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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E7853C43219 for ; Mon, 31 Jan 2022 11:46:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1350797AbiAaLqC (ORCPT ); Mon, 31 Jan 2022 06:46:02 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49904 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1380035AbiAaLav (ORCPT ); Mon, 31 Jan 2022 06:30:51 -0500 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 15842C0612F9; Mon, 31 Jan 2022 03:21:40 -0800 (PST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id A4F77B82A75; Mon, 31 Jan 2022 11:21:39 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E81F0C340EE; Mon, 31 Jan 2022 11:21:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1643628098; bh=2XoMdHyhCWacHgDF8xxYDHMPmrEmzbHUGPWlSLAPgFY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=05VaDO2nQMJzCOGBok9cRVWOUw2UV1OzEaGQM6vWT58OyPtho9yHtfc0giQqYeyG5 iS/Ir6gFhdGDL0PEjqEDueQbI58/lPoQy6UvQua00uKkGKPv1ybwmVtYIukxxxUrfb zcrkcz2vzVO/AbldKf5HnRate2UDHHbfWKcH/vB8= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Quentin Perret , Marc Zyngier , Sasha Levin Subject: [PATCH 5.16 123/200] KVM: arm64: pkvm: Use the mm_ops indirection for cache maintenance Date: Mon, 31 Jan 2022 11:56:26 +0100 Message-Id: <20220131105237.695829861@linuxfoundation.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220131105233.561926043@linuxfoundation.org> References: <20220131105233.561926043@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Marc Zyngier [ Upstream commit 094d00f8ca58c5d29b25e23b4daaed1ff1f13b41 ] CMOs issued from EL2 cannot directly use the kernel helpers, as EL2 doesn't have a mapping of the guest pages. Oops. Instead, use the mm_ops indirection to use helpers that will perform a mapping at EL2 and allow the CMO to be effective. Fixes: 25aa28691bb9 ("KVM: arm64: Move guest CMOs to the fault handlers") Reviewed-by: Quentin Perret Signed-off-by: Marc Zyngier Link: https://lore.kernel.org/r/20220114125038.1336965-1-maz@kernel.org Signed-off-by: Sasha Levin --- arch/arm64/kvm/hyp/pgtable.c | 18 ++++++------------ 1 file changed, 6 insertions(+), 12 deletions(-) diff --git a/arch/arm64/kvm/hyp/pgtable.c b/arch/arm64/kvm/hyp/pgtable.c index f8ceebe4982eb..4c77ff556f0ae 100644 --- a/arch/arm64/kvm/hyp/pgtable.c +++ b/arch/arm64/kvm/hyp/pgtable.c @@ -921,13 +921,9 @@ static int stage2_unmap_walker(u64 addr, u64 end, u32 level, kvm_pte_t *ptep, */ stage2_put_pte(ptep, mmu, addr, level, mm_ops); - if (need_flush) { - kvm_pte_t *pte_follow = kvm_pte_follow(pte, mm_ops); - - dcache_clean_inval_poc((unsigned long)pte_follow, - (unsigned long)pte_follow + - kvm_granule_size(level)); - } + if (need_flush && mm_ops->dcache_clean_inval_poc) + mm_ops->dcache_clean_inval_poc(kvm_pte_follow(pte, mm_ops), + kvm_granule_size(level)); if (childp) mm_ops->put_page(childp); @@ -1089,15 +1085,13 @@ static int stage2_flush_walker(u64 addr, u64 end, u32 level, kvm_pte_t *ptep, struct kvm_pgtable *pgt = arg; struct kvm_pgtable_mm_ops *mm_ops = pgt->mm_ops; kvm_pte_t pte = *ptep; - kvm_pte_t *pte_follow; if (!kvm_pte_valid(pte) || !stage2_pte_cacheable(pgt, pte)) return 0; - pte_follow = kvm_pte_follow(pte, mm_ops); - dcache_clean_inval_poc((unsigned long)pte_follow, - (unsigned long)pte_follow + - kvm_granule_size(level)); + if (mm_ops->dcache_clean_inval_poc) + mm_ops->dcache_clean_inval_poc(kvm_pte_follow(pte, mm_ops), + kvm_granule_size(level)); return 0; } -- 2.34.1