From patchwork Tue Aug 8 23:13:26 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: 13347206 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 898DAC04A94 for ; Tue, 8 Aug 2023 23:14:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231942AbjHHXOD (ORCPT ); Tue, 8 Aug 2023 19:14:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34514 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231933AbjHHXNw (ORCPT ); Tue, 8 Aug 2023 19:13:52 -0400 Received: from mail-oa1-x4a.google.com (mail-oa1-x4a.google.com [IPv6:2001:4860:4864:20::4a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4E4D61BFB for ; Tue, 8 Aug 2023 16:13:46 -0700 (PDT) Received: by mail-oa1-x4a.google.com with SMTP id 586e51a60fabf-1bb6b963b42so10619409fac.2 for ; Tue, 08 Aug 2023 16:13:46 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20221208; t=1691536425; x=1692141225; h=cc:to:from:subject:message-id:references:mime-version:in-reply-to :date:from:to:cc:subject:date:message-id:reply-to; bh=CwKTqZRHBF6wuN1C9cAW2HapO35gWwZnaXscRj6lwnc=; b=2WhdyxPqAZMQPm2b5LDRFghWynjBi1UCopSK1ma1kbSftgbyoXHvV4F9IDWxcU9bjD x/E9HP43OeHzZX28ncf+Kk6FnjBLF/r9fVsQhiqEHw1zjRX24sDt0GrY2/p3GalF1S2v N5lNsSn9Na5ATp2cklHDX8LTBtETR2s+9HHST3Ohuu7lmur160dOSvrfZ/KSaEE1NZwE MTqoVPht1r4GCjkIudPtbkdQsI5Nu98lnQML5VoXE8em5TrezcFzlkSPwtr/1nuEkMDe WUXQqHSd/d2erJlQAn4TX7ybCyK2/vQdT6g7QkZRS1d+VIMG2dqDkc81KuQJiZISQlHN UINA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1691536425; x=1692141225; 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=CwKTqZRHBF6wuN1C9cAW2HapO35gWwZnaXscRj6lwnc=; b=QrAPzZq/cDsG96qNr7a1Jn8hRjtGjiOE1/1n3SP16d0eSAG2XigMZlYoJ6c9NibhIN 1Seg7U9fbgiuTJzR8E6imoZ8/IOtD87G4QaL2A7flAAMnhr0f/OE/GsfgRgQvFLwszIE eSE6TaVRz63cBy5mACj4geEtdVqOBrLdJ1qaH7h5Q7JgnKqy3YFXJfTjaFyyfmPGGaS9 fbWoeZi65Nk35kR+IJANk49lI3m/pcS3t40jJztpSNMQZTxfSDWM3zuhBS7w7mtBfmTp a4MsCh7jOw1pXLaykQ95Zd5xg3wq17MRLlXa52S5vSaXHyMGP4rwDuoKpFnsmvz/cdc7 n+WQ== X-Gm-Message-State: AOJu0YwDsEboGJo+EAKaeq9B7c4FMDftShcntzRxL2KsAFEINXdKtisj 01oQ99aIn/uzIiA4g7KOtr7Mce+XUsrd X-Google-Smtp-Source: AGHT+IF6ugFOVb6y8tlgF6YsRwtDTq1sT4bykRxLroalTTYHrfBZlxunAEzdOs30Q1iqHJ3u3x2Z2p1PQHN7 X-Received: from rananta-linux.c.googlers.com ([fda3:e722:ac3:cc00:2b:ff92:c0a8:22b5]) (user=rananta job=sendgmr) by 2002:a05:6870:8c0f:b0:1bb:ad9e:2978 with SMTP id ec15-20020a0568708c0f00b001bbad9e2978mr334671oab.10.1691536425651; Tue, 08 Aug 2023 16:13:45 -0700 (PDT) Date: Tue, 8 Aug 2023 23:13:26 +0000 In-Reply-To: <20230808231330.3855936-1-rananta@google.com> Mime-Version: 1.0 References: <20230808231330.3855936-1-rananta@google.com> X-Mailer: git-send-email 2.41.0.640.ga95def55d0-goog Message-ID: <20230808231330.3855936-11-rananta@google.com> Subject: [PATCH v8 10/14] KVM: arm64: Define kvm_tlb_flush_vmid_range() 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 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org Implement the helper kvm_tlb_flush_vmid_range() that acts as a wrapper for range-based TLB invalidations. For the given VMID, use the range-based TLBI instructions to do the job or fallback to invalidating all the TLB entries. Signed-off-by: Raghavendra Rao Ananta Reviewed-by: Gavin Shan Reviewed-by: Shaoqin Huang --- arch/arm64/include/asm/kvm_pgtable.h | 10 ++++++++++ arch/arm64/kvm/hyp/pgtable.c | 20 ++++++++++++++++++++ 2 files changed, 30 insertions(+) diff --git a/arch/arm64/include/asm/kvm_pgtable.h b/arch/arm64/include/asm/kvm_pgtable.h index 8294a9a7e566d..5e8b1ff07854b 100644 --- a/arch/arm64/include/asm/kvm_pgtable.h +++ b/arch/arm64/include/asm/kvm_pgtable.h @@ -754,4 +754,14 @@ enum kvm_pgtable_prot kvm_pgtable_stage2_pte_prot(kvm_pte_t pte); * kvm_pgtable_prot format. */ enum kvm_pgtable_prot kvm_pgtable_hyp_pte_prot(kvm_pte_t pte); + +/** + * kvm_tlb_flush_vmid_range() - Invalidate/flush a range of TLB entries + * + * @mmu: Stage-2 KVM MMU struct + * @addr: The base Intermediate physical address from which to invalidate + * @size: Size of the range from the base to invalidate + */ +void kvm_tlb_flush_vmid_range(struct kvm_s2_mmu *mmu, + phys_addr_t addr, size_t size); #endif /* __ARM64_KVM_PGTABLE_H__ */ diff --git a/arch/arm64/kvm/hyp/pgtable.c b/arch/arm64/kvm/hyp/pgtable.c index aa740a974e024..5d14d5d5819a1 100644 --- a/arch/arm64/kvm/hyp/pgtable.c +++ b/arch/arm64/kvm/hyp/pgtable.c @@ -670,6 +670,26 @@ static bool stage2_has_fwb(struct kvm_pgtable *pgt) return !(pgt->flags & KVM_PGTABLE_S2_NOFWB); } +void kvm_tlb_flush_vmid_range(struct kvm_s2_mmu *mmu, + phys_addr_t addr, size_t size) +{ + unsigned long pages, inval_pages; + + if (!system_supports_tlb_range()) { + kvm_call_hyp(__kvm_tlb_flush_vmid, mmu); + return; + } + + pages = size >> PAGE_SHIFT; + while (pages > 0) { + inval_pages = min(pages, MAX_TLBI_RANGE_PAGES); + kvm_call_hyp(__kvm_tlb_flush_vmid_range, mmu, addr, inval_pages); + + addr += inval_pages << PAGE_SHIFT; + pages -= inval_pages; + } +} + #define KVM_S2_MEMATTR(pgt, attr) PAGE_S2_MEMATTR(attr, stage2_has_fwb(pgt)) static int stage2_set_prot_attr(struct kvm_pgtable *pgt, enum kvm_pgtable_prot prot,