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[85.223.209.22]) by smtp.gmail.com with ESMTPSA id t1sm14479202lji.52.2019.08.01.00.33.06 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 01 Aug 2019 00:33:07 -0700 (PDT) To: Julien Grall , xen-devel@lists.xenproject.org References: <1564137460-25629-1-git-send-email-andrii.anisov@gmail.com> <1564137460-25629-7-git-send-email-andrii.anisov@gmail.com> <63256c34-fab7-1fb8-3637-9c5a50d6d6bf@gmail.com> <8c7bc6d1-3482-ec5b-b3d9-c6562caf5711@arm.com> From: Andrii Anisov Message-ID: Date: Thu, 1 Aug 2019 10:33:01 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.8.0 MIME-Version: 1.0 In-Reply-To: <8c7bc6d1-3482-ec5b-b3d9-c6562caf5711@arm.com> Content-Language: en-US Subject: Re: [Xen-devel] [RFC 5/6] arm64: call enter_hypervisor_head only when it is needed X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Volodymyr Babchuk , Stefano Stabellini , Andrii Anisov , Andre Przywara Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" CgpPbiAzMS4wNy4xOSAxNDowMiwgSnVsaWVuIEdyYWxsIHdyb3RlOgo+IEV2ZXJ5dGhpbmcgaXMg aW4gdGhlIGhvdCBwYXRoIGhlcmUsIHlldCB0aGVyZSBhcmUgYSBsb3Qgb2Ygb3RoZXIgYnJhbmNo ZXMuIFNvIHdoeSB0aGlzIGJyYW5jaCBpbiBwYXJ0aWN1bGFyPwoKVGhpcyBicmFuY2ggYW5kIGZ1 bmN0aW9uIGNhbGwgaXMgcGFydGljdWxhciBiZWNhdXNlIEkgZmluZCB0aGlzIHBpZWNlIG9mIGNv ZGUgcXVpdGUgY29uZnVzaW5nOgoKPj4gSSdtIG5vdCBzZWVpbmcgYW55IGJlbmVmaXRzIGluIGNh bGxpbmcgYGVudGVyX2h5cGVydmlzb3JfaGVhZCgpYCBmcm9tIGZ1bmN0aW9ucyBuYW1lZCBgZG9f dHJhcF9oeXBfKmAuIFRoYXQgY29kZSBpcyBjb25mdXNpbmcgZm9yIG1lLgo+PiBJTUhPLCBkaXZp ZGluZyBgZG9fdHJhcF9pcnEvZmlxKClgIGludG8gZ3Vlc3QgYW5kIGh5cCBzcGVjaWZpYyBmdW5j dGlvbnMgaXMgbm90IGEgYmlnIGRlYWwuIEV2ZW4gZm9yIEFSTTMyLiBNb3Jlb3ZlciwgaXQgd2ls bCBtYWtlIG1vcmUgb2J2aW91cyB0aGUgZmFjdCB0aGF0IG5vdGhpbmcgZnJvbSBgZW50ZXJfaHlw ZXJ2aXNvcl9oZWFkKClgIGlzIGRvbmUgZm9yIElSUSB0cmFwcyB0YWtlbiBmcm9tIGh5cC4KCkFu ZCBJIGJlbGlldmUgdGhpcyBwYXRjaCBiYWxhbmNlcyBwYXRjaCAieGVuL2FybTogUmUtZW5hYmxl IGludGVycnVwdCBsYXRlciBpbiB0aGUgdHJhcCBwYXRoIiB3aGF0IHlvdSBOQUtlZCBiZWNhdXNl IG9mIGluY3JlYXNlZCBJUlEgbGF0ZW5jeS4KV2hpbGUgdGhlbSB0b2dldGhlciBtYWtlIHRoZSBj b2RlIG1vcmUgc3RyYWlnaHQgZm9yd2FyZCBhbmQgY2xlYXIsIGJlY2F1c2U6CiAgLSB5b3Ugc3Rh cnQgYWxsIEMtY29kZWQgY29tbW9uIHRyYXAgaGFuZGxlcnMgd2l0aCBJUlFzIGxvY2tlZCwgYW5k IGZyZWUgZnJvbSBhc20gY29kZSBtaXN1bmRlcnN0YW5kaW5nCiAgLSBhbGwgY29tbW9uIHRyYXAg aGFuZGxlcnMgYXJlIGRpc3RpbmN0IGluIHRoZWlyIG5hbWluZywgcHVycG9zZSBhbmQgYWN0aW9u LiBJbiB0ZXJtcyBvZiBjYWxsaW5nIGBlbnRlcl9oeXBlcnZpc29yX2hlYWQoKWAgb25seSBmcm9t IHRoZSB0cmFwcyB0YWtlbiBmcm9tIGd1ZXN0LgoKPiBJZiB5b3UgYXJlIHJlYWxseSB3b3JyeSBv ZiB0aGUgaW1wYWN0IG9mIGJyYW5jaCB0aGVuIHRoZXJlIGFyZSBhIGZldyBtb3JlIGltcG9ydGFu dCBwbGFjZXMgKHdpdGggYSBncmVhdGVyIGJlbmVmaXRzKSB0byBsb29rOgo+ICDCoMKgwqAgMSkg SXQgc2VlbXMgdGhlIGNvbXBpbGVyIHVzZSBhIGp1bXAgdGFibGUgZm9yIHRoZSBzd2l0Y2ggY2Fz ZSBpbiBkb190cmFwX2d1ZXN0X3N5bmMoKSwgc28gaXQgd2lsbCByZXN1bHQgdG8gbXVsdGlwbGUg ZGlyZWN0IGJyYW5jaCBldmVyeXRpbWUuCj4gIMKgwqDCoCAyKSBJbmRpcmVjdCBicmFuY2ggaGF2 ZSBhIG5vbi1uZWdsaWdpYmxlIGNvc3QgY29tcGFyZSB0byBkaXJlY3QgYnJhbmNoLiBUaGlzIGlz IGEgbG90IHVzZWQgaW4gdGhlIGludGVycnVwdCBjb2RlIChzZWUgZ2ljX2h3X29wcy0+cmVhZF9p cnEoKSkuIEFsbCBvZiB0aGVtIGFyZSBrbm93biBhdCBib290IHRpbWUsIHNvIHRoZXkgY291bGQg YmUgcmVwbGFjZSB3aXRoIGRpcmVjdCBicmFuY2guIHg4NiByZWNlbnRseSBpbnRyb2R1Y2VkIGFs dGVybmF0aXZlX2NhbGwoKSBmb3IgdGhpcyBwdXJwb3NlLiBUaGlzIGNvdWxkIGJlIHJlLXVzZWQg b24gQXJtLgoKSSByZW1lbWJlciB0aGlzLiBCdXQgSSdtIG5vdCByZWFkeSB0byBjb2RlIGl0LiBJ IGFkbWl0IHRoYXQgSSBoYXZlIG5vdCB5ZXQgZ29vZCB1bmRlcnN0YW5kaW5nIGFib3V0IGhvdyBh bHRlcm5hdGl2ZXMgd29yay4KCi0tIApTaW5jZXJlbHksCkFuZHJpaSBBbmlzb3YuCgpfX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fXwpYZW4tZGV2ZWwgbWFpbGlu ZyBsaXN0Clhlbi1kZXZlbEBsaXN0cy54ZW5wcm9qZWN0Lm9yZwpodHRwczovL2xpc3RzLnhlbnBy b2plY3Qub3JnL21haWxtYW4vbGlzdGluZm8veGVuLWRldmVs