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KVM: arm64: Use kvm_arch for stage 2 pgtable

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In order to make use of the stage 2 pgtable code for the host stage 2,
use struct kvm_arch in lieu of struct kvm as the host will have the
former but not the latter.

Acked-by: Will Deacon <will@kernel.org>
Signed-off-by: Quentin Perret <qperret@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20210319100146.1149909-20-qperret@google.com
This commit is contained in:
Quentin Perret 2021-03-19 10:01:27 +00:00 committed by Marc Zyngier
parent bfa79a8054
commit 834cd93deb
3 changed files with 7 additions and 6 deletions
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5
arch/arm64/include/asm/kvm_pgtable.h
View File

@ -162,12 +162,13 @@ int kvm_pgtable_hyp_map(struct kvm_pgtable *pgt, u64 addr, u64 size, u64 phys,
/**
* kvm_pgtable_stage2_init() - Initialise a guest stage-2 page-table.
* @pgt: Uninitialised page-table structure to initialise.
* @kvm: KVM structure representing the guest virtual machine.
* @arch: Arch-specific KVM structure representing the guest virtual
* machine.
* @mm_ops: Memory management callbacks.
*
* Return: 0 on success, negative error code on failure.
*/
int kvm_pgtable_stage2_init(struct kvm_pgtable *pgt, struct kvm *kvm,
int kvm_pgtable_stage2_init(struct kvm_pgtable *pgt, struct kvm_arch *arch,
struct kvm_pgtable_mm_ops *mm_ops);
/**

6
arch/arm64/kvm/hyp/pgtable.c
View File

@ -880,11 +880,11 @@ int kvm_pgtable_stage2_flush(struct kvm_pgtable *pgt, u64 addr, u64 size)
return kvm_pgtable_walk(pgt, addr, size, &walker);
}
int kvm_pgtable_stage2_init(struct kvm_pgtable *pgt, struct kvm *kvm,
int kvm_pgtable_stage2_init(struct kvm_pgtable *pgt, struct kvm_arch *arch,
struct kvm_pgtable_mm_ops *mm_ops)
{
size_t pgd_sz;
u64 vtcr = kvm->arch.vtcr;
u64 vtcr = arch->vtcr;
u32 ia_bits = VTCR_EL2_IPA(vtcr);
u32 sl0 = FIELD_GET(VTCR_EL2_SL0_MASK, vtcr);
u32 start_level = VTCR_EL2_TGRAN_SL0_BASE - sl0;
@ -897,7 +897,7 @@ int kvm_pgtable_stage2_init(struct kvm_pgtable *pgt, struct kvm *kvm,
pgt->ia_bits = ia_bits;
pgt->start_level = start_level;
pgt->mm_ops = mm_ops;
pgt->mmu = &kvm->arch.mmu;
pgt->mmu = &arch->mmu;
/* Ensure zeroed PGD pages are visible to the hardware walker */
dsb(ishst);

2
arch/arm64/kvm/mmu.c
View File

@ -457,7 +457,7 @@ int kvm_init_stage2_mmu(struct kvm *kvm, struct kvm_s2_mmu *mmu)
if (!pgt)
return -ENOMEM;
err = kvm_pgtable_stage2_init(pgt, kvm, &kvm_s2_mm_ops);
err = kvm_pgtable_stage2_init(pgt, &kvm->arch, &kvm_s2_mm_ops);
if (err)
goto out_free_pgtable;