diff mbox series

[v12,17/31] LoongArch: KVM: Implement virtual machine tlb operations

Message ID 20230530015223.147755-18-zhaotianrui@loongson.cn
State New
Headers
Series Add KVM LoongArch support |

Commit Message

zhaotianrui May 30, 2023, 1:52 a.m. UTC 
  Implement LoongArch virtual machine tlb operations such as flush tlb by
specific gpa parameter and flush all of the virt machines tlb.

Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn>
---
 arch/loongarch/kvm/tlb.c | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 arch/loongarch/kvm/tlb.c

Comments

maobibo June 6, 2023, 1:20 a.m. UTC | #1 
Reviewed-by: Bibo, Mao <maobibo@loongson.cn>

在 2023/5/30 09:52, Tianrui Zhao 写道:
> Implement LoongArch virtual machine tlb operations such as flush tlb by
> specific gpa parameter and flush all of the virt machines tlb.
> 
> Signed-off-by: Tianrui Zhao <zhaotianrui@loongson.cn>
> ---
>  arch/loongarch/kvm/tlb.c | 31 +++++++++++++++++++++++++++++++
>  1 file changed, 31 insertions(+)
>  create mode 100644 arch/loongarch/kvm/tlb.c
> 
> diff --git a/arch/loongarch/kvm/tlb.c b/arch/loongarch/kvm/tlb.c
> new file mode 100644
> index 000000000000..66e116cf2486
> --- /dev/null
> +++ b/arch/loongarch/kvm/tlb.c
> @@ -0,0 +1,31 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
> + */
> +
> +#include <linux/kvm_host.h>
> +#include <asm/tlb.h>
> +
> +int kvm_flush_tlb_gpa(struct kvm_vcpu *vcpu, unsigned long gpa)
> +{
> +	preempt_disable();
> +	gpa &= (PAGE_MASK << 1);
> +	invtlb(INVTLB_GID_ADDR, read_csr_gstat() & CSR_GSTAT_GID, gpa);
> +	preempt_enable();
> +	return 0;
> +}
> +
> +/**
> + * 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);
> +}
diff mbox series

Patch

diff --git a/arch/loongarch/kvm/tlb.c b/arch/loongarch/kvm/tlb.c
new file mode 100644
index 000000000000..66e116cf2486
--- /dev/null
+++ b/arch/loongarch/kvm/tlb.c
@@ -0,0 +1,31 @@ 
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2020-2023 Loongson Technology Corporation Limited
+ */
+
+#include <linux/kvm_host.h>
+#include <asm/tlb.h>
+
+int kvm_flush_tlb_gpa(struct kvm_vcpu *vcpu, unsigned long gpa)
+{
+	preempt_disable();
+	gpa &= (PAGE_MASK << 1);
+	invtlb(INVTLB_GID_ADDR, read_csr_gstat() & CSR_GSTAT_GID, gpa);
+	preempt_enable();
+	return 0;
+}
+
+/**
+ * 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);
+}