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([2001:b07:add:ec09:c399:bc87:7b6c:fb2a]) by smtp.googlemail.com with ESMTPSA id m36sm3269698wms.25.2021.11.30.08.07.38 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 30 Nov 2021 08:07:47 -0800 (PST) Message-ID: <3f5adff7-f321-0688-c817-84975ebd3d14@redhat.com> Date: Tue, 30 Nov 2021 17:07:36 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.2.0 Subject: Re: [PATCH v2 10/43] KVM: arm64: Move vGIC v4 handling for WFI out arch callback hook Content-Language: en-US To: Marc Zyngier Cc: Sean Christopherson , Huacai Chen , Aleksandar Markovic , Paul Mackerras , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Christian Borntraeger , Janosch Frank , James Morse , Alexandru Elisei , Suzuki K Poulose , Atish Patra , David Hildenbrand , Cornelia Huck , Claudio Imbrenda , Vitaly Kuznetsov , Wanpeng Li , Jim Mattson , Joerg Roedel , linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, linux-mips@vger.kernel.org, kvm@vger.kernel.org, kvm-ppc@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, David Matlack , Oliver Upton , Jing Zhang References: <20211009021236.4122790-1-seanjc@google.com> <20211009021236.4122790-11-seanjc@google.com> <9236e715-c471-e1c8-6117-6f37b908a6bd@redhat.com> <875ytjbxpq.wl-maz@kernel.org> <3490c50e-50d2-f906-3383-b87e14b14fab@redhat.com> <4826a7e2dbecc5d57323d18d725d6d69@kernel.org> From: Paolo Bonzini In-Reply-To: <4826a7e2dbecc5d57323d18d725d6d69@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211130_080749_958275_22422098 X-CRM114-Status: GOOD ( 18.80 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Transfer-Encoding: base64 Content-Type: text/plain; charset="utf-8"; Format="flowed" Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org T24gMTEvMzAvMjEgMTM6MDQsIE1hcmMgWnluZ2llciB3cm90ZToKPj4+Cj4+PiBJIGhhdmUgInF1 ZXVlZCIgaXQsIGJ1dCB0aGF0J3MganVzdCBteSBxdWV1ZSAtIGl0J3Mgbm90IG9uIGtlcm5lbC5v cmcgCj4+PiBhbmQgaXQncyBub3QgZ29pbmcgdG8gYmUgaW4gNS4xNiwgYXQgbGVhc3Qgbm90IGlu IHRoZSBmaXJzdCBiYXRjaC4KPj4+Cj4+PiBUaGVyZSdzIHBsZW50eSBvZiB0aW1lIGZvciBtZSB0 byByZWJhc2Ugb24gdG9wIG9mIGEgZml4LCBpZiB5b3Ugd2FudCAKPj4+IHRvIHNlbmQgdGhlIGZp eCB0aHJvdWdoIHlvdXIga3ZtLWFybSBwdWxsIHJlcXVlc3QuwqAgSnVzdCBDYyBtZSBzbyAKPj4+ IHRoYXQgSSB1bmRlcnN0YW5kIHdoYXQncyBnb2luZyBvbi4KPj4KPj4gU2luY2UgYSBtb250aCBo YXMgcGFzc2VkIGFuZCBJIGRpZG4ndCBzZWUgYW55dGhpbmcgcmVsYXRlZCBpbiB0aGUKPj4gS1ZN LUFSTSBwdWxsIHJlcXVlc3RzLCBJIGFtIGdvaW5nIHRvIHF1ZXVlIHRoaXMgcGF0Y2guwqAgQW55 IGNvbmZsaWN0cwo+PiBjYW4gYmUgcmVzb2x2ZWQgdGhyb3VnaCBhIGt2bWFybS0+a3ZtIG1lcmdl IG9mIGVpdGhlciBhIHRvcGljIGJyYW5jaAo+PiBvciBhIHRhZyB0aGF0IGlzIGRlc3RpbmVkIHRv IDUuMTYuCj4gCj4gQ2FuIHlvdSBhdCBsZWFzdCBzcGVsbCBvdXQgKndoZW4qIHRoaXMgd2lsbCBs YW5kPwoKSXQgd2lsbCBiZSBpbiBrdm0vbmV4dCBhcyBzb29uIGFzIEkgZmluaXNoIHJ1bm5pbmcg dGVzdHMgb24gaXQsIHdoaWNoIAptYXkgdGFrZSBhIGNvdXBsZSBtb3JlIGRheXMgYmVjYXVzZSBJ J20gdXBkYXRpbmcgbXkgbWFjaGluZXMgdG8gbmV3ZXIgCm9wZXJhdGluZyBzeXN0ZW1zLgoKPiBU aGVyZSBpcywgaW4gZ2VuZXJhbCwgYSBjZXJ0YWluIGxhY2sgb2YgY2xhcml0eSBhYm91dCB3aGF0 IHlvdSBhcmUgcXVldWluZywKPiB3aGVyZSB5b3UgYXJlIHF1ZXVpbmcgaXQsIGFuZCB3aGF0IHJl bGVhc2UgaXQgdGFyZ2V0cy4KCk9rLCB0aGFua3MgZm9yIHRoZSBzdWdnZXN0aW9uLiAgR2VuZXJh bGx5IHNwZWFraW5nOgoKLSBrdm0vbWFzdGVyIGlzIHN0dWZmIHRoYXQgaXMgbWVyZ2VkIGFuZCB3 aWxsIGJlIGluIHRoZSBuZXh0IC1yYywgcmlnaHQgCm5vdyA1LjE2LXJjNC4gIEl0IHNob3VsZG4n dCBldmVyIHJld2luZCAodGhvdWdoIGl0IG1heSBoYXBwZW4sIGl0IGlzIHJhcmUpCgotIGt2bS9u ZXh0IGlzIHN0dWZmIHRoYXQgaXMgbWVyZ2VkIGFuZCB3aWxsIGJlIGluIHRoZSBuZXh0IG1lcmdl IHdpbmRvdywgCnJpZ2h0IG5vdyA1LjE3LiAgSXQgYWxzbyBzaG91bGRuJ3QgcmV3aW5kLgoKLSBr dm0vcXVldWUgaXMgc3R1ZmYgdGhhdCB0aGUgc3VibWl0dGVyIHNob3VsZG4ndCBjYXJlIGFib3V0 LCBhbmQgdGhhdCAKb3RoZXIgcGVvcGxlIHNob3VsZCBvbmx5IGNhcmUgYWJvdXQgdG8gY2hlY2sg Zm9yIGNvbmZsaWN0cy4gIFdoZW4gSSBzYXkgCkkgInF1ZXVlZCIgYSBwYXRjaCBpdCBnb2VzIGlu IGt2bS9xdWV1ZSwgYW5kIHRoZXJlJ3MgdGltZSB0byByZW1vdmUgaXQgCmlmIHNvbWV0aGluZyBi cmVha3MuCgpSZWdhcmRpbmcgdGhpcyBzZXJpZXM6CgotIEkgYW0gcXVldWluZyBpdCB1cCB0byB0 aGlzIHBhdGNoCgotIEkgYW0gcXVldWluZyBpdCB0byBrdm0vbmV4dCwgbWVhbmluZyBpdCB0YXJn ZXRzIDUuMTcKCi0gaXQgbG9va3MgbGlrZSB0aGUgbmV4dCBvbmUgKDExLzQzKSB0cmlnZ2VycyBh IGtub3duIEFNRCBlcnJhdGEsIHNvIEknbSAKaG9sZGluZyBvbiB0aGUgcmVzdCB1bnRpbCB3ZSB1 bmRlcnN0YW5kIGlmIGl0IGFjdHVhbGx5IGRvZXMsIGFuZCBpZiBzbyAKaWYgQU1EIEFWSUMgaXMg ZG9vbWVkLiAgRm9yIHRoZSB0aW1lIGJlaW5nLCBpdCB3aWxsIHN0YXkgaW4ga3ZtL3F1ZXVlLgoK UGFvbG8KCl9fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fX19fCmxp bnV4LWFybS1rZXJuZWwgbWFpbGluZyBsaXN0CmxpbnV4LWFybS1rZXJuZWxAbGlzdHMuaW5mcmFk ZWFkLm9yZwpodHRwOi8vbGlzdHMuaW5mcmFkZWFkLm9yZy9tYWlsbWFuL2xpc3RpbmZvL2xpbnV4 LWFybS1rZXJuZWwK