diff options
| author | Marc Zyngier <maz@kernel.org> | 2020-05-28 14:12:59 +0100 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-05-28 17:29:13 +0100 |
| commit | fe677be989146b8a8c0f26fe626c6567c4cd3837 (patch) | |
| tree | 4fc7d4444661b6485b78fce9964dd8c0ca6c99a4 /arch/arm64/include/asm/kvm_mmu.h | |
| parent | 02ab1f5018c3ad0b8677e797b5d3333d2e3b7f20 (diff) | |
KVM: arm64: Move __load_guest_stage2 to kvm_mmu.h
Having __load_guest_stage2 in kvm_hyp.h is quickly going to trigger
a circular include problem. In order to avoid this, let's move
it to kvm_mmu.h, where it will be a better fit anyway.
In the process, drop the __hyp_text annotation, which doesn't help
as the function is marked as __always_inline.
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/include/asm/kvm_mmu.h')
| -rw-r--r-- | arch/arm64/include/asm/kvm_mmu.h | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_mmu.h b/arch/arm64/include/asm/kvm_mmu.h index 30b0e8d6b895..1abe58bbbf13 100644 --- a/arch/arm64/include/asm/kvm_mmu.h +++ b/arch/arm64/include/asm/kvm_mmu.h @@ -604,5 +604,22 @@ static __always_inline u64 kvm_get_vttbr(struct kvm *kvm) return kvm_phys_to_vttbr(baddr) | vmid_field | cnp; } +/* + * Must be called from hyp code running at EL2 with an updated VTTBR + * and interrupts disabled. + */ +static __always_inline void __load_guest_stage2(struct kvm *kvm) +{ + write_sysreg(kvm->arch.vtcr, vtcr_el2); + write_sysreg(kvm_get_vttbr(kvm), vttbr_el2); + + /* + * ARM errata 1165522 and 1530923 require the actual execution of the + * above before we can switch to the EL1/EL0 translation regime used by + * the guest. + */ + asm(ALTERNATIVE("nop", "isb", ARM64_WORKAROUND_SPECULATIVE_AT)); +} + #endif /* __ASSEMBLY__ */ #endif /* __ARM64_KVM_MMU_H__ */ |