From patchwork Sat Jul 15 00:54:03 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Raghavendra Rao Ananta X-Patchwork-Id: 13314302 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 C75E9EB64DC for ; Sat, 15 Jul 2023 00:55:08 +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=xtYi/MYzDl5laUvk7IlV9O3Xq2oQwkBkSvtw8Jn0kA8=; b=bo+xiUfGu6hQOn0BBOC+W5VMSt IQWOTBNDM+BUzpPVayBjcOnKTrcKIL4NByO44ATiPMj7G5rAD/q4qErvQyDdClCUkL30XKEgNdHwO dcTe3Yh5uBBTsFQUoUhsQa4slnCjWRmGIfeeLrJg+RApGQ1ykl8IJg73EGuI+pRRDRnuj+TLnHOZX qud7k2deMl4q7PQyxj1TRrNkhbA98G7N8D60L6wTvT76FeovAnIwwnljrUFlH8FWRhkt8iDbjgZ19 A7SWRjtO26Uma4iVDy/dK9cZ5QfidQyrxICGD4cAXtOyP+Yk8svqq5d+0E6UHBODjuqWmj8ujgMLS bsvptkNA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qKTYv-007aob-0l; Sat, 15 Jul 2023 00:55:05 +0000 Received: from mail-yb1-xb49.google.com ([2607:f8b0:4864:20::b49]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qKTYD-007aFS-1X for linux-riscv@lists.infradead.org; Sat, 15 Jul 2023 00:54:26 +0000 Received: by mail-yb1-xb49.google.com with SMTP id 3f1490d57ef6-c6db61f7f64so2095439276.0 for ; Fri, 14 Jul 2023 17:54:20 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1689382460; x=1689987260; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=NQY+Dtk1XWrNNGuHSHxbkYrauldxXbZA83USiWOTL6o=; b=TCgWEy2z8oOGQwvnSBHn0AkAkVSlT9c37MgvWUaNlBXCNKNpJR/vOwVyuvEfVCFhZH 75Djs6cT8vsl01b8fPqnk9tIFBiF7zvqtCVYGWLZuWsMETu/RPDzgHfQJ0N6NM5C6vOx hB+mAtMX3eXFTzff5OpvcbDHdQLWnoerWsIudu0SL4c3QoXFOjZqkSdjyoCJtPVXGr6W //LvcxbEku4U7vC3//3dhn54WTCVJcS92mQ6c7NC+uGD3MBXy3sOfSBG1WMjwOX4vcYi XoUh9543oJXJngnlcI/Jw0nJMM49HqIHNGb/O4YAGu77Z/SnUdDFBBfexEdSrvLeIvbz Ltlg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689382460; x=1689987260; h=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=NQY+Dtk1XWrNNGuHSHxbkYrauldxXbZA83USiWOTL6o=; b=VSiYOc8u4YBGp3876yCRnJwNCBuD5RdczTTkR/x/ptA5nJVjA+/3epf5J1u1xX/vrL cUBQweSB3hGOyRbNI5U2zqTP3B9J/egUU8gwsxtsfBHnGKYhqFu6DQQkCWE/tLYXncgv nS6dZG7A3s35NMo8kty3VK5jzbmelTOO4jnffcRzzKkEbqaekfvvSRv9AlANFUcKVI6Y 4xxLejw/p8XkZq9j0s6qUyjIu65cAStBKk6Ys8yJ5F7OHDpkoc3w945c6T56meuqOKAa my63VDPLrhA8jw1ayN2TvbGo1pdKO2IZPFMB+akW2y7K/nkurUIALpMhLEYEK0e/rg94 tBGg== X-Gm-Message-State: ABy/qLZam/GgSEwKQTwC6r5zlb50b0vzogm5CcNbpsDPhp+rW7VyEOOa WHyS7eme2dWvfzI7sYyX3Yz5CVZeRTaW X-Google-Smtp-Source: APBJJlG5n3Bft6SS+LPAWDb1hmMGpZKEdbwJGhCcCMWgOINPk2C5Y/61Tx4AtYFAIRblEEw/+bRH7gfv6I55 X-Received: from rananta-linux.c.googlers.com ([fda3:e722:ac3:cc00:2b:ff92:c0a8:22b5]) (user=rananta job=sendgmr) by 2002:a25:ab81:0:b0:c5f:85f5:a0e5 with SMTP id v1-20020a25ab81000000b00c5f85f5a0e5mr14207ybi.5.1689382460190; Fri, 14 Jul 2023 17:54:20 -0700 (PDT) Date: Sat, 15 Jul 2023 00:54:03 +0000 In-Reply-To: <20230715005405.3689586-1-rananta@google.com> Mime-Version: 1.0 References: <20230715005405.3689586-1-rananta@google.com> X-Mailer: git-send-email 2.41.0.455.g037347b96a-goog Message-ID: <20230715005405.3689586-10-rananta@google.com> Subject: [PATCH v6 09/11] KVM: arm64: Flush only the memslot after write-protect From: Raghavendra Rao Ananta To: Oliver Upton , Marc Zyngier , James Morse , Suzuki K Poulose Cc: Paolo Bonzini , Sean Christopherson , Huacai Chen , Zenghui Yu , Anup Patel , Atish Patra , Jing Zhang , Colton Lewis , Raghavendra Rao Anata , David Matlack , linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, linux-mips@vger.kernel.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, kvm@vger.kernel.org, Gavin Shan X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230714_175421_560471_8EF852A5 X-CRM114-Status: UNSURE ( 9.42 ) X-CRM114-Notice: Please train this message. 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: , Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org After write-protecting the region, currently KVM invalidates the entire TLB entries using kvm_flush_remote_tlbs(). Instead, scope the invalidation only to the targeted memslot. If supported, the architecture would use the range-based TLBI instructions to flush the memslot or else fallback to flushing all of the TLBs. Signed-off-by: Raghavendra Rao Ananta Reviewed-by: Gavin Shan Reviewed-by: Shaoqin Huang --- arch/arm64/kvm/mmu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c index 387f2215fde7..985f605e2abc 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -1082,7 +1082,7 @@ static void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot) write_lock(&kvm->mmu_lock); stage2_wp_range(&kvm->arch.mmu, start, end); write_unlock(&kvm->mmu_lock); - kvm_flush_remote_tlbs(kvm); + kvm_flush_remote_tlbs_memslot(kvm, memslot); } /**