CPU Idle Support	2022-03-30 16:17:54 -07:00
Makefile	riscv: fix build with binutils 2.38	2022-02-10 09:17:01 -08:00