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 26127C001B0 for ; Tue, 15 Aug 2023 18:47:46 +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:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=5G9HbydSqyKpf0AdWMhEpxoy5VH0yV/Xx+p0GG1T2b0=; b=H/wrC+zxpzN/st Cqo8iPEM4K3lItQIxaWM7o1x1j5f7sIjFv0ya+x83zz7IEurqqYLH+fKTk7ih5SZHaU5/5aLwiv8/ RWpS7SDgyIRWGq3kDB1h9KIUufq++wfZ6i2SPmLt1j3ZRcRQlpzsZWEc6oNEuaX/yxKS6MbN0apP7 EDF4HgdPB1AosX0t7utGe3NGbwm6ZHzDUsEkDXdm/cmN3GukOoCBJuWqqmalXYrJlbnA5LLbVSt5F EYJwSeUeLjtRWh1k7fwTNKYrJPuwY1xOzBCyzUJPozivDykCpZh4O68nh74zYPQLn513/IE3NDbd0 zvmkNfh83cP+WQkaZX2w==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qVz4d-002DGx-1Y; Tue, 15 Aug 2023 18:47:23 +0000 Received: from dfw.source.kernel.org ([2604:1380:4641:c500::1]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qVz4V-002DCW-2x for linux-arm-kernel@lists.infradead.org; Tue, 15 Aug 2023 18:47:17 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 7436A65F7C; Tue, 15 Aug 2023 18:47:15 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D485CC433C8; Tue, 15 Aug 2023 18:47:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1692125234; bh=Lefa0PQIq+vwhSa0X5V5we3jlWqXU+ytjLeGhSHxMHQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sN+lPJdHP70fwqxelCzuYKvDxdnG437p+ue73rSQ6v9ENk5056PDNrGAj22Bt2psh AhfHEeY7VyMV5hPi02sTXVlVQ6NHYVbizRt+W3pl8w6nNFVDTD6wednfbIFCzWNsDk VN+X/2vhgR6at0wACE7OyU+qXOZN4QVFgx4Bd7j78aiTHc7nTsFPCjL/naA/qGu1Ql EneAbI5h/2fc1xO7cq8ac5QOIQ4jcbI1084P84NmVVUDBmVn2B7pdqblRVzj49r2po 74goLuXuy2FflQEHZ0KS6CsC2DZh687SXTs+PD9Tnim/cJn6zrLkLqvzLbVCWEdoBv WYB2ekCpytEjw== Received: from sofa.misterjones.org ([185.219.108.64] helo=valley-girl.lan) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.95) (envelope-from ) id 1qVywq-0055Sd-3S; Tue, 15 Aug 2023 19:39:20 +0100 From: Marc Zyngier To: kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Catalin Marinas , Eric Auger , Mark Brown , Mark Rutland , Will Deacon , Alexandru Elisei , Andre Przywara , Chase Conklin , Ganapatrao Kulkarni , Darren Hart , Miguel Luis , Jing Zhang , James Morse , Suzuki K Poulose , Oliver Upton , Zenghui Yu Subject: [PATCH v4 18/28] KVM: arm64: nv: Add trap forwarding for CNTHCTL_EL2 Date: Tue, 15 Aug 2023 19:38:52 +0100 Message-Id: <20230815183903.2735724-19-maz@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230815183903.2735724-1-maz@kernel.org> References: <20230815183903.2735724-1-maz@kernel.org> MIME-Version: 1.0 X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: kvmarm@lists.linux.dev, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, catalin.marinas@arm.com, eric.auger@redhat.com, broonie@kernel.org, mark.rutland@arm.com, will@kernel.org, alexandru.elisei@arm.com, andre.przywara@arm.com, chase.conklin@arm.com, gankulkarni@os.amperecomputing.com, darren@os.amperecomputing.com, miguel.luis@oracle.com, jingzhangos@google.com, james.morse@arm.com, suzuki.poulose@arm.com, oliver.upton@linux.dev, yuzenghui@huawei.com X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230815_114716_041087_81163632 X-CRM114-Status: GOOD ( 16.99 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Describe the CNTHCTL_EL2 register, and associate it with all the sysregs it allows to trap. Reviewed-by: Eric Auger Signed-off-by: Marc Zyngier --- arch/arm64/kvm/emulate-nested.c | 50 ++++++++++++++++++++++++++++++++- 1 file changed, 49 insertions(+), 1 deletion(-) diff --git a/arch/arm64/kvm/emulate-nested.c b/arch/arm64/kvm/emulate-nested.c index 241e44eeed6d..860910386b5b 100644 --- a/arch/arm64/kvm/emulate-nested.c +++ b/arch/arm64/kvm/emulate-nested.c @@ -100,9 +100,11 @@ enum cgt_group_id { /* * Anything after this point requires a callback evaluating a - * complex trap condition. Hopefully we'll never need this... + * complex trap condition. Ugly stuff. */ __COMPLEX_CONDITIONS__, + CGT_CNTHCTL_EL1PCTEN = __COMPLEX_CONDITIONS__, + CGT_CNTHCTL_EL1PTEN, /* Must be last */ __NR_CGT_GROUP_IDS__ @@ -369,10 +371,51 @@ static const enum cgt_group_id *coarse_control_combo[] = { typedef enum trap_behaviour (*complex_condition_check)(struct kvm_vcpu *); +/* + * Warning, maximum confusion ahead. + * + * When E2H=0, CNTHCTL_EL2[1:0] are defined as EL1PCEN:EL1PCTEN + * When E2H=1, CNTHCTL_EL2[11:10] are defined as EL1PTEN:EL1PCTEN + * + * Note the single letter difference? Yet, the bits have the same + * function despite a different layout and a different name. + * + * We don't try to reconcile this mess. We just use the E2H=0 bits + * to generate something that is in the E2H=1 format, and live with + * it. You're welcome. + */ +static u64 get_sanitized_cnthctl(struct kvm_vcpu *vcpu) +{ + u64 val = __vcpu_sys_reg(vcpu, CNTHCTL_EL2); + + if (!vcpu_el2_e2h_is_set(vcpu)) + val = (val & (CNTHCTL_EL1PCEN | CNTHCTL_EL1PCTEN)) << 10; + + return val & ((CNTHCTL_EL1PCEN | CNTHCTL_EL1PCTEN) << 10); +} + +static enum trap_behaviour check_cnthctl_el1pcten(struct kvm_vcpu *vcpu) +{ + if (get_sanitized_cnthctl(vcpu) & (CNTHCTL_EL1PCTEN << 10)) + return BEHAVE_HANDLE_LOCALLY; + + return BEHAVE_FORWARD_ANY; +} + +static enum trap_behaviour check_cnthctl_el1pten(struct kvm_vcpu *vcpu) +{ + if (get_sanitized_cnthctl(vcpu) & (CNTHCTL_EL1PCEN << 10)) + return BEHAVE_HANDLE_LOCALLY; + + return BEHAVE_FORWARD_ANY; +} + #define CCC(id, fn) \ [id - __COMPLEX_CONDITIONS__] = fn static const complex_condition_check ccc[] = { + CCC(CGT_CNTHCTL_EL1PCTEN, check_cnthctl_el1pcten), + CCC(CGT_CNTHCTL_EL1PTEN, check_cnthctl_el1pten), }; /* @@ -877,6 +920,11 @@ static const struct encoding_to_trap_config encoding_to_cgt[] __initconst = { SR_TRAP(SYS_TRBPTR_EL1, CGT_MDCR_E2TB), SR_TRAP(SYS_TRBSR_EL1, CGT_MDCR_E2TB), SR_TRAP(SYS_TRBTRG_EL1, CGT_MDCR_E2TB), + SR_TRAP(SYS_CNTP_TVAL_EL0, CGT_CNTHCTL_EL1PTEN), + SR_TRAP(SYS_CNTP_CVAL_EL0, CGT_CNTHCTL_EL1PTEN), + SR_TRAP(SYS_CNTP_CTL_EL0, CGT_CNTHCTL_EL1PTEN), + SR_TRAP(SYS_CNTPCT_EL0, CGT_CNTHCTL_EL1PCTEN), + SR_TRAP(SYS_CNTPCTSS_EL0, CGT_CNTHCTL_EL1PCTEN), }; static DEFINE_XARRAY(sr_forward_xa); -- 2.34.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel