On 9/19/23 05:31, David Stevens wrote: > On Mon, Sep 18, 2023 at 6:58 PM Dmitry Osipenko > <dmitry.osipenko@xxxxxxxxxxxxx> wrote: >> >> On 9/11/23 05:16, David Stevens wrote: >>> From: David Stevens <stevensd@xxxxxxxxxxxx> >>> >>> Handle non-refcounted pages in __kvm_faultin_pfn. This allows the host >>> to map memory into the guest that is backed by non-refcounted struct >>> pages - for example, the tail pages of higher order non-compound pages >>> allocated by the amdgpu driver via ttm_pool_alloc_page. >>> >>> The bulk of this change is tracking the is_refcounted_page flag so that >>> non-refcounted pages don't trigger page_count() == 0 warnings. This is >>> done by storing the flag in an unused bit in the sptes. There are no >>> bits available in PAE SPTEs, so non-refcounted pages can only be handled >>> on TDP and x86-64. >>> >>> Signed-off-by: David Stevens <stevensd@xxxxxxxxxxxx> >>> --- >>> arch/x86/kvm/mmu/mmu.c | 52 +++++++++++++++++++++++---------- >>> arch/x86/kvm/mmu/mmu_internal.h | 1 + >>> arch/x86/kvm/mmu/paging_tmpl.h | 8 +++-- >>> arch/x86/kvm/mmu/spte.c | 4 ++- >>> arch/x86/kvm/mmu/spte.h | 12 +++++++- >>> arch/x86/kvm/mmu/tdp_mmu.c | 22 ++++++++------ >>> include/linux/kvm_host.h | 3 ++ >>> virt/kvm/kvm_main.c | 6 ++-- >>> 8 files changed, 76 insertions(+), 32 deletions(-) >> >> Could you please tell which kernel tree you used for the base of this >> series? This patch #6 doesn't apply cleanly to stable/mainline/next/kvm >> >> error: sha1 information is lacking or useless (arch/x86/kvm/mmu/mmu.c). >> error: could not build fake ancestor > > This series is based on the kvm next branch (i.e. > https://git.kernel.org/pub/scm/virt/kvm/kvm.git/log/?h=next). The > specific hash is d011151616e73de20c139580b73fa4c7042bd861. Thanks, this tag works -- Best regards, Dmitry
