From xen-api-bounces@lists.xen.org Thu Jan 19 19:59:12 2017 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Thu, 19 Jan 2017 19:59:12 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cUIrD-0001pB-1b; Thu, 19 Jan 2017 19:58:51 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cUIrB-0001p5-U7 for xen-api@lists.xen.org; Thu, 19 Jan 2017 19:58:50 +0000 Received: from [85.158.139.211] by server-13.bemta-5.messagelabs.com id 26/38-18129-97A11885; Thu, 19 Jan 2017 19:58:49 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrJIsWRWlGSWpSXmKPExsVyMfTqZt0KqcY Igys3ZCyOz9rH4sDocXT3b6YAxijWzLyk/IoE1oz3J3pZCtazVsw4Yt/AeJyli5GLQ0hgAqPE 2VWLGEEcFoE7LBLHX18By0gI/GCRuPf6L3MXIyeQkyPR+PkNaxcjB5BdJHH0sA1ImFdAUOLkz CcsILaQgLdE35r1jCAlbAJqElv/2oGEWQRUJc4ffg4W5hUIkDi5ng8kLCzgJTHv9XF2EFtEQF Li/qkbrCA2M1D8xbYvjBMYeWchWTALSWoW0CRmAXWJ9fOEIMJqEre3XWVfwMiyilGjOLWoLLV I19BSL6koMz2jJDcxM0fX0MBULze1uDgxPTUnMalYLzk/dxMjMNDqGRgYdzA+6vc7xCjJwaQk yrv7Y0OEEF9SfkplRmJxRnxRaU5q8SFGGQ4OJQneAMnGCCHBotT01Iq0zBxgyMOkJTh4lER4r 4OkeYsLEnOLM9MhUqcY7Tl6uk6/ZOL4svMMkDz16QKQ3LPr8ksmIZa8/LxUKXHeGSBtAiBtGa V5cENhMXqJUVZKmJeRgYFBiKcgtSg3swRV/hWjOAejkjDvNwmgKTyZeSVwu18BncUEdJaVcj3 IWSWJCCmpBsbgrLm/pz6+/Ob6B4bMEyevVti5fk6Zt33hRMUrrjJSJzcpXb78ePr5nY6Be5ZN Cy6a1qPotWfflLNnyqTUKg09mPMM5i5eZB22h3tR7eMqkxytxybBUivX6ey+XRnYmKVx839EP 7tLkupqrvrdvBLVlrP7avJszis9mXj1/Yy77xcz/c1jvfBBiaU4I9FQi7moOBEAKN+bQMwCAA A= X-Env-Sender: michrozis@gmail.com X-Msg-Ref: server-3.tower-206.messagelabs.com!1484855927!77220878!1 X-Originating-IP: [209.85.213.179] X-SpamReason: No, hits=1.2 required=7.0 tests=HTML_10_20,HTML_MESSAGE, RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 9.1.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 29265 invoked from network); 19 Jan 2017 19:58:48 -0000 Received: from mail-yb0-f179.google.com (HELO mail-yb0-f179.google.com) (209.85.213.179) by server-3.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 19 Jan 2017 19:58:48 -0000 Received: by mail-yb0-f179.google.com with SMTP id 123so33729886ybe.3 for ; Thu, 19 Jan 2017 11:58:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=ZFL2lK9enSC/AnDMOdo6QiPokltJEwbyFRnpcm5utU8=; b=blAcAjNRoCowYjiqg75FQYyAJ3+CleM44unCRsu0YaSkKUhNc1ReFEForPbyANZw1Q 6DiSLL6BDrAhLCGwtM3Ssec1hwWjU37n3M3xxNX9vAiAhYMGKMbPChvBNIlCFWCCilDh TDJ8rd4rwiDheXaTCT64+imVbYfpTmMfRwGR/YnOZB3YpJFf+yG7wNQtyFp8eMFmgTvc rD37QNf4tHntdfO/43rgUJERXBv9GWrN2L/5By0uPfc+NSNta40HGqP9id+mrmNCNSUL cGHjU4ZVfvkaKbXOIVWmG/4UKgYAtsFlK23MLV1n2d6W8cjPrixMLPam8WCBMaHdpCGS Sbvw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=ZFL2lK9enSC/AnDMOdo6QiPokltJEwbyFRnpcm5utU8=; b=nnvTzKvMmQ6sJrhamzUzZynDvaRgRqtTeectQoyQmspoo0bAFewpfR1FzhGMhyA2MV 5R+Sn/522kdLN/vdK/O15/lZdlng9+uSul1MWhFVi9s4j4gnLykSZ2u643aQBzlm7KLu sNAQTkWW4w5ze/2FFNecZVO728Bt8KMa8csFAdQ1If8/0/2B3mun+5sW+O9XWgWQQDCl h4JMIdKv6T8sqzUWr9PxnjD4c/sjRwjJepo2hRf/e0RPlxYojztFbG2/Rtdp3xpJCQkx 1OkIGobeW+SL/kW9zNVSRvFTZyfE8OWfN78JQxF7kl+koUSIQbZ+OlNdObYm+S1+UJ0V B9Yg== X-Gm-Message-State: AIkVDXJyBj2w7BQm1e00NS4dpTZro3RnP0j0mNIFD1+YYjrEPHhzOLkYx3Xerz7fz8SK02EztXPJeZdGbOfm0g== X-Received: by 10.237.40.39 with SMTP id r36mr9547802qtd.282.1484855927222; Thu, 19 Jan 2017 11:58:47 -0800 (PST) MIME-Version: 1.0 Received: by 10.12.170.220 with HTTP; Thu, 19 Jan 2017 11:58:46 -0800 (PST) From: Michalis R Date: Thu, 19 Jan 2017 21:58:46 +0200 Message-ID: To: xen-api@lists.xen.org Subject: [Xen-API] local domid of PV guest inside its kernel (prefered) or userspace X-BeenThere: xen-api@lists.xen.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: User and development list for XCP and XAPI List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============2903031212259041849==" Errors-To: xen-api-bounces@lists.xen.org Sender: "Xen-api" --===============2903031212259041849== Content-Type: multipart/alternative; boundary=001a11487ff415c0b3054677f647 --001a11487ff415c0b3054677f647 Content-Type: text/plain; charset=UTF-8 Hi Is there any way to get the domid of the running PV Guest? For example if from dom0 I have created a guest with domain id 42, I need to get this domid number (not hardwired) either in guest userspace or guest kernel. Thanks --001a11487ff415c0b3054677f647 Content-Type: text/html; charset=UTF-8 
Hi
Is there any way to get the domid of the running PV Guest?
For example if from dom0 I have created a guest with domain id 42, I
need to get this domid number (not hardwired) either in guest userspace or guest kernel.

Thanks
--001a11487ff415c0b3054677f647-- --===============2903031212259041849== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWFwaSBt YWlsaW5nIGxpc3QKWGVuLWFwaUBsaXN0cy54ZW4ub3JnCmh0dHBzOi8vbGlzdHMueGVuLm9yZy9j Z2ktYmluL21haWxtYW4vbGlzdGluZm8veGVuLWFwaQo= --===============2903031212259041849==-- From xen-api-bounces@lists.xen.org Thu Jan 19 19:59:12 2017 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Thu, 19 Jan 2017 19:59:12 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cUIrD-0001pB-1b; Thu, 19 Jan 2017 19:58:51 +0000 Received: from mail6.bemta5.messagelabs.com ([195.245.231.135]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cUIrB-0001p5-U7 for xen-api@lists.xen.org; Thu, 19 Jan 2017 19:58:50 +0000 Received: from [85.158.139.211] by server-13.bemta-5.messagelabs.com id 26/38-18129-97A11885; Thu, 19 Jan 2017 19:58:49 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrJIsWRWlGSWpSXmKPExsVyMfTqZt0KqcY Igys3ZCyOz9rH4sDocXT3b6YAxijWzLyk/IoE1oz3J3pZCtazVsw4Yt/AeJyli5GLQ0hgAqPE 2VWLGEEcFoE7LBLHX18By0gI/GCRuPf6L3MXIyeQkyPR+PkNaxcjB5BdJHH0sA1ImFdAUOLkz CcsILaQgLdE35r1jCAlbAJqElv/2oGEWQRUJc4ffg4W5hUIkDi5ng8kLCzgJTHv9XF2EFtEQF Li/qkbrCA2M1D8xbYvjBMYeWchWTALSWoW0CRmAXWJ9fOEIMJqEre3XWVfwMiyilGjOLWoLLV I19BSL6koMz2jJDcxM0fX0MBULze1uDgxPTUnMalYLzk/dxMjMNDqGRgYdzA+6vc7xCjJwaQk yrv7Y0OEEF9SfkplRmJxRnxRaU5q8SFGGQ4OJQneAMnGCCHBotT01Iq0zBxgyMOkJTh4lER4r 4OkeYsLEnOLM9MhUqcY7Tl6uk6/ZOL4svMMkDz16QKQ3LPr8ksmIZa8/LxUKXHeGSBtAiBtGa V5cENhMXqJUVZKmJeRgYFBiKcgtSg3swRV/hWjOAejkjDvNwmgKTyZeSVwu18BncUEdJaVcj3 IWSWJCCmpBsbgrLm/pz6+/Ob6B4bMEyevVti5fk6Zt33hRMUrrjJSJzcpXb78ePr5nY6Be5ZN Cy6a1qPotWfflLNnyqTUKg09mPMM5i5eZB22h3tR7eMqkxytxybBUivX6ey+XRnYmKVx839EP 7tLkupqrvrdvBLVlrP7avJszis9mXj1/Yy77xcz/c1jvfBBiaU4I9FQi7moOBEAKN+bQMwCAA A= X-Env-Sender: michrozis@gmail.com X-Msg-Ref: server-3.tower-206.messagelabs.com!1484855927!77220878!1 X-Originating-IP: [209.85.213.179] X-SpamReason: No, hits=1.2 required=7.0 tests=HTML_10_20,HTML_MESSAGE, RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 9.1.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 29265 invoked from network); 19 Jan 2017 19:58:48 -0000 Received: from mail-yb0-f179.google.com (HELO mail-yb0-f179.google.com) (209.85.213.179) by server-3.tower-206.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 19 Jan 2017 19:58:48 -0000 Received: by mail-yb0-f179.google.com with SMTP id 123so33729886ybe.3 for ; Thu, 19 Jan 2017 11:58:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=ZFL2lK9enSC/AnDMOdo6QiPokltJEwbyFRnpcm5utU8=; b=blAcAjNRoCowYjiqg75FQYyAJ3+CleM44unCRsu0YaSkKUhNc1ReFEForPbyANZw1Q 6DiSLL6BDrAhLCGwtM3Ssec1hwWjU37n3M3xxNX9vAiAhYMGKMbPChvBNIlCFWCCilDh TDJ8rd4rwiDheXaTCT64+imVbYfpTmMfRwGR/YnOZB3YpJFf+yG7wNQtyFp8eMFmgTvc rD37QNf4tHntdfO/43rgUJERXBv9GWrN2L/5By0uPfc+NSNta40HGqP9id+mrmNCNSUL cGHjU4ZVfvkaKbXOIVWmG/4UKgYAtsFlK23MLV1n2d6W8cjPrixMLPam8WCBMaHdpCGS Sbvw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=ZFL2lK9enSC/AnDMOdo6QiPokltJEwbyFRnpcm5utU8=; b=nnvTzKvMmQ6sJrhamzUzZynDvaRgRqtTeectQoyQmspoo0bAFewpfR1FzhGMhyA2MV 5R+Sn/522kdLN/vdK/O15/lZdlng9+uSul1MWhFVi9s4j4gnLykSZ2u643aQBzlm7KLu sNAQTkWW4w5ze/2FFNecZVO728Bt8KMa8csFAdQ1If8/0/2B3mun+5sW+O9XWgWQQDCl h4JMIdKv6T8sqzUWr9PxnjD4c/sjRwjJepo2hRf/e0RPlxYojztFbG2/Rtdp3xpJCQkx 1OkIGobeW+SL/kW9zNVSRvFTZyfE8OWfN78JQxF7kl+koUSIQbZ+OlNdObYm+S1+UJ0V B9Yg== X-Gm-Message-State: AIkVDXJyBj2w7BQm1e00NS4dpTZro3RnP0j0mNIFD1+YYjrEPHhzOLkYx3Xerz7fz8SK02EztXPJeZdGbOfm0g== X-Received: by 10.237.40.39 with SMTP id r36mr9547802qtd.282.1484855927222; Thu, 19 Jan 2017 11:58:47 -0800 (PST) MIME-Version: 1.0 Received: by 10.12.170.220 with HTTP; Thu, 19 Jan 2017 11:58:46 -0800 (PST) From: Michalis R Date: Thu, 19 Jan 2017 21:58:46 +0200 Message-ID: To: xen-api@lists.xen.org Subject: [Xen-API] local domid of PV guest inside its kernel (prefered) or userspace X-BeenThere: xen-api@lists.xen.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: User and development list for XCP and XAPI List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============2903031212259041849==" Errors-To: xen-api-bounces@lists.xen.org Sender: "Xen-api" --===============2903031212259041849== Content-Type: multipart/alternative; boundary=001a11487ff415c0b3054677f647 --001a11487ff415c0b3054677f647 Content-Type: text/plain; charset=UTF-8 Hi Is there any way to get the domid of the running PV Guest? For example if from dom0 I have created a guest with domain id 42, I need to get this domid number (not hardwired) either in guest userspace or guest kernel. Thanks --001a11487ff415c0b3054677f647 Content-Type: text/html; charset=UTF-8 
Hi
Is there any way to get the domid of the running PV Guest?
For example if from dom0 I have created a guest with domain id 42, I
need to get this domid number (not hardwired) either in guest userspace or guest kernel.

Thanks
--001a11487ff415c0b3054677f647-- --===============2903031212259041849== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWFwaSBt YWlsaW5nIGxpc3QKWGVuLWFwaUBsaXN0cy54ZW4ub3JnCmh0dHBzOi8vbGlzdHMueGVuLm9yZy9j Z2ktYmluL21haWxtYW4vbGlzdGluZm8veGVuLWFwaQo= --===============2903031212259041849==-- From xen-api-bounces@lists.xen.org Fri Jan 20 00:41:06 2017 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Fri, 20 Jan 2017 00:41:06 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cUNGD-0004Ko-OY; Fri, 20 Jan 2017 00:40:57 +0000 Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cUNGD-0004Ki-CN for xen-api@lists.xen.org; Fri, 20 Jan 2017 00:40:57 +0000 Received: from [193.109.254.147] by server-3.bemta-6.messagelabs.com id EC/BC-09053-89C51885; Fri, 20 Jan 2017 00:40:56 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrAIsWRWlGSWpSXmKPExsVyMXThat3pMY0 RBufuKlkcn7WPxYHR4+ju30wBjFGsmXlJ+RUJrBnrd61gK5jGV7G35S1bA2MTTxcjF4eQwARG iRnzpjKDOCwCd1gkbp89AeRwckgI/GCRWNbND2HnSCw//w0qni+x+eMHVhCbV0BQ4uTMJywgt pCAt8SbtT8Yuxg5ONgE1CS2/rUDCbMIqEo0/nzACFEeINH85y9YubCAr8SjJ6+ZQGwRAUmJ+6 dugI1kFvCSmH3xIOsERt5ZSDbMQpKaBbSBWUBdYv08IYiwmsTtbVfZIWxtiWULXzMvYGRdxah enFpUllqka6GXVJSZnlGSm5iZo2toYKaXm1pcnJiempOYVKyXnJ+7iREYggxAsINx9mX/Q4yS HExKory7PzZECPEl5adUZiQWZ8QXleakFh9ilOHgUJLgzY5ujBASLEpNT61Iy8wBRgNMWoKDR 0mEdw5Imre4IDG3ODMdInWK0ZKjp+v0SyaOUxtA5J5dl18yCbHk5eelSonzRoA0CIA0ZJTmwY 2DRewlRlkpYV5GoAOFeApSi3IzS1DlXzGKczAqCfPmg0zhycwrgdv6CuggJqCDrJTrQQ4qSUR ISTUw1uifu2q49aFUVe3m4rf3vGZ6Ga64vbWMv4+deY3MTofkM/tOzZ0sf7zDz++oR8kb+9o5 C9ZkPyp2DxB7yfzk9fRPyikFOw+ekyu44mkY9YL3+o1/QZ/32NsENC7n/njvU2/JzjzhzkjZi d/2+KvkPHtSq3lcaWq8Yqfgb3EJF7HPBztCooJ8lViKMxINtZiLihMBkLCd5NMCAAA= X-Env-Sender: michrozis@gmail.com X-Msg-Ref: server-14.tower-27.messagelabs.com!1484872854!70382514!1 X-Originating-IP: [209.85.161.171] X-SpamReason: No, hits=1.7 required=7.0 tests=BODY_RANDOM_LONG, HTML_10_20,HTML_MESSAGE,RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 9.1.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 32126 invoked from network); 20 Jan 2017 00:40:55 -0000 Received: from mail-yw0-f171.google.com (HELO mail-yw0-f171.google.com) (209.85.161.171) by server-14.tower-27.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 20 Jan 2017 00:40:55 -0000 Received: by mail-yw0-f171.google.com with SMTP id l19so58261866ywc.2 for ; Thu, 19 Jan 2017 16:40:55 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=I5UbbMbGxtZ3ZAnd0sJlArxu6CvmpzZsnuf2IfvtYOY=; b=AVxFkerB+4qJmTlVYNOL/SsmCwKyQBxiu5RhvFJKrGMauzXrXNXiaobZAIJz60Q5gn r77ZzXdr/mtELCq/TeHS/e6v3bwOIQyW7fyQ070UFdzg/lIjvv9331dc55k4V7cMLKfU aNhLsHx8Ng0IaQBI3p84ulKCeMKAHUi2wZ6y/eE9Xd6ohEKeXkhw5YbRo4TexMqro6EC Xen6olO8jaZ4C0nc7HTPSnNhrjg7DbMAfBPLnYFSs44PYFuqlYu93wdzLsFlqOlxcyBx ol4hWbQZdhVTOXCU4Z0ZmGxqFEXH5BW6miLgZ7uGhHAhQ+R/BmQiZcViuYVBS1bPfcS6 Bm/g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=I5UbbMbGxtZ3ZAnd0sJlArxu6CvmpzZsnuf2IfvtYOY=; b=skGBdRf0K33MyW0+V0yUWKeKmAp2248+Uu4FtCqB2CRSDkTjMWC7MZEUmjKJ2gv6il LvB7xwCZi/MxpsalRymUgCj1BBWz2y2CP2CahdmsEYqisucoj0/gS6I/Av9cNWomOiaG nbVa4Hoo2AoRC+DyrR71Sa2EM3x/GvWBXrQy7KdAQ9xvXhFnAIKSBMl3m94S15Iz/hzE hfY8CzP26vqVL70k/4S4qwCmTetTv//g1Inukwj1cz4b496xAwTMaWlvnLUGfCiz4cwd cAYQn/sM+eH9irA8sUkJdf0/5KpTewq50jCv589XUc/6k1KL15/R7jfI56irn3e1J1jN 5SsQ== X-Gm-Message-State: AIkVDXIPe1Z1/Dkx5oBbBHgFbI6d/GOB4xJajDReLDNYh2Zqo+l+PPMB+l3FdAmZGjyG8CdEyhYPjjS0gyOdeA== X-Received: by 10.237.42.1 with SMTP id c1mr9756865qtd.10.1484872854153; Thu, 19 Jan 2017 16:40:54 -0800 (PST) MIME-Version: 1.0 Received: by 10.12.170.220 with HTTP; Thu, 19 Jan 2017 16:40:53 -0800 (PST) From: Michalis R Date: Fri, 20 Jan 2017 02:40:53 +0200 Message-ID: To: xen-api@lists.xen.org Subject: [Xen-API] continuous address space with multiple pages between different domUs X-BeenThere: xen-api@lists.xen.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: User and development list for XCP and XAPI List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============5927603390006414784==" Errors-To: xen-api-bounces@lists.xen.org Sender: "Xen-api" --===============5927603390006414784== Content-Type: multipart/alternative; boundary=001a113e0ad2023a0305467be7c6 --001a113e0ad2023a0305467be7c6 Content-Type: text/plain; charset=UTF-8 Hi I want to make a continuous address space between two different guest domains. In particular I want to make a read/write queue, so that both domains, can have an address where they can memcpy from/to data. For example: I want 64k bytes space in kernel to act as a queue. I thought of allocating 16 pages in one domain (16*PAGE SIZE=64k), grant_foreign_access to foreign guest (so I now have 16 gref id's) and map these gref_ids in foreign guest. But I have a question: - How can each side, access the allocated memory as continuous space, and not 16 different spaces? For one page, i alloc_page(...), and then use addr = page_address(page) so I can memcpy to addr bytes up to 4k long. What about more pages? --001a113e0ad2023a0305467be7c6 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hi
I want= to make a continuous address space between two different guest domains.
In particular I want to make a read/write queue, so that both domai= ns, can have an address where they can memcpy from/to data.
For ex= ample:
I want 64k bytes space in kernel to act as a queue.
I thought of allocating 16 pages in one domain (16*PAGE SIZE=3D64k), gran= t_foreign_access to foreign guest (so I now have 16 gref id's) and map = these gref_ids in foreign guest.
But I have a question:
-= How can each side, access the allocated memory as continuous space, and no= t 16 different spaces?
For one page, i alloc_page(...), and then u= se addr =3D page_address(page) so I can memcpy to addr bytes up to 4k long.= What about more pages?
--001a113e0ad2023a0305467be7c6-- --===============5927603390006414784== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWFwaSBt YWlsaW5nIGxpc3QKWGVuLWFwaUBsaXN0cy54ZW4ub3JnCmh0dHBzOi8vbGlzdHMueGVuLm9yZy9j Z2ktYmluL21haWxtYW4vbGlzdGluZm8veGVuLWFwaQo= --===============5927603390006414784==-- From xen-api-bounces@lists.xen.org Fri Jan 20 00:41:06 2017 Return-path: Envelope-to: archives@lists.xen.org Delivery-date: Fri, 20 Jan 2017 00:41:06 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cUNGD-0004Ko-OY; Fri, 20 Jan 2017 00:40:57 +0000 Received: from mail6.bemta6.messagelabs.com ([193.109.254.103]) by lists.xenproject.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cUNGD-0004Ki-CN for xen-api@lists.xen.org; Fri, 20 Jan 2017 00:40:57 +0000 Received: from [193.109.254.147] by server-3.bemta-6.messagelabs.com id EC/BC-09053-89C51885; Fri, 20 Jan 2017 00:40:56 +0000 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrAIsWRWlGSWpSXmKPExsVyMXThat3pMY0 RBufuKlkcn7WPxYHR4+ju30wBjFGsmXlJ+RUJrBnrd61gK5jGV7G35S1bA2MTTxcjF4eQwARG iRnzpjKDOCwCd1gkbp89AeRwckgI/GCRWNbND2HnSCw//w0qni+x+eMHVhCbV0BQ4uTMJywgt pCAt8SbtT8Yuxg5ONgE1CS2/rUDCbMIqEo0/nzACFEeINH85y9YubCAr8SjJ6+ZQGwRAUmJ+6 dugI1kFvCSmH3xIOsERt5ZSDbMQpKaBbSBWUBdYv08IYiwmsTtbVfZIWxtiWULXzMvYGRdxah enFpUllqka6GXVJSZnlGSm5iZo2toYKaXm1pcnJiempOYVKyXnJ+7iREYggxAsINx9mX/Q4yS HExKory7PzZECPEl5adUZiQWZ8QXleakFh9ilOHgUJLgzY5ujBASLEpNT61Iy8wBRgNMWoKDR 0mEdw5Imre4IDG3ODMdInWK0ZKjp+v0SyaOUxtA5J5dl18yCbHk5eelSonzRoA0CIA0ZJTmwY 2DRewlRlkpYV5GoAOFeApSi3IzS1DlXzGKczAqCfPmg0zhycwrgdv6CuggJqCDrJTrQQ4qSUR ISTUw1uifu2q49aFUVe3m4rf3vGZ6Ga64vbWMv4+deY3MTofkM/tOzZ0sf7zDz++oR8kb+9o5 C9ZkPyp2DxB7yfzk9fRPyikFOw+ekyu44mkY9YL3+o1/QZ/32NsENC7n/njvU2/JzjzhzkjZi d/2+KvkPHtSq3lcaWq8Yqfgb3EJF7HPBztCooJ8lViKMxINtZiLihMBkLCd5NMCAAA= X-Env-Sender: michrozis@gmail.com X-Msg-Ref: server-14.tower-27.messagelabs.com!1484872854!70382514!1 X-Originating-IP: [209.85.161.171] X-SpamReason: No, hits=1.7 required=7.0 tests=BODY_RANDOM_LONG, HTML_10_20,HTML_MESSAGE,RCVD_BY_IP X-StarScan-Received: X-StarScan-Version: 9.1.1; banners=-,-,- X-VirusChecked: Checked Received: (qmail 32126 invoked from network); 20 Jan 2017 00:40:55 -0000 Received: from mail-yw0-f171.google.com (HELO mail-yw0-f171.google.com) (209.85.161.171) by server-14.tower-27.messagelabs.com with AES128-GCM-SHA256 encrypted SMTP; 20 Jan 2017 00:40:55 -0000 Received: by mail-yw0-f171.google.com with SMTP id l19so58261866ywc.2 for ; Thu, 19 Jan 2017 16:40:55 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:from:date:message-id:subject:to; bh=I5UbbMbGxtZ3ZAnd0sJlArxu6CvmpzZsnuf2IfvtYOY=; b=AVxFkerB+4qJmTlVYNOL/SsmCwKyQBxiu5RhvFJKrGMauzXrXNXiaobZAIJz60Q5gn r77ZzXdr/mtELCq/TeHS/e6v3bwOIQyW7fyQ070UFdzg/lIjvv9331dc55k4V7cMLKfU aNhLsHx8Ng0IaQBI3p84ulKCeMKAHUi2wZ6y/eE9Xd6ohEKeXkhw5YbRo4TexMqro6EC Xen6olO8jaZ4C0nc7HTPSnNhrjg7DbMAfBPLnYFSs44PYFuqlYu93wdzLsFlqOlxcyBx ol4hWbQZdhVTOXCU4Z0ZmGxqFEXH5BW6miLgZ7uGhHAhQ+R/BmQiZcViuYVBS1bPfcS6 Bm/g== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to; bh=I5UbbMbGxtZ3ZAnd0sJlArxu6CvmpzZsnuf2IfvtYOY=; b=skGBdRf0K33MyW0+V0yUWKeKmAp2248+Uu4FtCqB2CRSDkTjMWC7MZEUmjKJ2gv6il LvB7xwCZi/MxpsalRymUgCj1BBWz2y2CP2CahdmsEYqisucoj0/gS6I/Av9cNWomOiaG nbVa4Hoo2AoRC+DyrR71Sa2EM3x/GvWBXrQy7KdAQ9xvXhFnAIKSBMl3m94S15Iz/hzE hfY8CzP26vqVL70k/4S4qwCmTetTv//g1Inukwj1cz4b496xAwTMaWlvnLUGfCiz4cwd cAYQn/sM+eH9irA8sUkJdf0/5KpTewq50jCv589XUc/6k1KL15/R7jfI56irn3e1J1jN 5SsQ== X-Gm-Message-State: AIkVDXIPe1Z1/Dkx5oBbBHgFbI6d/GOB4xJajDReLDNYh2Zqo+l+PPMB+l3FdAmZGjyG8CdEyhYPjjS0gyOdeA== X-Received: by 10.237.42.1 with SMTP id c1mr9756865qtd.10.1484872854153; Thu, 19 Jan 2017 16:40:54 -0800 (PST) MIME-Version: 1.0 Received: by 10.12.170.220 with HTTP; Thu, 19 Jan 2017 16:40:53 -0800 (PST) From: Michalis R Date: Fri, 20 Jan 2017 02:40:53 +0200 Message-ID: To: xen-api@lists.xen.org Subject: [Xen-API] continuous address space with multiple pages between different domUs X-BeenThere: xen-api@lists.xen.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: User and development list for XCP and XAPI List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Content-Type: multipart/mixed; boundary="===============5927603390006414784==" Errors-To: xen-api-bounces@lists.xen.org Sender: "Xen-api" --===============5927603390006414784== Content-Type: multipart/alternative; boundary=001a113e0ad2023a0305467be7c6 --001a113e0ad2023a0305467be7c6 Content-Type: text/plain; charset=UTF-8 Hi I want to make a continuous address space between two different guest domains. In particular I want to make a read/write queue, so that both domains, can have an address where they can memcpy from/to data. For example: I want 64k bytes space in kernel to act as a queue. I thought of allocating 16 pages in one domain (16*PAGE SIZE=64k), grant_foreign_access to foreign guest (so I now have 16 gref id's) and map these gref_ids in foreign guest. But I have a question: - How can each side, access the allocated memory as continuous space, and not 16 different spaces? For one page, i alloc_page(...), and then use addr = page_address(page) so I can memcpy to addr bytes up to 4k long. What about more pages? --001a113e0ad2023a0305467be7c6 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Hi
I want= to make a continuous address space between two different guest domains.
In particular I want to make a read/write queue, so that both domai= ns, can have an address where they can memcpy from/to data.
For ex= ample:
I want 64k bytes space in kernel to act as a queue.
I thought of allocating 16 pages in one domain (16*PAGE SIZE=3D64k), gran= t_foreign_access to foreign guest (so I now have 16 gref id's) and map = these gref_ids in foreign guest.
But I have a question:
-= How can each side, access the allocated memory as continuous space, and no= t 16 different spaces?
For one page, i alloc_page(...), and then u= se addr =3D page_address(page) so I can memcpy to addr bytes up to 4k long.= What about more pages?
--001a113e0ad2023a0305467be7c6-- --===============5927603390006414784== Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Content-Disposition: inline X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX18KWGVuLWFwaSBt YWlsaW5nIGxpc3QKWGVuLWFwaUBsaXN0cy54ZW4ub3JnCmh0dHBzOi8vbGlzdHMueGVuLm9yZy9j Z2ktYmluL21haWxtYW4vbGlzdGluZm8veGVuLWFwaQo= --===============5927603390006414784==--