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 3ADF441215 for ; Mon, 22 Jan 2024 20:19:01 +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=1705954741; cv=none; b=I7ppKpJ/bTG3FQl4nEBQ+zBe41hcabVNB46R5JgQRBiDvyYgl1gYJ6fTOVQmw2ul2nT5iIPtYf9sV4ixMyxR4uuUlR2k88VmyxuTZZ1AuZ1PuFNmdvSJQ4o1HK/lew/1Q4O6fEiFRv1vdq3YC7t0gzQI+HNMoLP25pXY5bRgbUE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1705954741; c=relaxed/simple; bh=9xodOIrwPgIrmH3P291Bg5W+UjSxYodosbTID2vRoyg=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=AyWHDSXwBAjXSE/uKQAxSyNsvQFec9rJIyfJMISABA3wlUBxc/HI7LnrAMNVKf2wDWjZtJbVUFX4mLc0pLZM0nEpsBKmPt0UgR7TUTs1eBVqzOl8e7yE01Ng34Osmd+KogfRN+pSAMxP8TJ5ruDMh4O7RSpGv//2D5cf/Y2+7sA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=d5j2/liC; 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="d5j2/liC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 12DBEC433B2; Mon, 22 Jan 2024 20:19:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1705954741; bh=9xodOIrwPgIrmH3P291Bg5W+UjSxYodosbTID2vRoyg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=d5j2/liCOUL9RwkTVYlMc0QoD1GxBKAwAwZkem81npKUDkNwSV2gbXM4oQNAuRVa2 IETcGpHqc1JMkqI/cEK8SPXHxyNElrQuvh4UADBXvlXt4APU7nWsGsYUopTA4H8oCg GRFTKFdvQ1JLfbVzBvys2QPiL7JT2v/9zgtLClupze8VzwkpBQbMV1Dz8ey6jrrbJg FZkBKkanCYuckDGFBOHH4shpGp2a7/bv8Q1xYmxe2YEP3En+TcFnJaCPBaY/wr7WSF A2u6v9lgVCIEFvGyoDiSyHZX6ZQzHvCZVF07LiIoFPP7otOVk8G8PFBIJslBrAX5EU IYl11/4ghzjrQ== 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 1rS0l1-00DjkQ-7z; Mon, 22 Jan 2024 20:18:59 +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 19/25] KVM: arm64: Move existing feature disabling over to FGU infrastructure Date: Mon, 22 Jan 2024 20:18:46 +0000 Message-Id: <20240122201852.262057-20-maz@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240122201852.262057-1-maz@kernel.org> References: <20240122201852.262057-1-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 already trap a bunch of existing features for the purpose of disabling them (MAIR2, POR, ACCDATA, SME...). Let's move them over to our brand new FGU infrastructure. Signed-off-by: Marc Zyngier --- arch/arm64/include/asm/kvm_host.h | 4 ++++ arch/arm64/kvm/arm.c | 6 ++++++ arch/arm64/kvm/hyp/include/hyp/switch.h | 17 +++-------------- arch/arm64/kvm/sys_regs.c | 23 +++++++++++++++++++++++ 4 files changed, 36 insertions(+), 14 deletions(-) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 4e0ac507ca01..fe5ed4bcded0 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -297,6 +297,8 @@ struct kvm_arch { #define KVM_ARCH_FLAG_TIMER_PPIS_IMMUTABLE 6 /* Initial ID reg values loaded */ #define KVM_ARCH_FLAG_ID_REGS_INITIALIZED 7 + /* Fine-Grained UNDEF initialised */ +#define KVM_ARCH_FLAG_FGU_INITIALIZED 8 unsigned long flags; /* VM-wide vCPU feature set */ @@ -1112,6 +1114,8 @@ int __init populate_nv_trap_config(void); bool lock_all_vcpus(struct kvm *kvm); void unlock_all_vcpus(struct kvm *kvm); +void kvm_init_sysreg(struct kvm_vcpu *); + /* MMIO helpers */ void kvm_mmio_write_buf(void *buf, unsigned int len, unsigned long data); unsigned long kvm_mmio_read_buf(const void *buf, unsigned int len); diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index c063e84fc72c..9f806c9b7d5d 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -675,6 +675,12 @@ int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu *vcpu) return ret; } + /* + * This needs to happen after NV has imposed its own restrictions on + * the feature set + */ + kvm_init_sysreg(vcpu); + ret = kvm_timer_enable(vcpu); if (ret) return ret; diff --git a/arch/arm64/kvm/hyp/include/hyp/switch.h b/arch/arm64/kvm/hyp/include/hyp/switch.h index a09149fd91ed..245f9c1ca666 100644 --- a/arch/arm64/kvm/hyp/include/hyp/switch.h +++ b/arch/arm64/kvm/hyp/include/hyp/switch.h @@ -157,7 +157,7 @@ static inline void __activate_traps_hfgxtr(struct kvm_vcpu *vcpu) { struct kvm_cpu_context *hctxt = &this_cpu_ptr(&kvm_host_data)->host_ctxt; struct kvm *kvm = kern_hyp_va(vcpu->kvm); - u64 r_clr = 0, w_clr = 0, r_set = 0, w_set = 0, tmp; + u64 r_clr = 0, w_clr = 0, r_set = 0, w_set = 0; u64 r_val, w_val; CHECK_FGT_MASKS(HFGRTR_EL2); @@ -174,13 +174,6 @@ static inline void __activate_traps_hfgxtr(struct kvm_vcpu *vcpu) ctxt_sys_reg(hctxt, HFGRTR_EL2) = read_sysreg_s(SYS_HFGRTR_EL2); ctxt_sys_reg(hctxt, HFGWTR_EL2) = read_sysreg_s(SYS_HFGWTR_EL2); - if (cpus_have_final_cap(ARM64_SME)) { - tmp = HFGxTR_EL2_nSMPRI_EL1_MASK | HFGxTR_EL2_nTPIDR2_EL0_MASK; - - r_clr |= tmp; - w_clr |= tmp; - } - /* * Trap guest writes to TCR_EL1 to prevent it from enabling HA or HD. */ @@ -195,15 +188,11 @@ static inline void __activate_traps_hfgxtr(struct kvm_vcpu *vcpu) compute_undef_clr_set(vcpu, kvm, HFGRTR_EL2, r_clr, r_set); compute_undef_clr_set(vcpu, kvm, HFGWTR_EL2, w_clr, w_set); - /* The default to trap everything not handled or supported in KVM. */ - tmp = HFGxTR_EL2_nAMAIR2_EL1 | HFGxTR_EL2_nMAIR2_EL1 | HFGxTR_EL2_nS2POR_EL1 | - HFGxTR_EL2_nPOR_EL1 | HFGxTR_EL2_nPOR_EL0 | HFGxTR_EL2_nACCDATA_EL1; - - r_val = __HFGRTR_EL2_nMASK & ~tmp; + r_val = __HFGRTR_EL2_nMASK; r_val |= r_set; r_val &= ~r_clr; - w_val = __HFGWTR_EL2_nMASK & ~tmp; + w_val = __HFGWTR_EL2_nMASK; w_val |= w_set; w_val &= ~w_clr; diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index c48bc2577162..a62efd8a2959 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -3943,6 +3943,29 @@ int kvm_vm_ioctl_get_reg_writable_masks(struct kvm *kvm, struct reg_mask_range * return 0; } +void kvm_init_sysreg(struct kvm_vcpu *vcpu) +{ + struct kvm *kvm = vcpu->kvm; + + mutex_lock(&kvm->arch.config_lock); + + if (test_bit(KVM_ARCH_FLAG_FGU_INITIALIZED, &kvm->arch.flags)) + goto out; + + kvm->arch.fgu[HFGxTR_GROUP] = (HFGxTR_EL2_nAMAIR2_EL1 | + HFGxTR_EL2_nMAIR2_EL1 | + HFGxTR_EL2_nS2POR_EL1 | + HFGxTR_EL2_nPOR_EL1 | + HFGxTR_EL2_nPOR_EL0 | + HFGxTR_EL2_nACCDATA_EL1 | + HFGxTR_EL2_nSMPRI_EL1_MASK | + HFGxTR_EL2_nTPIDR2_EL0_MASK); + + set_bit(KVM_ARCH_FLAG_FGU_INITIALIZED, &kvm->arch.flags); +out: + mutex_unlock(&kvm->arch.config_lock); +} + int __init kvm_sys_reg_table_init(void) { struct sys_reg_params params; 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Mon, 22 Jan 2024 20:18:59 +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 19/25] KVM: arm64: Move existing feature disabling over to FGU infrastructure Date: Mon, 22 Jan 2024 20:18:46 +0000 Message-Id: <20240122201852.262057-20-maz@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240122201852.262057-1-maz@kernel.org> References: <20240122201852.262057-1-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-20240122_201949_122781_D08E62A4 X-CRM114-Status: GOOD ( 16.94 ) 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 We already trap a bunch of existing features for the purpose of disabling them (MAIR2, POR, ACCDATA, SME...). Let's move them over to our brand new FGU infrastructure. Signed-off-by: Marc Zyngier --- arch/arm64/include/asm/kvm_host.h | 4 ++++ arch/arm64/kvm/arm.c | 6 ++++++ arch/arm64/kvm/hyp/include/hyp/switch.h | 17 +++-------------- arch/arm64/kvm/sys_regs.c | 23 +++++++++++++++++++++++ 4 files changed, 36 insertions(+), 14 deletions(-) diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 4e0ac507ca01..fe5ed4bcded0 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -297,6 +297,8 @@ struct kvm_arch { #define KVM_ARCH_FLAG_TIMER_PPIS_IMMUTABLE 6 /* Initial ID reg values loaded */ #define KVM_ARCH_FLAG_ID_REGS_INITIALIZED 7 + /* Fine-Grained UNDEF initialised */ +#define KVM_ARCH_FLAG_FGU_INITIALIZED 8 unsigned long flags; /* VM-wide vCPU feature set */ @@ -1112,6 +1114,8 @@ int __init populate_nv_trap_config(void); bool lock_all_vcpus(struct kvm *kvm); void unlock_all_vcpus(struct kvm *kvm); +void kvm_init_sysreg(struct kvm_vcpu *); + /* MMIO helpers */ void kvm_mmio_write_buf(void *buf, unsigned int len, unsigned long data); unsigned long kvm_mmio_read_buf(const void *buf, unsigned int len); diff --git a/arch/arm64/kvm/arm.c b/arch/arm64/kvm/arm.c index c063e84fc72c..9f806c9b7d5d 100644 --- a/arch/arm64/kvm/arm.c +++ b/arch/arm64/kvm/arm.c @@ -675,6 +675,12 @@ int kvm_arch_vcpu_run_pid_change(struct kvm_vcpu *vcpu) return ret; } + /* + * This needs to happen after NV has imposed its own restrictions on + * the feature set + */ + kvm_init_sysreg(vcpu); + ret = kvm_timer_enable(vcpu); if (ret) return ret; diff --git a/arch/arm64/kvm/hyp/include/hyp/switch.h b/arch/arm64/kvm/hyp/include/hyp/switch.h index a09149fd91ed..245f9c1ca666 100644 --- a/arch/arm64/kvm/hyp/include/hyp/switch.h +++ b/arch/arm64/kvm/hyp/include/hyp/switch.h @@ -157,7 +157,7 @@ static inline void __activate_traps_hfgxtr(struct kvm_vcpu *vcpu) { struct kvm_cpu_context *hctxt = &this_cpu_ptr(&kvm_host_data)->host_ctxt; struct kvm *kvm = kern_hyp_va(vcpu->kvm); - u64 r_clr = 0, w_clr = 0, r_set = 0, w_set = 0, tmp; + u64 r_clr = 0, w_clr = 0, r_set = 0, w_set = 0; u64 r_val, w_val; CHECK_FGT_MASKS(HFGRTR_EL2); @@ -174,13 +174,6 @@ static inline void __activate_traps_hfgxtr(struct kvm_vcpu *vcpu) ctxt_sys_reg(hctxt, HFGRTR_EL2) = read_sysreg_s(SYS_HFGRTR_EL2); ctxt_sys_reg(hctxt, HFGWTR_EL2) = read_sysreg_s(SYS_HFGWTR_EL2); - if (cpus_have_final_cap(ARM64_SME)) { - tmp = HFGxTR_EL2_nSMPRI_EL1_MASK | HFGxTR_EL2_nTPIDR2_EL0_MASK; - - r_clr |= tmp; - w_clr |= tmp; - } - /* * Trap guest writes to TCR_EL1 to prevent it from enabling HA or HD. */ @@ -195,15 +188,11 @@ static inline void __activate_traps_hfgxtr(struct kvm_vcpu *vcpu) compute_undef_clr_set(vcpu, kvm, HFGRTR_EL2, r_clr, r_set); compute_undef_clr_set(vcpu, kvm, HFGWTR_EL2, w_clr, w_set); - /* The default to trap everything not handled or supported in KVM. */ - tmp = HFGxTR_EL2_nAMAIR2_EL1 | HFGxTR_EL2_nMAIR2_EL1 | HFGxTR_EL2_nS2POR_EL1 | - HFGxTR_EL2_nPOR_EL1 | HFGxTR_EL2_nPOR_EL0 | HFGxTR_EL2_nACCDATA_EL1; - - r_val = __HFGRTR_EL2_nMASK & ~tmp; + r_val = __HFGRTR_EL2_nMASK; r_val |= r_set; r_val &= ~r_clr; - w_val = __HFGWTR_EL2_nMASK & ~tmp; + w_val = __HFGWTR_EL2_nMASK; w_val |= w_set; w_val &= ~w_clr; diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index c48bc2577162..a62efd8a2959 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -3943,6 +3943,29 @@ int kvm_vm_ioctl_get_reg_writable_masks(struct kvm *kvm, struct reg_mask_range * return 0; } +void kvm_init_sysreg(struct kvm_vcpu *vcpu) +{ + struct kvm *kvm = vcpu->kvm; + + mutex_lock(&kvm->arch.config_lock); + + if (test_bit(KVM_ARCH_FLAG_FGU_INITIALIZED, &kvm->arch.flags)) + goto out; + + kvm->arch.fgu[HFGxTR_GROUP] = (HFGxTR_EL2_nAMAIR2_EL1 | + HFGxTR_EL2_nMAIR2_EL1 | + HFGxTR_EL2_nS2POR_EL1 | + HFGxTR_EL2_nPOR_EL1 | + HFGxTR_EL2_nPOR_EL0 | + HFGxTR_EL2_nACCDATA_EL1 | + HFGxTR_EL2_nSMPRI_EL1_MASK | + HFGxTR_EL2_nTPIDR2_EL0_MASK); + + set_bit(KVM_ARCH_FLAG_FGU_INITIALIZED, &kvm->arch.flags); +out: + mutex_unlock(&kvm->arch.config_lock); +} + int __init kvm_sys_reg_table_init(void) { struct sys_reg_params params; -- 2.39.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel