From mboxrd@z Thu Jan 1 00:00:00 1970 From: Haozhong Zhang Subject: [PATCH] xen/x86: ensure copying to L1 guest in update_runstate_area() Date: Tue, 21 Feb 2017 10:11:15 +0800 Message-ID: <20170221021115.24069-1-haozhong.zhang@intel.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 , Jan Beulich , Haozhong Zhang List-Id: xen-devel@lists.xenproject.org Rm9yIGEgSFZNIGRvbWFpbiwgaWYgYSB2Y3B1IGlzIGluIHRoZSBuZXN0ZWQgZ3Vlc3QgbW9kZSwK X19yYXdfY29weV90b19ndWVzdCgpIGFuZCBfX2NvcHlfdG9fZ3Vlc3QoKSB1c2VkIGJ5CnVwZGF0 ZV9ydW5zdGF0ZV9hcmVhKCkgd2lsbCBjb3B5IGRhdGEgdG8gTDIgZ3Vlc3Qgb3RoZXIgdGhhbiBM MSBndWVzdC4KCkJlc2lkZXMgY29weWluZyB0byB0aGUgd3JvbmcgYWRkcmVzcywgdGhpcyBidWcg YWxzbyBjYXVzZXMgY3Jhc2ggaW4KdGhlIGNvZGUgcGF0aDoKICAgIGNvbnRleHRfc3dpdGNoKHBy ZXYsIG5leHQpCiAgICAgIF91cGRhdGVfcnVuc3RhdGVfYXJlYShuZXh0KQogICAgICAgIHVwZGF0 ZV9ydW5zdGF0ZV9hcmVhKG5leHQpCgkgIF9fcmF3X2NvcHlfdG9fZ3Vlc3QoLi4uKQoJICAgIC4u LgoJICAgICAgX19odm1fY29weSguLi4pCgkgICAgICAgIHBhZ2luZ19ndmFfdG9fZ2ZuKC4uLikK CQkgIG5lc3RlZGhhcF93YWxrX0wxX3AybSguLi4pCgkJICAgIG52bXhfaGFwX3dhbGtfTDFfcDJt KC4uKQoJCSAgICAgIHZteF92bWNzX2VudGVyKHYpIFsgdiA9IG5leHQgXQoJCSAgICAgICAgdm14 X3ZtY3NfdHJ5X2VudGVyKHYpIFsgdiA9IG5leHQgXQoJCQkgIGlmICggbGlrZWx5KHYgPT0gY3Vy cmVudCkgKQogICAgICAgICAgICAgICAgICAgICAgICAgICAgICByZXR1cm4gdi0+YXJjaC5odm1f dm14LnZtY3NfcGEgPT0gdGhpc19jcHUoY3VycmVudF92bWNzKTsKdm14X3ZtY3NfdHJ5X2VudGVy KCkgd2lsbCBmYWlsIGFuZCB0cmlnZ2VyIHRoZSBhc3NlcnQgaW4Kdm14X3ZtY3NfZW50ZXIoKSwg aWYgdmNwdSAnbmV4dCcgaXMgaW4gdGhlIG5lc3RlZCBndWVzdCBtb2RlIGFuZCBpcwpiZWluZyBz Y2hlZHVsZWQgdG8gYW5vdGhlciBDUFUuCgpUaGlzIGNvbW1pdCB0ZW1wb3JhbGx5IGNsZWFycyB0 aGUgbmVzdGVkIGd1ZXN0IGZsYWcgYmVmb3JlIGFsbApfX3Jhd19jb3B5X3RvX2d1ZXN0KCkgYW5k IF9fY29weV90b19ndWVzdCgpIGluIHVwZGF0ZV9ydW5zdGF0ZV9hcmVhKCksCmFuZCByZXN0b3Jl cyB0aGUgZmxhZyBhZnRlciB0aG9zZSBndWVzdCBjb3B5IG9wZXJhdGlvbnMuCgpTaWduZWQtb2Zm LWJ5OiBIYW96aG9uZyBaaGFuZyA8aGFvemhvbmcuemhhbmdAaW50ZWwuY29tPgotLS0KIHhlbi9h cmNoL3g4Ni9kb21haW4uYyB8IDIzICsrKysrKysrKysrKysrKysrKysrKysrCiAxIGZpbGUgY2hh bmdlZCwgMjMgaW5zZXJ0aW9ucygrKQoKZGlmZiAtLWdpdCBhL3hlbi9hcmNoL3g4Ni9kb21haW4u YyBiL3hlbi9hcmNoL3g4Ni9kb21haW4uYwppbmRleCA3ZDMwNzFlLi41ZjA0NDRjIDEwMDY0NAot LS0gYS94ZW4vYXJjaC94ODYvZG9tYWluLmMKKysrIGIveGVuL2FyY2gveDg2L2RvbWFpbi5jCkBA IC01MCw2ICs1MCw3IEBACiAjaW5jbHVkZSA8YXNtL21wc3BlYy5oPgogI2luY2x1ZGUgPGFzbS9s ZHQuaD4KICNpbmNsdWRlIDxhc20vaHZtL2h2bS5oPgorI2luY2x1ZGUgPGFzbS9odm0vbmVzdGVk aHZtLmg+CiAjaW5jbHVkZSA8YXNtL2h2bS9zdXBwb3J0Lmg+CiAjaW5jbHVkZSA8YXNtL2h2bS92 aXJpZGlhbi5oPgogI2luY2x1ZGUgPGFzbS9kZWJ1Z3JlZy5oPgpAQCAtMTkzMSwxMCArMTkzMiwy OSBAQCBib29sX3QgdXBkYXRlX3J1bnN0YXRlX2FyZWEoc3RydWN0IHZjcHUgKnYpCiAgICAgYm9v bF90IHJjOwogICAgIHNtYXBfY2hlY2tfcG9saWN5X3Qgc21hcF9wb2xpY3k7CiAgICAgdm9pZCBf X3VzZXIgKmd1ZXN0X2hhbmRsZSA9IE5VTEw7CisgICAgYm9vbCBuZXN0ZWRfZ3Vlc3RfbW9kZSA9 IDA7CiAKICAgICBpZiAoIGd1ZXN0X2hhbmRsZV9pc19udWxsKHJ1bnN0YXRlX2d1ZXN0KHYpKSAp CiAgICAgICAgIHJldHVybiAxOwogCisgICAgLyoKKyAgICAgKiBNdXN0IGJlIGJlZm9yZSBhbGwg Zm9sbG93aW5nIF9fcmF3X2NvcHlfdG9fZ3Vlc3QoKSBhbmQgX19jb3B5X3RvX2d1ZXN0KCkuCisg ICAgICoKKyAgICAgKiBPdGhlcndpc2UsIGlmICd2JyBpcyBpbiB0aGUgbmVzdGVkIGd1ZXN0IG1v ZGUsIHBhZ2luZ19ndmFfdG9fZ2ZuKCkgY2FsbGVkCisgICAgICogZnJvbSBfX3Jhd19jb3B5X3Rv X2d1ZXN0KCkgYW5kIF9fY29weV90b19ndWVzdCgpIHdpbGwgdHJlYXQgdGhlIHRhcmdldAorICAg ICAqIGFkZHJlc3MgYXMgTDIgZ3ZhLCBhbmQgX19yYXdfY29weV90b19ndWVzdCgpIGFuZCBfX2Nv cHlfdG9fZ3Vlc3QoKSB3aWxsCisgICAgICogY29uc2VxdWVudGx5IGNvcHkgcnVuc3RhdGUgdG8g TDIgZ3Vlc3Qgb3RoZXIgdGhhbiBMMSBndWVzdC4KKyAgICAgKgorICAgICAqIFRoZXJlZm9yZSwg d2UgY2xlYXIgdGhlIG5lc3RlZCBndWVzdCBmbGFnIGJlZm9yZSBfX3Jhd19jb3B5X3RvX2d1ZXN0 KCkKKyAgICAgKiBhbmQgX19jb3B5X3RvX2d1ZXN0KCksIGFuZCByZXN0b3JlIHRoZSBmbGFnIGFm dGVyIGFsbCBndWVzdCBjb3B5LgorICAgICAqLworICAgIGlmICggaXNfaHZtX3ZjcHUodikgJiYg cGFnaW5nX21vZGVfaGFwKHYtPmRvbWFpbikgKQorICAgIHsKKyAgICAgICAgbmVzdGVkX2d1ZXN0 X21vZGUgPSBuZXN0ZWRodm1faXNfbjIodik7CisgICAgICAgIGlmICggbmVzdGVkX2d1ZXN0X21v ZGUgKQorICAgICAgICAgICAgbmVzdGVkaHZtX3ZjcHVfZXhpdF9ndWVzdG1vZGUodik7CisgICAg fQorCiAgICAgc21hcF9wb2xpY3kgPSBzbWFwX3BvbGljeV9jaGFuZ2UodiwgU01BUF9DSEVDS19F TkFCTEVEKTsKIAogICAgIGlmICggVk1fQVNTSVNUKHYtPmRvbWFpbiwgcnVuc3RhdGVfdXBkYXRl X2ZsYWcpICkKQEAgLTE5NzEsNiArMTk5MSw5IEBAIGJvb2xfdCB1cGRhdGVfcnVuc3RhdGVfYXJl YShzdHJ1Y3QgdmNwdSAqdikKIAogICAgIHNtYXBfcG9saWN5X2NoYW5nZSh2LCBzbWFwX3BvbGlj eSk7CiAKKyAgICBpZiAoIG5lc3RlZF9ndWVzdF9tb2RlICkKKyAgICAgICAgbmVzdGVkaHZtX3Zj cHVfZW50ZXJfZ3Vlc3Rtb2RlKHYpOworCiAgICAgcmV0dXJuIHJjOwogfQogCi0tIAoyLjEwLjEK CgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpYZW4tZGV2 ZWwgbWFpbGluZyBsaXN0Clhlbi1kZXZlbEBsaXN0cy54ZW4ub3JnCmh0dHBzOi8vbGlzdHMueGVu Lm9yZy94ZW4tZGV2ZWwK