From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefano Stabellini Subject: Re: [RFC] virtio_ring: check dma_mem for xen_domain Date: Tue, 22 Jan 2019 11:59:31 -0800 (PST) Message-ID: References: <20190121050056.14325-1-peng.fan@nxp.com> Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Return-path: Received: from us1-rack-dfw2.inumbo.com ([104.130.134.6]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1gm2D0-0007Wn-CZ for xen-devel@lists.xenproject.org; Tue, 22 Jan 2019 19:59:42 +0000 In-Reply-To: <20190121050056.14325-1-peng.fan@nxp.com> List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" To: Peng Fan Cc: jgross@suse.com, "sstabellini@kernel.org" , "mst@redhat.com" , "jasowang@redhat.com" , "linux-remoteproc@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "virtualization@lists.linux-foundation.org" , "hch@infradead.org" , luto@kernel.org, "xen-devel@lists.xenproject.org" , boris.ostrovsky@oracle.com List-Id: xen-devel@lists.xenproject.org T24gTW9uLCAyMSBKYW4gMjAxOSwgUGVuZyBGYW4gd3JvdGU6Cj4gb24gaS5NWDhRTSwgTTRfMSBp cyBjb21tdW5pY2F0aW5nIHdpdGggRG9tVSB1c2luZyBycG1zZyB3aXRoIGEgZml4ZWQKPiBhZGRy ZXNzIGFzIHRoZSBkbWEgbWVtIGJ1ZmZlciB3aGljaCBpcyBwcmVkZWZpbmVkLgo+IAo+IFdpdGhv dXQgdGhpcyBwYXRjaCwgdGhlIGZsb3cgaXM6Cj4gdnJpbmdfbWFwX29uZV9zZyAtPiB2cmluZ191 c2VfZG1hX2FwaQo+ICAgICAgICAgICAgICAgICAgLT4gZG1hX21hcF9wYWdlCj4gCQkgICAgICAg LT4gX19zd2lvdGxiX21hcF9wYWdlCj4gCQkgICAgICAgICAgICAgICAgLT5zd2lvdGxiX21hcF9w YWdlCj4gCQkJCS0+X19kbWFfbWFwX2FyZWEocGh5c190b192aXJ0KGRtYV90b19waHlzKGRldiwg ZGV2X2FkZHIpKSwgc2l6ZSwgZGlyKTsKPiBIb3dldmVyIHdlIGFyZSB1c2luZyBwZXIgZGV2aWNl IGRtYSBhcmVhIGZvciBycG1zZywgcGh5c190b192aXJ0Cj4gY291bGQgbm90IHJldHVybiBhIGNv cnJlY3QgdmlydHVhbCBhZGRyZXNzIGZvciB2aXJ0dWFsIGFkZHJlc3MgaW4KPiB2bWFsbG9jIGFy ZWEuIFRoZW4ga2VybmVsIHBhbmljLgo+IAo+IFdpdGggdGhpcyBwYXRjaCwgdnJpbmdfdXNlX2Rt YV9hcGkgd2lsbCByZXR1cm4gZmFsc2UsIGFuZAo+IHZyaW5nX21hcF9vbmVfc2cgd2lsbCByZXR1 cm4gc2dfcGh5cyhzZykgd2hpY2ggaXMgdGhlIGNvcnJlY3QgcGh5cwo+IGFkZHJlc3MgaW4gdGhl IHByZWRlZmluZWQgbWVtb3J5IHJlZ2lvbi4KPiB2cmluZ19tYXBfb25lX3NnIC0+IHZyaW5nX3Vz ZV9kbWFfYXBpCj4gICAgICAgICAgICAgICAgICAtPiBzZ19waHlzKHNnKQo+IAo+IFNpZ25lZC1v ZmYtYnk6IFBlbmcgRmFuIDxwZW5nLmZhbkBueHAuY29tPgo+IC0tLQo+ICBkcml2ZXJzL3ZpcnRp by92aXJ0aW9fcmluZy5jIHwgNCArKystCj4gIDEgZmlsZSBjaGFuZ2VkLCAzIGluc2VydGlvbnMo KyksIDEgZGVsZXRpb24oLSkKPiAKPiBkaWZmIC0tZ2l0IGEvZHJpdmVycy92aXJ0aW8vdmlydGlv X3JpbmcuYyBiL2RyaXZlcnMvdmlydGlvL3ZpcnRpb19yaW5nLmMKPiBpbmRleCBjZDdlNzU1NDg0 ZTMuLjg5OTNkN2NiMzU5MiAxMDA2NDQKPiAtLS0gYS9kcml2ZXJzL3ZpcnRpby92aXJ0aW9fcmlu Zy5jCj4gKysrIGIvZHJpdmVycy92aXJ0aW8vdmlydGlvX3JpbmcuYwo+IEBAIC0yNDgsNiArMjQ4 LDggQEAgc3RhdGljIGlubGluZSBib29sIHZpcnRxdWV1ZV91c2VfaW5kaXJlY3Qoc3RydWN0IHZp cnRxdWV1ZSAqX3ZxLAo+ICAKPiAgc3RhdGljIGJvb2wgdnJpbmdfdXNlX2RtYV9hcGkoc3RydWN0 IHZpcnRpb19kZXZpY2UgKnZkZXYpCj4gIHsKPiArCXN0cnVjdCBkZXZpY2UgKmRtYV9kZXYgPSB2 ZGV2LT5kZXYucGFyZW50Owo+ICsKPiAgCWlmICghdmlydGlvX2hhc19pb21tdV9xdWlyayh2ZGV2 KSkKPiAgCQlyZXR1cm4gdHJ1ZTsKPiAgCj4gQEAgLTI2MCw3ICsyNjIsNyBAQCBzdGF0aWMgYm9v bCB2cmluZ191c2VfZG1hX2FwaShzdHJ1Y3QgdmlydGlvX2RldmljZSAqdmRldikKPiAgCSAqIHRo ZSBETUEgQVBJIGlmIHdlJ3JlIGEgWGVuIGd1ZXN0LCB3aGljaCBhdCBsZWFzdCBhbGxvd3MKPiAg CSAqIGFsbCBvZiB0aGUgc2Vuc2libGUgWGVuIGNvbmZpZ3VyYXRpb25zIHRvIHdvcmsgY29ycmVj dGx5Lgo+ICAJICovCj4gLQlpZiAoeGVuX2RvbWFpbigpKQo+ICsJaWYgKHhlbl9kb21haW4oKSAm JiAhZG1hX2Rldi0+ZG1hX21lbSkKPiAgCQlyZXR1cm4gdHJ1ZTsKPiAgCj4gIAlyZXR1cm4gZmFs c2U7CgpJIGNhbiBzZWUgeW91IHNwb3R0ZWQgYSByZWFsIGlzc3VlLCBidXQgdGhpcyBpcyBub3Qg dGhlIHJpZ2h0IGZpeC4gV2UKanVzdCBuZWVkIHNvbWV0aGluZyBhIGJpdCBtb3JlIGZsZXhpYmxl IHRoYW4geGVuX2RvbWFpbigpOiB0aGVyZSBhcmUKbWFueSBraW5kcyBvZiBYZW4gZG9tYWlucyBv biBkaWZmZXJlbnQgYXJjaGl0ZWN0dXJlcywgd2UgYmFzaWNhbGx5IHdhbnQKdG8gZW5hYmxlIHRo aXMgKHJldHVybiB0cnVlIGZyb20gdnJpbmdfdXNlX2RtYV9hcGkpIG9ubHkgd2hlbiB0aGUgeGVu CnN3aW90bGIgaXMgbWVhbnQgdG8gYmUgdXNlZC4gRG9lcyB0aGUgYXBwZW5kZWQgcGF0Y2ggZml4 IHRoZSBpc3N1ZSB5b3UKaGF2ZT8KCi0tLQoKeGVuOiBpbnRyb2R1Y2UgeGVuX3ZyaW5nX3VzZV9k bWEKCkZyb206IFN0ZWZhbm8gU3RhYmVsbGluaSA8c3RlZmFub3NAeGlsaW54LmNvbT4KCkV4cG9y dCB4ZW5fc3dpb3RsYiBvbiBhcm0gYW5kIGFybTY0LgoKVXNlIHhlbl9zd2lvdGxiIHRvIGRldGVy bWluZSB3aGVuIHZyaW5nIHNob3VsZCB1c2UgZG1hIEFQSXMgdG8gbWFwIHRoZQpyaW5nOiB3aGVu IHhlbl9zd2lvdGxiIGlzIGVuYWJsZWQgdGhlIGRtYSBBUEkgaXMgcmVxdWlyZWQuIFdoZW4gaXQg aXMKZGlzYWJsZWQsIGl0IGlzIG5vdCByZXF1aXJlZC4KClJlcG9ydGVkLWJ5OiBQZW5nIEZhbiA8 cGVuZy5mYW5AbnhwLmNvbT4KU2lnbmVkLW9mZi1ieTogU3RlZmFubyBTdGFiZWxsaW5pIDxzdGVm YW5vc0B4aWxpbnguY29tPgoKZGlmZiAtLWdpdCBhL2FyY2gvYXJtL2luY2x1ZGUvYXNtL3hlbi9z d2lvdGxiLXhlbi5oIGIvYXJjaC9hcm0vaW5jbHVkZS9hc20veGVuL3N3aW90bGIteGVuLmgKbmV3 IGZpbGUgbW9kZSAxMDA2NDQKaW5kZXggMDAwMDAwMC4uNDU1YWRlNQotLS0gL2Rldi9udWxsCisr KyBiL2FyY2gvYXJtL2luY2x1ZGUvYXNtL3hlbi9zd2lvdGxiLXhlbi5oCkBAIC0wLDAgKzEgQEAK KyNpbmNsdWRlIDx4ZW4vYXJtL3N3aW90bGIteGVuLmg+CmRpZmYgLS1naXQgYS9hcmNoL2FybS94 ZW4vbW0uYyBiL2FyY2gvYXJtL3hlbi9tbS5jCmluZGV4IGNiNDRhYTIuLjg1OTI4NjMgMTAwNjQ0 Ci0tLSBhL2FyY2gvYXJtL3hlbi9tbS5jCisrKyBiL2FyY2gvYXJtL3hlbi9tbS5jCkBAIC0yMSw2 ICsyMSw4IEBACiAjaW5jbHVkZSA8YXNtL3hlbi9oeXBlcmNhbGwuaD4KICNpbmNsdWRlIDxhc20v eGVuL2ludGVyZmFjZS5oPgogCitpbnQgeGVuX3N3aW90bGIgX19yZWFkX21vc3RseTsKKwogdW5z aWduZWQgbG9uZyB4ZW5fZ2V0X3N3aW90bGJfZnJlZV9wYWdlcyh1bnNpZ25lZCBpbnQgb3JkZXIp CiB7CiAJc3RydWN0IG1lbWJsb2NrX3JlZ2lvbiAqcmVnOwpAQCAtMTg5LDYgKzE5MSw3IEBAIGlu dCBfX2luaXQgeGVuX21tX2luaXQodm9pZCkKIAlzdHJ1Y3QgZ250dGFiX2NhY2hlX2ZsdXNoIGNm bHVzaDsKIAlpZiAoIXhlbl9pbml0aWFsX2RvbWFpbigpKQogCQlyZXR1cm4gMDsKKwl4ZW5fc3dp b3RsYiA9IDE7CiAJeGVuX3N3aW90bGJfaW5pdCgxLCBmYWxzZSk7CiAJeGVuX2RtYV9vcHMgPSAm eGVuX3N3aW90bGJfZG1hX29wczsKIApkaWZmIC0tZ2l0IGEvYXJjaC9hcm02NC9pbmNsdWRlL2Fz bS94ZW4vc3dpb3RsYi14ZW4uaCBiL2FyY2gvYXJtNjQvaW5jbHVkZS9hc20veGVuL3N3aW90bGIt eGVuLmgKbmV3IGZpbGUgbW9kZSAxMDA2NDQKaW5kZXggMDAwMDAwMC4uNDU1YWRlNQotLS0gL2Rl di9udWxsCisrKyBiL2FyY2gvYXJtNjQvaW5jbHVkZS9hc20veGVuL3N3aW90bGIteGVuLmgKQEAg LTAsMCArMSBAQAorI2luY2x1ZGUgPHhlbi9hcm0vc3dpb3RsYi14ZW4uaD4KZGlmZiAtLWdpdCBh L2RyaXZlcnMvdmlydGlvL3ZpcnRpb19yaW5nLmMgYi9kcml2ZXJzL3ZpcnRpby92aXJ0aW9fcmlu Zy5jCmluZGV4IGNkN2U3NTUuLmJmOGJhZGMgMTAwNjQ0Ci0tLSBhL2RyaXZlcnMvdmlydGlvL3Zp cnRpb19yaW5nLmMKKysrIGIvZHJpdmVycy92aXJ0aW8vdmlydGlvX3JpbmcuYwpAQCAtMjYwLDcg KzI2MCw3IEBAIHN0YXRpYyBib29sIHZyaW5nX3VzZV9kbWFfYXBpKHN0cnVjdCB2aXJ0aW9fZGV2 aWNlICp2ZGV2KQogCSAqIHRoZSBETUEgQVBJIGlmIHdlJ3JlIGEgWGVuIGd1ZXN0LCB3aGljaCBh dCBsZWFzdCBhbGxvd3MKIAkgKiBhbGwgb2YgdGhlIHNlbnNpYmxlIFhlbiBjb25maWd1cmF0aW9u cyB0byB3b3JrIGNvcnJlY3RseS4KIAkgKi8KLQlpZiAoeGVuX2RvbWFpbigpKQorCWlmICh4ZW5f dnJpbmdfdXNlX2RtYSgpKQogCQlyZXR1cm4gdHJ1ZTsKIAogCXJldHVybiBmYWxzZTsKZGlmZiAt LWdpdCBhL2luY2x1ZGUveGVuL2FybS9zd2lvdGxiLXhlbi5oIGIvaW5jbHVkZS94ZW4vYXJtL3N3 aW90bGIteGVuLmgKbmV3IGZpbGUgbW9kZSAxMDA2NDQKaW5kZXggMDAwMDAwMC4uMmFhYzdjNAot LS0gL2Rldi9udWxsCisrKyBiL2luY2x1ZGUveGVuL2FybS9zd2lvdGxiLXhlbi5oCkBAIC0wLDAg KzEsMTAgQEAKKyNpZm5kZWYgX0FTTV9BUk1fWEVOX1NXSU9UTEJfWEVOX0gKKyNkZWZpbmUgX0FT TV9BUk1fWEVOX1NXSU9UTEJfWEVOX0gKKworI2lmZGVmIENPTkZJR19TV0lPVExCX1hFTgorZXh0 ZXJuIGludCB4ZW5fc3dpb3RsYjsKKyNlbHNlCisjZGVmaW5lIHhlbl9zd2lvdGxiICgwKQorI2Vu ZGlmCisKKyNlbmRpZgpkaWZmIC0tZ2l0IGEvaW5jbHVkZS94ZW4veGVuLmggYi9pbmNsdWRlL3hl bi94ZW4uaAppbmRleCAwZTIxNTY3Li43NGE1MzZkIDEwMDY0NAotLS0gYS9pbmNsdWRlL3hlbi94 ZW4uaAorKysgYi9pbmNsdWRlL3hlbi94ZW4uaApAQCAtNDYsNCArNDYsMTAgQEAgZW51bSB4ZW5f ZG9tYWluX3R5cGUgewogYm9vbCB4ZW5fYmlvdmVjX3BoeXNfbWVyZ2VhYmxlKGNvbnN0IHN0cnVj dCBiaW9fdmVjICp2ZWMxLAogCQljb25zdCBzdHJ1Y3QgYmlvX3ZlYyAqdmVjMik7CiAKKyNpbmNs dWRlIDxhc20veGVuL3N3aW90bGIteGVuLmg+CitzdGF0aWMgaW5saW5lIGludCB4ZW5fdnJpbmdf dXNlX2RtYSh2b2lkKQoreworCXJldHVybiAhIXhlbl9zd2lvdGxiOworfQorCiAjZW5kaWYJLyog X1hFTl9YRU5fSCAqLwoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX18KWGVuLWRldmVsIG1haWxpbmcgbGlzdApYZW4tZGV2ZWxAbGlzdHMueGVucHJvamVjdC5v cmcKaHR0cHM6Ly9saXN0cy54ZW5wcm9qZWN0Lm9yZy9tYWlsbWFuL2xpc3RpbmZvL3hlbi1kZXZl bA==