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 C3934C433EF for ; Mon, 29 Nov 2021 21:24:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231408AbhK2V1x (ORCPT ); Mon, 29 Nov 2021 16:27:53 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44636 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231160AbhK2VZu (ORCPT ); Mon, 29 Nov 2021 16:25:50 -0500 Received: from sin.source.kernel.org (sin.source.kernel.org [IPv6:2604:1380:40e1:4800::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 344C3C091D3E for ; Mon, 29 Nov 2021 12:07:57 -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 sin.source.kernel.org (Postfix) with ESMTPS id B46C7CE1409 for ; Mon, 29 Nov 2021 20:07:56 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 13300C53FCF; Mon, 29 Nov 2021 20:07:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1638216475; bh=Ph49KKBZ+O22t+hKyvWjXj2PVYxm0X5Rb2BvJLz8sHs=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=cJuSURiTc+KIGijIrvc2xeAEkXgjVpGvvvbLINxP40eqOBVXlF4Ch6hMy5WwDVVYn yzlspQBDDmIzIl15pgLxwo/DBLYn0MBl8yY4OTHnSLqg3yfaTXBFiF2iVtBN7YnTyU L6a5/6JDAzAXfPL24UDyZOPVnFaozbIUiF3DsT+GKlMJfZQ6aC4uzF/2o+wrPtL/G9 jWUP7dL9r2KyfrcNBIQZj0tD+LePoo0K752ktNfrSMyH7Z8/dIaj/LHl8FJQ6I/Nf2 dyxe6T+GhqX2yp6azjXKqbKfzbg4r4IQd2qskCHjQzHVy426kHTMazUwPD889pIFeK GoRxbBZrnSKIw== Received: from sofa.misterjones.org ([185.219.108.64] helo=why.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.94.2) (envelope-from ) id 1mrmqx-008gvR-U7; Mon, 29 Nov 2021 20:02:19 +0000 From: Marc Zyngier To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org Cc: Andre Przywara , Christoffer Dall , Jintack Lim , Haibo Xu , Ganapatrao Kulkarni , James Morse , Suzuki K Poulose , Alexandru Elisei , kernel-team@android.com Subject: [PATCH v5 33/69] KVM: arm64: nv: Forward debug traps to the nested guest Date: Mon, 29 Nov 2021 20:01:14 +0000 Message-Id: <20211129200150.351436-34-maz@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20211129200150.351436-1-maz@kernel.org> References: <20211129200150.351436-1-maz@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, andre.przywara@arm.com, christoffer.dall@arm.com, jintack@cs.columbia.edu, haibo.xu@linaro.org, gankulkarni@os.amperecomputing.com, james.morse@arm.com, suzuki.poulose@arm.com, alexandru.elisei@arm.com, kernel-team@android.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On handling a debug trap, check whether we need to forward it to the guest before handling it. Signed-off-by: Marc Zyngier --- arch/arm64/include/asm/kvm_nested.h | 2 ++ arch/arm64/kvm/emulate-nested.c | 9 +++++++-- arch/arm64/kvm/sys_regs.c | 3 +++ 3 files changed, 12 insertions(+), 2 deletions(-) diff --git a/arch/arm64/include/asm/kvm_nested.h b/arch/arm64/include/asm/kvm_nested.h index 26cba7b4d743..07c15f51cf86 100644 --- a/arch/arm64/include/asm/kvm_nested.h +++ b/arch/arm64/include/asm/kvm_nested.h @@ -62,6 +62,8 @@ static inline u64 translate_cnthctl_el2_to_cntkctl_el1(u64 cnthctl) } int handle_wfx_nested(struct kvm_vcpu *vcpu, bool is_wfe); +extern bool __forward_traps(struct kvm_vcpu *vcpu, unsigned int reg, + u64 control_bit); extern bool forward_traps(struct kvm_vcpu *vcpu, u64 control_bit); extern bool forward_nv_traps(struct kvm_vcpu *vcpu); diff --git a/arch/arm64/kvm/emulate-nested.c b/arch/arm64/kvm/emulate-nested.c index 8c7f2fe24bc6..5fbf8978acf2 100644 --- a/arch/arm64/kvm/emulate-nested.c +++ b/arch/arm64/kvm/emulate-nested.c @@ -25,14 +25,14 @@ #include "trace.h" -bool forward_traps(struct kvm_vcpu *vcpu, u64 control_bit) +bool __forward_traps(struct kvm_vcpu *vcpu, unsigned int reg, u64 control_bit) { bool control_bit_set; if (!nested_virt_in_use(vcpu)) return false; - control_bit_set = __vcpu_sys_reg(vcpu, HCR_EL2) & control_bit; + control_bit_set = __vcpu_sys_reg(vcpu, reg) & control_bit; if (!vcpu_mode_el2(vcpu) && control_bit_set) { kvm_inject_nested_sync(vcpu, kvm_vcpu_get_esr(vcpu)); return true; @@ -40,6 +40,11 @@ bool forward_traps(struct kvm_vcpu *vcpu, u64 control_bit) return false; } +bool forward_traps(struct kvm_vcpu *vcpu, u64 control_bit) +{ + return __forward_traps(vcpu, HCR_EL2, control_bit); +} + bool forward_nv_traps(struct kvm_vcpu *vcpu) { return forward_traps(vcpu, HCR_NV); diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 692cade54caf..9deedd5a058f 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -603,6 +603,9 @@ static bool trap_debug_regs(struct kvm_vcpu *vcpu, struct sys_reg_params *p, const struct sys_reg_desc *r) { + if (__forward_traps(vcpu, MDCR_EL2, MDCR_EL2_TDA | MDCR_EL2_TDE)) + return false; + access_rw(vcpu, p, r); if (p->is_write) vcpu->arch.flags |= KVM_ARM64_DEBUG_DIRTY; -- 2.30.2