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LoongArch: KVM: Remove PGD saving during VM context switch

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PGD table for primary mmu keeps unchanged once VM is created, it is not
necessary to save PGD table pointer during VM context switch. And it can
be acquired when VM is created.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
This commit is contained in:
Bibo Mao
2025-03-18 16:48:08 +08:00
committed by Huacai Chen
parent 1c405b4217
commit 062ac0cb83
4 changed files with 15 additions and 10 deletions
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9
arch/loongarch/kvm/vcpu.c
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@@ -1462,6 +1462,15 @@ int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
hrtimer_init(&vcpu->arch.swtimer, CLOCK_MONOTONIC, HRTIMER_MODE_ABS_PINNED_HARD);
vcpu->arch.swtimer.function = kvm_swtimer_wakeup;
/* Get GPA (=HVA) of PGD for kvm hypervisor */
vcpu->arch.kvm_pgd = __pa(vcpu->kvm->arch.pgd);
/*
* Get PGD for primary mmu, virtual address is used since there is
* memory access after loading from CSR_PGD in tlb exception fast path.
*/
vcpu->arch.host_pgd = (unsigned long)vcpu->kvm->mm->pgd;
vcpu->arch.handle_exit = kvm_handle_exit;
vcpu->arch.guest_eentry = (unsigned long)kvm_loongarch_ops->exc_entry;
vcpu->arch.csr = kzalloc(sizeof(struct loongarch_csrs), GFP_KERNEL);