diff options
| -rw-r--r-- | arch/arm/kvm/mmu.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/arm/kvm/mmu.c b/arch/arm/kvm/mmu.c index 0b36dd52af62..8a0aa37605c5 100644 --- a/arch/arm/kvm/mmu.c +++ b/arch/arm/kvm/mmu.c @@ -1709,6 +1709,21 @@ int kvm_mmu_init(void) */ BUG_ON((hyp_idmap_start ^ (hyp_idmap_end - 1)) & PAGE_MASK); + kvm_info("IDMAP page: %lx\n", hyp_idmap_start); + kvm_info("HYP VA range: %lx:%lx\n", + KERN_TO_HYP(PAGE_OFFSET), KERN_TO_HYP(~0UL)); + + if (hyp_idmap_start >= KERN_TO_HYP(PAGE_OFFSET) && + hyp_idmap_start < KERN_TO_HYP(~0UL)) { + /* + * The idmap page is intersecting with the VA space, + * it is not safe to continue further. + */ + kvm_err("IDMAP intersecting with HYP VA, unable to continue\n"); + err = -EINVAL; + goto out; + } + hyp_pgd = (pgd_t *)__get_free_pages(GFP_KERNEL | __GFP_ZERO, hyp_pgd_order); if (!hyp_pgd) { kvm_err("Hyp mode PGD not allocated\n"); |