From mboxrd@z Thu Jan 1 00:00:00 1970 From: Andrew Cooper Subject: Re: [PATCH for-4.7] x86/cpuid: Calculate a guests xfeature_mask from its featureset Date: Fri, 3 Jun 2016 12:03:48 +0100 Message-ID: <57516414.4020200@citrix.com> References: <1464886081-2011-1-git-send-email-andrew.cooper3@citrix.com> <575175BE02000078000F181D@prv-mh.provo.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <575175BE02000078000F181D@prv-mh.provo.novell.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Jan Beulich Cc: Huaitong Han , Wei Liu , Luwei Kang , Xen-devel List-Id: xen-devel@lists.xenproject.org T24gMDMvMDYvMTYgMTE6MTksIEphbiBCZXVsaWNoIHdyb3RlOgo+Pj4+IE9uIDAyLjA2LjE2IGF0 IDE4OjQ4LCA8YW5kcmV3LmNvb3BlcjNAY2l0cml4LmNvbT4gd3JvdGU6Cj4+IEBAIC0zNDQzLDYg KzM0NDMsNTEgQEAgdm9pZCBodm1fY3B1aWQodW5zaWduZWQgaW50IGlucHV0LCB1bnNpZ25lZCBp bnQgKmVheCwgdW5zaWduZWQgaW50ICplYngsCj4+ICAgICAgICAgIHN3aXRjaCAoIGNvdW50ICkK Pj4gICAgICAgICAgewo+PiAgICAgICAgICBjYXNlIDA6Cj4+ICsgICAgICAgIHsKPj4gKyAgICAg ICAgICAgIHVpbnQ2NF90IHhmZWF0dXJlX21hc2sgPSBYU1RBVEVfRlBfU1NFOwo+PiArICAgICAg ICAgICAgdWludDMyX3QgeHN0YXRlX3NpemUgPSBYU1RBVEVfQVJFQV9NSU5fU0laRTsKPj4gKwo+ PiArICAgICAgICAgICAgaWYgKCBfZWN4ICYgY3B1ZmVhdF9tYXNrKFg4Nl9GRUFUVVJFX0FWWCkg KQo+PiArICAgICAgICAgICAgewo+PiArICAgICAgICAgICAgICAgIHhmZWF0dXJlX21hc2sgfD0g WFNUQVRFX1lNTTsKPj4gKyAgICAgICAgICAgICAgICB4c3RhdGVfc2l6ZSA9IE1BWCh4c3RhdGVf c2l6ZSwKPj4gKyAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICB4c3RhdGVfb2Zmc2V0 c1tfWFNUQVRFX1lNTV0gKwo+PiArICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIHhz dGF0ZV9zaXplc1tfWFNUQVRFX1lNTV0pOwo+IEFueSByZWFzb24gbm90IHRvIHVzZSB0aGUgdHlw ZSBzYWZlIG1heCgpIGhlcmU/CgpDb21waWxlciBzYXlzIG5vLiAgRml4ZWQuCgo+ICBBbHNvIGlu IHRoaXMgZmlyc3QKPiBjb25zdHJ1Y3QgdGhlcmUncyBubyByZWFsIHJlYXNvbiB0byB1c2UgTUFY KCkgb3IgbWF4KCkgaW4gdGhlIGZpcnN0Cj4gcGxhY2UuCgpJIHB1dCBpdCBpbiBmb3IgY29kZSBj b25zaXN0ZW5jeSBvbmx5LgoKPgo+PiBAQCAtMTA4NywxOSArMTA4Nyw0OCBAQCB2b2lkIHB2X2Nw dWlkKHN0cnVjdCBjcHVfdXNlcl9yZWdzICpyZWdzKQo+PiAgICAgICAgICBicmVhazsKPj4gIAo+ PiAgICAgIGNhc2UgWFNUQVRFX0NQVUlEOgo+PiAtICAgICAgICBpZiAoICEoKCFpc19jb250cm9s X2RvbWFpbihjdXJyZCkgJiYgIWlzX2hhcmR3YXJlX2RvbWFpbihjdXJyZCkKPj4gLSAgICAgICAg ICAgICAgICA/ICh7Cj4+IC0gICAgICAgICAgICAgICAgICAgIHVpbnQzMl90IGVjeDsKPj4gLQo+ PiAtICAgICAgICAgICAgICAgICAgICBkb21haW5fY3B1aWQoY3VycmQsIDEsIDAsICZ0bXAsICZ0 bXAsICZlY3gsICZ0bXApOwo+PiAtICAgICAgICAgICAgICAgICAgICBlY3ggJiBwdl9mZWF0dXJl c2V0W0ZFQVRVUkVTRVRfMWNdOwo+PiAtICAgICAgICAgICAgICAgICAgfSkKPj4gLSAgICAgICAg ICAgICAgICA6IGNwdWlkX2VjeCgxKSkgJiBjcHVmZWF0X21hc2soWDg2X0ZFQVRVUkVfWFNBVkUp KSB8fAo+PiAtICAgICAgICAgICAgIHN1YmxlYWYgPj0gNjMgKQo+PiArCj4+ICsgICAgICAgIGlm ICggIWlzX2NvbnRyb2xfZG9tYWluKGN1cnJkKSAmJiAhaXNfaGFyZHdhcmVfZG9tYWluKGN1cnJk KSApCj4+ICsgICAgICAgICAgICBkb21haW5fY3B1aWQoY3VycmQsIDEsIDAsICZ0bXAsICZ0bXAs ICZfZWN4LCAmdG1wKTsKPj4gKyAgICAgICAgZWxzZQo+PiArICAgICAgICAgICAgX2VjeCA9IGNw dWlkX2VjeCgxKTsKPj4gKyAgICAgICAgX2VjeCAmPSBwdl9mZWF0dXJlc2V0W0ZFQVRVUkVTRVRf MWNdOwo+PiArCj4+ICsgICAgICAgIGlmICggIShfZWN4ICYgY3B1ZmVhdF9tYXNrKFg4Nl9GRUFU VVJFX1hTQVZFKSkgfHwgc3VibGVhZiA+PSA2MyApCj4+ICAgICAgICAgICAgICBnb3RvIHVuc3Vw cG9ydGVkOwo+PiAgICAgICAgICBzd2l0Y2ggKCBzdWJsZWFmICkKPj4gICAgICAgICAgewo+PiAg ICAgICAgICBjYXNlIDA6Cj4+ICsgICAgICAgIHsKPj4gKyAgICAgICAgICAgIHVpbnQ2NF90IHhm ZWF0dXJlX21hc2sgPSBYU1RBVEVfRlBfU1NFOwo+PiArICAgICAgICAgICAgdWludDMyX3QgeHN0 YXRlX3NpemUgPSBYU1RBVEVfQVJFQV9NSU5fU0laRTsKPj4gKwo+PiArICAgICAgICAgICAgaWYg KCBfZWN4ICYgY3B1ZmVhdF9tYXNrKFg4Nl9GRUFUVVJFX0FWWCkgKQo+PiArICAgICAgICAgICAg ewo+PiArICAgICAgICAgICAgICAgIHhmZWF0dXJlX21hc2sgfD0gWFNUQVRFX1lNTTsKPj4gKyAg ICAgICAgICAgICAgICB4c3RhdGVfc2l6ZSA9IE1BWCh4c3RhdGVfc2l6ZSwKPj4gKyAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgICB4c3RhdGVfb2Zmc2V0c1tfWFNUQVRFX1lNTV0gKwo+ PiArICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIHhzdGF0ZV9zaXplc1tfWFNUQVRF X1lNTV0pOwo+PiArICAgICAgICAgICAgfQo+PiArCj4+ICsgICAgICAgICAgICBpZiAoICFpc19j b250cm9sX2RvbWFpbihjdXJyZCkgJiYgIWlzX2hhcmR3YXJlX2RvbWFpbihjdXJyZCkgKQo+PiAr ICAgICAgICAgICAgICAgIGRvbWFpbl9jcHVpZChjdXJyZCwgMHg4MDAwMDAwMSwgMCwgJnRtcCwg JnRtcCwgJl9lY3gsICZ0bXApOwo+PiArICAgICAgICAgICAgZWxzZQo+PiArICAgICAgICAgICAg ICAgIF9lY3ggPSBjcHVpZF9lY3goMHg4MDAwMDAwMSk7Cj4+ICsgICAgICAgICAgICBfZWN4ICY9 IHB2X2ZlYXR1cmVzZXRbRkVBVFVSRVNFVF9lMWNdOwo+PiArCj4+ICsgICAgICAgICAgICBpZiAo IF9lY3ggJiBjcHVmZWF0X21hc2soWDg2X0ZFQVRVUkVfTFdQKSApCj4+ICsgICAgICAgICAgICB7 Cj4+ICsgICAgICAgICAgICAgICAgeGZlYXR1cmVfbWFzayB8PSBYU1RBVEVfTFdQOwo+PiArICAg ICAgICAgICAgICAgIHhzdGF0ZV9zaXplID0gTUFYKHhzdGF0ZV9zaXplLAo+PiArICAgICAgICAg ICAgICAgICAgICAgICAgICAgICAgICAgIHhzdGF0ZV9vZmZzZXRzW19YU1RBVEVfTFdQXSArCj4+ ICsgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgeHN0YXRlX3NpemVzW19YU1RBVEVf TFdQXSk7Cj4+ICsgICAgICAgICAgICB9Cj4gSSdtIHNvcnJ5IGZvciBub3Qgbm90aWNpbmcgaW4g dGhlIHByZS1yZXZpZXcgdGhhdCBMV1AgaXMgSFZNLW9ubHkgdG9vLAo+IGFzIHBlciBjcHVmZWF0 dXJlc2V0LmguCgpTbyBpdCBpcy4gIEkgd2lsbCB0cmlwbGUgY2hlY2sgYWxsIG9mIHRoaXMuCgp+ QW5kcmV3CgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpY ZW4tZGV2ZWwgbWFpbGluZyBsaXN0Clhlbi1kZXZlbEBsaXN0cy54ZW4ub3JnCmh0dHA6Ly9saXN0 cy54ZW4ub3JnL3hlbi1kZXZlbAo=