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Mon, 19 Jul 2021 09:00:55 -0700 (PDT) Received: from [192.168.0.110] (unknown [172.31.20.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id B39FE3F73D; Mon, 19 Jul 2021 09:00:53 -0700 (PDT) Subject: Re: [PATCH v2 1/4] KVM: arm64: Narrow PMU sysreg reset values to architectural requirements To: Marc Zyngier References: <20210719123902.1493805-1-maz@kernel.org> <20210719123902.1493805-2-maz@kernel.org> <171cca9d-2a6e-248c-8502-feba8ebbe55e@arm.com> <171834f3198b898d5c2aefa0270b65f2@kernel.org> From: Alexandru Elisei Message-ID: <482a40a8-d190-99d3-ec17-59ee730be0fa@arm.com> Date: Mon, 19 Jul 2021 17:02:01 +0100 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.12.0 MIME-Version: 1.0 In-Reply-To: <171834f3198b898d5c2aefa0270b65f2@kernel.org> Content-Language: en-US Cc: kvm@vger.kernel.org, kernel-team@android.com, Russell King , Russell King , Robin Murphy , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu SGkgTWFyYywKCk9uIDcvMTkvMjEgNDo1NiBQTSwgTWFyYyBaeW5naWVyIHdyb3RlOgo+IE9uIDIw MjEtMDctMTkgMTY6NTUsIEFsZXhhbmRydSBFbGlzZWkgd3JvdGU6Cj4+IEhpIE1hcmMsCj4+Cj4+ IE9uIDcvMTkvMjEgMTozOCBQTSwgTWFyYyBaeW5naWVyIHdyb3RlOgo+Pj4gQSBudW1iZXIgb2Yg dGhlIFBNVSBzeXNyZWdzIGV4cG9zZSByZXNldCB2YWx1ZXMgdGhhdCBhcmUgbm90Cj4+PiBjb21w bGlhbnQgd2l0aCB0aGUgYXJjaGl0ZWN0dXJlIChzZXQgYml0cyBpbiB0aGUgUkVTMCByYW5nZXMs Cj4+PiBmb3IgZXhhbXBsZSkuCj4+Pgo+Pj4gVGhpcyBpbiB0dXJuIGhhcyB0aGUgZWZmZWN0IHRo YXQgd2UgbmVlZCB0byBwb2ludGxlc3NseSBtYXNrCj4+PiBzb21lIHJlZ2lzdGVyIGZpZWxkcyB3 aGVuIHVzaW5nIHRoZW0uCj4+Pgo+Pj4gTGV0J3Mgc3RhcnQgYnkgbWFraW5nIHN1cmUgd2UgZG9u J3QgaGF2ZSBpbGxlZ2FsIHZhbHVlcyBpbiB0aGUKPj4+IHNoYWRvdyByZWdpc3RlcnMgYXQgcmVz ZXQgdGltZS4gVGhpcyBhZmZlY3RzIGFsbCB0aGUgcmVnaXN0ZXJzCj4+PiB0aGF0IGRlZGljYXRl IG9uZSBiaXQgcGVyIGNvdW50ZXIsIHRoZSBjb3VudGVycyB0aGVtc2VsdmVzLAo+Pj4gUE1FVlRZ UEVSbl9FTDAgYW5kIFBNU0VMUl9FTDAuCj4+Pgo+Pj4gUmVwb3J0ZWQtYnk6IEFsZXhhbmRyZSBD aGFydHJlIDxhbGV4YW5kcmUuY2hhcnRyZUBvcmFjbGUuY29tPgo+Pj4gUmV2aWV3ZWQtYnk6IEFs ZXhhbmRyZSBDaGFydHJlIDxhbGV4YW5kcmUuY2hhcnRyZUBvcmFjbGUuY29tPgo+Pj4gQWNrZWQt Ynk6IFJ1c3NlbGwgS2luZyAoT3JhY2xlKSA8cm1rK2tlcm5lbEBhcm1saW51eC5vcmcudWs+Cj4+ PiBTaWduZWQtb2ZmLWJ5OiBNYXJjIFp5bmdpZXIgPG1hekBrZXJuZWwub3JnPgo+Pj4gLS0tCj4+ PiDCoGFyY2gvYXJtNjQva3ZtL3N5c19yZWdzLmMgfCA0MyArKysrKysrKysrKysrKysrKysrKysr KysrKysrKysrKysrKystLS0KPj4+IMKgMSBmaWxlIGNoYW5nZWQsIDQwIGluc2VydGlvbnMoKyks IDMgZGVsZXRpb25zKC0pCj4+Pgo+Pj4gZGlmZiAtLWdpdCBhL2FyY2gvYXJtNjQva3ZtL3N5c19y ZWdzLmMgYi9hcmNoL2FybTY0L2t2bS9zeXNfcmVncy5jCj4+PiBpbmRleCBmNmYxMjZlYjZhYzEu Ljk2YmRmYTBlNjhiMiAxMDA2NDQKPj4+IC0tLSBhL2FyY2gvYXJtNjQva3ZtL3N5c19yZWdzLmMK Pj4+ICsrKyBiL2FyY2gvYXJtNjQva3ZtL3N5c19yZWdzLmMKPj4+IEBAIC02MDMsNiArNjAzLDQx IEBAIHN0YXRpYyB1bnNpZ25lZCBpbnQgcG11X3Zpc2liaWxpdHkoY29uc3Qgc3RydWN0IGt2bV92 Y3B1Cj4+PiAqdmNwdSwKPj4+IMKgwqDCoMKgIHJldHVybiBSRUdfSElEREVOOwo+Pj4gwqB9Cj4+ Pgo+Pj4gK3N0YXRpYyB2b2lkIHJlc2V0X3BtdV9yZWcoc3RydWN0IGt2bV92Y3B1ICp2Y3B1LCBj b25zdCBzdHJ1Y3Qgc3lzX3JlZ19kZXNjICpyKQo+Pj4gK3sKPj4+ICvCoMKgwqAgdTY0IG4sIG1h c2sgPSBCSVQoQVJNVjhfUE1VX0NZQ0xFX0lEWCk7Cj4+PiArCj4+PiArwqDCoMKgIC8qIE5vIFBN VSBhdmFpbGFibGUsIGFueSBQTVUgcmVnIG1heSBVTkRFRi4uLiAqLwo+Pj4gK8KgwqDCoCBpZiAo IWt2bV9hcm1fc3VwcG9ydF9wbXVfdjMoKSkKPj4+ICvCoMKgwqDCoMKgwqDCoCByZXR1cm47Cj4+ PiArCj4+PiArwqDCoMKgIG4gPSByZWFkX3N5c3JlZyhwbWNyX2VsMCkgPj4gQVJNVjhfUE1VX1BN Q1JfTl9TSElGVDsKPj4+ICvCoMKgwqAgbiAmPSBBUk1WOF9QTVVfUE1DUl9OX01BU0s7Cj4+PiAr wqDCoMKgIGlmIChuKQo+Pj4gK8KgwqDCoMKgwqDCoMKgIG1hc2sgfD0gR0VOTUFTSyhuIC0gMSwg MCk7Cj4+Cj4+IEhtLi4uIHNlZW1zIHRvIGJlIG1pc3NpbmcgdGhlIGN5Y2xlIGNvdW50ZXIuCj4K PiBDaGVjayB0aGUgZGVjbGFyYXRpb24gZm9yICdtYXNrJy4uLiA6LSkKClllYWgsIHNvcnJ5IGZv ciB0aGF0LCBJIHN0aWxsIGhhZCBpbiBteSBtaW5kIHRoZSBvcmlnaW5hbCBmdW5jdGlvbiBib2R5 LgoKRXZlcnl0aGluZyBsb29rcyBhbHJpZ2h0IHRvIG1lLCBubyBjaGFuZ2VzIGZyb20gdGhlIHBy ZXZpb3VzIHZlcnNpb24gKFBNU1dJTkNfRUwxCmlzIGhhbmRsZWQgaW4gdGhlIGxhc3QgcGF0Y2gp IHdoZXJlIEkgaGFkIGNoZWNrZWQgdGhhdCB0aGUgcmVzZXQgdmFsdWVzIG1hdGNoIHRoZQphcmNo aXRlY3R1cmU6CgpSZXZpZXdlZC1ieTogQWxleGFuZHJ1IEVsaXNlaSA8YWxleGFuZHJ1LmVsaXNl aUBhcm0uY29tPgoKVGhhbmtzLAoKQWxleAoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX18Ka3ZtYXJtIG1haWxpbmcgbGlzdAprdm1hcm1AbGlzdHMuY3MuY29s dW1iaWEuZWR1Cmh0dHBzOi8vbGlzdHMuY3MuY29sdW1iaWEuZWR1L21haWxtYW4vbGlzdGluZm8v a3ZtYXJtCg==