From patchwork Wed Jun 21 17:50:00 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: 13287819 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C3AABEB64D8 for ; Wed, 21 Jun 2023 17:51:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231551AbjFURvm (ORCPT ); Wed, 21 Jun 2023 13:51:42 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52538 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231723AbjFURus (ORCPT ); Wed, 21 Jun 2023 13:50:48 -0400 Received: from mail-io1-xd4a.google.com (mail-io1-xd4a.google.com [IPv6:2607:f8b0:4864:20::d4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4FA1C212B for ; Wed, 21 Jun 2023 10:50:31 -0700 (PDT) Received: by mail-io1-xd4a.google.com with SMTP id ca18e2360f4ac-7809f96b1bfso269992239f.3 for ; Wed, 21 Jun 2023 10:50:31 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1687369830; x=1689961830; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=kpR1MspLCCKbLGu542rFrU99snL12qe0SU5vnENHbnc=; b=obkQNETduI4Wdlr8DqbH6rQDpqF2mUi0lafiiZR1QXrNN2+tKemED10KMGrakG13Nq +F9e7JIuRjiRR9EfoJnua+9jPsENy4Tu90Vrn/2nK11OMp8Aj/golURDqyPfJ94Cfrxi hdWdLoNiohD/PMMDEG0mtQHMd7A92j4tIxNPh8D/cM9gYPH0WwqnOU4OcPsZKdr9HTOs pyGKjpe6+P6Xcb6ByP94N+J+yZmYDJogpjw8kcjVcP5B1YTqtAJdqi8Hp9kutYXKuAUx OCxMudA25zodKFZSyAwbz9vLyvHyzcqnxGuKjUldsdPVjyx7x6uGCQbzc3ZzHDMDOM0D Kg8A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1687369830; x=1689961830; 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=kpR1MspLCCKbLGu542rFrU99snL12qe0SU5vnENHbnc=; b=Ks6Lxot2Kb23yCKRNn8DLWn5yWlJBHN8F7YuXemQ0uFGGlyMayleLvvPKI43fZc4qO yVRvNbpJQUf8h8rlydBTCIXZVMME4xQ3kJBZ6T5AlIUfqBcGrVe9gINM2mOoEjxySJ+q nY1SNZlzwPT33CW9WVIHp9ClKYhFpIoLxbdNH/1AW4MZ6Nb61djtYAZ+KHgbm+fRyk6a NTIJad4s4VY1mPOeYQdD209Lk796JNxJLGF0cT2jNICPrLqCHHFkrqz44Gd9+mWI56lC hYJTs7wcSYUVRJ+HZ3t/TDP8tpNiyttJZbqVYVchYdU3f66gZcpz21I3WPhan3eiinN5 cDPA== X-Gm-Message-State: AC+VfDwkCoUYNutveoYS4gcAS9Z6LcFRtAI8hjDKHAcuY4tMP0vXDvKe Huz5E8tGqBr9az0tfoXgppI3WW9lMLhG X-Google-Smtp-Source: ACHHUZ6lEejYkvXSZImNPgkcjtxASyr0tUJRYFuyzfo7eVoPr61PQ+mo3lAqnIjMYGuKsT4NfkEe3+3Un922 X-Received: from rananta-linux.c.googlers.com ([fda3:e722:ac3:cc00:2b:ff92:c0a8:22b5]) (user=rananta job=sendgmr) by 2002:a05:6602:152:b0:777:b38d:2333 with SMTP id v18-20020a056602015200b00777b38d2333mr5713635iot.3.1687369830330; Wed, 21 Jun 2023 10:50:30 -0700 (PDT) Date: Wed, 21 Jun 2023 17:50:00 +0000 In-Reply-To: <20230621175002.2832640-1-rananta@google.com> Mime-Version: 1.0 References: <20230621175002.2832640-1-rananta@google.com> X-Mailer: git-send-email 2.41.0.162.gfafddb0af9-goog Message-ID: <20230621175002.2832640-10-rananta@google.com> Subject: [RESEND PATCH v5 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 Precedence: bulk List-ID: X-Mailing-List: linux-mips@vger.kernel.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 --- 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 c3ec2141c3284..94f10e670c100 100644 --- a/arch/arm64/kvm/mmu.c +++ b/arch/arm64/kvm/mmu.c @@ -992,7 +992,7 @@ 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); } /**