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| author |   Bibo Mao <maobibo@loongson.cn> | 2025-05-20 20:20:18 +0800 |
|---|---|---|
| committer |   Huacai Chen <chenhuacai@loongson.cn> | 2025-05-20 20:20:18 +0800 |
| commit | 05d70ebf74c9383a0a7eddc0d866efece7039b8c (patch) | |
| tree | 9e788dda33ecab01c5e0daf8d61e6ba8c12716b3 /arch/loongarch/kvm/exit.c | |
| parent | LoongArch: KVM: Add ecode parameter for exception handlers (diff) | |
| download | wireguard-linux-05d70ebf74c9383a0a7eddc0d866efece7039b8c.tar.xz wireguard-linux-05d70ebf74c9383a0a7eddc0d866efece7039b8c.zip | |
LoongArch: KVM: Do not flush tlb if HW PTW supported
With HW PTW supported, invalid TLB is not added when page fault happens.
But for EXCCODE_TLBM exception, stale TLB may exist because of the last
read access. Thus TLB flush operation is necessary for the EXCCODE_TLBM
exception, but not necessary for other tyeps of page fault exceptions.
With SW PTW supported, invalid TLB is added in the TLB refill exception.
TLB flush operation is necessary for all types of page fault exceptions.
Here remove unnecessary TLB flush opereation with HW PTW supported.
Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/kvm/exit.c')
| -rw-r--r-- | arch/loongarch/kvm/exit.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/arch/loongarch/kvm/exit.c b/arch/loongarch/kvm/exit.c index e143fa3d21d4..fa52251b3bf1 100644 --- a/arch/loongarch/kvm/exit.c +++ b/arch/loongarch/kvm/exit.c @@ -661,7 +661,7 @@ int kvm_emu_mmio_write(struct kvm_vcpu *vcpu, larch_inst inst) return ret; } -static int kvm_handle_rdwr_fault(struct kvm_vcpu *vcpu, bool write) +static int kvm_handle_rdwr_fault(struct kvm_vcpu *vcpu, bool write, int ecode) { int ret; larch_inst inst; @@ -675,7 +675,7 @@ static int kvm_handle_rdwr_fault(struct kvm_vcpu *vcpu, bool write) return RESUME_GUEST; } - ret = kvm_handle_mm_fault(vcpu, badv, write); + ret = kvm_handle_mm_fault(vcpu, badv, write, ecode); if (ret) { /* Treat as MMIO */ inst.word = vcpu->arch.badi; @@ -707,12 +707,12 @@ static int kvm_handle_rdwr_fault(struct kvm_vcpu *vcpu, bool write) static int kvm_handle_read_fault(struct kvm_vcpu *vcpu, int ecode) { - return kvm_handle_rdwr_fault(vcpu, false); + return kvm_handle_rdwr_fault(vcpu, false, ecode); } static int kvm_handle_write_fault(struct kvm_vcpu *vcpu, int ecode) { - return kvm_handle_rdwr_fault(vcpu, true); + return kvm_handle_rdwr_fault(vcpu, true, ecode); } int kvm_complete_user_service(struct kvm_vcpu *vcpu, struct kvm_run *run) |