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 32396CCD1A2 for ; Fri, 17 Oct 2025 00:35:00 +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:Reply-To: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:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=4Bv6HAJK5lb3Jmjdx7tCAdaqjrPktaNdbm465BDxELQ=; b=nDo5ElHbTWshQT /yc7wA1ATCO5biQhanOsPjrUHvTDpABGzBl8MM067OOPoyqxaGP9yzTJGryxkdnkoSD4yesvehqwN BaYiuwaQJWjrKTgpB7X2/EjmJ8KInuE1Z/4VQCQqIA7V5NxO7S2LYo4HTmJGfcftGhj75YY517qpE lpmtG8P4NrGBXJXM8kZa9brRlQWBjPy0hwnJGoZzVrXVO24yICAL74oQfVB27oHZHal5HIKzcsfcj lxHwpToSQOwwa/kI7kzgEMn8nnuK9AQFaZWcKvLFhW4CCt9yUN0hb17Y4jxnOVIwaVCNBWqkUASeU zNd/xa8H4dQxLzaOxl1g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1v9YQe-00000006FHU-2gie; Fri, 17 Oct 2025 00:34:44 +0000 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1v9YPZ-00000006Daa-32l9 for linux-riscv@bombadil.infradead.org; Fri, 17 Oct 2025 00:33:38 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Type:Cc:To:From:Subject: Message-ID:References:Mime-Version:In-Reply-To:Date:Reply-To:Sender: Content-Transfer-Encoding:Content-ID:Content-Description; bh=WBWRMN6X3w3vTrUF8QjNUM8q/tVPNzKCX5eXLQ+Uu38=; b=fhLxZYev8G1f+n9WmMZX/V75HK IUelcdWdEpP2VQZ/oRyFVw3etWWXPDoZtOp4SanzyQaOUdKWAYnOeSi5t5rGJdeKTXVVfKBed+xrk uzLsDTsv2ibnT77nD0CsGOZ3maENVu2hplekfkqOWshkVDn0ccElcZYQJOMjAgrc9CFm0DQ/Ur3jy liZNUQHMa7g2nYXgVGmEo5Pygmii6nCakecmL8FffuCZ3csRO3Z3AWleiMcMsgqREOs2IcpI+rG76 H/oHlBFDKOGvSAkcIVB+o/f+EYPVwhQkkIZSTuJ2IO1fDM4vgJ3E0t8sLOIj+gpDPs5dKT3V8MUCD 29gE2OqQ==; Received: from mail-pj1-x104a.google.com ([2607:f8b0:4864:20::104a]) by casper.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1v9YPU-0000000FiEU-1PUO for linux-riscv@lists.infradead.org; Fri, 17 Oct 2025 00:33:35 +0000 Received: by mail-pj1-x104a.google.com with SMTP id 98e67ed59e1d1-336b9f3b5b0so1476577a91.3 for ; Thu, 16 Oct 2025 17:33:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20230601; t=1760661196; x=1761265996; darn=lists.infradead.org; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:from:to:cc:subject:date:message-id:reply-to; bh=WBWRMN6X3w3vTrUF8QjNUM8q/tVPNzKCX5eXLQ+Uu38=; b=EJVCo06tnO+whKZkT3gHcJw1k3BxRuJpcUZftBWqFLiiW6L+ZYbr6LlRtQgFNI2Y6H TSMrOzyijaX0bMiZ5iba0F/zHShVTYSzSr+NkJbnTDF7t4G6ogOlAcYuWLNYq4j7On/h 09UmfQhZQs0X+YTqObvX5r84CtnwA7ChzvqVAhLvvFTJm7Uxa215lLZsDZ3mdFn4ssHF iiEFAcwtx5f1Ai20zwffgqkq9r3Heck9XKNaG4/rmn11g1yesHNxETX/qw/xNSKdWuyv v91zMONO7XeGwO16lmieOwTuStnbkLS6ejlC70eO1SCOqeWGRyjKeRZeOO2MYn6JMNET 4kxg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1760661196; x=1761265996; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:reply-to:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=WBWRMN6X3w3vTrUF8QjNUM8q/tVPNzKCX5eXLQ+Uu38=; b=LO5ARSysvTdwgLoYNpkNUP3Pq9laZpdooaRFNFqWMmYfVmMaeg327w0B0zclCVyi9e P01bqEH8ZcKsf7MqDmoywQ2wNCrsEq8G91xHa399vzD/KwQqFZReqUmF0VNh57Ul5kyO 38S5nQWK5tFQyjAcD+F/JmUegxkEwx7EDtgS9B+7/wHL9JG0lPirxdEqHtt8AiwyuGcr Axqfb4E9eoFgyB9qA9Njvs/DpwOZtNYT0i+q2JEBqK4SEhPcoJ6hjOdFCkAlXAxjfGC+ Ikz47ySksohOUrq/G1ccYdPsT3mRMEaJ1KvqCwjLb29UDV8Y1HMJqTBNX9txaeCuH3zm NSTg== X-Forwarded-Encrypted: i=1; AJvYcCU1/k8cZrjC7HNfOr7zy8nd6DIWGEiHn4X2Y5zwMBeU8j30V/ssg9uCdqGmdNYeWR/FVVUtbM/x69Fu2g==@lists.infradead.org X-Gm-Message-State: AOJu0YwMPK0wO6cXatdzhcjIwqo1zmU4sh2k15OTFvOgQDfrwAhetvoM 9fys4jxqiSMquwyaHg+gz8+eQZGiR7D3T5ScXIJmq70Ra3FVaRxIoRiZPYpIe+yHFGPkgiE6Jwf BSPURFg== X-Google-Smtp-Source: AGHT+IH07aQeXAQe/gpM4oI6RLK2u3p52mKtLGzZsiMbsodE1gcNl3/aTBVcK7Ae83foyLaxFhiKihoxiME= X-Received: from pjbpt2.prod.google.com ([2002:a17:90b:3d02:b0:329:e84e:1c50]) (user=seanjc job=prod-delivery.src-stubby-dispatcher) by 2002:a17:90a:c2c3:b0:32e:4924:6902 with SMTP id 98e67ed59e1d1-33bcf85a829mr1565388a91.3.1760661196491; Thu, 16 Oct 2025 17:33:16 -0700 (PDT) Date: Thu, 16 Oct 2025 17:32:34 -0700 In-Reply-To: <20251017003244.186495-1-seanjc@google.com> Mime-Version: 1.0 References: <20251017003244.186495-1-seanjc@google.com> X-Mailer: git-send-email 2.51.0.858.gf9c4a03a3a-goog Message-ID: <20251017003244.186495-17-seanjc@google.com> Subject: [PATCH v3 16/25] KVM: TDX: Fold tdx_sept_zap_private_spte() into tdx_sept_remove_private_spte() From: Sean Christopherson To: Marc Zyngier , Oliver Upton , Tianrui Zhao , Bibo Mao , Huacai Chen , Madhavan Srinivasan , Anup Patel , Paul Walmsley , Palmer Dabbelt , Albert Ou , Christian Borntraeger , Janosch Frank , Claudio Imbrenda , Sean Christopherson , Paolo Bonzini , "Kirill A. Shutemov" Cc: linux-arm-kernel@lists.infradead.org, kvmarm@lists.linux.dev, kvm@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, kvm-riscv@lists.infradead.org, linux-riscv@lists.infradead.org, x86@kernel.org, linux-coco@lists.linux.dev, linux-kernel@vger.kernel.org, Ira Weiny , Kai Huang , Michael Roth , Yan Zhao , Vishal Annapurve , Rick Edgecombe , Ackerley Tng , Binbin Wu X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20251017_013333_614686_C0A7EFE8 X-CRM114-Status: GOOD ( 10.59 ) 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="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-riscv" Errors-To: linux-riscv-bounces+linux-riscv=archiver.kernel.org@lists.infradead.org Do TDH_MEM_RANGE_BLOCK directly in tdx_sept_remove_private_spte() instead of using a one-off helper now that the nr_premapped tracking is gone. Opportunistically drop the WARN on hugepages, which was dead code (see the KVM_BUG_ON() in tdx_sept_remove_private_spte()). No functional change intended. Reviewed-by: Rick Edgecombe Signed-off-by: Sean Christopherson --- arch/x86/kvm/vmx/tdx.c | 41 +++++++++++------------------------------ 1 file changed, 11 insertions(+), 30 deletions(-) diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c index 76030461c8f7..d77b2de6db8a 100644 --- a/arch/x86/kvm/vmx/tdx.c +++ b/arch/x86/kvm/vmx/tdx.c @@ -1679,33 +1679,6 @@ static int tdx_sept_link_private_spt(struct kvm *kvm, gfn_t gfn, return 0; } -static int tdx_sept_zap_private_spte(struct kvm *kvm, gfn_t gfn, - enum pg_level level, struct page *page) -{ - int tdx_level = pg_level_to_tdx_sept_level(level); - struct kvm_tdx *kvm_tdx = to_kvm_tdx(kvm); - gpa_t gpa = gfn_to_gpa(gfn) & KVM_HPAGE_MASK(level); - u64 err, entry, level_state; - - /* For now large page isn't supported yet. */ - WARN_ON_ONCE(level != PG_LEVEL_4K); - - err = tdh_mem_range_block(&kvm_tdx->td, gpa, tdx_level, &entry, &level_state); - - if (unlikely(tdx_operand_busy(err))) { - /* After no vCPUs enter, the second retry is expected to succeed */ - tdx_no_vcpus_enter_start(kvm); - err = tdh_mem_range_block(&kvm_tdx->td, gpa, tdx_level, &entry, &level_state); - tdx_no_vcpus_enter_stop(kvm); - } - - if (KVM_BUG_ON(err, kvm)) { - pr_tdx_error_2(TDH_MEM_RANGE_BLOCK, err, entry, level_state); - return -EIO; - } - return 1; -} - /* * Ensure shared and private EPTs to be flushed on all vCPUs. * tdh_mem_track() is the only caller that increases TD epoch. An increase in @@ -1786,7 +1759,6 @@ static void tdx_sept_remove_private_spte(struct kvm *kvm, gfn_t gfn, struct kvm_tdx *kvm_tdx = to_kvm_tdx(kvm); gpa_t gpa = gfn_to_gpa(gfn); u64 err, entry, level_state; - int ret; /* * HKID is released after all private pages have been removed, and set @@ -1800,9 +1772,18 @@ static void tdx_sept_remove_private_spte(struct kvm *kvm, gfn_t gfn, if (KVM_BUG_ON(level != PG_LEVEL_4K, kvm)) return; - ret = tdx_sept_zap_private_spte(kvm, gfn, level, page); - if (ret <= 0) + err = tdh_mem_range_block(&kvm_tdx->td, gpa, tdx_level, &entry, &level_state); + if (unlikely(tdx_operand_busy(err))) { + /* After no vCPUs enter, the second retry is expected to succeed */ + tdx_no_vcpus_enter_start(kvm); + err = tdh_mem_range_block(&kvm_tdx->td, gpa, tdx_level, &entry, &level_state); + tdx_no_vcpus_enter_stop(kvm); + } + + if (KVM_BUG_ON(err, kvm)) { + pr_tdx_error_2(TDH_MEM_RANGE_BLOCK, err, entry, level_state); return; + } /* * TDX requires TLB tracking before dropping private page. Do -- 2.51.0.858.gf9c4a03a3a-goog _______________________________________________ linux-riscv mailing list linux-riscv@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-riscv