From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefano Stabellini Subject: Re: [PATCH v4 7/7] xen/arm: disable CPUs with different dcache line sizes Date: Tue, 6 Mar 2018 11:41:07 -0800 (PST) Message-ID: References: <1520017568-24427-1-git-send-email-sstabellini@kernel.org> <1520017568-24427-7-git-send-email-sstabellini@kernel.org> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Julien Grall Cc: Stefano Stabellini , xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org T24gVHVlLCA2IE1hciAyMDE4LCBKdWxpZW4gR3JhbGwgd3JvdGU6Cj4gSGkgU3RlZmFubywKPiAK PiBTb21ldGhpbmcgaXMgd3Jvbmcgd2l0aCB5b3VyIHRocmVhZGluZyBhZ2Fpbi4gUGF0Y2ggIzIt NyBoYXZlICJJbi1SZXBseS1UbyIKPiBtYXRjaGluZyBwYXRjaCAjMSBhbmQgbm90IHRoZSBjb3Zl ciBsZXR0ZXIuCgpUaGFua3MsIEkgbG9zdCBteSBnaXQgY29uZmlndXJhdGlvbi4KCgo+IE9uIDAy LzAzLzE4IDE5OjA2LCBTdGVmYW5vIFN0YWJlbGxpbmkgd3JvdGU6Cj4gPiBFdmVuIGRpZmZlcmVu dCBjcHVzIGluIGJpZy5MSVRUTEUgc3lzdGVtcyBhcmUgZXhwZWN0ZWQgdG8gaGF2ZSB0aGUgc2Ft ZQo+ID4gZGNhY2hlIGxpbmUgc2l6ZS4gVW5sZXNzIHRoZSBtaW5pbXVtIG9mIGFsbCBkY2FjaGUg bGluZSBzaXplcyBpcyB1c2VkCj4gPiBhY3Jvc3MgYWxsIGNwdSBjb3JlcywgY2FjaGUgY29oZXJl bmN5IHByb3RvY29scyBjYW4gZ28gd3JvbmcuIEluc3RlYWQsCj4gPiBmb3Igbm93LCBqdXN0IGRp c2FibGUgYW55IGNwdSB3aXRoIGEgZGlmZmVyZW50IGRjYWNoZSBsaW5lIHNpemUuCj4gPiAKPiA+ IFRoaXMgY2hlY2sgaXMgbm90IGNvdmVyZWQgYnkgdGhlIGhtcC11bnNhZmUgb3B0aW9uLCBiZWNh dXNlIGV2ZW4gd2l0aAo+ID4gdGhlIGNvcnJlY3Qgc2NoZWR1bGluZyBhbmQgdmNwdSBwaW5uaW5n IGluIHBsYWNlLCB0aGUgc3lzdGVtIGJyZWFrcyBpZgo+ID4gZGNhY2hlIGxpbmUgc2l6ZXMgZGlm ZmVyIGFjcm9zcyBjb3Jlcy4gV2UgZG9uJ3QgYmVsaWV2ZSBpdCBpcyBhIHByb2JsZW0KPiA+IGZv ciBtb3N0IGJpZy5MSVRUTEUgc3lzdGVtcy4KPiA+IAo+ID4gVGhpcyBwYXRjaCBtb3ZlcyB0aGUg aW1wbGVtZW50YXRpb24gb2Ygc2V0dXBfY2FjaGUgdG8gYSBzdGF0aWMgaW5saW5lLAo+ID4gc3Rp bGwgc2V0dGluZyBkY2FjaGVfbGluZV9ieXRlcyBhdCB0aGUgYmVnaW5uaW5nIG9mIHN0YXJ0X3hl biBhcwo+ID4gYmVmb3JlLgo+ID4gCj4gPiBJbiBzdGFydF9zZWNvbmRhcnkgd2UgY2hlY2sgdGhh dCB0aGUgZGNhY2hlIGxldmVsIDEgbGluZSBzaXplcyBtYXRjaCwKPiA+IG90aGVyd2lzZSB3ZSBk aXNhYmxlIHRoZSBjcHUuCj4gPiAKPiA+IFN1Z2dlc3RlZC1ieTogSnVsaWVuIEdyYWxsIDxqdWxp ZW4uZ3JhbGxAYXJtLmNvbT4KPiA+IFNpZ25lZC1vZmYtYnk6IFN0ZWZhbm8gU3RhYmVsbGluaSA8 c3N0YWJlbGxpbmlAa2VybmVsLm9yZz4KPiA+IAo+ID4gLS0tCj4gPiBDaGFuZ2VzIGluIHY0Ogo+ ID4gLSBpbXByb3ZlIGNvbW1pdCBtZXNzYWdlCj4gPiAtIHVzZSAlenUKPiA+IC0tLQo+ID4gICB4 ZW4vYXJjaC9hcm0vc2V0dXAuYyAgICAgICB8IDE0ICstLS0tLS0tLS0tLS0tCj4gPiAgIHhlbi9h cmNoL2FybS9zbXBib290LmMgICAgIHwgIDggKysrKysrKysKPiA+ICAgeGVuL2luY2x1ZGUvYXNt LWFybS9wYWdlLmggfCAxMSArKysrKysrKysrKwo+ID4gICAzIGZpbGVzIGNoYW5nZWQsIDIwIGlu c2VydGlvbnMoKyksIDEzIGRlbGV0aW9ucygtKQo+ID4gCj4gPiBkaWZmIC0tZ2l0IGEveGVuL2Fy Y2gvYXJtL3NldHVwLmMgYi94ZW4vYXJjaC9hcm0vc2V0dXAuYwo+ID4gaW5kZXggZmNlZDc1YS4u NmNjZmRhYiAxMDA2NDQKPiA+IC0tLSBhL3hlbi9hcmNoL2FybS9zZXR1cC5jCj4gPiArKysgYi94 ZW4vYXJjaC9hcm0vc2V0dXAuYwo+ID4gQEAgLTY4MiwxOCArNjgyLDYgQEAgc3RhdGljIHZvaWQg X19pbml0IHNldHVwX21tKHVuc2lnbmVkIGxvbmcgZHRiX3BhZGRyLAo+ID4gc2l6ZV90IGR0Yl9z aXplKQo+ID4gICAgIHNpemVfdCBfX3JlYWRfbW9zdGx5IGRjYWNoZV9saW5lX2J5dGVzOwo+ID4g ICAtLyogVmVyeSBlYXJseSBjaGVjayBvZiB0aGUgQ1BVIGNhY2hlIHByb3BlcnRpZXMgKi8KPiA+ IC12b2lkIF9faW5pdCBzZXR1cF9jYWNoZSh2b2lkKQo+ID4gLXsKPiA+IC0gICAgdWludDMyX3Qg Y3RyOwo+ID4gLQo+ID4gLSAgICAvKiBSZWFkIENUUiAqLwo+ID4gLSAgICBjdHIgPSBSRUFEX1NZ U1JFRzMyKENUUl9FTDApOwo+ID4gLQo+ID4gLSAgICAvKiBCaXRzIDE2LTE5IGFyZSB0aGUgbG9n MiBudW1iZXIgb2Ygd29yZHMgaW4gdGhlIGNhY2hlbGluZS4gKi8KPiA+IC0gICAgZGNhY2hlX2xp bmVfYnl0ZXMgPSAoc2l6ZV90KSAoNCA8PCAoKGN0ciA+PiAxNikgJiAweGYpKTsKPiA+IC19Cj4g PiAtCj4gPiAgIC8qIEMgZW50cnkgcG9pbnQgZm9yIGJvb3QgQ1BVICovCj4gPiAgIHZvaWQgX19p bml0IHN0YXJ0X3hlbih1bnNpZ25lZCBsb25nIGJvb3RfcGh5c19vZmZzZXQsCj4gPiAgICAgICAg ICAgICAgICAgICAgICAgICB1bnNpZ25lZCBsb25nIGZkdF9wYWRkciwKPiA+IEBAIC03MDcsNyAr Njk1LDcgQEAgdm9pZCBfX2luaXQgc3RhcnRfeGVuKHVuc2lnbmVkIGxvbmcgYm9vdF9waHlzX29m ZnNldCwKPiA+ICAgICAgIHN0cnVjdCBkb21haW4gKmRvbTA7Cj4gPiAgICAgICBzdHJ1Y3QgeGVu X2FyY2hfZG9tYWluY29uZmlnIGNvbmZpZzsKPiA+ICAgLSAgICBzZXR1cF9jYWNoZSgpOwo+ID4g KyAgICBkY2FjaGVfbGluZV9ieXRlcyA9IHJlYWRfZGNhY2hlX2xpbmVfc2l6ZSgpOwo+IAo+IEl0 IGZlZWxzIGEgYml0IG9kZCB0byBoYXZlIG9uZSBjYWxsIGRjYWNoZV9saW5lX2J5dGVzIGFuZCB0 aGUgb3RoZXIgY2FsbAo+IHJlYWRfZGNhY2hlX2xpbmVfc2l6ZS4gV291bGQgaXQgYmUgcG9zc2li bGUgdG8gdW5pZm9ybWl6ZSB0aGUgbmFtZT8KPiAKPiBXaXRoIHRoYXQ6Cj4gCj4gUmV2aWV3ZWQt Ynk6IEp1bGllbiBHcmFsbCA8anVsaWVuLmdyYWxsQGFybS5jb20+CgpJIGZpeGVkIHRoYXQgYW5k IHRoZSBvdGhlciBpbi1jb2RlIGNvbW1lbnQsIGFuZCBjb21taXR0ZWQgdGhlIHdob2xlCnNlcmll cywgdGhhbmtzIQoKCj4gPiAgICAgICAgIHBlcmNwdV9pbml0X2FyZWFzKCk7Cj4gPiAgICAgICBz ZXRfcHJvY2Vzc29yX2lkKDApOyAvKiBuZWVkZWQgZWFybHksIGZvciBzbXBfcHJvY2Vzc29yX2lk KCkgKi8KPiA+IGRpZmYgLS1naXQgYS94ZW4vYXJjaC9hcm0vc21wYm9vdC5jIGIveGVuL2FyY2gv YXJtL3NtcGJvb3QuYwo+ID4gaW5kZXggMDRlZmIzMy4uZDE1MjMwYiAxMDA2NDQKPiA+IC0tLSBh L3hlbi9hcmNoL2FybS9zbXBib290LmMKPiA+ICsrKyBiL3hlbi9hcmNoL2FybS9zbXBib290LmMK PiA+IEBAIC0zMjMsNiArMzIzLDE0IEBAIHZvaWQgc3RhcnRfc2Vjb25kYXJ5KHVuc2lnbmVkIGxv bmcgYm9vdF9waHlzX29mZnNldCwKPiA+ICAgICAgICAgICBzdG9wX2NwdSgpOwo+ID4gICAgICAg fQo+ID4gICArICAgIGlmICggZGNhY2hlX2xpbmVfYnl0ZXMgIT0gcmVhZF9kY2FjaGVfbGluZV9z aXplKCkgKQo+ID4gKyAgICB7Cj4gPiArICAgICAgICBwcmludGsoWEVOTE9HX0VSUiAiQ1BVJXUg ZGNhY2hlIGxpbmUgc2l6ZSAoJXp1KSBkb2VzIG5vdCBtYXRjaCB0aGUKPiA+IGJvb3QgQ1BVICgl enUpXG4iLAo+ID4gKyAgICAgICAgICAgICAgIHNtcF9wcm9jZXNzb3JfaWQoKSwgcmVhZF9kY2Fj aGVfbGluZV9zaXplKCksCj4gPiArICAgICAgICAgICAgICAgZGNhY2hlX2xpbmVfYnl0ZXMpOwo+ ID4gKyAgICAgICAgc3RvcF9jcHUoKTsKPiA+ICsgICAgfQo+ID4gKwo+ID4gICAgICAgbW11X2lu aXRfc2Vjb25kYXJ5X2NwdSgpOwo+ID4gICAgICAgICBnaWNfaW5pdF9zZWNvbmRhcnlfY3B1KCk7 Cj4gPiBkaWZmIC0tZ2l0IGEveGVuL2luY2x1ZGUvYXNtLWFybS9wYWdlLmggYi94ZW4vaW5jbHVk ZS9hc20tYXJtL3BhZ2UuaAo+ID4gaW5kZXggY2UxOGYwYy4uZTUzOWY4MyAxMDA2NDQKPiA+IC0t LSBhL3hlbi9pbmNsdWRlL2FzbS1hcm0vcGFnZS5oCj4gPiArKysgYi94ZW4vaW5jbHVkZS9hc20t YXJtL3BhZ2UuaAo+ID4gQEAgLTEzOCw2ICsxMzgsMTcgQEAgZXh0ZXJuIHNpemVfdCBkY2FjaGVf bGluZV9ieXRlczsKPiA+ICAgICAjZGVmaW5lIGNvcHlfcGFnZShkcCwgc3ApIG1lbWNweShkcCwg c3AsIFBBR0VfU0laRSkKPiA+ICAgK3N0YXRpYyBpbmxpbmUgc2l6ZV90IHJlYWRfZGNhY2hlX2xp bmVfc2l6ZSh2b2lkKQo+ID4gK3sKPiA+ICsgICAgdWludDMyX3QgY3RyOwo+ID4gKwo+ID4gKyAg ICAvKiBSZWFkIENUUiAqLwo+ID4gKyAgICBjdHIgPSBSRUFEX1NZU1JFRzMyKENUUl9FTDApOwo+ ID4gKwo+ID4gKyAgICAvKiBCaXRzIDE2LTE5IGFyZSB0aGUgbG9nMiBudW1iZXIgb2Ygd29yZHMg aW4gdGhlIGNhY2hlbGluZS4gKi8KPiA+ICsgICAgcmV0dXJuIChzaXplX3QpICg0IDw8ICgoY3Ry ID4+IDE2KSAmIDB4ZikpOwo+ID4gK30KPiA+ICsKPiA+ICAgLyogRnVuY3Rpb25zIGZvciBmbHVz aGluZyBtZWRpdW0tc2l6ZWQgYXJlYXMuCj4gPiAgICAqIGlmICdyYW5nZScgaXMgbGFyZ2UgZW5v dWdoIHdlIG1pZ2h0IHdhbnQgdG8gdXNlIG1vZGVsLXNwZWNpZmljCj4gPiAgICAqIGZ1bGwtY2Fj aGUgZmx1c2hlcy4gKi8KPiA+IAo+IAo+IENoZWVycywKPiAKPiAtLSAKPiBKdWxpZW4gR3JhbGwK PiAKCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fClhlbi1k ZXZlbCBtYWlsaW5nIGxpc3QKWGVuLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0dHBzOi8v bGlzdHMueGVucHJvamVjdC5vcmcvbWFpbG1hbi9saXN0aW5mby94ZW4tZGV2ZWw=