kvm_phys_addr_ioremap() unconditionally empties out the memcache pages for the current vCPU on return. This causes subsequent topups to allocate fresh pages and is at odds with the behaviour when mapping memory in user_mem_abort().
Remove the call to kvm_mmu_free_memory_cache() from kvm_phys_addr_ioremap(), allowing the cached pages to be used by a later mapping. Cc: Marc Zyngier <[email protected]> Cc: Quentin Perret <[email protected]> Signed-off-by: Will Deacon <[email protected]> --- arch/arm64/kvm/mmu.c | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index 662b0c99a63d..4a24ebdc6fc6 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -1489,19 +1489,17 @@ int kvm_phys_addr_ioremap(struct kvm *kvm, phys_addr_t guest_ipa, ret = kvm_mmu_topup_memory_cache(&cache, kvm_mmu_cache_min_pages(kvm)); if (ret) - goto out; + break; spin_lock(&kvm->mmu_lock); ret = stage2_set_pte(&kvm->arch.mmu, &cache, addr, &pte, KVM_S2PTE_FLAG_IS_IOMAP); spin_unlock(&kvm->mmu_lock); if (ret) - goto out; + break; pfn++; } -out: - kvm_mmu_free_memory_cache(&cache); return ret; } -- 2.28.0.220.ged08abb693-goog _______________________________________________ kvmarm mailing list [email protected] https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
