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Thu, 5 Nov 2020 09:10:28 +0000 (UTC) Received: from kamzik.brq.redhat.com (unknown [10.40.193.18]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8A75F60C17; Thu, 5 Nov 2020 09:10:26 +0000 (UTC) From: Andrew Jones To: kvmarm@lists.cs.columbia.edu Subject: [PATCH v3 1/4] KVM: arm64: Don't hide ID registers from userspace Date: Thu, 5 Nov 2020 10:10:19 +0100 Message-Id: <20201105091022.15373-2-drjones@redhat.com> In-Reply-To: <20201105091022.15373-1-drjones@redhat.com> References: <20201105091022.15373-1-drjones@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 Cc: maz@kernel.org, xu910121@sina.com, Dave.Martin@arm.com, stable@vger.kernel.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 SUQgcmVnaXN0ZXJzIGFyZSBSQVogdW50aWwgdGhleSd2ZSBiZWVuIGFsbG9jYXRlZCBhIHB1cnBv c2UsIGJ1dAp0aGF0IGRvZXNuJ3QgbWVhbiB0aGV5IHNob3VsZCBiZSByZW1vdmVkIGZyb20gdGhl IEtWTV9HRVRfUkVHX0xJU1QKbGlzdC4gU28gZmFyIHdlIG9ubHkgaGF2ZSBvbmUgcmVnaXN0ZXIs IFNZU19JRF9BQTY0WkZSMF9FTDEsIHRoYXQKaXMgaGlkZGVuIGZyb20gdXNlcnNwYWNlIHdoZW4g aXRzIGZ1bmN0aW9uLCBTVkUsIGlzIG5vdCBwcmVzZW50LgoKRXhwb3NlIFNZU19JRF9BQTY0WkZS MF9FTDEgdG8gdXNlcnNwYWNlIGFzIFJBWiB3aGVuIFNWRSBpcyBub3QKaW1wbGVtZW50ZWQuIFJl bW92aW5nIHRoZSB1c2Vyc3BhY2UgdmlzaWJpbGl0eSBjaGVja3MgaXMgZW5vdWdoCnRvIHJlZXhw b3NlIGl0LCBhcyBpdCB3aWxsIGFscmVhZHkgcmV0dXJuIHplcm8gdG8gdXNlcnNwYWNlIHdoZW4K U1ZFIGlzIG5vdCBwcmVzZW50LiBUaGUgcmVnaXN0ZXIgYWxyZWFkeSBiZWhhdmVzIGFzIFJBWiBm b3IgdGhlCmd1ZXN0IHdoZW4gU1ZFIGlzIG5vdCBwcmVzZW50LgoKRml4ZXM6IDczNDMzNzYyZmNh ZSAoIktWTTogYXJtNjQvc3ZlOiBTeXN0ZW0gcmVnaXN0ZXIgY29udGV4dCBzd2l0Y2ggYW5kIGFj Y2VzcyBzdXBwb3J0IikKQ2M6IHN0YWJsZUB2Z2VyLmtlcm5lbC5vcmcjdjUuMisKUmVwb3J0ZWQt Ynk6IOW8oOS4nOaXrSA8eHU5MTAxMjFAc2luYS5jb20+ClNpZ25lZC1vZmYtYnk6IEFuZHJldyBK b25lcyA8ZHJqb25lc0ByZWRoYXQuY29tPgotLS0KIGFyY2gvYXJtNjQva3ZtL3N5c19yZWdzLmMg fCAxOCArLS0tLS0tLS0tLS0tLS0tLS0KIDEgZmlsZSBjaGFuZ2VkLCAxIGluc2VydGlvbigrKSwg MTcgZGVsZXRpb25zKC0pCgpkaWZmIC0tZ2l0IGEvYXJjaC9hcm02NC9rdm0vc3lzX3JlZ3MuYyBi L2FyY2gvYXJtNjQva3ZtL3N5c19yZWdzLmMKaW5kZXggZmIxMmQzZWY0MjNhLi42ZmYwYzE1NTMx Y2EgMTAwNjQ0Ci0tLSBhL2FyY2gvYXJtNjQva3ZtL3N5c19yZWdzLmMKKysrIGIvYXJjaC9hcm02 NC9rdm0vc3lzX3JlZ3MuYwpAQCAtMTE5NSwxNiArMTE5NSw2IEBAIHN0YXRpYyB1bnNpZ25lZCBp bnQgc3ZlX3Zpc2liaWxpdHkoY29uc3Qgc3RydWN0IGt2bV92Y3B1ICp2Y3B1LAogCXJldHVybiBS RUdfSElEREVOX1VTRVIgfCBSRUdfSElEREVOX0dVRVNUOwogfQogCi0vKiBWaXNpYmlsaXR5IG92 ZXJyaWRlcyBmb3IgU1ZFLXNwZWNpZmljIElEIHJlZ2lzdGVycyAqLwotc3RhdGljIHVuc2lnbmVk IGludCBzdmVfaWRfdmlzaWJpbGl0eShjb25zdCBzdHJ1Y3Qga3ZtX3ZjcHUgKnZjcHUsCi0JCQkJ ICAgICAgY29uc3Qgc3RydWN0IHN5c19yZWdfZGVzYyAqcmQpCi17Ci0JaWYgKHZjcHVfaGFzX3N2 ZSh2Y3B1KSkKLQkJcmV0dXJuIDA7Ci0KLQlyZXR1cm4gUkVHX0hJRERFTl9VU0VSOwotfQotCiAv KiBHZW5lcmF0ZSB0aGUgZW11bGF0ZWQgSURfQUE2NFpGUjBfRUwxIHZhbHVlIGV4cG9zZWQgdG8g dGhlIGd1ZXN0ICovCiBzdGF0aWMgdTY0IGd1ZXN0X2lkX2FhNjR6ZnIwX2VsMShjb25zdCBzdHJ1 Y3Qga3ZtX3ZjcHUgKnZjcHUpCiB7CkBAIC0xMjMxLDkgKzEyMjEsNiBAQCBzdGF0aWMgaW50IGdl dF9pZF9hYTY0emZyMF9lbDEoc3RydWN0IGt2bV92Y3B1ICp2Y3B1LAogewogCXU2NCB2YWw7CiAK LQlpZiAoV0FSTl9PTighdmNwdV9oYXNfc3ZlKHZjcHUpKSkKLQkJcmV0dXJuIC1FTk9FTlQ7Ci0K IAl2YWwgPSBndWVzdF9pZF9hYTY0emZyMF9lbDEodmNwdSk7CiAJcmV0dXJuIHJlZ190b191c2Vy KHVhZGRyLCAmdmFsLCByZWctPmlkKTsKIH0KQEAgLTEyNDYsOSArMTIzMyw2IEBAIHN0YXRpYyBp bnQgc2V0X2lkX2FhNjR6ZnIwX2VsMShzdHJ1Y3Qga3ZtX3ZjcHUgKnZjcHUsCiAJaW50IGVycjsK IAl1NjQgdmFsOwogCi0JaWYgKFdBUk5fT04oIXZjcHVfaGFzX3N2ZSh2Y3B1KSkpCi0JCXJldHVy biAtRU5PRU5UOwotCiAJZXJyID0gcmVnX2Zyb21fdXNlcigmdmFsLCB1YWRkciwgaWQpOwogCWlm IChlcnIpCiAJCXJldHVybiBlcnI7CkBAIC0xNTE4LDcgKzE1MDIsNyBAQCBzdGF0aWMgY29uc3Qg c3RydWN0IHN5c19yZWdfZGVzYyBzeXNfcmVnX2Rlc2NzW10gPSB7CiAJSURfU0FOSVRJU0VEKElE X0FBNjRQRlIxX0VMMSksCiAJSURfVU5BTExPQ0FURUQoNCwyKSwKIAlJRF9VTkFMTE9DQVRFRCg0 LDMpLAotCXsgU1lTX0RFU0MoU1lTX0lEX0FBNjRaRlIwX0VMMSksIGFjY2Vzc19pZF9hYTY0emZy MF9lbDEsIC5nZXRfdXNlciA9IGdldF9pZF9hYTY0emZyMF9lbDEsIC5zZXRfdXNlciA9IHNldF9p ZF9hYTY0emZyMF9lbDEsIC52aXNpYmlsaXR5ID0gc3ZlX2lkX3Zpc2liaWxpdHkgfSwKKwl7IFNZ U19ERVNDKFNZU19JRF9BQTY0WkZSMF9FTDEpLCBhY2Nlc3NfaWRfYWE2NHpmcjBfZWwxLCAuZ2V0 X3VzZXIgPSBnZXRfaWRfYWE2NHpmcjBfZWwxLCAuc2V0X3VzZXIgPSBzZXRfaWRfYWE2NHpmcjBf ZWwxLCB9LAogCUlEX1VOQUxMT0NBVEVEKDQsNSksCiAJSURfVU5BTExPQ0FURUQoNCw2KSwKIAlJ RF9VTkFMTE9DQVRFRCg0LDcpLAotLSAKMi4yNi4yCgpfX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fXwprdm1hcm0gbWFpbGluZyBsaXN0Cmt2bWFybUBsaXN0cy5j cy5jb2x1bWJpYS5lZHUKaHR0cHM6Ly9saXN0cy5jcy5jb2x1bWJpYS5lZHUvbWFpbG1hbi9saXN0 aW5mby9rdm1hcm0K