From: Jean-Philippe Brucker <jean-philippe.brucker-5wv7dgnIgG8@public.gmane.org>
To: linux-arm-kernel-IAPFreCvJWM7uuMidbF8XUB+6BGkLq7r@public.gmane.org,
linux-pci-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
linux-acpi-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org,
kvm-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: mark.rutland-5wv7dgnIgG8@public.gmane.org,
ilias.apalodimas-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org,
catalin.marinas-5wv7dgnIgG8@public.gmane.org,
xuzaibo-hv44wF8Li93QT0dZR+AlfA@public.gmane.org,
will.deacon-5wv7dgnIgG8@public.gmane.org,
okaya-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org,
ashok.raj-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org,
bharatku-gjFFaj9aHVfQT0dZR+AlfA@public.gmane.org,
rfranz-YGCgFSpz5w/QT0dZR+AlfA@public.gmane.org,
lenb-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org,
bhelgaas-hpIqsD4AKlfQT0dZR+AlfA@public.gmane.org,
shunyong.yang-PT9Dzx9SjPiXmMXjJBpWqg@public.gmane.org,
dwmw2-wEGCiKHe2LqWVfeAwA7xHQ@public.gmane.org,
rjw-LthD3rsA81gm4RdzfppkhA@public.gmane.org,
sudeep.holla-5wv7dgnIgG8@public.gmane.org,
christian.koenig-5C7GfCeVMHo@public.gmane.org
Subject: [PATCH 24/37] iommu/arm-smmu-v3: Add SVA feature checking
Date: Mon, 12 Feb 2018 18:33:39 +0000 [thread overview]
Message-ID: <20180212183352.22730-25-jean-philippe.brucker@arm.com> (raw)
In-Reply-To: <20180212183352.22730-1-jean-philippe.brucker-5wv7dgnIgG8@public.gmane.org>
Aggregate all sanity-checks for sharing CPU page tables with the SMMU
under a single ARM_SMMU_FEAT_SVA bit. For PCIe SVA, users also need to
check FEAT_ATS and FEAT_PRI. For platform SVM, they will most likely have
to check FEAT_STALLS.
Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker-5wv7dgnIgG8@public.gmane.org>
---
drivers/iommu/arm-smmu-v3.c | 60 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 60 insertions(+)
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index 98690589156b..79bc5b5cceed 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -570,6 +570,7 @@ struct arm_smmu_device {
#define ARM_SMMU_FEAT_STALL_FORCE (1 << 13)
#define ARM_SMMU_FEAT_E2H (1 << 14)
#define ARM_SMMU_FEAT_BTM (1 << 15)
+#define ARM_SMMU_FEAT_SVA (1 << 16)
u32 features;
#define ARM_SMMU_OPT_SKIP_PREFETCH (1 << 0)
@@ -2619,6 +2620,62 @@ static int arm_smmu_device_reset(struct arm_smmu_device *smmu, bool bypass)
return 0;
}
+static bool arm_smmu_supports_sva(struct arm_smmu_device *smmu)
+{
+ unsigned long reg, fld;
+ unsigned long oas;
+ unsigned long asid_bits;
+
+ u32 feat_mask = ARM_SMMU_FEAT_BTM | ARM_SMMU_FEAT_COHERENCY;
+
+ if ((smmu->features & feat_mask) != feat_mask)
+ return false;
+
+ if (!(smmu->pgsize_bitmap & PAGE_SIZE))
+ return false;
+
+ /*
+ * Get the smallest PA size of all CPUs (sanitized by cpufeature). We're
+ * not even pretending to support AArch32 here.
+ */
+ reg = read_sanitised_ftr_reg(SYS_ID_AA64MMFR0_EL1);
+ fld = cpuid_feature_extract_unsigned_field(reg, ID_AA64MMFR0_PARANGE_SHIFT);
+ switch (fld) {
+ case 0x0:
+ oas = 32;
+ break;
+ case 0x1:
+ oas = 36;
+ break;
+ case 0x2:
+ oas = 40;
+ break;
+ case 0x3:
+ oas = 42;
+ break;
+ case 0x4:
+ oas = 44;
+ break;
+ case 0x5:
+ oas = 48;
+ break;
+ default:
+ return false;
+ }
+
+ /* abort if MMU outputs addresses greater than what we support. */
+ if (smmu->oas < oas)
+ return false;
+
+ /* We can support bigger ASIDs than the CPU, but not smaller */
+ fld = cpuid_feature_extract_unsigned_field(reg, ID_AA64MMFR0_ASID_SHIFT);
+ asid_bits = fld ? 16 : 8;
+ if (smmu->asid_bits < asid_bits)
+ return false;
+
+ return true;
+}
+
static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu)
{
u32 reg;
@@ -2813,6 +2870,9 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu)
smmu->ias = max(smmu->ias, smmu->oas);
+ if (arm_smmu_supports_sva(smmu))
+ smmu->features |= ARM_SMMU_FEAT_SVA;
+
dev_info(smmu->dev, "ias %lu-bit, oas %lu-bit (features 0x%08x)\n",
smmu->ias, smmu->oas, smmu->features);
return 0;
--
2.15.1
next prev parent reply other threads:[~2018-02-12 18:33 UTC|newest]
Thread overview: 106+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-12 18:33 [PATCH 00/37] Shared Virtual Addressing for the IOMMU Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 01/37] iommu: Introduce Shared Virtual Addressing API Jean-Philippe Brucker
[not found] ` <20180212183352.22730-2-jean-philippe.brucker-5wv7dgnIgG8@public.gmane.org>
2018-02-13 7:31 ` Tian, Kevin
[not found] ` <AADFC41AFE54684AB9EE6CBC0274A5D191002823-0J0gbvR4kThpB2pF5aRoyrfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2018-02-13 12:40 ` Jean-Philippe Brucker
2018-02-13 23:43 ` Tian, Kevin
[not found] ` <AADFC41AFE54684AB9EE6CBC0274A5D191003B1B-0J0gbvR4kThpB2pF5aRoyrfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2018-02-15 12:42 ` Jean-Philippe Brucker
[not found] ` <0b579768-3090-dd50-58b1-3385be92ef21-5wv7dgnIgG8@public.gmane.org>
2018-02-27 6:21 ` Tian, Kevin
[not found] ` <AADFC41AFE54684AB9EE6CBC0274A5D19101C8A7-0J0gbvR4kThpB2pF5aRoyrfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2018-02-28 16:20 ` Jean-Philippe Brucker
2018-02-15 9:59 ` Joerg Roedel
[not found] ` <20180215095909.r4nwqjhuijusssuy-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2018-02-15 12:43 ` Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 02/37] iommu/sva: Bind process address spaces to devices Jean-Philippe Brucker
2018-02-13 7:54 ` Tian, Kevin
2018-02-13 12:57 ` Jean-Philippe Brucker
2018-02-13 23:34 ` Tian, Kevin
[not found] ` <AADFC41AFE54684AB9EE6CBC0274A5D191003AD6-0J0gbvR4kThpB2pF5aRoyrfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2018-02-15 12:40 ` Jean-Philippe Brucker
[not found] ` <ca4d4992-0c8b-dae6-e443-7c7f7164be60-5wv7dgnIgG8@public.gmane.org>
2018-03-01 3:03 ` Liu, Yi L
[not found] ` <A2975661238FB949B60364EF0F2C257439B829DA-0J0gbvR4kTg/UvCtAeCM4rfspsVTdybXVpNB7YpNyf8@public.gmane.org>
2018-03-02 16:03 ` Jean-Philippe Brucker
[not found] ` <b9eacb30-817f-9027-bc0a-1f01cf9f13f9-5wv7dgnIgG8@public.gmane.org>
2018-02-15 10:21 ` joro-zLv9SwRftAIdnm+yROfE0A
[not found] ` <20180215102113.c7t7rrnyzgazmdli-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>
2018-02-15 12:29 ` Christian König
2018-02-15 12:46 ` Jean-Philippe Brucker
[not found] ` <20180212183352.22730-3-jean-philippe.brucker-5wv7dgnIgG8@public.gmane.org>
2018-02-28 20:34 ` Sinan Kaya
[not found] ` <bce32071-4159-3bdd-1e03-77f540ee4509-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2018-03-02 12:32 ` Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 05/37] iommu/sva: Track mm changes with an MMU notifier Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 06/37] iommu/sva: Search mm by PASID Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 07/37] iommu: Add a page fault handler Jean-Philippe Brucker
2018-02-14 7:18 ` Jacob Pan
2018-02-15 13:49 ` Jean-Philippe Brucker
[not found] ` <20180212183352.22730-8-jean-philippe.brucker-5wv7dgnIgG8@public.gmane.org>
2018-03-05 21:44 ` Sinan Kaya
[not found] ` <b2a3d2a7-7042-aef3-0def-05e64e39d046-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2018-03-06 10:24 ` Jean-Philippe Brucker
2018-03-05 21:53 ` Sinan Kaya
[not found] ` <77afa195-4842-a112-eba5-409b861b5315-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2018-03-06 10:46 ` Jean-Philippe Brucker
[not found] ` <430e9754-4cf7-0aa8-7899-fc13e6a2e079-5wv7dgnIgG8@public.gmane.org>
2018-03-06 12:52 ` okaya-sgV2jX0FEOL9JmXXK+q4OQ
2018-03-08 15:40 ` Jonathan Cameron
[not found] ` <20180308164035.000065c2-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2018-03-14 13:08 ` Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 08/37] iommu/fault: Handle mm faults Jean-Philippe Brucker
[not found] ` <20180212183352.22730-9-jean-philippe.brucker-5wv7dgnIgG8@public.gmane.org>
2018-02-14 18:46 ` Jacob Pan
2018-02-15 13:51 ` Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 09/37] iommu/fault: Let handler return a fault response Jean-Philippe Brucker
[not found] ` <20180212183352.22730-10-jean-philippe.brucker-5wv7dgnIgG8@public.gmane.org>
2018-02-20 23:19 ` Jacob Pan
2018-02-21 10:28 ` Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 11/37] dt-bindings: document stall and PASID properties for IOMMU masters Jean-Philippe Brucker
[not found] ` <20180212183352.22730-12-jean-philippe.brucker-5wv7dgnIgG8@public.gmane.org>
2018-02-19 2:51 ` Rob Herring
2018-02-20 11:28 ` Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 12/37] iommu/of: Add stall and pasid properties to iommu_fwspec Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 15/37] iommu/io-pgtable-arm: Factor out ARM LPAE register defines Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 18/37] iommu/arm-smmu-v3: Add support for Substream IDs Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 20/37] iommu/arm-smmu-v3: Share process page tables Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 23/37] iommu/arm-smmu-v3: Enable broadcast TLB maintenance Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 26/37] iommu/arm-smmu-v3: Add support for Hardware Translation Table Update Jean-Philippe Brucker
[not found] ` <20180212183352.22730-1-jean-philippe.brucker-5wv7dgnIgG8@public.gmane.org>
2018-02-12 18:33 ` [PATCH 03/37] iommu/sva: Manage process address spaces Jean-Philippe Brucker
[not found] ` <20180212183352.22730-4-jean-philippe.brucker-5wv7dgnIgG8@public.gmane.org>
2018-03-01 6:52 ` Lu Baolu
[not found] ` <5A97A324.9050605-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>
2018-03-01 8:04 ` Christian König
[not found] ` <cd4d7a98-e45e-7066-345f-52d8eef926a2-5C7GfCeVMHo@public.gmane.org>
2018-03-02 16:42 ` Jean-Philippe Brucker
2018-03-02 16:19 ` Jean-Philippe Brucker
2018-03-05 15:28 ` Sinan Kaya
[not found] ` <27a044ee-0ed7-0470-0fef-289d0d5cf5e8-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2018-03-06 10:37 ` Jean-Philippe Brucker
2018-04-24 1:32 ` Sinan Kaya
[not found] ` <57d77955-caa7-ddac-df7d-7eef1f05dbb2-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2018-04-24 9:33 ` Jean-Philippe Brucker
[not found] ` <66ec18ca-ea4e-d224-c9c5-8dbee5da8a72-5wv7dgnIgG8@public.gmane.org>
2018-04-24 17:17 ` Sinan Kaya
[not found] ` <e7c4053a-20cc-d2db-16da-100b1157eca4-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2018-04-24 18:52 ` Jean-Philippe Brucker via iommu
2018-04-10 18:53 ` Sinan Kaya
[not found] ` <04d4d161-ed72-f6b6-9b94-1d60bd79ef94-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2018-04-13 10:59 ` Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 04/37] iommu/sva: Add a mm_exit callback for device drivers Jean-Philippe Brucker
[not found] ` <20180212183352.22730-5-jean-philippe.brucker-5wv7dgnIgG8@public.gmane.org>
2018-02-13 8:11 ` Tian, Kevin
2018-02-13 12:57 ` Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 10/37] iommu/fault: Allow blocking fault handlers Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 13/37] arm64: mm: Pin down ASIDs for sharing mm with devices Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 14/37] iommu/arm-smmu-v3: Link domains and devices Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 16/37] iommu: Add generic PASID table library Jean-Philippe Brucker
[not found] ` <20180212183352.22730-17-jean-philippe.brucker-5wv7dgnIgG8@public.gmane.org>
2018-02-27 18:51 ` Jacob Pan
2018-02-28 16:22 ` Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 17/37] iommu/arm-smmu-v3: Move context descriptor code Jean-Philippe Brucker
[not found] ` <20180212183352.22730-18-jean-philippe.brucker-5wv7dgnIgG8@public.gmane.org>
2018-03-09 11:44 ` Jonathan Cameron
[not found] ` <20180309124445.00005e08-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2018-03-14 13:08 ` Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 19/37] iommu/arm-smmu-v3: Add second level of context descriptor table Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 21/37] iommu/arm-smmu-v3: Seize private ASID Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 22/37] iommu/arm-smmu-v3: Add support for VHE Jean-Philippe Brucker
2018-02-12 18:33 ` Jean-Philippe Brucker [this message]
2018-02-12 18:33 ` [PATCH 25/37] iommu/arm-smmu-v3: Implement mm operations Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 27/37] iommu/arm-smmu-v3: Register fault workqueue Jean-Philippe Brucker
[not found] ` <20180212183352.22730-28-jean-philippe.brucker-5wv7dgnIgG8@public.gmane.org>
2018-03-08 17:44 ` Jonathan Cameron
[not found] ` <20180308184454.00000b4e-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2018-03-14 13:08 ` Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 28/37] iommu/arm-smmu-v3: Maintain a SID->device structure Jean-Philippe Brucker
[not found] ` <20180212183352.22730-29-jean-philippe.brucker-5wv7dgnIgG8@public.gmane.org>
2018-03-08 17:34 ` Jonathan Cameron
[not found] ` <20180308183431.00005f86-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2018-03-14 13:09 ` Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 29/37] iommu/arm-smmu-v3: Add stall support for platform devices Jean-Philippe Brucker
2018-02-13 1:46 ` Xu Zaibo
[not found] ` <5A824359.1080005-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2018-02-13 12:58 ` Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 30/37] ACPI/IORT: Check ATS capability in root complex nodes Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 31/37] iommu/arm-smmu-v3: Add support for PCI ATS Jean-Philippe Brucker
[not found] ` <20180212183352.22730-32-jean-philippe.brucker-5wv7dgnIgG8@public.gmane.org>
2018-03-08 16:17 ` Jonathan Cameron
[not found] ` <20180308171725.0000763c-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2018-03-14 13:09 ` Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 32/37] iommu/arm-smmu-v3: Hook up ATC invalidation to mm ops Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 33/37] iommu/arm-smmu-v3: Disable tagged pointers Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 35/37] iommu/arm-smmu-v3: Add support for PRI Jean-Philippe Brucker
[not found] ` <20180212183352.22730-36-jean-philippe.brucker-5wv7dgnIgG8@public.gmane.org>
2018-03-05 12:29 ` Dongdong Liu
[not found] ` <6f55afcf-04b0-0dc4-6c75-064b70e6851c-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2018-03-05 13:09 ` Jean-Philippe Brucker
2018-03-08 16:24 ` Jonathan Cameron
[not found] ` <20180308172436.00006554-hv44wF8Li93QT0dZR+AlfA@public.gmane.org>
2018-03-14 13:10 ` Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 34/37] PCI: Make "PRG Response PASID Required" handling common Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 36/37] iommu/arm-smmu-v3: Add support for PCI PASID Jean-Philippe Brucker
2018-02-12 18:33 ` [PATCH 37/37] vfio: Add support for Shared Virtual Addressing Jean-Philippe Brucker
[not found] ` <20180212183352.22730-38-jean-philippe.brucker-5wv7dgnIgG8@public.gmane.org>
2018-02-16 19:33 ` Alex Williamson
[not found] ` <20180216123329.10f6dc23-DGNDKt5SQtizQB+pC5nmwQ@public.gmane.org>
2018-02-20 11:26 ` Jean-Philippe Brucker
2018-02-28 1:26 ` Sinan Kaya
[not found] ` <1e76c66c-952e-71bd-d831-d3a1ded9559c-sgV2jX0FEOL9JmXXK+q4OQ@public.gmane.org>
2018-02-28 16:25 ` Jean-Philippe Brucker
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