From: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>,
Shanker Donthineni <shankerd@qti.qualcomm.com>,
kvm@vger.kernel.org, Catalin Marinas <catalin.marinas@arm.com>,
Joerg Roedel <joro@8bytes.org>,
Sinan Kaya <okaya@qti.qualcomm.com>,
Will Deacon <will.deacon@arm.com>,
iommu@lists.linux-foundation.org,
Harv Abdulhamid <harba@qti.qualcomm.com>,
Alex Williamson <alex.williamson@redhat.com>,
linux-pci@vger.kernel.org, Bjorn Helgaas <bhelgaas@google.com>,
Robin Murphy <robin.murphy@arm.com>,
David Woodhouse <dwmw2@infradead.org>,
linux-arm-kernel@lists.infradead.org,
Nate Watterson <nwatters@qti.qualcomm.com>
Subject: [RFC PATCH 17/30] iommu/arm-smmu-v3: Add SVM feature checking
Date: Mon, 27 Feb 2017 19:54:28 +0000 [thread overview]
Message-ID: <20170227195441.5170-18-jean-philippe.brucker@arm.com> (raw)
In-Reply-To: <20170227195441.5170-1-jean-philippe.brucker@arm.com>
Aggregate all sanity-checks for SVM under a single ARM_SMMU_FEAT_SVM bit.
For PCIe SVM, users also need to check FEAT_ATS and FEAT_PRI. For platform
SVM, they will most likely have to check ARM_SMMU_FEAT_STALLS.
Signed-off-by: Jean-Philippe Brucker <jean-philippe.brucker@arm.com>
---
drivers/iommu/arm-smmu-v3.c | 63 +++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 63 insertions(+)
diff --git a/drivers/iommu/arm-smmu-v3.c b/drivers/iommu/arm-smmu-v3.c
index 86d5430bd68d..499dc1cd07eb 100644
--- a/drivers/iommu/arm-smmu-v3.c
+++ b/drivers/iommu/arm-smmu-v3.c
@@ -674,6 +674,7 @@ struct arm_smmu_device {
#define ARM_SMMU_FEAT_HYP (1 << 12)
#define ARM_SMMU_FEAT_E2H (1 << 13)
#define ARM_SMMU_FEAT_BTM (1 << 14)
+#define ARM_SMMU_FEAT_SVM (1 << 15)
u32 features;
#define ARM_SMMU_OPT_SKIP_PREFETCH (1 << 0)
@@ -3744,6 +3745,65 @@ static int arm_smmu_device_reset(struct arm_smmu_device *smmu, bool bypass)
return 0;
}
+static bool arm_smmu_supports_svm(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->ssid_bits)
+ 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_system_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;
@@ -3937,6 +3997,9 @@ static int arm_smmu_device_hw_probe(struct arm_smmu_device *smmu)
smmu->ias = max(smmu->ias, smmu->oas);
+ if (arm_smmu_supports_svm(smmu))
+ smmu->features |= ARM_SMMU_FEAT_SVM;
+
dev_info(smmu->dev, "ias %lu-bit, oas %lu-bit (features 0x%08x)\n",
smmu->ias, smmu->oas, smmu->features);
return 0;
--
2.11.0
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next prev parent reply other threads:[~2017-02-27 19:54 UTC|newest]
Thread overview: 103+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-02-27 19:54 [RFC PATCH 00/30] Add PCIe SVM support to ARM SMMUv3 Jean-Philippe Brucker
2017-02-27 19:54 ` [RFC PATCH 01/30] iommu/arm-smmu-v3: Link groups and devices Jean-Philippe Brucker
2017-03-27 12:18 ` Robin Murphy
2017-04-10 11:02 ` Jean-Philippe Brucker
2017-02-27 19:54 ` [RFC PATCH 02/30] iommu/arm-smmu-v3: Link groups and domains Jean-Philippe Brucker
2017-02-27 19:54 ` [RFC PATCH 03/30] PCI: Move ATS declarations outside of CONFIG_PCI Jean-Philippe Brucker
2017-03-03 21:09 ` Bjorn Helgaas
2017-03-06 11:29 ` Jean-Philippe Brucker
2017-02-27 19:54 ` [RFC PATCH 04/30] iommu/arm-smmu-v3: Add support for PCI ATS Jean-Philippe Brucker
2017-03-01 19:24 ` Sinan Kaya
2017-03-02 10:51 ` Jean-Philippe Brucker
2017-03-02 13:11 ` okaya
2017-03-08 15:26 ` Sinan Kaya
2017-03-21 19:38 ` Jean-Philippe Brucker
2017-04-03 8:34 ` Sunil Kovvuri
2017-04-03 10:14 ` Jean-Philippe Brucker
2017-04-03 11:42 ` Sunil Kovvuri
2017-04-03 11:56 ` Jean-Philippe Brucker
2017-05-10 12:54 ` Tomasz Nowicki
2017-05-10 13:35 ` Jean-Philippe Brucker
2017-05-23 8:41 ` Leizhen (ThunderTown)
2017-05-23 11:21 ` Jean-Philippe Brucker
2017-05-25 18:27 ` Roy Franz (Cavium)
2017-02-27 19:54 ` [RFC PATCH 05/30] iommu/arm-smmu-v3: Disable tagged pointers when ATS is in use Jean-Philippe Brucker
2017-05-22 6:27 ` Leizhen (ThunderTown)
2017-05-22 14:02 ` Jean-Philippe Brucker
2017-02-27 19:54 ` [RFC PATCH 06/30] iommu/arm-smmu-v3: Add support for Substream IDs Jean-Philippe Brucker
2017-02-27 19:54 ` [RFC PATCH 07/30] iommu/arm-smmu-v3: Add second level of context descriptor table Jean-Philippe Brucker
2017-05-15 12:47 ` Tomasz Nowicki
2017-05-15 13:57 ` Jean-Philippe Brucker
2017-02-27 19:54 ` [RFC PATCH 08/30] iommu/arm-smmu-v3: Add support for VHE Jean-Philippe Brucker
2017-02-27 19:54 ` [RFC PATCH 09/30] iommu/arm-smmu-v3: Support broadcast TLB maintenance Jean-Philippe Brucker
2017-02-27 19:54 ` [RFC PATCH 10/30] iommu/arm-smmu-v3: Add task contexts Jean-Philippe Brucker
2017-02-27 19:54 ` [RFC PATCH 11/30] arm64: mm: Pin down ASIDs for sharing contexts with devices Jean-Philippe Brucker
2017-02-27 19:54 ` [RFC PATCH 12/30] iommu/arm-smmu-v3: Keep track of process address spaces Jean-Philippe Brucker
2017-02-27 19:54 ` [RFC PATCH 13/30] iommu/io-pgtable-arm: Factor out ARM LPAE register defines Jean-Philippe Brucker
2017-02-27 19:54 ` [RFC PATCH 14/30] iommu/arm-smmu-v3: Share process page tables Jean-Philippe Brucker
2017-02-27 19:54 ` [RFC PATCH 15/30] iommu/arm-smmu-v3: Steal private ASID from a domain Jean-Philippe Brucker
2017-02-27 19:54 ` [RFC PATCH 16/30] iommu/arm-smmu-v3: Use shared ASID set Jean-Philippe Brucker
2017-02-27 19:54 ` Jean-Philippe Brucker [this message]
2017-02-27 19:54 ` [RFC PATCH 18/30] PCI: Make "PRG Response PASID Required" handling common Jean-Philippe Brucker
2017-03-03 21:11 ` Bjorn Helgaas
2017-03-06 11:31 ` Jean-Philippe Brucker
2017-02-27 19:54 ` [RFC PATCH 19/30] PCI: Cache PRI and PASID bits in pci_dev Jean-Philippe Brucker
2017-03-03 21:12 ` Bjorn Helgaas
2017-02-27 19:54 ` [RFC PATCH 20/30] iommu/arm-smmu-v3: Enable PCI PASID in masters Jean-Philippe Brucker
2017-05-31 14:10 ` [RFC,20/30] " Sinan Kaya
2017-06-01 12:30 ` Jean-Philippe Brucker
2017-06-01 12:30 ` David Woodhouse
2017-06-23 14:39 ` Sinan Kaya
2017-06-23 15:15 ` Jean-Philippe Brucker
2017-02-27 19:54 ` [RFC PATCH 21/30] iommu/arm-smmu-v3: Handle device faults from PRI Jean-Philippe Brucker
[not found] ` <8520D5D51A55D047800579B0941471982640F43C@XAP-PVEXMBX02.xlnx.xilinx.com>
2017-03-25 5:16 ` valmiki
2017-03-27 11:05 ` Jean-Philippe Brucker
2017-02-27 19:54 ` [RFC PATCH 22/30] iommu: Bind/unbind tasks to/from devices Jean-Philippe Brucker
2017-03-02 7:29 ` Tian, Kevin
2017-03-03 9:40 ` David Woodhouse
2017-03-03 17:05 ` Raj, Ashok
2017-03-03 18:39 ` Jean-Philippe Brucker
2017-03-22 15:36 ` Joerg Roedel
2017-03-22 18:30 ` Jean-Philippe Brucker
2017-03-22 15:38 ` Joerg Roedel
2017-02-27 19:54 ` [RFC PATCH 23/30] iommu/arm-smmu-v3: Bind/unbind device and task Jean-Philippe Brucker
2017-02-27 19:54 ` [RFC PATCH 24/30] iommu: Specify PASID state when unbinding a task Jean-Philippe Brucker
2017-03-22 15:44 ` Joerg Roedel
2017-03-22 18:31 ` Jean-Philippe Brucker
2017-03-22 22:53 ` Joerg Roedel
2017-03-23 13:37 ` Jean-Philippe Brucker
2017-03-23 14:30 ` Joerg Roedel
2017-03-23 15:52 ` Jean-Philippe Brucker
2017-03-23 16:52 ` Joerg Roedel
2017-03-23 17:03 ` Jean-Philippe Brucker
2017-03-24 11:00 ` Joerg Roedel
2017-03-24 19:08 ` Jean-Philippe Brucker
2017-03-27 15:33 ` Joerg Roedel
2017-02-27 19:54 ` [RFC PATCH 25/30] iommu/arm-smmu-v3: Safe invalidation and recycling of PASIDs Jean-Philippe Brucker
2017-02-27 19:54 ` [RFC PATCH 26/30] iommu/arm-smmu-v3: Fix PRI queue overflow acknowledgement Jean-Philippe Brucker
2017-02-27 19:54 ` [RFC PATCH 27/30] iommu/arm-smmu-v3: Handle PRI queue overflow Jean-Philippe Brucker
2017-02-27 19:54 ` [RFC PATCH 28/30] iommu/arm-smmu-v3: Add support for Hardware Translation Table Update at stage 1 Jean-Philippe Brucker
2017-02-27 19:54 ` [RFC PATCH 29/30] vfio: Add support for Shared Virtual Memory Jean-Philippe Brucker
2017-02-28 3:54 ` Alex Williamson
2017-02-28 15:17 ` Jean-Philippe Brucker
2017-03-21 7:04 ` Liu, Yi L
2017-03-21 19:37 ` Jean-Philippe Brucker
2017-03-21 20:56 ` jacob pan
2017-03-23 8:39 ` Liu, Yi L
2017-03-23 13:38 ` Jean-Philippe Brucker
2017-03-24 7:46 ` Liu, Yi L
2017-03-27 10:13 ` Jean-Philippe Brucker
2017-03-29 6:17 ` Liu, Yi L
2017-04-26 6:53 ` Tomasz Nowicki
2017-04-26 10:08 ` Jean-Philippe Brucker
2017-04-26 11:01 ` Tomasz Nowicki
2017-02-27 19:54 ` [RFC PATCH 30/30] vfio: Allow to bind foreign task Jean-Philippe Brucker
2017-02-28 3:54 ` Alex Williamson
2017-02-28 6:43 ` Tian, Kevin
2017-02-28 15:22 ` Jean-Philippe Brucker
2017-03-01 8:02 ` Tian, Kevin
2017-03-02 10:50 ` Jean-Philippe Brucker
2017-04-26 7:25 ` Tomasz Nowicki
2017-04-26 10:08 ` Jean-Philippe Brucker
2017-03-06 8:20 ` [RFC PATCH 00/30] Add PCIe SVM support to ARM SMMUv3 Liu, Yi L
2017-03-06 11:14 ` Jean-Philippe Brucker
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