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Thu, 10 Oct 2024 11:25:38 -0700 (PDT) Date: Thu, 10 Oct 2024 11:23:24 -0700 In-Reply-To: <20241010182427.1434605-1-seanjc@google.com> Mime-Version: 1.0 References: <20241010182427.1434605-1-seanjc@google.com> X-Mailer: git-send-email 2.47.0.rc1.288.g06298d1525-goog Message-ID: <20241010182427.1434605-23-seanjc@google.com> Subject: [PATCH v13 22/85] KVM: Use NULL for struct page pointer to indicate mremapped memory From: Sean Christopherson To: Paolo Bonzini , Marc Zyngier , Oliver Upton , Tianrui Zhao , Bibo Mao , Huacai Chen , Michael Ellerman , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , Sean Christopherson Cc: kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, "=?UTF-8?q?Alex=20Benn=C3=A9e?=" , Yan Zhao , David Matlack , David Stevens , Andrew Jones X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20241010_112540_385079_63EE7EB4 X-CRM114-Status: GOOD ( 14.28 ) X-BeenThere: linux-riscv@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Sean Christopherson Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: base64 Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org RHJvcCB5ZXQgYW5vdGhlciB1bm5lY2Vzc2FyeSBtYWdpYyBwYWdlIHZhbHVlIGZyb20gS1ZNLCBh cyB0aGVyZSdzIHplcm8KcmVhc29uIHRvIHVzZSBhIHBvaXNvbmVkIHBvaW50ZXIgdG8gaW5kaWNh dGUgIm5vIHBhZ2UiLiAgSWYgS1ZNIHVzZXMgYQpOVUxMIHBhZ2UgcG9pbnRlciwgdGhlIGtlcm5l bCB3aWxsIGV4cGxvZGUganVzdCBhcyBxdWlja2x5IGFzIGlmIEtWTSB1c2VzCmEgcG9pc29uZWQg cG9pbnRlci4gIE5ldmVyIG1pbmQgdGhlIGZhY3QgdGhhdCBzdWNoIHVzYWdlIHdvdWxkIGJlIGEK YmxhdGFudCBhbmQgZWdyZWdpb3VzIEtWTSBidWcuCgpUZXN0ZWQtYnk6IEFsZXggQmVubsOpZSA8 YWxleC5iZW5uZWVAbGluYXJvLm9yZz4KU2lnbmVkLW9mZi1ieTogU2VhbiBDaHJpc3RvcGhlcnNv biA8c2VhbmpjQGdvb2dsZS5jb20+Ci0tLQogaW5jbHVkZS9saW51eC9rdm1faG9zdC5oIHwgNCAt LS0tCiB2aXJ0L2t2bS9rdm1fbWFpbi5jICAgICAgfCA0ICsrLS0KIDIgZmlsZXMgY2hhbmdlZCwg MiBpbnNlcnRpb25zKCspLCA2IGRlbGV0aW9ucygtKQoKZGlmZiAtLWdpdCBhL2luY2x1ZGUvbGlu dXgva3ZtX2hvc3QuaCBiL2luY2x1ZGUvbGludXgva3ZtX2hvc3QuaAppbmRleCBjYmM3YjljMDRj MTQuLmUzYzAxY2JiYzQxYSAxMDA2NDQKLS0tIGEvaW5jbHVkZS9saW51eC9rdm1faG9zdC5oCisr KyBiL2luY2x1ZGUvbGludXgva3ZtX2hvc3QuaApAQCAtMjczLDE2ICsyNzMsMTIgQEAgZW51bSB7 CiAJUkVBRElOR19TSEFET1dfUEFHRV9UQUJMRVMsCiB9OwogCi0jZGVmaW5lIEtWTV9VTk1BUFBF RF9QQUdFCSgodm9pZCAqKSAweDUwMCArIFBPSVNPTl9QT0lOVEVSX0RFTFRBKQotCiBzdHJ1Y3Qg a3ZtX2hvc3RfbWFwIHsKIAkvKgogCSAqIE9ubHkgdmFsaWQgaWYgdGhlICdwZm4nIGlzIG1hbmFn ZWQgYnkgdGhlIGhvc3Qga2VybmVsIChpLmUuIFRoZXJlIGlzCiAJICogYSAnc3RydWN0IHBhZ2Un IGZvciBpdC4gV2hlbiB1c2luZyBtZW09IGtlcm5lbCBwYXJhbWV0ZXIgc29tZSBtZW1vcnkKIAkg KiBjYW4gYmUgdXNlZCBhcyBndWVzdCBtZW1vcnkgYnV0IHRoZXkgYXJlIG5vdCBtYW5hZ2VkIGJ5 IGhvc3QKIAkgKiBrZXJuZWwpLgotCSAqIElmICdwZm4nIGlzIG5vdCBtYW5hZ2VkIGJ5IHRoZSBo b3N0IGtlcm5lbCwgdGhpcyBmaWVsZCBpcwotCSAqIGluaXRpYWxpemVkIHRvIEtWTV9VTk1BUFBF RF9QQUdFLgogCSAqLwogCXN0cnVjdCBwYWdlICpwYWdlOwogCXZvaWQgKmh2YTsKZGlmZiAtLWdp dCBhL3ZpcnQva3ZtL2t2bV9tYWluLmMgYi92aXJ0L2t2bS9rdm1fbWFpbi5jCmluZGV4IGYxYzlh NzgxMzE1Yy4uN2FjYjFhOGFmMmU0IDEwMDY0NAotLS0gYS92aXJ0L2t2bS9rdm1fbWFpbi5jCisr KyBiL3ZpcnQva3ZtL2t2bV9tYWluLmMKQEAgLTMwNjcsNyArMzA2Nyw3IEBAIHZvaWQga3ZtX3Jl bGVhc2VfcGZuKGt2bV9wZm5fdCBwZm4sIGJvb2wgZGlydHkpCiAKIGludCBrdm1fdmNwdV9tYXAo c3RydWN0IGt2bV92Y3B1ICp2Y3B1LCBnZm5fdCBnZm4sIHN0cnVjdCBrdm1faG9zdF9tYXAgKm1h cCkKIHsKLQltYXAtPnBhZ2UgPSBLVk1fVU5NQVBQRURfUEFHRTsKKwltYXAtPnBhZ2UgPSBOVUxM OwogCW1hcC0+aHZhID0gTlVMTDsKIAltYXAtPmdmbiA9IGdmbjsKIApAQCAtMzA5Myw3ICszMDkz LDcgQEAgdm9pZCBrdm1fdmNwdV91bm1hcChzdHJ1Y3Qga3ZtX3ZjcHUgKnZjcHUsIHN0cnVjdCBr dm1faG9zdF9tYXAgKm1hcCwgYm9vbCBkaXJ0eSkKIAlpZiAoIW1hcC0+aHZhKQogCQlyZXR1cm47 CiAKLQlpZiAobWFwLT5wYWdlICE9IEtWTV9VTk1BUFBFRF9QQUdFKQorCWlmIChtYXAtPnBhZ2Up CiAJCWt1bm1hcChtYXAtPnBhZ2UpOwogI2lmZGVmIENPTkZJR19IQVNfSU9NRU0KIAllbHNlCi0t IAoyLjQ3LjAucmMxLjI4OC5nMDYyOThkMTUyNS1nb29nCgoKX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX19fX19fX19fX18KbGludXgtcmlzY3YgbWFpbGluZyBsaXN0CmxpbnV4 LXJpc2N2QGxpc3RzLmluZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFp bG1hbi9saXN0aW5mby9saW51eC1yaXNjdgo=