6.6-stable review patch. If anyone has any objections, please let me know.
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From: Greg Kroah-Hartman gregkh@linuxfoundation.org
This reverts commit ba3cf83f4a5063edb6ee150633e641954ce30478 which is commit 419cfb983ca93e75e905794521afefcfa07988bb upstream.
It should not have been applied.
Link: https://lore.kernel.org/r/CABgObfb5U9zwTQBPkPB=mKu-vMrRspPCm4wfxoQpB+SyAnb5W... Reported-by: Paolo Bonzini pbonzini@redhat.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/powerpc/kvm/e500_mmu_host.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-)
--- a/arch/powerpc/kvm/e500_mmu_host.c +++ b/arch/powerpc/kvm/e500_mmu_host.c @@ -322,7 +322,6 @@ static inline int kvmppc_e500_shadow_map { struct kvm_memory_slot *slot; unsigned long pfn = 0; /* silence GCC warning */ - struct page *page = NULL; unsigned long hva; int pfnmap = 0; int tsize = BOOK3E_PAGESZ_4K; @@ -444,7 +443,7 @@ static inline int kvmppc_e500_shadow_map
if (likely(!pfnmap)) { tsize_pages = 1UL << (tsize + 10 - PAGE_SHIFT); - pfn = __kvm_faultin_pfn(slot, gfn, FOLL_WRITE, NULL, &page); + pfn = gfn_to_pfn_memslot(slot, gfn); if (is_error_noslot_pfn(pfn)) { if (printk_ratelimit()) pr_err("%s: real page not found for gfn %lx\n", @@ -489,6 +488,8 @@ static inline int kvmppc_e500_shadow_map } } writable = kvmppc_e500_ref_setup(ref, gtlbe, pfn, wimg); + if (writable) + kvm_set_pfn_dirty(pfn);
kvmppc_e500_setup_stlbe(&vcpu_e500->vcpu, gtlbe, tsize, ref, gvaddr, stlbe); @@ -497,7 +498,8 @@ static inline int kvmppc_e500_shadow_map kvmppc_mmu_flush_icache(pfn);
out: - kvm_release_faultin_page(kvm, page, !!ret, writable); + /* Drop refcount on page, so that mmu notifiers can clear it */ + kvm_release_pfn_clean(pfn); spin_unlock(&kvm->mmu_lock); return ret; }