From patchwork Wed Nov 6 15:45:57 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Yi Liu X-Patchwork-Id: 13865102 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.10]) (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 D1CBB20605D for ; Wed, 6 Nov 2024 15:46:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.10 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730907975; cv=none; b=msX1/euMBEpLfFtojC4hqgS9/ItaneMZMPHzProLsj+YoXDraGLr3vw9YrLv6SSq80IEjHL++bFQYYStq9iSpBpNOS4RBZk8ClVrzmVkvwoHYVjKtGbjV8IN7L8lOin4YA+UVyPM1MoA+9MxLc6oJf1BSoCcbIpl9b3igf6PenA= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1730907975; c=relaxed/simple; bh=0I9CVz13hnRK+5KlO77zaYQGiTadCRWLm+oL6A43ois=; h=From:To:Cc:Subject:Date:Message-Id:In-Reply-To:References: MIME-Version; b=VyfQk89BZlE2l3p+mUyGua/t/OHPavefPFjdPosUDe4deBGEPcPomIQ0ipyd0QiT+vVQ1m/G6sZFLhSampM9yyrhK26en+A4zDy/hF/HTipWqFdWH/6bOAb8d8drpexUiGPVfP0DuIXYcqqIILYM5IJjFJOPFj/ZmagSBshHv+c= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=VE9DXKfI; arc=none smtp.client-ip=198.175.65.10 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="VE9DXKfI" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1730907973; x=1762443973; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=0I9CVz13hnRK+5KlO77zaYQGiTadCRWLm+oL6A43ois=; b=VE9DXKfID+jmATgUm1Yjyn2ItaYs7Cp6LDPCbhN+73EqVtv0YGtmyhEl 8XOg2VqttgwQGPe1Oy2nah9y40k6+jaw5NjgYWyiviqaM98kdE6Nm/gcr WHq9Ybuipb0cj9kysOmdLgicpC6oqczoOEG5QMbOhu25+ul2NqimfYb1A eelL73cdXlyuIY+U+y+OqfMK67It8Pavw4bIH4/c5zx9dRlLCC9AapIPV Di/LYP18Uk7fL5iYvVvZxbSic241iJeSHtKGSn6A5abiTOxpW7T5R1PdS RVNxSWKL1AJgLQvLlCgnFWsY2O9ktVJRcqWAtl8+JJse0lTqD0I4yERo7 g==; X-CSE-ConnectionGUID: pvnTpp2xTTGOErjk+PkLRg== X-CSE-MsgGUID: Z6udxNZeRviu3qAD4668gA== X-IronPort-AV: E=McAfee;i="6700,10204,11222"; a="48174235" X-IronPort-AV: E=Sophos;i="6.11,199,1725346800"; d="scan'208";a="48174235" Received: from orviesa005.jf.intel.com ([10.64.159.145]) by orvoesa102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 06 Nov 2024 07:46:10 -0800 X-CSE-ConnectionGUID: uApo15SFSRql/7dKoutwuQ== X-CSE-MsgGUID: 6AnO8xfoTFaOTzwXtvx0ZA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,263,1725346800"; d="scan'208";a="89468203" Received: from 984fee00a4c6.jf.intel.com ([10.165.58.231]) by orviesa005.jf.intel.com with ESMTP; 06 Nov 2024 07:46:10 -0800 From: Yi Liu To: joro@8bytes.org, jgg@nvidia.com, kevin.tian@intel.com, baolu.lu@linux.intel.com Cc: alex.williamson@redhat.com, eric.auger@redhat.com, nicolinc@nvidia.com, kvm@vger.kernel.org, chao.p.peng@linux.intel.com, yi.l.liu@intel.com, iommu@lists.linux.dev, zhenzhong.duan@intel.com, vasant.hegde@amd.com, willy@infradead.org Subject: [PATCH v5 04/13] iommu/vt-d: Add pasid replace helpers Date: Wed, 6 Nov 2024 07:45:57 -0800 Message-Id: <20241106154606.9564-5-yi.l.liu@intel.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20241106154606.9564-1-yi.l.liu@intel.com> References: <20241106154606.9564-1-yi.l.liu@intel.com> Precedence: bulk X-Mailing-List: kvm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 pasid replacement allows converting a present pasid entry to be FS, SS, PT or nested, hence add helpers for such operations. Suggested-by: Lu Baolu Reviewed-by: Lu Baolu Reviewed-by: Kevin Tian Signed-off-by: Yi Liu --- drivers/iommu/intel/pasid.c | 182 ++++++++++++++++++++++++++++++++++++ drivers/iommu/intel/pasid.h | 15 +++ 2 files changed, 197 insertions(+) diff --git a/drivers/iommu/intel/pasid.c b/drivers/iommu/intel/pasid.c index 6841b9892d55..777e70b539b1 100644 --- a/drivers/iommu/intel/pasid.c +++ b/drivers/iommu/intel/pasid.c @@ -389,6 +389,48 @@ int intel_pasid_setup_first_level(struct intel_iommu *iommu, return 0; } +int intel_pasid_replace_first_level(struct intel_iommu *iommu, + struct device *dev, pgd_t *pgd, + u32 pasid, u16 did, u16 old_did, + int flags) +{ + struct pasid_entry *pte; + + if (!ecap_flts(iommu->ecap)) { + pr_err("No first level translation support on %s\n", + iommu->name); + return -EINVAL; + } + + if ((flags & PASID_FLAG_FL5LP) && !cap_fl5lp_support(iommu->cap)) { + pr_err("No 5-level paging support for first-level on %s\n", + iommu->name); + return -EINVAL; + } + + spin_lock(&iommu->lock); + pte = intel_pasid_get_entry(dev, pasid); + if (!pte) { + spin_unlock(&iommu->lock); + return -ENODEV; + } + + if (!pasid_pte_is_present(pte)) { + spin_unlock(&iommu->lock); + return -EINVAL; + } + + WARN_ON(old_did != pasid_get_domain_id(pte)); + + pasid_pte_config_first_level(iommu, pte, pgd, did, flags); + spin_unlock(&iommu->lock); + + intel_pasid_flush_present(iommu, dev, pasid, old_did, pte); + intel_iommu_drain_pasid_prq(dev, pasid); + + return 0; +} + /* * Set up the scalable mode pasid entry for second only translation type. */ @@ -456,6 +498,55 @@ int intel_pasid_setup_second_level(struct intel_iommu *iommu, return 0; } +int intel_pasid_replace_second_level(struct intel_iommu *iommu, + struct dmar_domain *domain, + struct device *dev, u16 old_did, + u32 pasid) +{ + struct pasid_entry *pte; + struct dma_pte *pgd; + u64 pgd_val; + int agaw; + u16 did; + + /* + * If hardware advertises no support for second level + * translation, return directly. + */ + if (!ecap_slts(iommu->ecap)) { + pr_err("No second level translation support on %s\n", + iommu->name); + return -EINVAL; + } + + pgd = domain->pgd; + pgd_val = virt_to_phys(pgd); + did = domain_id_iommu(domain, iommu); + + spin_lock(&iommu->lock); + pte = intel_pasid_get_entry(dev, pasid); + if (!pte) { + spin_unlock(&iommu->lock); + return -ENODEV; + } + + if (!pasid_pte_is_present(pte)) { + spin_unlock(&iommu->lock); + return -EINVAL; + } + + WARN_ON(old_did != pasid_get_domain_id(pte)); + + pasid_pte_config_second_level(iommu, pte, pgd_val, agaw, + did, domain->dirty_tracking); + spin_unlock(&iommu->lock); + + intel_pasid_flush_present(iommu, dev, pasid, old_did, pte); + intel_iommu_drain_pasid_prq(dev, pasid); + + return 0; +} + /* * Set up dirty tracking on a second only or nested translation type. */ @@ -568,6 +659,36 @@ int intel_pasid_setup_pass_through(struct intel_iommu *iommu, return 0; } +int intel_pasid_replace_pass_through(struct intel_iommu *iommu, + struct device *dev, u16 old_did, + u32 pasid) +{ + u16 did = FLPT_DEFAULT_DID; + struct pasid_entry *pte; + + spin_lock(&iommu->lock); + pte = intel_pasid_get_entry(dev, pasid); + if (!pte) { + spin_unlock(&iommu->lock); + return -ENODEV; + } + + if (!pasid_pte_is_present(pte)) { + spin_unlock(&iommu->lock); + return -EINVAL; + } + + WARN_ON(old_did != pasid_get_domain_id(pte)); + + pasid_pte_config_pass_through(iommu, pte, did); + spin_unlock(&iommu->lock); + + intel_pasid_flush_present(iommu, dev, pasid, old_did, pte); + intel_iommu_drain_pasid_prq(dev, pasid); + + return 0; +} + /* * Set the page snoop control for a pasid entry which has been set up. */ @@ -698,6 +819,67 @@ int intel_pasid_setup_nested(struct intel_iommu *iommu, struct device *dev, return 0; } +int intel_pasid_replace_nested(struct intel_iommu *iommu, + struct device *dev, u32 pasid, + u16 old_did, struct dmar_domain *domain) +{ + struct iommu_hwpt_vtd_s1 *s1_cfg = &domain->s1_cfg; + struct dmar_domain *s2_domain = domain->s2_domain; + u16 did = domain_id_iommu(domain, iommu); + struct pasid_entry *pte; + + /* Address width should match the address width supported by hardware */ + switch (s1_cfg->addr_width) { + case ADDR_WIDTH_4LEVEL: + break; + case ADDR_WIDTH_5LEVEL: + if (!cap_fl5lp_support(iommu->cap)) { + dev_err_ratelimited(dev, + "5-level paging not supported\n"); + return -EINVAL; + } + break; + default: + dev_err_ratelimited(dev, "Invalid stage-1 address width %d\n", + s1_cfg->addr_width); + return -EINVAL; + } + + if ((s1_cfg->flags & IOMMU_VTD_S1_SRE) && !ecap_srs(iommu->ecap)) { + pr_err_ratelimited("No supervisor request support on %s\n", + iommu->name); + return -EINVAL; + } + + if ((s1_cfg->flags & IOMMU_VTD_S1_EAFE) && !ecap_eafs(iommu->ecap)) { + pr_err_ratelimited("No extended access flag support on %s\n", + iommu->name); + return -EINVAL; + } + + spin_lock(&iommu->lock); + pte = intel_pasid_get_entry(dev, pasid); + if (!pte) { + spin_unlock(&iommu->lock); + return -ENODEV; + } + + if (!pasid_pte_is_present(pte)) { + spin_unlock(&iommu->lock); + return -EINVAL; + } + + WARN_ON(old_did != pasid_get_domain_id(pte)); + + pasid_pte_config_nestd(iommu, pte, s1_cfg, s2_domain, did); + spin_unlock(&iommu->lock); + + intel_pasid_flush_present(iommu, dev, pasid, old_did, pte); + intel_iommu_drain_pasid_prq(dev, pasid); + + return 0; +} + /* * Interfaces to setup or teardown a pasid table to the scalable-mode * context table entry: diff --git a/drivers/iommu/intel/pasid.h b/drivers/iommu/intel/pasid.h index dde6d3ba5ae0..06d1f7006d01 100644 --- a/drivers/iommu/intel/pasid.h +++ b/drivers/iommu/intel/pasid.h @@ -303,6 +303,21 @@ int intel_pasid_setup_pass_through(struct intel_iommu *iommu, struct device *dev, u32 pasid); int intel_pasid_setup_nested(struct intel_iommu *iommu, struct device *dev, u32 pasid, struct dmar_domain *domain); +int intel_pasid_replace_first_level(struct intel_iommu *iommu, + struct device *dev, pgd_t *pgd, + u32 pasid, u16 did, u16 old_did, + int flags); +int intel_pasid_replace_second_level(struct intel_iommu *iommu, + struct dmar_domain *domain, + struct device *dev, u16 old_did, + u32 pasid); +int intel_pasid_replace_pass_through(struct intel_iommu *iommu, + struct device *dev, u16 old_did, + u32 pasid); +int intel_pasid_replace_nested(struct intel_iommu *iommu, + struct device *dev, u32 pasid, + u16 old_did, struct dmar_domain *domain); + void intel_pasid_tear_down_entry(struct intel_iommu *iommu, struct device *dev, u32 pasid, bool fault_ignore);