Re: [PATCH V2] KVM: arm64: Restrict IPA size to maximum 48 bits on 4K and 16K page size
From: Marc Zyngier <maz@kernel.org>
Date: 2021-08-11 15:02:51
Also in:
kvmarm, lkml
On Wed, 11 Aug 2021 16:41:15 +0530, Anshuman Khandual wrote:
Even though ID_AA64MMFR0.PARANGE reports 52 bit PA size support, it cannot
be enabled as guest IPA size on 4K or 16K page size configurations. Hence
kvm_ipa_limit must be restricted to 48 bits. This change achieves required
IPA capping.
Before the commit c9b69a0cf0b4 ("KVM: arm64: Don't constrain maximum IPA
size based on host configuration"), the problem here would have been just
latent via PHYS_MASK_SHIFT (which earlier in turn capped kvm_ipa_limit),
which remains capped at 48 bits on 4K and 16K configs.
Applied to next, thanks!
[1/1] KVM: arm64: Restrict IPA size to maximum 48 bits on 4K and 16K page size
commit: 5e5df9571c319fb107d7a523cc96fcc99961ee70
Cheers,
M.
--
Without deviation from the norm, progress is not possible.
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