From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefano Stabellini Subject: Re: [PATCH 14/22] xen/arm: p2m: Switch the p2m lock from spinlock to rwlock Date: Tue, 26 Jul 2016 17:51:32 -0700 (PDT) Message-ID: References: <1469031064-23344-1-git-send-email-julien.grall@arm.com> <1469031064-23344-15-git-send-email-julien.grall@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <1469031064-23344-15-git-send-email-julien.grall@arm.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Julien Grall Cc: proskurin@sec.in.tum.de, sstabellini@kernel.org, steve.capper@arm.com, wei.chen@linaro.org, xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org T24gV2VkLCAyMCBKdWwgMjAxNiwgSnVsaWVuIEdyYWxsIHdyb3RlOgo+IFAyTSByZWFkcyBkbyBu b3QgcmVxdWlyZSB0byBiZSBzZXJpYWxpemVkLiBUaGlzIHdpbGwgYWRkIGNvbnRlbnRpb24KPiB3 aGVuIFBWIGRyaXZlcnMgYXJlIHVzaW5nIG11bHRpLXF1ZXVlIGJlY2F1c2UgcGFyYWxsZWwgZ3Jh bnQKPiBtYXAvdW5tYXBzL2NvcGllcyB3aWxsIGhhcHBlbiBvbiBEb21VJ3MgcDJtLgo+IAo+IFNp Z25lZC1vZmYtYnk6IEp1bGllbiBHcmFsbCA8anVsaWVuLmdyYWxsQGFybS5jb20+CgpSZXZpZXdl ZC1ieTogU3RlZmFubyBTdGFiZWxsaW5pIDxzc3RhYmVsbGluaUBrZXJuZWwub3JnPgoKCj4gICAg IEkgaGF2ZSBub3QgZG9uZSBiZW5jaGFyayB0byB2ZXJpZnkgdGhlIHBlcmZvcm1hbmNlLCBob3dl dmVyIGEgcndsb2NrCj4gICAgIGlzIGFsd2F5cyBhbiBpbXByb3ZlbWVudCBjb21wYXJlIHRvIGEg c3BpbmxvY2sgd2hlbiBtb3N0IG9mIHRoZQo+ICAgICBhY2Nlc3Mgb25seSByZWFkIGRhdGEuCj4g Cj4gICAgIEl0IG1pZ2h0IGJlIHBvc3NpYmxlIHRvIGNvbnZlcnQgdGhlIHJ3bG9jayB0byBhIHBl ci1jcHUgcndsb2NrIHdoaWNoCj4gICAgIHNob3cgc29tZSBpbXByb3ZlbWVudCBvbiB4ODYuCj4g LS0tCj4gIHhlbi9hcmNoL2FybS9wMm0uYyAgICAgICAgfCAxMiArKysrKystLS0tLS0KPiAgeGVu L2luY2x1ZGUvYXNtLWFybS9wMm0uaCB8ICAzICsrLQo+ICAyIGZpbGVzIGNoYW5nZWQsIDggaW5z ZXJ0aW9ucygrKSwgNyBkZWxldGlvbnMoLSkKPiAKPiBkaWZmIC0tZ2l0IGEveGVuL2FyY2gvYXJt L3AybS5jIGIveGVuL2FyY2gvYXJtL3AybS5jCj4gaW5kZXggZDc0YzI0OS4uNjEzNjc2NyAxMDA2 NDQKPiAtLS0gYS94ZW4vYXJjaC9hcm0vcDJtLmMKPiArKysgYi94ZW4vYXJjaC9hcm0vcDJtLmMK PiBAQCAtNDksMjcgKzQ5LDI3IEBAIHN0YXRpYyBib29sX3QgcDJtX21hcHBpbmcobHBhZV90IHB0 ZSkKPiAgCj4gIHN0YXRpYyBpbmxpbmUgdm9pZCBwMm1fd3JpdGVfbG9jayhzdHJ1Y3QgcDJtX2Rv bWFpbiAqcDJtKQo+ICB7Cj4gLSAgICBzcGluX2xvY2soJnAybS0+bG9jayk7Cj4gKyAgICB3cml0 ZV9sb2NrKCZwMm0tPmxvY2spOwo+ICB9Cj4gIAo+ICBzdGF0aWMgaW5saW5lIHZvaWQgcDJtX3dy aXRlX3VubG9jayhzdHJ1Y3QgcDJtX2RvbWFpbiAqcDJtKQo+ICB7Cj4gLSAgICBzcGluX3VubG9j aygmcDJtLT5sb2NrKTsKPiArICAgIHdyaXRlX3VubG9jaygmcDJtLT5sb2NrKTsKPiAgfQo+ICAK PiAgc3RhdGljIGlubGluZSB2b2lkIHAybV9yZWFkX2xvY2soc3RydWN0IHAybV9kb21haW4gKnAy bSkKPiAgewo+IC0gICAgc3Bpbl9sb2NrKCZwMm0tPmxvY2spOwo+ICsgICAgcmVhZF9sb2NrKCZw Mm0tPmxvY2spOwo+ICB9Cj4gIAo+ICBzdGF0aWMgaW5saW5lIHZvaWQgcDJtX3JlYWRfdW5sb2Nr KHN0cnVjdCBwMm1fZG9tYWluICpwMm0pCj4gIHsKPiAtICAgIHNwaW5fdW5sb2NrKCZwMm0tPmxv Y2spOwo+ICsgICAgcmVhZF91bmxvY2soJnAybS0+bG9jayk7Cj4gIH0KPiAgCj4gIHN0YXRpYyBp bmxpbmUgaW50IHAybV9pc19sb2NrZWQoc3RydWN0IHAybV9kb21haW4gKnAybSkKPiAgewo+IC0g ICAgcmV0dXJuIHNwaW5faXNfbG9ja2VkKCZwMm0tPmxvY2spOwo+ICsgICAgcmV0dXJuIHJ3X2lz X2xvY2tlZCgmcDJtLT5sb2NrKTsKPiAgfQo+ICAKPiAgdm9pZCBwMm1fZHVtcF9pbmZvKHN0cnVj dCBkb21haW4gKmQpCj4gQEAgLTEzODksNyArMTM4OSw3IEBAIGludCBwMm1faW5pdChzdHJ1Y3Qg ZG9tYWluICpkKQo+ICAgICAgc3RydWN0IHAybV9kb21haW4gKnAybSA9ICZkLT5hcmNoLnAybTsK PiAgICAgIGludCByYyA9IDA7Cj4gIAo+IC0gICAgc3Bpbl9sb2NrX2luaXQoJnAybS0+bG9jayk7 Cj4gKyAgICByd2xvY2tfaW5pdCgmcDJtLT5sb2NrKTsKPiAgICAgIElOSVRfUEFHRV9MSVNUX0hF QUQoJnAybS0+cGFnZXMpOwo+ICAKPiAgICAgIHAybS0+dm1pZCA9IElOVkFMSURfVk1JRDsKPiBk aWZmIC0tZ2l0IGEveGVuL2luY2x1ZGUvYXNtLWFybS9wMm0uaCBiL3hlbi9pbmNsdWRlL2FzbS1h cm0vcDJtLmgKPiBpbmRleCAyMGEyMjBlYS4uYWJkYTcwYyAxMDA2NDQKPiAtLS0gYS94ZW4vaW5j bHVkZS9hc20tYXJtL3AybS5oCj4gKysrIGIveGVuL2luY2x1ZGUvYXNtLWFybS9wMm0uaAo+IEBA IC0zLDYgKzMsNyBAQAo+ICAKPiAgI2luY2x1ZGUgPHhlbi9tbS5oPgo+ICAjaW5jbHVkZSA8eGVu L3JhZGl4LXRyZWUuaD4KPiArI2luY2x1ZGUgPHhlbi9yd2xvY2suaD4KPiAgI2luY2x1ZGUgPHB1 YmxpYy92bV9ldmVudC5oPiAvKiBmb3Igdm1fZXZlbnRfcmVzcG9uc2VfdCAqLwo+ICAjaW5jbHVk ZSA8cHVibGljL21lbW9yeS5oPgo+ICAjaW5jbHVkZSA8eGVuL3AybS1jb21tb24uaD4KPiBAQCAt MjAsNyArMjEsNyBAQCBleHRlcm4gdm9pZCBtZW1vcnlfdHlwZV9jaGFuZ2VkKHN0cnVjdCBkb21h aW4gKik7Cj4gIC8qIFBlci1wMm0tdGFibGUgc3RhdGUgKi8KPiAgc3RydWN0IHAybV9kb21haW4g ewo+ICAgICAgLyogTG9jayB0aGF0IHByb3RlY3RzIHVwZGF0ZXMgdG8gdGhlIHAybSAqLwo+IC0g ICAgc3BpbmxvY2tfdCBsb2NrOwo+ICsgICAgcndsb2NrX3QgbG9jazsKPiAgCj4gICAgICAvKiBQ YWdlcyB1c2VkIHRvIGNvbnN0cnVjdCB0aGUgcDJtICovCj4gICAgICBzdHJ1Y3QgcGFnZV9saXN0 X2hlYWQgcGFnZXM7Cj4gLS0gCj4gMS45LjEKPiAKCl9fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRldmVsQGxp c3RzLnhlbi5vcmcKaHR0cHM6Ly9saXN0cy54ZW4ub3JnL3hlbi1kZXZlbAo=