From mboxrd@z Thu Jan 1 00:00:00 1970 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: base64 Subject: [v2,1/2] x86: refactor CR4 setting and shadow write From: Nadav Amit Message-Id: <20171125032907.2241-2-namit@vmware.com> Date: Fri, 24 Nov 2017 19:29:06 -0800 To: linux-kernel@vger.kernel.org, linux-edac@vger.kernel.org Cc: nadav.amit@gmail.com, Nadav Amit , Andy Lutomirski , Thomas Gleixner , Ingo Molnar , "H. Peter Anvin" , x86@kernel.org List-ID: UmVmYWN0b3IgdGhlIHdyaXRlIHRvIENSNCBhbmQgaXRzIHNoYWRvdyB2YWx1ZS4gVGhpcyBpcyBk b25lIGluCnByZXBhcmF0aW9uIGZvciB0aGUgYWRkaXRpb24gb2YgYW4gYXNzZXJ0aW9uIHRvIGNo ZWNrIHRoYXQgSVJRcyBhcmUKZGlzYWJsZWQgZHVyaW5nIENSNCB1cGRhdGUuCgpObyBmdW5jdGlv bmFsIGNoYW5nZS4KCkNjOiBBbmR5IEx1dG9taXJza2kgPGx1dG9Aa2VybmVsLm9yZz4KQ2M6IFRo b21hcyBHbGVpeG5lciA8dGdseEBsaW51dHJvbml4LmRlPgpDYzogSW5nbyBNb2xuYXIgPG1pbmdv QHJlZGhhdC5jb20+CkNjOiAiSC4gUGV0ZXIgQW52aW4iIDxocGFAenl0b3IuY29tPgpDYzogeDg2 QGtlcm5lbC5vcmcKClNpZ25lZC1vZmYtYnk6IE5hZGF2IEFtaXQgPG5hbWl0QHZtd2FyZS5jb20+ Ci0tLQogYXJjaC94ODYvaW5jbHVkZS9hc20vdGxiZmx1c2guaCB8IDI0ICsrKysrKysrKysrLS0t LS0tLS0tLS0tLQogMSBmaWxlIGNoYW5nZWQsIDExIGluc2VydGlvbnMoKyksIDEzIGRlbGV0aW9u cygtKQoKZGlmZiAtLWdpdCBhL2FyY2gveDg2L2luY2x1ZGUvYXNtL3RsYmZsdXNoLmggYi9hcmNo L3g4Ni9pbmNsdWRlL2FzbS90bGJmbHVzaC5oCmluZGV4IDUwOTA0NmNmYTVjZS4uZTczNmY3ZjBi YTkyIDEwMDY0NAotLS0gYS9hcmNoL3g4Ni9pbmNsdWRlL2FzbS90bGJmbHVzaC5oCisrKyBiL2Fy Y2gveDg2L2luY2x1ZGUvYXNtL3RsYmZsdXNoLmgKQEAgLTE3MywxNyArMTczLDIwIEBAIHN0YXRp YyBpbmxpbmUgdm9pZCBjcjRfaW5pdF9zaGFkb3codm9pZCkKIAl0aGlzX2NwdV93cml0ZShjcHVf dGxic3RhdGUuY3I0LCBfX3JlYWRfY3I0KCkpOwogfQogCitzdGF0aWMgaW5saW5lIHZvaWQgX19j cjRfc2V0KHVuc2lnbmVkIGxvbmcgY3I0KQoreworCXRoaXNfY3B1X3dyaXRlKGNwdV90bGJzdGF0 ZS5jcjQsIGNyNCk7CisJX193cml0ZV9jcjQoY3I0KTsKK30KKwogLyogU2V0IGluIHRoaXMgY3B1 J3MgQ1I0LiAqLwogc3RhdGljIGlubGluZSB2b2lkIGNyNF9zZXRfYml0cyh1bnNpZ25lZCBsb25n IG1hc2spCiB7CiAJdW5zaWduZWQgbG9uZyBjcjQ7CiAKIAljcjQgPSB0aGlzX2NwdV9yZWFkKGNw dV90bGJzdGF0ZS5jcjQpOwotCWlmICgoY3I0IHwgbWFzaykgIT0gY3I0KSB7Ci0JCWNyNCB8PSBt YXNrOwotCQl0aGlzX2NwdV93cml0ZShjcHVfdGxic3RhdGUuY3I0LCBjcjQpOwotCQlfX3dyaXRl X2NyNChjcjQpOwotCX0KKwlpZiAoKGNyNCB8IG1hc2spICE9IGNyNCkKKwkJX19jcjRfc2V0KGNy NCB8IG1hc2spOwogfQogCiAvKiBDbGVhciBpbiB0aGlzIGNwdSdzIENSNC4gKi8KQEAgLTE5Miwx MSArMTk1LDggQEAgc3RhdGljIGlubGluZSB2b2lkIGNyNF9jbGVhcl9iaXRzKHVuc2lnbmVkIGxv bmcgbWFzaykKIAl1bnNpZ25lZCBsb25nIGNyNDsKIAogCWNyNCA9IHRoaXNfY3B1X3JlYWQoY3B1 X3RsYnN0YXRlLmNyNCk7Ci0JaWYgKChjcjQgJiB+bWFzaykgIT0gY3I0KSB7Ci0JCWNyNCAmPSB+ bWFzazsKLQkJdGhpc19jcHVfd3JpdGUoY3B1X3RsYnN0YXRlLmNyNCwgY3I0KTsKLQkJX193cml0 ZV9jcjQoY3I0KTsKLQl9CisJaWYgKChjcjQgJiB+bWFzaykgIT0gY3I0KQorCQlfX2NyNF9zZXQo Y3I0ICYgfm1hc2spOwogfQogCiBzdGF0aWMgaW5saW5lIHZvaWQgY3I0X3RvZ2dsZV9iaXRzKHVu c2lnbmVkIGxvbmcgbWFzaykKQEAgLTIwNCw5ICsyMDQsNyBAQCBzdGF0aWMgaW5saW5lIHZvaWQg Y3I0X3RvZ2dsZV9iaXRzKHVuc2lnbmVkIGxvbmcgbWFzaykKIAl1bnNpZ25lZCBsb25nIGNyNDsK IAogCWNyNCA9IHRoaXNfY3B1X3JlYWQoY3B1X3RsYnN0YXRlLmNyNCk7Ci0JY3I0IF49IG1hc2s7 Ci0JdGhpc19jcHVfd3JpdGUoY3B1X3RsYnN0YXRlLmNyNCwgY3I0KTsKLQlfX3dyaXRlX2NyNChj cjQpOworCV9fY3I0X3NldChjcjQgXiBtYXNrKTsKIH0KIAogLyogUmVhZCB0aGUgQ1I0IHNoYWRv dy4gKi8K