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GET /api/1.0/patches/2197728/?format=api
{ "id": 2197728, "url": "http://patchwork.ozlabs.org/api/1.0/patches/2197728/?format=api", "project": { "id": 14, "url": "http://patchwork.ozlabs.org/api/1.0/projects/14/?format=api", "name": "QEMU Development", "link_name": "qemu-devel", "list_id": "qemu-devel.nongnu.org", "list_email": "qemu-devel@nongnu.org", "web_url": "", "scm_url": "", "webscm_url": "" }, "msgid": "<20260218114233.266178-5-anisinha@redhat.com>", "date": "2026-02-18T11:41:57", "name": "[v5,04/34] system/physmem: add helper to reattach existing memory after KVM VM fd change", "commit_ref": null, "pull_url": null, "state": "new", "archived": false, "hash": "9aeb1509bc3ef147ec4d000dc8fcc1791abd343b", "submitter": { "id": 86030, "url": "http://patchwork.ozlabs.org/api/1.0/people/86030/?format=api", "name": "Ani Sinha", "email": "anisinha@redhat.com" }, "delegate": null, "mbox": "http://patchwork.ozlabs.org/project/qemu-devel/patch/20260218114233.266178-5-anisinha@redhat.com/mbox/", "series": [ { "id": 492541, "url": "http://patchwork.ozlabs.org/api/1.0/series/492541/?format=api", "date": "2026-02-18T11:41:56", "name": "Introduce support for confidential guest reset (x86)", "version": 5, "mbox": "http://patchwork.ozlabs.org/series/492541/mbox/" } ], "check": "pending", "checks": "http://patchwork.ozlabs.org/api/patches/2197728/checks/", "tags": {}, "headers": { "Return-Path": "<qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org>", "X-Original-To": "incoming@patchwork.ozlabs.org", "Delivered-To": "patchwork-incoming@legolas.ozlabs.org", "Authentication-Results": [ "legolas.ozlabs.org;\n\tdkim=pass (1024-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=mimecast20190719 header.b=V8jLMq64;\n\tdkim=pass (2048-bit key;\n unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256\n header.s=google header.b=r/Dnfs5E;\n\tdkim-atps=neutral", "legolas.ozlabs.org;\n spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org\n (client-ip=209.51.188.17; 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This change adds a helper function ram_block_rebind()\nfor this purpose. The next patch will make use of this function.\n\nSigned-off-by: Ani Sinha <anisinha@redhat.com>\n---\n include/system/physmem.h | 1 +\n system/physmem.c | 28 ++++++++++++++++++++++++++++\n 2 files changed, 29 insertions(+)", "diff": "diff --git a/include/system/physmem.h b/include/system/physmem.h\nindex 7bb7d3e154..da91b77bd9 100644\n--- a/include/system/physmem.h\n+++ b/include/system/physmem.h\n@@ -51,5 +51,6 @@ physical_memory_snapshot_and_clear_dirty(MemoryRegion *mr, hwaddr offset,\n bool physical_memory_snapshot_get_dirty(DirtyBitmapSnapshot *snap,\n ram_addr_t start,\n ram_addr_t length);\n+int ram_block_rebind(Error **errp);\n \n #endif\ndiff --git a/system/physmem.c b/system/physmem.c\nindex 2fb0c25c93..e5ff26acec 100644\n--- a/system/physmem.c\n+++ b/system/physmem.c\n@@ -2826,6 +2826,34 @@ found:\n return block;\n }\n \n+/*\n+ * Creates new guest memfd for the ramblocks and closes the\n+ * existing memfd.\n+ */\n+int ram_block_rebind(Error **errp)\n+{\n+ RAMBlock *block;\n+\n+ qemu_mutex_lock_ramlist();\n+\n+ RAMBLOCK_FOREACH(block) {\n+ if (block->flags & RAM_GUEST_MEMFD) {\n+ if (block->guest_memfd >= 0) {\n+ close(block->guest_memfd);\n+ }\n+ block->guest_memfd = kvm_create_guest_memfd(block->max_length,\n+ 0, errp);\n+ if (block->guest_memfd < 0) {\n+ qemu_mutex_unlock_ramlist();\n+ return -1;\n+ }\n+\n+ }\n+ }\n+ qemu_mutex_unlock_ramlist();\n+ return 0;\n+}\n+\n /*\n * Finds the named RAMBlock\n *\n", "prefixes": [ "v5", "04/34" ] }