From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefano Stabellini Subject: Re: [PATCH v6 1/7] xen: xsm: flask: introduce XENMAPSPACE_gmfn_share for memory sharing Date: Thu, 2 Aug 2018 13:57:07 -0700 (PDT) Message-ID: References: <1533061389-6504-1-git-send-email-sstabellini@kernel.org> <5B6171CE02000078001D9C39@prv1-mh.provo.novell.com> <5B62A8E802000078001DA1FA@prv1-mh.provo.novell.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: In-Reply-To: <5B62A8E802000078001DA1FA@prv1-mh.provo.novell.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Jan Beulich Cc: Tim Deegan , Stefano Stabellini , Wei Liu , Sky Liu , George Dunlap , Andrew Cooper , Stefano Stabellini , Ian Jackson , xen-devel@lists.xen.org, Julien Grall , Daniel de Graaf List-Id: xen-devel@lists.xenproject.org T24gVGh1LCAyIEF1ZyAyMDE4LCBKYW4gQmV1bGljaCB3cm90ZToKPiA+PiA+ICsvKgo+ID4+ID4g KyAqIFRoaXMgYWN0aW9uIGFsc28gcmVxdWlyZXMgdGhhdCBAY3VycmVudCB0YXJnZXRzIEBkLCBi dXQgaXQgaGFzIGFscmVhZHkgYmVlbgo+ID4+ID4gKyAqIGNoZWNrZWQgc29tZXdoZXJlIGhpZ2hl ciBpbiB0aGUgY2FsbCBzdGFjay4KPiA+PiAKPiA+PiBJJ20gbm90IGNvbnZpbmNlZCBpdCBpcyBh IGdvb2QgaWRlYSB0byBoYXZlIHN1Y2ggYSBkZXBlbmRlbmN5LCBldmVuCj4gPj4gbW9yZSBzbyB3 aXRoIHRoaXMgY2xvdWR5IGEgcmVmZXJlbmNlLiBJZiB0aGVyZSdzIGFub3RoZXIgWFNNIGNoZWNr Cj4gPj4gdGhhdCBoYXMgbmVjZXNzYXJpbHkgYmVlbiBkb25lIGJlZm9yZSwgeW91IHNob3VsZCBh dCBsZWFzdCBuYW1lIGl0Cj4gPj4gaGVyZSBzbyBpdCdzIGVhc3kgdG8gbGF0ZXIgdmVyaWZ5IHRo YXQgdGhlIGFzc3VtcHRpb24gc3RpbGwgaG9sZHMuIEJ1dAo+ID4+IGV2ZW4gYmV0dGVyIHdvdWxk IGltbyBiZSB0byByZS1kbyB0aGUgY2hlY2sgaGVyZSwganVzdCBpbiBjYXNlLgo+ID4gCj4gPiBJ IGFtIGZpbmUgd2l0aCB0aGF0LiBJdCBzaG91bGQgYmUganVzdCBhIG1hdHRlciBvZiBkb2luZyB0 aGUgZm9sbG93aW5nLAo+ID4gcmlnaHQ/Cj4gPiAKPiA+IHN0YXRpYyBYU01fSU5MSU5FIGludCB4 c21fbWFwX2dtZm5fc2hhcmUoWFNNX0RFRkFVTFRfQVJHIHN0cnVjdCBkb21haW4gKmQsCj4gPiAg ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgIHN0cnVjdCBkb21haW4gKnQp Cj4gPiB7Cj4gPiAgICAgWFNNX0FTU0VSVF9BQ1RJT04oWFNNX1RBUkdFVCk7Cj4gPiAgICAgcmV0 dXJuIHhzbV9kZWZhdWx0X2FjdGlvbihYU01fVEFSR0VULCBjdXJyZW50LT5kb21haW4sIGQpICYm Cj4gPiAgICAgICAgICAgIHhzbV9kZWZhdWx0X2FjdGlvbihhY3Rpb24sIGN1cnJlbnQtPmRvbWFp biwgdCk7Cj4gCj4gTm90IGV4YWN0bHkgLSB4c21fZGVmYXVsdF9hY3Rpb24oKSBkb2Vzbid0IHJl dHVybiBib29sZWFuLCBub3Igc2hvdWxkCj4gdGhlIGZ1bmN0aW9uIGhlcmUuCgpZb3UgYXJlIHJp Z2h0LCB6ZXJvIGlzIHN1Y2Nlc3MuIFNvIHNvbWV0aGluZyBsaWtlIHRoZSBmb2xsb3dpbmc6Cgog ICAgaW50IHJjID0geHNtX2RlZmF1bHRfYWN0aW9uKFhTTV9UQVJHRVQsIGN1cnJlbnQtPmRvbWFp biwgZCk7CiAgICBpZiAoIHJjICkKICAgICAgICByZXR1cm4gcmM7CiAgICByZXR1cm4geHNtX2Rl ZmF1bHRfYWN0aW9uKGFjdGlvbiwgY3VycmVudC0+ZG9tYWluLCB0KTsKCgo+ID4+ID4gLS0tIGEv eGVuL3hzbS9mbGFzay9ob29rcy5jCj4gPj4gPiArKysgYi94ZW4veHNtL2ZsYXNrL2hvb2tzLmMK PiA+PiA+IEBAIC0xMTk4LDYgKzExOTgsMTcgQEAgc3RhdGljIGludCBmbGFza19tYXBfZ21mbl9m b3JlaWduKHN0cnVjdCBkb21haW4gKmQsIHN0cnVjdCBkb21haW4gKnQpCj4gPj4gPiAgICAgIHJl dHVybiBkb21haW5faGFzX3Blcm0oZCwgdCwgU0VDQ0xBU1NfTU1VLCBNTVVfX01BUF9SRUFEIHwg TU1VX19NQVBfV1JJVEUpOwo+ID4+ID4gIH0KPiA+PiA+ICAKPiA+PiA+ICsvKgo+ID4+ID4gKyAq IFRoaXMgYWN0aW9uIGFsc28gcmVxdWlyZXMgdGhhdCBAY3VycmVudCBoYXMgTU1VX19NQVBfUkVB RC9XUklURSBvdmVyIEBkLAo+ID4+ID4gKyAqIGJ1dCB0aGF0IGhhcyBhbHJlYWR5IGJlZW4gY2hl Y2tlZCBzb21ld2hlcmUgaGlnaGVyIGluIHRoZSBjYWxsIHN0YWNrIChmb3IKPiA+PiA+ICsgKiBl eGFtcGxlLCBieSBmbGFza19hZGRfdG9fcGh5c21hcCgpKS4KPiA+PiAKPiA+PiBUaGlzIG9uZSdz IGJldHRlciBpbiB0aGF0IGl0IGF0IGxlYXN0IG5hbWVzIHRoZSBvdGhlciBob29rLiBTdGlsbCBJ J20KPiA+PiBub3QgZnVsbHkgY29udmluY2VkIHRoYXQgb21pdHRpbmcgdGhlIG90aGVyIGhhbGYg b2YgdGhlIGNoZWNrIGhlcmUKPiA+PiBpcyBwcnVkZW50LiBXZSdsbCBzZWUgd2hhdCBvdGhlcnMg dGhpbmsgLi4uCj4gPiAKPiA+IFN1cmUsIGl0IHNob3VsZCBiZSBzaW1wbGUgdG8gY2hhbmdlIChJ IGhvcGUgSSBhbSBub3QgbWlzc2luZyBzb21ldGhpbmcpLgo+ID4gCj4gPiBzdGF0aWMgaW50IGZs YXNrX21hcF9nbWZuX3NoYXJlKHN0cnVjdCBkb21haW4gKmQsIHN0cnVjdCBkb21haW4gKnQpCj4g PiB7Cj4gPiAgIHJldHVybiBjdXJyZW50X2hhc19wZXJtKGQsIFNFQ0NMQVNTX01NVSwgTU1VX19N QVBfUkVBRCB8IE1NVV9fTUFQX1dSSVRFKSAmJgo+ID4gICAgICAgICAgKGN1cnJlbnRfaGFzX3Bl cm0odCwgU0VDQ0xBU1NfTU1VLCBNTVVfX01BUF9SRUFEIHwgTU1VX19NQVBfV1JJVEUpIAo+ID4g PzoKPiA+ICAgICAgICAgICBkb21haW5faGFzX3Blcm0oZCwgdCwgU0VDQ0xBU1NfTU1VLCBNTVVf X1NIQVJFX01FTSkpOwo+IAo+IFNhbWUgaGVyZSBhZmFpY3QuCgpZZXA6CgogICAgaW50IHJjID0g Y3VycmVudF9oYXNfcGVybShkLCBTRUNDTEFTU19NTVUsIE1NVV9fTUFQX1JFQUQgfCBNTVVfX01B UF9XUklURSk7CiAgICBpZiAoIHJjICkKICAgICAgICByZXR1cm4gcmM7CiAgICByYyA9IGN1cnJl bnRfaGFzX3Blcm0odCwgU0VDQ0xBU1NfTU1VLCBNTVVfX01BUF9SRUFEIHwgTU1VX19NQVBfV1JJ VEUpOwogICAgaWYgKCByYyApCiAgICAgICAgcmV0dXJuIHJjOwogICAgcmV0dXJuIGRvbWFpbl9o YXNfcGVybShkLCB0LCBTRUNDTEFTU19NTVUsIE1NVV9fU0hBUkVfTUVNKTsKCl9fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxp c3QKWGVuLWRldmVsQGxpc3RzLnhlbnByb2plY3Qub3JnCmh0dHBzOi8vbGlzdHMueGVucHJvamVj dC5vcmcvbWFpbG1hbi9saXN0aW5mby94ZW4tZGV2ZWw=