From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D41321755E for ; Mon, 5 Feb 2024 10:34:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707129291; cv=none; b=OwZ6lA6PFFestyAIbEeJfq6Y8/duev9QuWIwtcCGRkjAQuR4XpulTEO91898+ruGr3eUdS2jVsp/tz5vUaB4YmNdwEc0yHqwE7oPK+hJ1dGIC8C6hIbdBt50AgMLZT6peklAGmpnK/dbLeY/BX/nWyVVYCKoGLzc/Gijiva6v3c= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1707129291; c=relaxed/simple; bh=tpnzjbaBSixEtleIiKRUI9e9c3KhM2pJgrn2J+/zS94=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=Igl3OkWTWW+B9Zkm8BvxggfkiahcwsM968L0SYD0CHZ9cOGhTemeDxRBEkZg4aacVhjcMqvOZcgJXHyNf3hxwo9FXN6pOeeRGhAaY9H3izFOF33328GF45QjCSqUqCeFqreAsOi4wP0xrJNnJbds5tyarZbrF75SF5s6kvgixvc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=fQ+nTz82; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="fQ+nTz82" Received: by smtp.kernel.org (Postfix) with ESMTPSA id AA7ACC433B1; Mon, 5 Feb 2024 10:34:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1707129291; bh=tpnzjbaBSixEtleIiKRUI9e9c3KhM2pJgrn2J+/zS94=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=fQ+nTz82nImr1Q1pzOI75NyNYxwzqmWUffAVISZfDwzCgRtNHfwRxOneJ5AV445pX 0C8dfAjxy7L5J3LLOe7cIRskIxlXkbML/3V7JfnltZDqKe881cK5HR8YfSyHWG93QM M4itXYp+5y75fJHvU42efABW+aryi+HkqrfrZAOGmdXtKoZDiF37e5P2qKfOgn86PS kqd+HM8woSRL3vbCcOwzElD2aGI20BpqtPXEVGlpABp3me0F5QICeiZNtFZIdK+Y7u k0toBYGJ43A2EfProdsmpPV2tEN3AKuJAAwxoGa5MjnIp/ZpZXarB2K7wm2t1UGYWN NHsvWvVNym9Rg== 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 1rWwJN-000Nc3-Qw; Mon, 05 Feb 2024 10:34:49 +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 v3 24/26] KVM: arm64: Make FEAT_MOPS UNDEF if not advertised to the guest Date: Mon, 5 Feb 2024 10:34:29 +0000 Message-Id: <20240205103431.1104133-25-maz@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240205103431.1104133-1-maz@kernel.org> References: <20240205103431.1104133-1-maz@kernel.org> Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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 We unconditionally enable FEAT_MOPS, which is obviously wrong. So let's only do that when it is advertised to the guest. Which means we need to rely on a per-vcpu HCRX_EL2 shadow register. Signed-off-by: Marc Zyngier Reviewed-by: Joey Gouly --- arch/arm64/include/asm/kvm_arm.h | 4 +--- arch/arm64/include/asm/kvm_host.h | 1 + arch/arm64/kvm/hyp/include/hyp/switch.h | 2 +- arch/arm64/kvm/sys_regs.c | 7 +++++++ 4 files changed, 10 insertions(+), 4 deletions(-) diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h index 3c6f8ba1e479..a1769e415d72 100644 --- a/arch/arm64/include/asm/kvm_arm.h +++ b/arch/arm64/include/asm/kvm_arm.h @@ -102,9 +102,7 @@ #define HCR_HOST_NVHE_PROTECTED_FLAGS (HCR_HOST_NVHE_FLAGS | HCR_TSC) #define HCR_HOST_VHE_FLAGS (HCR_RW | HCR_TGE | HCR_E2H) -#define HCRX_GUEST_FLAGS \ - (HCRX_EL2_SMPME | HCRX_EL2_TCR2En | \ - (cpus_have_final_cap(ARM64_HAS_MOPS) ? (HCRX_EL2_MSCEn | HCRX_EL2_MCE2) : 0)) +#define HCRX_GUEST_FLAGS (HCRX_EL2_SMPME | HCRX_EL2_TCR2En) #define HCRX_HOST_FLAGS (HCRX_EL2_MSCEn | HCRX_EL2_TCR2En) /* TCR_EL2 Registers bits */ diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 968a997b3f02..3feabde9c926 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -584,6 +584,7 @@ struct kvm_vcpu_arch { /* Values of trap registers for the guest. */ u64 hcr_el2; + u64 hcrx_el2; u64 mdcr_el2; u64 cptr_el2; diff --git a/arch/arm64/kvm/hyp/include/hyp/switch.h b/arch/arm64/kvm/hyp/include/hyp/switch.h index 2d5891518006..e3fcf8c4d5b4 100644 --- a/arch/arm64/kvm/hyp/include/hyp/switch.h +++ b/arch/arm64/kvm/hyp/include/hyp/switch.h @@ -236,7 +236,7 @@ static inline void __activate_traps_common(struct kvm_vcpu *vcpu) write_sysreg(vcpu->arch.mdcr_el2, mdcr_el2); if (cpus_have_final_cap(ARM64_HAS_HCX)) { - u64 hcrx = HCRX_GUEST_FLAGS; + u64 hcrx = vcpu->arch.hcrx_el2; if (vcpu_has_nv(vcpu) && !is_hyp_ctxt(vcpu)) { u64 clr = 0, set = 0; diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 38ed47bd29db..2cb69efac1dc 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -3956,6 +3956,13 @@ void kvm_init_sysreg(struct kvm_vcpu *vcpu) if (!kvm_has_feat(kvm, ID_AA64ISAR0_EL1, TLB, OS)) vcpu->arch.hcr_el2 |= HCR_TTLBOS; + if (cpus_have_final_cap(ARM64_HAS_HCX)) { + vcpu->arch.hcrx_el2 = HCRX_GUEST_FLAGS; + + if (kvm_has_feat(kvm, ID_AA64ISAR2_EL1, MOPS, IMP)) + vcpu->arch.hcrx_el2 |= (HCRX_EL2_MSCEn | HCRX_EL2_MCE2); + } + if (test_bit(KVM_ARCH_FLAG_FGU_INITIALIZED, &kvm->arch.flags)) goto out; -- 2.39.2