From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefano Stabellini Subject: Re: [PATCH 8/9] xen/arm: traps: Avoid unnecessary VA -> IPA translation in abort handlers Date: Thu, 14 Jul 2016 16:27:35 +0100 (BST) Message-ID: References: <1466601669-25398-1-git-send-email-julien.grall@arm.com> <1466601669-25398-9-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: <1466601669-25398-9-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: andre.przywara@arm.com, sstabellini@kernel.org, steve.capper@arm.com, wei.chen@linaro.org, xen-devel@lists.xen.org List-Id: xen-devel@lists.xenproject.org T24gV2VkLCAyMiBKdW4gMjAxNiwgSnVsaWVuIEdyYWxsIHdyb3RlOgo+IFRyYW5zbGF0aW5nIGEg VkEgdG8gYSBJUEEgaXMgZXhwZW5zaXZlLiBDdXJyZW50bHksIFhlbiBpcyBhc3N1bWluZyB0aGF0 Cj4gSFBGQVJfRUwyIGlzIG9ubHkgdmFsaWQgd2hlbiB0aGUgc3RhZ2UtMiBkYXRhL2luc3RydWN0 aW9uIGFib3J0IGhhcHBlbmVkCj4gZHVyaW5nIGEgdHJhbnNsYXRpb24gdGFibGUgd2FsayBvZiBh IGZpcnN0IHN0YWdlIHRyYW5zbGF0aW9uIChpLmUgUzFQVFcKPiBpcyBzZXQpLgo+IAo+IEhvd2V2 ZXIsIGJhc2VkIG9uIHRoZSBBUk0gQVJNIChENy4yLjM0IGluIERESSAwNDg3QS5qKSwgdGhlIHJl Z2lzdGVyIGlzCj4gYWxzbyB2YWxpZCB3aGVuIHRoZSBkYXRhL2luc3RydWN0aW9uIGFib3J0IG9j Y3VyZWQgZm9yIGEgdHJhbnNsYXRpb24KPiBmYXVsdC4KPiAKPiBXaXRoIHRoaXMgY2hhbmdlLCB0 aGUgVkEgLT4gSVBBIHRyYW5zbGF0aW9uIHdpbGwgb25seSBoYXBwZW4gZm9yCj4gcGVybWlzc2lv biBmYXVsdHMgdGhhdCBhcmUgbm90IHJlbGF0ZWQgdG8gYSB0cmFuc2xhdGlvbiB0YWJsZSBvZiBh Cj4gZmlyc3Qgc3RhZ2UgdHJhbnNsYXRpb24uCj4gCj4gU2lnbmVkLW9mZi1ieTogSnVsaWVuIEdy YWxsIDxqdWxpZW4uZ3JhbGxAYXJtLmNvbT4KPgo+ICB4ZW4vYXJjaC9hcm0vdHJhcHMuYyB8IDIy ICsrKysrKysrKysrKysrKysrKystLS0KPiAgMSBmaWxlIGNoYW5nZWQsIDE5IGluc2VydGlvbnMo KyksIDMgZGVsZXRpb25zKC0pCj4gCj4gZGlmZiAtLWdpdCBhL3hlbi9hcmNoL2FybS90cmFwcy5j IGIveGVuL2FyY2gvYXJtL3RyYXBzLmMKPiBpbmRleCA1OTFkZTNjLi4wZWRjMmNjIDEwMDY0NAo+ IC0tLSBhL3hlbi9hcmNoL2FybS90cmFwcy5jCj4gKysrIGIveGVuL2FyY2gvYXJtL3RyYXBzLmMK PiBAQCAtMjM4MywxMyArMjM4MywyOCBAQCBzdGF0aWMgaW5saW5lIHBhZGRyX3QgZ2V0X2ZhdWx0 aW5nX2lwYSh2YWRkcl90IGd2YSkKPiAgICAgIHJldHVybiBpcGE7Cj4gIH0KPiAgCj4gK3N0YXRp YyBpbmxpbmUgYm9vbCBocGZhcl9pc192YWxpZChib29sIHMxcHR3LCB1aW50OF90IGZzYykKPiAr ewo+ICsgICAgLyoKPiArICAgICAqIEhQRkFSIGlzIHZhbGlkIGlmIG9uZSBvZiB0aGUgZm9sbG93 aW5nIGNhc2VzIGFyZSB0cnVlOgo+ICsgICAgICogIDEuIHRoZSBzdGFnZSAyIGZhdWx0IGhhcHBl biBkdXJpbmcgYSBzdGFnZSAxIHBhZ2UgdGFibGUgd2Fsawo+ICsgICAgICogICh0aGUgYml0IEVT Ul9FTDIuUzFQVFcgaXMgc2V0KQo+ICsgICAgICogIDIuIHRoZSBmYXVsdCB3YXMgZHVlIHRvIGEg dHJhbnNsYXRpb24gZmF1bHQKPiArICAgICAqCj4gKyAgICAgKiBOb3RlIHRoYXQgdGVjaG5pY2Fs bHkgSFBGQVIgaXMgdmFsaWQgZm9yIG90aGVyIGNhc2VzLCBidXQgdGhleQo+ICsgICAgICogYXJl IGN1cnJlbnRseSBub3Qgc3VwcG9ydGVkIGJ5IFhlbi4KPiArICAgICAqLwo+ICsgICAgcmV0dXJu IHMxcHR3IHx8IChmc2MgPT0gRlNDX0ZMVF9UUkFOUyk7Cj4gK30KPiArCj4gIHN0YXRpYyB2b2lk IGRvX3RyYXBfaW5zdHJfYWJvcnRfZ3Vlc3Qoc3RydWN0IGNwdV91c2VyX3JlZ3MgKnJlZ3MsCj4g ICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgICAgY29uc3QgdW5pb24gaHNyIGhz cikKPiAgewo+ICAgICAgaW50IHJjOwo+ICAgICAgcmVnaXN0ZXJfdCBndmEgPSBSRUFEX1NZU1JF RyhGQVJfRUwyKTsKPiArICAgIHVpbnQ4X3QgZnNjID0gaHNyLmlhYnQuaWZzYyAmIH5GU0NfTExf TUFTSzsKPiAgCj4gLSAgICBzd2l0Y2ggKCBoc3IuaWFidC5pZnNjICYgfkZTQ19MTF9NQVNLICkK PiArICAgIHN3aXRjaCAoIGZzYyApCj4gICAgICB7Cj4gICAgICBjYXNlIEZTQ19GTFRfUEVSTToK PiAgICAgIHsKPiBAQCAtMjQwMCw3ICsyNDE1LDcgQEAgc3RhdGljIHZvaWQgZG9fdHJhcF9pbnN0 cl9hYm9ydF9ndWVzdChzdHJ1Y3QgY3B1X3VzZXJfcmVncyAqcmVncywKPiAgICAgICAgICAgICAg LmtpbmQgPSBoc3IuaWFidC5zMXB0dyA/IG5wZmVjX2tpbmRfaW5fZ3B0IDogbnBmZWNfa2luZF93 aXRoX2dsYQo+ICAgICAgICAgIH07Cj4gIAo+IC0gICAgICAgIGlmICggaHNyLmlhYnQuczFwdHcg KQo+ICsgICAgICAgIGlmICggaHBmYXJfaXNfdmFsaWQoaHNyLmlhYnQuczFwdHcsIGZzYykgKQo+ ICAgICAgICAgICAgICBncGEgPSBnZXRfZmF1bHRpbmdfaXBhKGd2YSk7Cj4gICAgICAgICAgZWxz ZQo+ICAgICAgICAgIHsKPiBAQCAtMjQzNSw2ICsyNDUwLDcgQEAgc3RhdGljIHZvaWQgZG9fdHJh cF9kYXRhX2Fib3J0X2d1ZXN0KHN0cnVjdCBjcHVfdXNlcl9yZWdzICpyZWdzLAo+ICAgICAgY29u c3Qgc3RydWN0IGhzcl9kYWJ0IGRhYnQgPSBoc3IuZGFidDsKPiAgICAgIGludCByYzsKPiAgICAg IG1taW9faW5mb190IGluZm87Cj4gKyAgICB1aW50OF90IGZzYyA9IGhzci5kYWJ0LmRmc2MgJiB+ RlNDX0xMX01BU0s7CgpZb3Ugc2hvdWxkIGJlIGFibGUgdG8gbW9kaWZ5IHRoZSBzd2l0Y2ggaW4g dGhpcyBjYXNlIHRvbywgcmlnaHQ/CgoKPiAgICAgIGluZm8uZGFidCA9IGRhYnQ7Cj4gICNpZmRl ZiBDT05GSUdfQVJNXzMyCj4gQEAgLTI0NDMsNyArMjQ1OSw3IEBAIHN0YXRpYyB2b2lkIGRvX3Ry YXBfZGF0YV9hYm9ydF9ndWVzdChzdHJ1Y3QgY3B1X3VzZXJfcmVncyAqcmVncywKPiAgICAgIGlu Zm8uZ3ZhID0gUkVBRF9TWVNSRUc2NChGQVJfRUwyKTsKPiAgI2VuZGlmCj4gIAo+IC0gICAgaWYg KCBkYWJ0LnMxcHR3ICkKPiArICAgIGlmICggaHBmYXJfaXNfdmFsaWQoaHNyLmlhYnQuczFwdHcs IGZzYykgKQo+ICAgICAgICAgIGluZm8uZ3BhID0gZ2V0X2ZhdWx0aW5nX2lwYShpbmZvLmd2YSk7 Cj4gICAgICBlbHNlCj4gICAgICB7Cj4gLS0gCj4gMS45LjEKPiAKCl9fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fClhlbi1kZXZlbCBtYWlsaW5nIGxpc3QKWGVu LWRldmVsQGxpc3RzLnhlbi5vcmcKaHR0cHM6Ly9saXN0cy54ZW4ub3JnL3hlbi1kZXZlbAo=