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 mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by smtp.lore.kernel.org (Postfix) with ESMTP id D1682C38A2B for ; Thu, 19 May 2022 13:46:18 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 842ED4B3D9; Thu, 19 May 2022 09:46:18 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Authentication-Results: mm01.cs.columbia.edu (amavisd-new); dkim=softfail (fail, message has been altered) header.i=@kernel.org Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id yWTIxCUz1aKW; Thu, 19 May 2022 09:46:17 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 6604F4B447; Thu, 19 May 2022 09:46:17 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 184654B3B8 for ; Thu, 19 May 2022 09:46:16 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id JgcVsKkSW1Ol for ; Thu, 19 May 2022 09:46:13 -0400 (EDT) Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id BF1BB4B44E for ; Thu, 19 May 2022 09:46:13 -0400 (EDT) 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 D1E38B824D9; Thu, 19 May 2022 13:46:12 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E5E8FC385B8; Thu, 19 May 2022 13:46:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1652967971; bh=gNfFOi6pd5y/KMC1EENc0l08zoMIj4rMl1P1lAcHzmI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=u6nFRAbTKYWiGRYq2O+qFR9S7ODm9TBeMw0yMLdLvLR/o74yXsoLWW4DrFBKaSsT1 0vsUeJ2J5x3lKmZDM3DzioeP03cx9RPsw4ayjkiazraeWQUPpTssdRZoZkAnQWplWJ IGrc6LSRZSXv6xum3n3ZBXvddcMIRhK6yXDbCbKEyRoCNwR5xwfMMYElYbbIiKW4DE aGwDDY8rDzdvBJ+hPY3BBZJq2fiIDkR1n0vaS7ObwSB1jFR3ViSsYmzo0ISSwIhX+w h96nvNClKHlT7x0CSd29JeyzM5Jai4cwvnVa7Zbc1hfw6O94eQP+YNvqmR0BHHfEC/ lCuQ55bVYcFsw== From: Will Deacon To: kvmarm@lists.cs.columbia.edu Subject: [PATCH 57/89] KVM: arm64: Trap debug break and watch from guest Date: Thu, 19 May 2022 14:41:32 +0100 Message-Id: <20220519134204.5379-58-will@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20220519134204.5379-1-will@kernel.org> References: <20220519134204.5379-1-will@kernel.org> MIME-Version: 1.0 Cc: Marc Zyngier , kernel-team@android.com, kvm@vger.kernel.org, Andy Lutomirski , linux-arm-kernel@lists.infradead.org, Michael Roth , Catalin Marinas , Chao Peng , Will Deacon X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu From: Fuad Tabba Debug and trace are not currently supported for protected guests, so trap accesses to the related registers and emulate them as RAZ/WI. Signed-off-by: Fuad Tabba --- arch/arm64/kvm/hyp/nvhe/pkvm.c | 2 +- arch/arm64/kvm/hyp/nvhe/sys_regs.c | 11 +++++++++++ 2 files changed, 12 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kvm/hyp/nvhe/pkvm.c b/arch/arm64/kvm/hyp/nvhe/pkvm.c index c0403416ce1d..cd0712e13ab0 100644 --- a/arch/arm64/kvm/hyp/nvhe/pkvm.c +++ b/arch/arm64/kvm/hyp/nvhe/pkvm.c @@ -108,7 +108,7 @@ static void pvm_init_traps_aa64dfr0(struct kvm_vcpu *vcpu) /* Trap Debug */ if (!FIELD_GET(ARM64_FEATURE_MASK(ID_AA64DFR0_DEBUGVER), feature_ids)) - mdcr_set |= MDCR_EL2_TDRA | MDCR_EL2_TDA | MDCR_EL2_TDE; + mdcr_set |= MDCR_EL2_TDRA | MDCR_EL2_TDA; /* Trap OS Double Lock */ if (!FIELD_GET(ARM64_FEATURE_MASK(ID_AA64DFR0_DOUBLELOCK), feature_ids)) diff --git a/arch/arm64/kvm/hyp/nvhe/sys_regs.c b/arch/arm64/kvm/hyp/nvhe/sys_regs.c index ddea42d7baf9..e732826f9624 100644 --- a/arch/arm64/kvm/hyp/nvhe/sys_regs.c +++ b/arch/arm64/kvm/hyp/nvhe/sys_regs.c @@ -356,6 +356,17 @@ static const struct sys_reg_desc pvm_sys_reg_descs[] = { /* Cache maintenance by set/way operations are restricted. */ /* Debug and Trace Registers are restricted. */ + RAZ_WI(SYS_DBGBVRn_EL1(0)), + RAZ_WI(SYS_DBGBCRn_EL1(0)), + RAZ_WI(SYS_DBGWVRn_EL1(0)), + RAZ_WI(SYS_DBGWCRn_EL1(0)), + RAZ_WI(SYS_MDSCR_EL1), + RAZ_WI(SYS_OSLAR_EL1), + RAZ_WI(SYS_OSLSR_EL1), + RAZ_WI(SYS_OSDLR_EL1), + + /* Group 1 ID registers */ + RAZ_WI(SYS_REVIDR_EL1), /* AArch64 mappings of the AArch32 ID registers */ /* CRm=1 */ -- 2.36.1.124.g0e6072fb45-goog _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm