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 D2AC8C48BC3 for ; Wed, 14 Feb 2024 13:20:31 +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=oAi3ZwX7/W5F+5t8jffQ05eqvRwo2YMS2oQc3J4daug=; b=3b2MHQKgc+OBWB yc7bjE8nRCMS5LkzJwErSH/pEP9el0js7lhX6dYlpBGcx433Em0TBoYgR7Z3fyhlFDwoyjOiQv/66 iU5mL1SeYnuGaMfsK/jJveR30lmXDS1eNBUx1lfuk9P0fxyU2EedOXZj2nLs+ZIMTLieF2QRO2y33 Dh3+Aa/WISS2HFrxPQX/1IxWA/GC+o1CJSTVjXMAAxb2keuADnCuT1Pd/XUm2g27/gbXJu3IPcaRL kpQTMZIF9PKb9UoTmOG/ykUYqB+Cfypq0uWZb+VIWZsTT4dQDhQJpmpTFCOKeR5vT0tyvJEMtU/Ef iTMk5l34gqmz7UWad+XA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1raFBQ-0000000CzAH-2AbK; Wed, 14 Feb 2024 13:20:16 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1raF9r-0000000CxlO-0naz for linux-arm-kernel@lists.infradead.org; Wed, 14 Feb 2024 13:18:45 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id AD1B66195A; Wed, 14 Feb 2024 13:18:37 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 1C76EC43390; Wed, 14 Feb 2024 13:18:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1707916717; bh=MSK9uIvhVI7ocNChg+YpHLbRXohZWodSIZ69qXfzdQk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=iqwsU2i+eNV6hze7WuuO6V5W/Qs68J0esnKXibjH+MalVhUxat5eTSIFXQxNw+trB CZwfpsPPltXXFmX3EgsuIFdswHilxaRRKkh1BoDBOGrhXyJ3CF4ZQFeIgeUloh7+ib zCb5dDZGKwya2kHAHt90eaZM6+jkcNlPQmTa390PksBIHCOFH+Gk9F7I56Pa8t8tZM sqRjfzTr7coFkxkKulcFR5tvcVqJS9z3mgUIZ8Ncfdx4JPOhrNbN0LpZ9aMsmExirp j/n+oaTJaSqf3NZAoqHhWh+TMLQUe7hSb04WOKv/tYlJc3bJ/EaWGjQoEHtDA6+P3p jsLdkS1hQCoew== 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 1raF9n-00394l-7b; Wed, 14 Feb 2024 13:18:35 +0000 From: Marc Zyngier To: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org Cc: James Morse , Suzuki K Poulose , Oliver Upton , Zenghui Yu , Catalin Marinas , Will Deacon , Joey Gouly , Mark Brown Subject: [PATCH v4 22/26] KVM: arm64: Make PIR{,E0}_EL1 UNDEF if S1PIE is not advertised to the guest Date: Wed, 14 Feb 2024 13:18:23 +0000 Message-Id: <20240214131827.2856277-23-maz@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240214131827.2856277-1-maz@kernel.org> References: <20240214131827.2856277-1-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, linux-arm-kernel@lists.infradead.org, james.morse@arm.com, suzuki.poulose@arm.com, oliver.upton@linux.dev, yuzenghui@huawei.com, catalin.marinas@arm.com, will@kernel.org, joey.gouly@arm.com, broonie@kernel.org 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-20240214_051839_564438_9433CEDD X-CRM114-Status: GOOD ( 13.78 ) 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 As part of the ongoing effort to honor the guest configuration, add the necessary checks to make PIR_EL1 and co UNDEF if not advertised to the guest, and avoid context switching them. Signed-off-by: Marc Zyngier Reviewed-by: Joey Gouly --- arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h | 24 +++++++++++++++++++--- arch/arm64/kvm/sys_regs.c | 4 ++++ 2 files changed, 25 insertions(+), 3 deletions(-) diff --git a/arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h b/arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h index bb6b571ec627..4be6a7fa0070 100644 --- a/arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h +++ b/arch/arm64/kvm/hyp/include/hyp/sysreg-sr.h @@ -27,16 +27,34 @@ static inline void __sysreg_save_user_state(struct kvm_cpu_context *ctxt) ctxt_sys_reg(ctxt, TPIDRRO_EL0) = read_sysreg(tpidrro_el0); } -static inline bool ctxt_has_mte(struct kvm_cpu_context *ctxt) +static inline struct kvm_vcpu *ctxt_to_vcpu(struct kvm_cpu_context *ctxt) { struct kvm_vcpu *vcpu = ctxt->__hyp_running_vcpu; if (!vcpu) vcpu = container_of(ctxt, struct kvm_vcpu, arch.ctxt); + return vcpu; +} + +static inline bool ctxt_has_mte(struct kvm_cpu_context *ctxt) +{ + struct kvm_vcpu *vcpu = ctxt_to_vcpu(ctxt); + return kvm_has_mte(kern_hyp_va(vcpu->kvm)); } +static inline bool ctxt_has_s1pie(struct kvm_cpu_context *ctxt) +{ + struct kvm_vcpu *vcpu; + + if (!cpus_have_final_cap(ARM64_HAS_S1PIE)) + return false; + + vcpu = ctxt_to_vcpu(ctxt); + return kvm_has_feat(kern_hyp_va(vcpu->kvm), ID_AA64MMFR3_EL1, S1PIE, IMP); +} + static inline void __sysreg_save_el1_state(struct kvm_cpu_context *ctxt) { ctxt_sys_reg(ctxt, SCTLR_EL1) = read_sysreg_el1(SYS_SCTLR); @@ -55,7 +73,7 @@ static inline void __sysreg_save_el1_state(struct kvm_cpu_context *ctxt) ctxt_sys_reg(ctxt, CONTEXTIDR_EL1) = read_sysreg_el1(SYS_CONTEXTIDR); ctxt_sys_reg(ctxt, AMAIR_EL1) = read_sysreg_el1(SYS_AMAIR); ctxt_sys_reg(ctxt, CNTKCTL_EL1) = read_sysreg_el1(SYS_CNTKCTL); - if (cpus_have_final_cap(ARM64_HAS_S1PIE)) { + if (ctxt_has_s1pie(ctxt)) { ctxt_sys_reg(ctxt, PIR_EL1) = read_sysreg_el1(SYS_PIR); ctxt_sys_reg(ctxt, PIRE0_EL1) = read_sysreg_el1(SYS_PIRE0); } @@ -131,7 +149,7 @@ static inline void __sysreg_restore_el1_state(struct kvm_cpu_context *ctxt) write_sysreg_el1(ctxt_sys_reg(ctxt, CONTEXTIDR_EL1), SYS_CONTEXTIDR); write_sysreg_el1(ctxt_sys_reg(ctxt, AMAIR_EL1), SYS_AMAIR); write_sysreg_el1(ctxt_sys_reg(ctxt, CNTKCTL_EL1), SYS_CNTKCTL); - if (cpus_have_final_cap(ARM64_HAS_S1PIE)) { + if (ctxt_has_s1pie(ctxt)) { write_sysreg_el1(ctxt_sys_reg(ctxt, PIR_EL1), SYS_PIR); write_sysreg_el1(ctxt_sys_reg(ctxt, PIRE0_EL1), SYS_PIRE0); } diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index f07ee7c89822..da9db99c77e7 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -3994,6 +3994,10 @@ void kvm_init_sysreg(struct kvm_vcpu *vcpu) HFGITR_EL2_TLBIRVAAE1OS | HFGITR_EL2_TLBIRVAE1OS); + if (!kvm_has_feat(kvm, ID_AA64MMFR3_EL1, S1PIE, IMP)) + kvm->arch.fgu[HFGxTR_GROUP] |= (HFGxTR_EL2_nPIRE0_EL1 | + HFGxTR_EL2_nPIR_EL1); + set_bit(KVM_ARCH_FLAG_FGU_INITIALIZED, &kvm->arch.flags); out: mutex_unlock(&kvm->arch.config_lock); -- 2.39.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel