From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-yw1-f202.google.com (mail-yw1-f202.google.com [209.85.128.202]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 0DA8410F1 for ; Fri, 11 Aug 2023 04:51:48 +0000 (UTC) Received: by mail-yw1-f202.google.com with SMTP id 00721157ae682-569e7aec37bso19868687b3.2 for ; Thu, 10 Aug 2023 21:51:48 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1691729508; x=1692334308; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=P6qPiqYiGdEy+ALMWmUClgOJtf7MJwHf5G0engyYFuk=; b=qrcaMEcSpq+ULmZt9JgV/iXS5+x9ZwEslbJLOWWZHpe9tEaJ28kJ0dsZTFh+wHaZVY z/+PWbhe4kPyyucCymXKpbVkBUvDdebb4moSiMcKue6hrkGuTyTFlQ2SS1ZDAmF+7o2K JIqhRUzm+nxJK7sCky9lN7UwOaQ9GwOZduGzIbm/TwSEScjePA4FFoYCus4bBKN6ke8D wf+zv3/75Th+zNlJ44hzGeBSVubCWPJjE5lDfkpmjoMYIWdYXie5RHK61lA9sT3xtR4j o2HtqwDGpSxcDAOl6CF9D9EeEbTPBni26ZJIeebSWG7wMNG4nNsXFqjiD04Lfm8rlpNh SVOA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691729508; x=1692334308; 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=P6qPiqYiGdEy+ALMWmUClgOJtf7MJwHf5G0engyYFuk=; b=Sie3JQFK0HpG09gUgnvG7NIaTjDjeSxVUd+U17L9rCQvy4AaQNe26MZ5gLwJNovD7V m7b7z3ued7s7sUezZDg0ixIKkcpsGMlAFzdXGJoNQNEnWCAh/Luq4zDNqFWdlZPNdcdC X8xjiFIwrkrLC3RwWr8PXJB0Mnsoj3QlTKBOKn5sWePVWFehN/22IcufBnQsLRZ3WN7z jseyBuHa4xXdxNCd9kSkp0X1o+DAFlR2yrNKyz0M32Jbs6BEOmDVAiE1pNU4Nj+rNso1 cvL6TtLopn1Fb4lGg5XdHTorBKMX+DJZaflkJcWNUOFCfm2Ve2VLcoUQtErZtMxWPTrk VVbQ== X-Gm-Message-State: AOJu0YxZ4OaA4CQ2NskrrFvQTxv05yJE9yb2umim0enFrr4htDeRSab8 xbM/2LJeMqUGjA0/5NV5k8fL/Zj35at2 X-Google-Smtp-Source: AGHT+IGXV3TrUe7VdEmoyRMybbrBwXMmeig9Hy139aV3xPrm/bppO8Uhrj80L5wM2TEVNSyoFL3mzf/IgjNd X-Received: from rananta-linux.c.googlers.com ([fda3:e722:ac3:cc00:2b:ff92:c0a8:22b5]) (user=rananta job=sendgmr) by 2002:a81:b71b:0:b0:589:bfc5:d80b with SMTP id v27-20020a81b71b000000b00589bfc5d80bmr14055ywh.2.1691729508012; Thu, 10 Aug 2023 21:51:48 -0700 (PDT) Date: Fri, 11 Aug 2023 04:51:25 +0000 In-Reply-To: <20230811045127.3308641-1-rananta@google.com> Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: Mime-Version: 1.0 References: <20230811045127.3308641-1-rananta@google.com> X-Mailer: git-send-email 2.41.0.640.ga95def55d0-goog Message-ID: <20230811045127.3308641-13-rananta@google.com> Subject: [PATCH v9 12/14] 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 , Reiji Watanabe , Colton Lewis , Raghavendra Rao Anata , David Matlack , Fuad Tabba , 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 , Shaoqin Huang Content-Type: text/plain; charset="UTF-8" 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 702f8715f9fe7..6f44896936b47 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -1083,7 +1083,7 @@ 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); } /** -- 2.41.0.640.ga95def55d0-goog