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bh=H1RFMHMot9VQRi+TCvM+qcYlf4xdQtuq7It4W5NtbRk=; b=I9i+KzLZrH0KDgAkpqCwXxalSASpa4WejkCQA1UJp4Fk8ANnWZAkS5rhqcai3T+xA38QIH ZaL2MYO4cyEeUac/1mEXZx8WNwqN4OGmHJN7MRkfGg4+DWYuJ3nu4QdAN6Av/GhQ6intlK zKkmgCMtc3wubXmfS1IfFWF1Mw8LMvA= X-MC-Unique: bDmRWCmCOEuX92QTf74-bg-1 Subject: [PULL 09/10] vfio: Support host translation granule size From: Alex Williamson To: qemu-devel@nongnu.org Date: Tue, 16 Mar 2021 11:07:39 -0600 Message-ID: <161591445947.135549.1776902921629998180.stgit@rhel8vm.home.shazbot.org> In-Reply-To: <161591414009.135549.5804863877511053803.stgit@rhel8vm.home.shazbot.org> References: <161591414009.135549.5804863877511053803.stgit@rhel8vm.home.shazbot.org> User-Agent: StGit/0.23 MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.23 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=alex.williamson@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=216.205.24.124; envelope-from=alex.williamson@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -29 X-Spam_score: -3.0 X-Spam_bar: --- X-Spam_report: (-3.0 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.25, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Kunkun Jiang Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: pass (identity @redhat.com) From: Kunkun Jiang The cpu_physical_memory_set_dirty_lebitmap() can quickly deal with the dirty pages of memory by bitmap-traveling, regardless of whether the bitmap is aligned correctly or not. cpu_physical_memory_set_dirty_lebitmap() supports pages in bitmap of host page size. So it'd better to set bitmap_pgsize to host page size to support more translation granule sizes. [aw: The Fixes commit below introduced code to restrict migration support to configurations where the target page size intersects the host dirty page support. For example, a 4K guest on a 4K host. Due to the above flexibility in bitmap handling, this restriction unnecessarily prevents mixed target/host pages size that could otherwise be supported. Use host page size for dirty bitmap.] Fixes: 87ea529c502 ("vfio: Get migration capability flags for container") Signed-off-by: Kunkun Jiang Message-Id: <20210304133446.1521-1-jiangkunkun@huawei.com> Signed-off-by: Alex Williamson --- hw/vfio/common.c | 48 +++++++++++++++++++++++++----------------------- 1 file changed, 25 insertions(+), 23 deletions(-) diff --git a/hw/vfio/common.c b/hw/vfio/common.c index 35a41fd05251..ad08dfd729b9 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -378,7 +378,7 @@ static int vfio_dma_unmap_bitmap(VFIOContainer *contain= er, { struct vfio_iommu_type1_dma_unmap *unmap; struct vfio_bitmap *bitmap; - uint64_t pages =3D TARGET_PAGE_ALIGN(size) >> TARGET_PAGE_BITS; + uint64_t pages =3D REAL_HOST_PAGE_ALIGN(size) / qemu_real_host_page_si= ze; int ret; =20 unmap =3D g_malloc0(sizeof(*unmap) + sizeof(*bitmap)); @@ -390,12 +390,12 @@ static int vfio_dma_unmap_bitmap(VFIOContainer *conta= iner, bitmap =3D (struct vfio_bitmap *)&unmap->data; =20 /* - * cpu_physical_memory_set_dirty_lebitmap() expects pages in bitmap of - * TARGET_PAGE_SIZE to mark those dirty. Hence set bitmap_pgsize to - * TARGET_PAGE_SIZE. + * cpu_physical_memory_set_dirty_lebitmap() supports pages in bitmap of + * qemu_real_host_page_size to mark those dirty. Hence set bitmap_pgsi= ze + * to qemu_real_host_page_size. */ =20 - bitmap->pgsize =3D TARGET_PAGE_SIZE; + bitmap->pgsize =3D qemu_real_host_page_size; bitmap->size =3D ROUND_UP(pages, sizeof(__u64) * BITS_PER_BYTE) / BITS_PER_BYTE; =20 @@ -674,16 +674,17 @@ static void vfio_listener_region_add(MemoryListener *= listener, return; } =20 - if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK= ) !=3D - (section->offset_within_region & ~TARGET_PAGE_MASK))) { + if (unlikely((section->offset_within_address_space & + ~qemu_real_host_page_mask) !=3D + (section->offset_within_region & ~qemu_real_host_page_mas= k))) { error_report("%s received unaligned region", __func__); return; } =20 - iova =3D TARGET_PAGE_ALIGN(section->offset_within_address_space); + iova =3D REAL_HOST_PAGE_ALIGN(section->offset_within_address_space); llend =3D int128_make64(section->offset_within_address_space); llend =3D int128_add(llend, section->size); - llend =3D int128_and(llend, int128_exts64(TARGET_PAGE_MASK)); + llend =3D int128_and(llend, int128_exts64(qemu_real_host_page_mask)); =20 if (int128_ge(int128_make64(iova), llend)) { return; @@ -892,8 +893,9 @@ static void vfio_listener_region_del(MemoryListener *li= stener, return; } =20 - if (unlikely((section->offset_within_address_space & ~TARGET_PAGE_MASK= ) !=3D - (section->offset_within_region & ~TARGET_PAGE_MASK))) { + if (unlikely((section->offset_within_address_space & + ~qemu_real_host_page_mask) !=3D + (section->offset_within_region & ~qemu_real_host_page_mas= k))) { error_report("%s received unaligned region", __func__); return; } @@ -921,10 +923,10 @@ static void vfio_listener_region_del(MemoryListener *= listener, */ } =20 - iova =3D TARGET_PAGE_ALIGN(section->offset_within_address_space); + iova =3D REAL_HOST_PAGE_ALIGN(section->offset_within_address_space); llend =3D int128_make64(section->offset_within_address_space); llend =3D int128_add(llend, section->size); - llend =3D int128_and(llend, int128_exts64(TARGET_PAGE_MASK)); + llend =3D int128_and(llend, int128_exts64(qemu_real_host_page_mask)); =20 if (int128_ge(int128_make64(iova), llend)) { return; @@ -1004,13 +1006,13 @@ static int vfio_get_dirty_bitmap(VFIOContainer *con= tainer, uint64_t iova, range->size =3D size; =20 /* - * cpu_physical_memory_set_dirty_lebitmap() expects pages in bitmap of - * TARGET_PAGE_SIZE to mark those dirty. Hence set bitmap's pgsize to - * TARGET_PAGE_SIZE. + * cpu_physical_memory_set_dirty_lebitmap() supports pages in bitmap of + * qemu_real_host_page_size to mark those dirty. Hence set bitmap's pg= size + * to qemu_real_host_page_size. */ - range->bitmap.pgsize =3D TARGET_PAGE_SIZE; + range->bitmap.pgsize =3D qemu_real_host_page_size; =20 - pages =3D TARGET_PAGE_ALIGN(range->size) >> TARGET_PAGE_BITS; + pages =3D REAL_HOST_PAGE_ALIGN(range->size) / qemu_real_host_page_size; range->bitmap.size =3D ROUND_UP(pages, sizeof(__u64) * BITS_PER_BYTE) / BITS_PER_BYTE; range->bitmap.data =3D g_try_malloc0(range->bitmap.size); @@ -1114,8 +1116,8 @@ static int vfio_sync_dirty_bitmap(VFIOContainer *cont= ainer, section->offset_within_region; =20 return vfio_get_dirty_bitmap(container, - TARGET_PAGE_ALIGN(section->offset_within_address_sp= ace), - int128_get64(section->size), ram_addr); + REAL_HOST_PAGE_ALIGN(section->offset_within_address_spa= ce), + int128_get64(section->size), ram_addr); } =20 static void vfio_listener_log_sync(MemoryListener *listener, @@ -1655,10 +1657,10 @@ static void vfio_get_iommu_info_migration(VFIOConta= iner *container, header); =20 /* - * cpu_physical_memory_set_dirty_lebitmap() expects pages in bitmap of - * TARGET_PAGE_SIZE to mark those dirty. + * cpu_physical_memory_set_dirty_lebitmap() supports pages in bitmap of + * qemu_real_host_page_size to mark those dirty. */ - if (cap_mig->pgsize_bitmap & TARGET_PAGE_SIZE) { + if (cap_mig->pgsize_bitmap & qemu_real_host_page_size) { container->dirty_pages_supported =3D true; container->max_dirty_bitmap_size =3D cap_mig->max_dirty_bitmap_siz= e; container->dirty_pgsizes =3D cap_mig->pgsize_bitmap;