From mboxrd@z Thu Jan 1 00:00:00 1970 From: Razvan Cojocaru Subject: Issues with the xen-access.c model Date: Tue, 5 Apr 2016 13:55:30 +0300 Message-ID: <570399A2.4090507@bitdefender.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: "xen-devel@lists.xen.org" Cc: Andrew Cooper , Tamas K Lengyel List-Id: xen-devel@lists.xenproject.org SGVsbG8sCgp4ZW4tYWNjZXNzLmMgZG9lcyByb3VnaGx5IHRoaXM6Cgpmb3IgKDs7KSB7Cglwb2xs X2V2dF9jaGFubmVsKCk7CgoJaWYgKG5ld19ldmVudHMpIHsKCQl3aGlsZSAocmluZ19idWZmZXJf aGFzX3JlcXVlc3RzKSB7CgkJCXB1bGxfcmVxdWVzdCgpOwoJCQlwcm9jZXNzX3JlcXVlc3QoKTsK CQkJcHV0X3Jlc3BvbnNlKCk7CgkJfQoKCQlzaWduYWxfZXZ0X2NoYW5uZWwoKTsKCX0KfQoKVGhl IHByb2JsZW1zIGFyZSB0aGVzZToKCjEuIHZtX2V2ZW50X3B1dF9yZXF1ZXN0KCkgZG9lcyBub3Rp ZnlfdmlhX3hlbl9ldmVudF9jaGFubmVsKGQsCnZlZC0+eGVuX3BvcnQpOyBhdCB0aGUgdmVyeSBl bmQsIGFuZCB3ZSBzZWVtIHRvIGJlIHVzaW5nIGEgRklGTyBldmVudApjaGFubmVsIChpZiBJJ20g cmVhZGluZyB0aGUgY29kZSByaWdodCwgaXQncyBnZW5lcmljIGV2ZW50IGNoYW5uZWwgY29kZQp0 aGF0IHByZS1kYXRlcyB0aGUgdm1fZXZlbnQgY29kZSB0aGF0IHNpdHMgb24gdG9wIG9mIGl0KS4K ClRoaXMgbWVhbnMgdGhhdCBmb3IgYSBndWVzdCB0aGF0J3MgcnVubmluZyB0d28gVkNQVXMsIHRo ZSBmb2xsb3dpbmcKc2NlbmFyaW8gaXMgcG9zc2libGU6CgoqIFZDUFUxIHB1dHMgYW4gZXZlbnQg aW4gdGhlIHJpbmcgYnVmZmVyCiogVkNQVTEgc2lnbmFscyB0aGUgZXZlbnQgY2hhbm5lbAoqIHBv bGxfZXZ0X2NoYW5uZWwoKSB3YWtlcyB1cAoqIFZDUFUyIHB1dHMgYW4gZXZlbnQgaW4gdGhlIHJp bmcgYnVmZmVyCiogdGhlIGxvb3AgcHJvY2Vzc2VzIHRoZSBmaXJzdCBldmVudAoqIFZDUFUyIHNp Z25hbHMgdGhlIGV2ZW50IGNoYW5uZWwKKiB0aGUgbG9vcCBwcm9jZXNzZXMgdGhlIHNlY29uZCBl dmVudCAoc2luY2UgdGhlcmUgX2FyZV8gbW9yZSByZXF1ZXN0cwppbiB0aGUgcmluZyBidWZmZXIp CiogdGhlIGxvb3Agc2lnbmFscyB0aGUgZXZlbnQgY2hhbm5lbCB0aGF0IHJlcXVlc3RzIGhhdmUg YmVlbiBwcm9jZXNzZWQKKiBwb2xsX2V2dF9jaGFubmVsKCkgd2FrZXMgdXAgYWdhaW4sIGJlY2F1 c2Ugb2YgdGhlIHNlY29uZCBldmVudCBjaGFubmVsCnNpZ25hbCwgYnV0IHRoaXMgaXMgcG9pbnRs ZXNzIHNpbmNlIGFsbCBldmVudHMgaGF2ZSBhbHJlYWR5IGJlZW4gcHJvY2Vzc2VkCgpUaGlzIGNh biBiZSBhdm9pZGVkIGJ5IGNvdW50aW5nIHRoZSByZXF1ZXN0cyBwcm9jZXNzZWQgdnMuIHRoZSBu dW1iZXIgb2YKc3VjY2VzZnVsIHBvbGwoKXMsIGJ1dCBpdCBzdGlsbCBkb2VzIG5vdCBzb2x2ZSB0 aGUgc2Vjb25kIHByb2JsZW06CgoyLiBSYWNlIGNvbmRpdGlvbnMuIEF0IGxlYXN0IGluIHRoZW9y eSwgdGhlcmUncyBub3RoaW5nIHRvIHN0b3AgdGhlCnNlY29uZCBpdGVyYXRpb24gb2YgdGhlIHJl cXVlc3QgcHJvY2Vzc2luZyBsb29wIHRvIHJlYWQgYSBwYXJ0aWFsbHkKd3JpdHRlbiByZXF1ZXN0 IGZyb20gdGhlIHJpbmcgYnVmZmVyLCBvciBnYXJiYWdlIGxlZnQgb3ZlciBmcm9tIGEKcHJldmlv dXMgcmVxdWVzdCwgaWYgaXQgaGl0cyBpdCAianVzdCByaWdodCIgKGkuZS4gdGhlICJWQ1BVMiBw dXRzIGFuCmV2ZW50IGluIHRoZSByaW5nIGJ1ZmZlciIgcGFydCBjYW4gcnVuIG9uIHRvcCBvZiB0 aGUgInRoZSBsb29wIHByb2Nlc3Nlcwp0aGUgc2Vjb25kIGV2ZW50IikuCgpBbGwgdGhpcyBkb2Vz bid0IHJlYWxseSBzaG93IHVwIHVubGVzcyB3ZSdyZSBpbiBoZWF2eSBwcm9jZXNzaW5nCnNjZW5h cmlvcywgYnV0IHRoZXkgY2FuIG9jY3VyLCBlc3BlY2lhbGx5IGluIHN5bmNlZCB2bV9ldmVudCBz Y2VuYXJpb3MuCgpUaGUgcHJvYmxlbXMgc2VlbXMgdG8gYmUgYWxsZXZpYXRlZCBieSBjaGFuZ2lu ZyB0aGUgbG9vcCB0byB0aGlzOgoKZm9yICg7OykgewoJcG9sbF9ldnRfY2hhbm5lbCgpOwoKCWlm IChuZXdfZXZlbnRzKSB7CgkJd2hpbGUgKHJpbmdfYnVmZmVyX2hhc19yZXF1ZXN0cykgewoJCQlw dWxsX3JlcXVlc3QoKTsKCQkJcHJvY2Vzc19yZXF1ZXN0KCk7CgkJCXB1dF9yZXNwb25zZSgpOwoK CQkJLyogTW92ZWQgaGVyZS4gKi8KCQkJc2lnbmFsX2V2dF9jaGFubmVsKCk7CgkJfQoJfQp9Cgpi dXQgaXQncyBvYnZpb3VzbHkgbm90IGZvb2xwcm9vZiwgdGhlIG1haW4gcHJvYmxlbSByZW1haW5p bmcgdGhlCnN5bmNocm9uaXphdGlvbiBvZiB0aGUgcmluZyBidWZmZXIgZnJvbSBib3RoIHRoZSBo eXBlcnZpc29yIHNpZGUgYW5kCnVzZXJzcGFjZS4KCkhvdyBzaG91bGQgd2UgcHJvY2VlZCB0byBm aXggdGhpcz8KCgpUaGFua3MsClJhenZhbgoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMu eGVuLm9yZwpodHRwOi8vbGlzdHMueGVuLm9yZy94ZW4tZGV2ZWwK