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| author | Marc Zyngier <marc.zyngier@arm.com> | 2018-03-12 17:25:10 +0300 |
|---|---|---|
| committer | Marc Zyngier <marc.zyngier@arm.com> | 2018-03-19 16:04:17 +0300 |
| commit | 46fef158f10d255dfe47cf3a0ab5f0965b66b1da (patch) | |
| tree | f4a777adab64a7572f270695ca7d0f9de7948a30 /virt | |
| parent | 1bb32a44aea1fe73c6f84e466a45ae559ef74559 (diff) | |
| download | linux-46fef158f10d255dfe47cf3a0ab5f0965b66b1da.tar.xz | |
KVM: arm/arm64: Fix idmap size and alignment
Although the idmap section of KVM can only be at most 4kB and
must be aligned on a 4kB boundary, the rest of the code expects
it to be page aligned. Things get messy when tearing down the
HYP page tables when PAGE_SIZE is 64K, and the idmap section isn't
64K aligned.
Let's fix this by computing aligned boundaries that the HYP code
will use.
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Reported-by: James Morse <james.morse@arm.com>
Reviewed-by: James Morse <james.morse@arm.com>
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/arm/mmu.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c index 52b0ee31ebee..c41d03a8af93 100644 --- a/virt/kvm/arm/mmu.c +++ b/virt/kvm/arm/mmu.c @@ -1815,7 +1815,9 @@ int kvm_mmu_init(void) int err; hyp_idmap_start = kvm_virt_to_phys(__hyp_idmap_text_start); + hyp_idmap_start = ALIGN_DOWN(hyp_idmap_start, PAGE_SIZE); hyp_idmap_end = kvm_virt_to_phys(__hyp_idmap_text_end); + hyp_idmap_end = ALIGN(hyp_idmap_end, PAGE_SIZE); hyp_idmap_vector = kvm_virt_to_phys(__kvm_hyp_init); /* |