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envelope-from=steven.sistare@oracle.com; helo=mx0b-00069f02.pphosted.com X-Spam_score_int: -27 X-Spam_score: -2.8 X-Spam_bar: -- X-Spam_report: (-2.8 / 5.0 requ) BAYES_00=-1.9, 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_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org On 8/16/2024 1:57 PM, Fabiano Rosas wrote: > Steve Sistare writes: > >> Remember the RAMBlock host address as host_old during migration, for use >> by CPR. The iommufd interface to update the virtual address of DMA >> mappings requires it. >> >> Signed-off-by: Steve Sistare >> --- >> hw/core/machine.c | 6 ++++++ >> include/exec/ramblock.h | 1 + >> migration/migration.h | 2 ++ >> migration/options.c | 2 ++ >> migration/ram.c | 7 +++++++ >> 5 files changed, 18 insertions(+) >> >> diff --git a/hw/core/machine.c b/hw/core/machine.c >> index 9676953..0ac16b8 100644 >> --- a/hw/core/machine.c >> +++ b/hw/core/machine.c >> @@ -35,6 +35,12 @@ >> #include "hw/virtio/virtio-iommu.h" >> #include "audio/audio.h" >> >> +/* TBD: register hw_compat_9_1 with machines */ >> +GlobalProperty hw_compat_9_1[] = { >> + { "migration", "send-host-old", "off"}, >> +}; >> +const size_t hw_compat_9_1_len = G_N_ELEMENTS(hw_compat_9_1); >> + >> GlobalProperty hw_compat_9_0[] = { >> {"arm-cpu", "backcompat-cntfrq", "true" }, >> {"scsi-disk-base", "migrate-emulated-scsi-request", "false" }, >> diff --git a/include/exec/ramblock.h b/include/exec/ramblock.h >> index 64484cd..8f1c535 100644 >> --- a/include/exec/ramblock.h >> +++ b/include/exec/ramblock.h >> @@ -28,6 +28,7 @@ struct RAMBlock { >> struct rcu_head rcu; >> struct MemoryRegion *mr; >> uint8_t *host; >> + uint64_t host_old; >> uint8_t *colo_cache; /* For colo, VM's ram cache */ >> ram_addr_t offset; >> ram_addr_t used_length; >> diff --git a/migration/migration.h b/migration/migration.h >> index 38aa140..b5e3151 100644 >> --- a/migration/migration.h >> +++ b/migration/migration.h >> @@ -442,6 +442,8 @@ struct MigrationState { >> */ >> uint8_t clear_bitmap_shift; >> >> + bool send_host_old; >> + >> /* >> * This save hostname when out-going migration starts >> */ >> diff --git a/migration/options.c b/migration/options.c >> index 7526f9f..197cb86 100644 >> --- a/migration/options.c >> +++ b/migration/options.c >> @@ -92,6 +92,8 @@ Property migration_properties[] = { >> clear_bitmap_shift, CLEAR_BITMAP_SHIFT_DEFAULT), >> DEFINE_PROP_BOOL("x-preempt-pre-7-2", MigrationState, >> preempt_pre_7_2, false), >> + DEFINE_PROP_BOOL("send-host-old", MigrationState, >> + send_host_old, true), >> >> /* Migration parameters */ >> DEFINE_PROP_UINT8("x-throttle-trigger-threshold", MigrationState, >> diff --git a/migration/ram.c b/migration/ram.c >> index 1e1e05e..8644917 100644 >> --- a/migration/ram.c >> +++ b/migration/ram.c >> @@ -3030,6 +3030,9 @@ static int ram_save_setup(QEMUFile *f, void *opaque, Error **errp) >> qemu_put_byte(f, strlen(block->idstr)); >> qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr)); >> qemu_put_be64(f, block->used_length); >> + if (migrate_get_current()->send_host_old) { >> + qemu_put_be64(f, (uint64_t)block->host); >> + } > > This requires an update of scripts/analyze-migration.py. Could be done > on the side. Indeed. Thanks. - Steve >> if (migrate_postcopy_ram() && >> block->page_size != max_hg_page_size) { >> qemu_put_be64(f, block->page_size); >> @@ -4021,6 +4024,10 @@ static int parse_ramblock(QEMUFile *f, RAMBlock *block, ram_addr_t length) >> >> assert(block); >> >> + if (migrate_get_current()->send_host_old) { >> + block->host_old = qemu_get_be64(f); >> + } >> + >> if (migrate_mapped_ram()) { >> parse_ramblock_mapped_ram(f, block, length, &local_err); >> if (local_err) {