From mboxrd@z Thu Jan 1 00:00:00 1970 From: Punit Agrawal Subject: Re: [For Xen-4.10 RFC PATCH 3/3] Prevent redundant icache flushes in populate_physmap() Date: Fri, 12 May 2017 13:35:04 +0100 Message-ID: <87k25mnthj.fsf@e105922-lin.cambridge.arm.com> References: <20170331102424.11869-1-punit.agrawal@arm.com> <20170331102424.11869-4-punit.agrawal@arm.com> <9e30e69d-3554-b10a-32d5-e2e63c20167f@arm.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <9e30e69d-3554-b10a-32d5-e2e63c20167f@arm.com> (Julien Grall's message of "Tue, 9 May 2017 16:16:47 +0100") List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xen.org Sender: "Xen-devel" To: Julien Grall Cc: sstabellini@kernel.org, wei.liu2@citrix.com, George.Dunlap@eu.citrix.com, andrew.cooper3@citrix.com, tim@xen.org, xen-devel@lists.xen.org, jbeulich@suse.com, ian.jackson@eu.citrix.com List-Id: xen-devel@lists.xenproject.org SGkgSnVsaWVuLAoKSnVsaWVuIEdyYWxsIDxqdWxpZW4uZ3JhbGxAYXJtLmNvbT4gd3JpdGVzOgoK PiBIaSBQdW5pdCwKPgo+IFNvcnJ5IGZvciB0aGUgbGF0ZSBhbnN3ZXIuCj4KPiBPbiAzMS8wMy8x NyAxMToyNCwgUHVuaXQgQWdyYXdhbCB3cm90ZToKPj4gcG9wdWxhdGVfcGh5c21hcCgpIGNhbGxz IGFsbG9jX2hlYXBfcGFnZXMoKSBwZXIgcmVxdWVzdGVkIGV4dGVudC4gQXMKPj4gYWxsb2NfaGVh cF9wYWdlcygpIHBlcmZvcm1zIGljYWNoZSBtYWludGVuYW5jZSBvcGVyYXRpb25zIGFmZmVjdGlu ZyB0aGUKPj4gZW50aXJlIGluc3RydWN0aW9uIGNhY2hlLCB0aGlzIGxlYWRzIHRvIHJlZHVuZGFu dCBjYWNoZSBmbHVzaGVzIHdoZW4KPj4gYWxsb2NhdGluZyBtdWx0aXBsZSBleHRlbnRzIGluIHBv cHVsYXRlX3BoeXNtYXAoKS4KPj4KPj4gVG8gYWxsZXZpYXRlIHRoaXMgcHJvYmxlbSwgaW50cm9k dWNlIGEgbmV3IGZsYWcgIk1FTUZfbm9faWNhY2hlX2ZsdXNoIgo+PiB3aGljaCBjYW4gYmUgdXNl ZCBwcmV2ZW50IGFsbG9jX2hlYXBfcGFnZXMoKSB0byBwZXJmb3JtIHVubmVjZXNzYXJ5Cj4+IGlj YWNoZSBtYWludGVuYW5jZSBvcGVyYXRpb25zLiBVc2UgdGhlIGZsYWcgaW4gcG9wdWxhdGVfcGh5 c21hcCgpIGFuZAo+PiBwZXJmb3JtIHRoZSByZXF1aXJlZCBpY2FjaGUgbWFpbnRlbmFuY2UgZnVu Y3Rpb24gYXQgdGhlIGVuZCBvZiB0aGUKPj4gb3BlcmF0aW9uLgo+Pgo+PiBTaWduZWQtb2ZmLWJ5 OiBQdW5pdCBBZ3Jhd2FsIDxwdW5pdC5hZ3Jhd2FsQGFybS5jb20+Cj4+IC0tLQo+PiAgeGVuL2Nv bW1vbi9tZW1vcnkuYyAgICAgICAgfCA2ICsrKysrKwo+PiAgeGVuL2NvbW1vbi9wYWdlX2FsbG9j LmMgICAgfCAyICstCj4+ICB4ZW4vaW5jbHVkZS9hc20teDg2L3BhZ2UuaCB8IDQgKysrKwo+PiAg eGVuL2luY2x1ZGUveGVuL21tLmggICAgICAgfCAyICsrCj4+ICA0IGZpbGVzIGNoYW5nZWQsIDEz IGluc2VydGlvbnMoKyksIDEgZGVsZXRpb24oLSkKPj4KPj4gZGlmZiAtLWdpdCBhL3hlbi9jb21t b24vbWVtb3J5LmMgYi94ZW4vY29tbW9uL21lbW9yeS5jCj4+IGluZGV4IGFkMGIzM2NlYjYuLjUw N2YzNjM5MjQgMTAwNjQ0Cj4+IC0tLSBhL3hlbi9jb21tb24vbWVtb3J5LmMKPj4gKysrIGIveGVu L2NvbW1vbi9tZW1vcnkuYwo+PiBAQCAtMTYyLDYgKzE2Miw4IEBAIHN0YXRpYyB2b2lkIHBvcHVs YXRlX3BoeXNtYXAoc3RydWN0IG1lbW9wX2FyZ3MgKmEpCj4+ICAgICAgaWYgKCB1bmxpa2VseSgh ZC0+Y3JlYXRpb25fZmluaXNoZWQpICkKPj4gICAgICAgICAgYS0+bWVtZmxhZ3MgfD0gTUVNRl9u b190bGJmbHVzaDsKPj4KPj4gKyAgICBhLT5tZW1mbGFncyB8PSBNRU1GX25vX2ljYWNoZV9mbHVz aDsKPj4gKwo+PiAgICAgIGZvciAoIGkgPSBhLT5ucl9kb25lOyBpIDwgYS0+bnJfZXh0ZW50czsg aSsrICkKPj4gICAgICB7Cj4+ICAgICAgICAgIGlmICggaSAhPSBhLT5ucl9kb25lICYmIGh5cGVy Y2FsbF9wcmVlbXB0X2NoZWNrKCkgKQo+PiBAQCAtMjUzLDYgKzI1NSwxMCBAQCBzdGF0aWMgdm9p ZCBwb3B1bGF0ZV9waHlzbWFwKHN0cnVjdCBtZW1vcF9hcmdzICphKQo+PiAgb3V0Ogo+PiAgICAg IGlmICggbmVlZF90bGJmbHVzaCApCj4+ICAgICAgICAgIGZpbHRlcmVkX2ZsdXNoX3RsYl9tYXNr KHRsYmZsdXNoX3RpbWVzdGFtcCk7Cj4+ICsKPj4gKyAgICBpZiAoIGEtPm1lbWZsYWdzICYgTUVN Rl9ub19pY2FjaGVfZmx1c2ggKQo+PiArICAgICAgICBpbnZhbGlkYXRlX2ljYWNoZSgpOwo+Cj4g SSB0aGluayBpdCB3b3VsZCBiZSBnb29kIHRvIGV4cGxhaW4gd2h5IGl0IGlzIGFsd2F5cyBmaW5l IHRvIGRlZmVyIHRoZQo+IGNhY2hlIGludmFsaWRhdGlvbiBmcm9tIGEgc2VjdXJpdHkgcG9pbnQg b2YgdmlldyBmb3IgZnV0dXJlCj4gcmVmZXJlbmNlLiBUaGlzIHdvdWxkIGhlbHAgdXMgaW4gdGhl IGZ1dHVyZSB0byBrbm93IHdoeSB3ZSBtYWRlIHRoaXMKPiBjaG9pY2UuCgpUaGFua3MgZm9yIHJh aXNpbmcgdGhpcy4KCkRpc2N1c3NpbmcgdGhpcyB3aXRoIGZvbGtzIGZhbWlsaWFyIHdpdGggQVJN LCBpdCB0dXJucyBvdXQgdGhhdApkZWZlcnJpbmcgaWNhY2hlIGludmFsaWRhdGlvbnMgcmlza3Mg b3RoZXIgVkNQVXMgdG8gZXhlY3V0ZSBmcm9tIHN0YWxlCmNhY2hlcy4gV2UgZG9uJ3QgcmVhbGx5 IHdhbnQgdG8gZGVidWcgaXNzdWVzIGZyb20gdGhpcy4gOikKCkJhc2VkIG9uIHlvdXIgc3VnZ2Vz dGlvbiAob2ZmbGlzdCksIEknbSBnb2luZyB0byB0cnkgYW5kIHJlc3RyaWN0CmRlbGF5aW5nIGlj YWNoZSBpbnZhbGlkYXRpb25zIG9ubHkgZHVyaW5nIGRvbWFpbiBjcmVhdGlvbi4KCkknbGwgd29y ayBvbiBnZXR0aW5nIGEgbmV3IHZlcnNpb24gb3V0IGluIHRoZSBuZXh0IGRheSBvciBzby4KCj4K PiBDaGVlcnMsCgpfX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f XwpYZW4tZGV2ZWwgbWFpbGluZyBsaXN0Clhlbi1kZXZlbEBsaXN0cy54ZW4ub3JnCmh0dHBzOi8v bGlzdHMueGVuLm9yZy94ZW4tZGV2ZWwK