From patchwork Tue Oct 2 16:52:24 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anthony PERARD X-Patchwork-Id: 188583 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id AE9B82C009A for ; Wed, 3 Oct 2012 02:56:27 +1000 (EST) Received: from localhost ([::1]:60881 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TJ5iw-0005Yi-Qv for incoming@patchwork.ozlabs.org; Tue, 02 Oct 2012 12:53:34 -0400 Received: from eggs.gnu.org ([208.118.235.92]:39530) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TJ5iC-0003lJ-O2 for qemu-devel@nongnu.org; Tue, 02 Oct 2012 12:52:54 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1TJ5i7-0002sw-1w for qemu-devel@nongnu.org; Tue, 02 Oct 2012 12:52:48 -0400 Received: from smtp.citrix.com ([66.165.176.89]:10381) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1TJ5i6-0002sP-Tl for qemu-devel@nongnu.org; Tue, 02 Oct 2012 12:52:42 -0400 X-IronPort-AV: E=Sophos;i="4.80,524,1344211200"; d="scan'208";a="39891640" Received: from ftlpmailmx02.citrite.net ([10.13.107.66]) by FTLPIPO01.CITRIX.COM with ESMTP/TLS/RC4-MD5; 02 Oct 2012 16:52:41 +0000 Received: from ukmail1.uk.xensource.com (10.80.16.128) by smtprelay.citrix.com (10.13.107.66) with Microsoft SMTP Server id 8.3.279.1; Tue, 2 Oct 2012 12:52:41 -0400 Received: from [10.80.3.61] (helo=perard.uk.xensource.com) by ukmail1.uk.xensource.com with esmtp (Exim 4.69) (envelope-from ) id 1TJ5i5-0002u1-DK; Tue, 02 Oct 2012 17:52:41 +0100 From: Anthony PERARD To: QEMU-devel , Stefano Stabellini , Avi Kivity Date: Tue, 2 Oct 2012 17:52:24 +0100 Message-ID: <1349196747-30410-3-git-send-email-anthony.perard@citrix.com> X-Mailer: git-send-email 1.7.12.2 In-Reply-To: <1349196747-30410-1-git-send-email-anthony.perard@citrix.com> References: <1349196747-30410-1-git-send-email-anthony.perard@citrix.com> MIME-Version: 1.0 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 66.165.176.89 Cc: Anthony PERARD , Xen Devel Subject: [Qemu-devel] [PATCH V5 2/5] xen: Introduce xen_modified_memory. X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org This function is to be used during live migration. Every write access to the guest memory should call this funcion so the Xen tools knows which pages are dirty. Signed-off-by: Anthony PERARD Acked-by: Stefano Stabellini --- hw/xen.h | 1 + xen-all.c | 21 +++++++++++++++++++++ xen-stub.c | 4 ++++ 3 files changed, 26 insertions(+) diff --git a/hw/xen.h b/hw/xen.h index e5926b7..d14e92d 100644 --- a/hw/xen.h +++ b/hw/xen.h @@ -48,6 +48,7 @@ void xenstore_store_pv_console_info(int i, struct CharDriverState *chr); struct MemoryRegion; void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size, struct MemoryRegion *mr); +void xen_modified_memory(ram_addr_t start, ram_addr_t length); #endif struct MemoryRegion; diff --git a/xen-all.c b/xen-all.c index f75ae9f..b11542c 100644 --- a/xen-all.c +++ b/xen-all.c @@ -1228,3 +1228,24 @@ void xen_shutdown_fatal_error(const char *fmt, ...) /* destroy the domain */ qemu_system_shutdown_request(); } + +void xen_modified_memory(ram_addr_t start, ram_addr_t length) +{ + if (unlikely(xen_in_migration)) { + int rc; + ram_addr_t start_pfn, nb_pages; + + if (length == 0) { + length = TARGET_PAGE_SIZE; + } + start_pfn = start >> TARGET_PAGE_BITS; + nb_pages = ((start + length + TARGET_PAGE_SIZE - 1) >> TARGET_PAGE_BITS) + - start_pfn; + rc = xc_hvm_modified_memory(xen_xc, xen_domid, start_pfn, nb_pages); + if (rc) { + fprintf(stderr, + "%s failed for "RAM_ADDR_FMT" ("RAM_ADDR_FMT"): %i, %s\n", + __func__, start, nb_pages, rc, strerror(-rc)); + } + } +} diff --git a/xen-stub.c b/xen-stub.c index 5e66ba8..9214392 100644 --- a/xen-stub.c +++ b/xen-stub.c @@ -59,3 +59,7 @@ void xen_register_framebuffer(MemoryRegion *mr) void qmp_xen_set_global_dirty_log(bool enable, Error **errp) { } + +void xen_modified_memory(ram_addr_t start, ram_addr_t length) +{ +}