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author | Tianrui Zhao <zhaotianrui@loongson.cn> | 2023-10-02 05:01:28 +0300 |
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committer | Huacai Chen <chenhuacai@loongson.cn> | 2023-10-02 05:01:28 +0300 |
commit | d7f4ed4b22908077bd219dd172b27b51927aff6d (patch) | |
tree | caca6c66bd318c716e934ef054f847b36153e8be /arch/loongarch/kvm/tlb.c | |
parent | a5857b9ff6e06cac4adc8d671a74b7739a88623e (diff) | |
download | linux-d7f4ed4b22908077bd219dd172b27b51927aff6d.tar.xz |
LoongArch: KVM: Implement virtual machine tlb operations
Implement LoongArch virtual machine tlb operations such as flush tlb by
specific gpa parameter and flush all of the virtual machine's tlbs.
Reviewed-by: Bibo Mao <maobibo@loongson.cn>
Tested-by: Huacai Chen <chenhuacai@loongson.cn>
Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/kvm/tlb.c')
-rw-r--r-- | arch/loongarch/kvm/tlb.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/arch/loongarch/kvm/tlb.c b/arch/loongarch/kvm/tlb.c new file mode 100644 index 000000000000..02535df6b51f --- /dev/null +++ b/arch/loongarch/kvm/tlb.c @@ -0,0 +1,32 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2020-2023 Loongson Technology Corporation Limited + */ + +#include <linux/kvm_host.h> +#include <asm/tlb.h> +#include <asm/kvm_csr.h> + +/* + * kvm_flush_tlb_all() - Flush all root TLB entries for guests. + * + * Invalidate all entries including GVA-->GPA and GPA-->HPA mappings. + */ +void kvm_flush_tlb_all(void) +{ + unsigned long flags; + + local_irq_save(flags); + invtlb_all(INVTLB_ALLGID, 0, 0); + local_irq_restore(flags); +} + +void kvm_flush_tlb_gpa(struct kvm_vcpu *vcpu, unsigned long gpa) +{ + unsigned long flags; + + local_irq_save(flags); + gpa &= (PAGE_MASK << 1); + invtlb(INVTLB_GID_ADDR, read_csr_gstat() & CSR_GSTAT_GID, gpa); + local_irq_restore(flags); +} |