From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 1BF06C71136 for ; Tue, 17 Jun 2025 15:33:08 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:Cc:To:From:Subject:Message-ID: References:Mime-Version:In-Reply-To:Date:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=fS66u+gnP4HslIe9kNPz7eN110s4u4cJP0KwHJZZWgc=; b=c+ALG2J0n/fr41cn/WV9jpntww XmELQF0CcVgFNgshVMFjHEne8ex0Rqq/wP8o6HQUy84U37uzhjUI81+BH/4VUB5Wxw49xEe/G9fma OMM9BZY6knmXLZRDrVHNRyYPc0GfdgG/2yniavLh7Y8U1rsZBwvITYUTe1rgV43KnBttjfnl5+Mmi RG6BafMlH8pwODrqGNHCxSCQn1vzgumoJRKfr4FzjCAWAm71YaBHSiPeLRVwGlyvChPAHiseyhksO 5IonDcZXHq9EEZkFtPhAK/otrjOUQBZaNJznQacOPb7/c3tjStZqywXYQ1Qefu2GHwIJrGbxFLZq+ Vi5hDIbg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uRYJ2-00000007k2p-2YrW; Tue, 17 Jun 2025 15:33:00 +0000 Received: from mail-pf1-x44a.google.com ([2607:f8b0:4864:20::44a]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1uRXQI-00000007aGd-0UzN for linux-riscv@lists.infradead.org; Tue, 17 Jun 2025 14:36:27 +0000 Received: by mail-pf1-x44a.google.com with SMTP id d2e1a72fcca58-74620e98ec8so4801266b3a.1 for ; Tue, 17 Jun 2025 07:36:25 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1750170984; x=1750775784; darn=lists.infradead.org; h=content-transfer-encoding:cc:to:from:subject:message-id:references :mime-version:in-reply-to:date:from:to:cc:subject:date:message-id :reply-to; bh=uMwlSkCNIqJfHOH66+3JA30LqpAbnp8KrvmDSuhH/Ag=; b=G7Ai+eqlcrQeUVDcQidrxdSaSgyrgz4bAZ9+z8rg2pFlfn5m08GAAVYTEnh0d+wt7A N/+0ILtJc81m3Mtj8Wk2wJv+o40oYMId+dETbc0VUHJLPbsHP6Z7a3dq4Q6OJV5e//zo KzBTyw8iNahVoOzqRGkciLb4vNz2piLWPBEnznWTQvToheVf4p+TrlzBiaX8lJrUU4Ue HCV1eth3XzSN0pfwypZuyj506h0ld8ga8k6hoHzzPYSOShLMaJAxEqXXl3aNyxihlTTV qYNJj9ORNniGRzqccg1v9oNj4Y9GB7LQzCRz7Bm+OqSaNFKpfdFWxvkuYbDpaPOGNYTj tYYQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1750170984; x=1750775784; h=content-transfer-encoding:cc:to:from:subject:message-id:references :mime-version:in-reply-to:date:x-gm-message-state:from:to:cc:subject :date:message-id:reply-to; bh=uMwlSkCNIqJfHOH66+3JA30LqpAbnp8KrvmDSuhH/Ag=; b=MsSLFfhbySza4YfE4XkzZWQIGdrxac+t7a32CbYxKAx/YgZGB8iGbSUhpDENsIL3Fc Gs5vvBk9sUC12M8ysbSyn6n2Zo3O7ri2NhvwIBkYYdNrSS2+yetQXBZ2VX5Sk5PcVOth uv0WzkhBFgbq8xbCoe1WdykCvNaqWH7gy+PaV3ayx4cX5uDAGuoWd2p4VCUz8uBCasH7 vxmvuXYxiV4PKhGHw4oQRNm5rNLl/k7rcB4l98FgwF0fW+AbLBmqo6MQqc9L6pKeCdod gdk5gAYnZvquzgiUQYxb+RGTSYs+/S3G9ERY7+lrxBMrmalvU9YMT89E38ahgsXBBnLz tYTw== X-Forwarded-Encrypted: i=1; AJvYcCXX3Ex0i4keQN/hXO3CFMSds+7xomR8eKkeeajYgJYfob9dMauTY0himVtidL7DKZX9fRC1V9/Wee1J8w==@lists.infradead.org X-Gm-Message-State: AOJu0Yymf0WEgNksgaNv0uvQ0Ofey244FzsOuk4vE/Vcg6GIxMfap7TQ ZizL+XV45TXacqK9ExGEA+25pT3+zu+3L3P59dM2BEbrAjchYUtJtJFx6oWZgNNHSJ66wWIyvDA bz4CfOg== X-Google-Smtp-Source: AGHT+IFdJLXMZEEu8DdlQZ+U+oQwIvzvdGgAICIJ+geqiAScmpG1InwG5WTe3wRE1wV8wV8tzAaYKmdEpJA= X-Received: from pfnw6.prod.google.com ([2002:aa7:8586:0:b0:747:a8e8:603e]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a05:6a00:9181:b0:748:a0b9:f873 with SMTP id d2e1a72fcca58-748a0b9f8d2mr16220059b3a.9.1750170984466; Tue, 17 Jun 2025 07:36:24 -0700 (PDT) Date: Tue, 17 Jun 2025 07:36:22 -0700 In-Reply-To: Mime-Version: 1.0 References: <50989f0a02790f9d7dc804c2ade6387c4e7fbdbc.1749634392.git.zhouquan@iscas.ac.cn> <20250611-352bef23df9a4ec55fe5cb68@orel> <20250612-70c2e573983d05c4fbc41102@orel> Message-ID: Subject: Re: [PATCH] RISC-V: KVM: Avoid re-acquiring memslot in kvm_riscv_gstage_map() From: Sean Christopherson To: Anup Patel Cc: Andrew Jones , zhouquan@iscas.ac.cn, anup@brainfault.org, atishp@atishpatra.org, paul.walmsley@sifive.com, palmer@dabbelt.com, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org, kvm@vger.kernel.org, kvm-riscv@lists.infradead.org X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250617_073626_149273_8796E69C X-CRM114-Status: GOOD ( 13.80 ) 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: , 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 T24gU3VuLCBKdW4gMTUsIDIwMjUsIEFudXAgUGF0ZWwgd3JvdGU6Cj4gT24gU2F0LCBKdW4gMTQs IDIwMjUgYXQgMzo1OeKAr0FNIFNlYW4gQ2hyaXN0b3BoZXJzb24gPHNlYW5qY0Bnb29nbGUuY29t PiB3cm90ZToKPiA+Cj4gPiBPbiBUaHUsIEp1biAxMiwgMjAyNSwgQW5kcmV3IEpvbmVzIHdyb3Rl Ogo+ID4gPiBPbiBXZWQsIEp1biAxMSwgMjAyNSBhdCAwOToxNzozNkFNIC0wNzAwLCBTZWFuIENo cmlzdG9waGVyc29uIHdyb3RlOgo+ID4gPiA+IExvb2tzIGxpa2UgeSdhbGwgYWxzbyBoYXZlIGEg YnVnIHdoZXJlIGFuIC1FRVhJU1Qgd2lsbCBiZSByZXR1cm5lZCB0byB1c2Vyc3BhY2UsCj4gPiA+ ID4gYW5kIHdpbGwgZ2VuZXJhdGUgd2hhdCdzIHByb2JhYmx5IGEgc3B1cmlvdXMga3ZtX2Vycigp IG1lc3NhZ2UuCj4gPiA+Cj4gPiA+IE9uIDMyLWJpdCByaXNjdiwgZHVlIHRvIGxvc2luZyB0aGUg dXBwZXIgYml0cyBvZiB0aGUgcGh5c2ljYWwgYWRkcmVzcz8gT3IKPiA+ID4gaXMgdGhlcmUgeWV0 IGFub3RoZXIgdGhpbmcgdG8gZml4Pwo+ID4KPiA+IEFub3RoZXIgYnVnLCBJIHRoaW5rLiAgZ3N0 YWdlX3NldF9wdGUoKSByZXR1cm5zIC1FRVhJU1QgaWYgYSBQVEUgZXhpc3RzLCBhbmQgSQo+ID4g X2Fzc3VtZV8gdGhhdCdzIHN1cHBvc2VkIHRvIGJlIGJlbmlnbj8gIEJ1dCB0aGlzIGNvZGUgcmV0 dXJucyBpdCBibGluZGx5Ogo+IAo+IGdzdGFnZV9zZXRfcHRlKCkgcmV0dXJucyAtRUVYSVNUIG9u bHkgd2hlbiBpdCB3YXMgZXhwZWN0aW5nIGEgbm9uLWxlYWYKPiBQVEUgYXQgYSBwYXJ0aWN1bGFy IGxldmVsIGJ1dCBnb3QgYSBsZWFmIFBURSAKClJpZ2h0LCBidXQgaXNuJ3QgcmV0dXJuaW5nIC1F RVhJU1QgYWxsIHRoZSB3YXkgdG8gdXNlcnNwYWNlIHVuZGVzaXJhYmxlIGJlaGF2aW9yPwoKRS5n LiBpbiB0aGlzIHNlcXVlbmNlLCBLVk0gd2lsbCByZXR1cm4gLUVFWElTVCBhbmQgaW5jb3JyZWN0 bHkgdGVybWluYXRlIHRoZSBWTQooYXNzdW1pbmcgdGhlIFZNTSBkb2Vzbid0IG1pcmFjdWxvdXNs eSByZWNvdmVyIHNvbWVob3cpOgoKIDEuIEJhY2sgdGhlIFZNIHdpdGggSHVnZVRMQkZTCiAyLiBG YXVsdC1pbiBtZW1vcnksIGkuZS4gY3JlYXRlIGh1Z2VwYWdlIG1hcHBpbmdzCiAzLiBFbmFibGUg S1ZNX01FTV9MT0dfRElSVFlfUEFHRVMKIDQuIFdyaXRlLXByb3RlY3Rpb24gZmF1bHQsIGt2bV9y aXNjdl9nc3RhZ2VfbWFwKCkgdHJpZXMgdG8gY3JlYXRlIGEgd3JpdGFibGUKICAgIG5vbi1odWdl IG1hcHBpbmcuCiA1LiBnc3RhZ2Vfc2V0X3B0ZSgpIGVuY291bnRlcnMgdGhlIGh1Z2UgbGVhZiBQ VEUgYmVmb3JlIHJlYWNoaW5nIHRoZSB0YXJnZXQKICAgIGxldmVsLCBhbmQgcmV0dXJucyAtRUVY SVNULgoKQUZBSUNULCBnc3RhZ2Vfd3BfbWVtb3J5X3JlZ2lvbigpIGRvZXNuJ3Qgc3BsaXQvc2hh dHRlci9kZW1vdGUgaHVnZXBhZ2VzLCBpdApzaW1wbHkgY2xlYXJzIF9QQUdFX1dSSVRFLgoKSXQn cyBlbnRpcmVseSBwb3NzaWJsZSBJJ20gbWlzc2luZyBzb21ldGhpbmcgdGhhdCBtYWtlcyB0aGUg YWJvdmUgc2NlbmFyaW8KaW1wb3NzaWJsZSBpbiBwcmFjdGljZSwgYnV0IGF0IHRoaXMgcG9pbnQg SSdtIGdlbnVpbmVseSBjdXJpb3VzIDotKQoKX19fX19fX19fX19fX19fX19fX19fX19fX19fX19f X19fX19fX19fX19fX19fX18KbGludXgtcmlzY3YgbWFpbGluZyBsaXN0CmxpbnV4LXJpc2N2QGxp c3RzLmluZnJhZGVhZC5vcmcKaHR0cDovL2xpc3RzLmluZnJhZGVhZC5vcmcvbWFpbG1hbi9saXN0 aW5mby9saW51eC1yaXNjdgo=