From: Jacob Pan <jacob.jun.pan@linux.intel.com>
To: iommu@lists.linux-foundation.org,
LKML <linux-kernel@vger.kernel.org>,
Joerg Roedel <joro@8bytes.org>,
David Woodhouse <dwmw2@infradead.org>,
Alex Williamson <alex.williamson@redhat.com>,
Jean-Philippe Brucker <jean-philippe@linaro.com>
Cc: "Yi Liu" <yi.l.liu@intel.com>,
"Tian, Kevin" <kevin.tian@intel.com>,
Raj Ashok <ashok.raj@intel.com>,
"Christoph Hellwig" <hch@infradead.org>,
"Lu Baolu" <baolu.lu@linux.intel.com>,
Jonathan Cameron <jic23@kernel.org>,
Eric Auger <eric.auger@redhat.com>,
Jacob Pan <jacob.jun.pan@linux.intel.com>
Subject: [PATCH v7 01/11] iommu/vt-d: Cache virtual command capability register
Date: Thu, 24 Oct 2019 12:54:54 -0700 [thread overview]
Message-ID: <1571946904-86776-2-git-send-email-jacob.jun.pan@linux.intel.com> (raw)
In-Reply-To: <1571946904-86776-1-git-send-email-jacob.jun.pan@linux.intel.com>
Virtual command registers are used in the guest only, to prevent
vmexit cost, we cache the capability and store it during initialization.
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
---
drivers/iommu/dmar.c | 1 +
include/linux/intel-iommu.h | 4 ++++
2 files changed, 5 insertions(+)
diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index eecd6a421667..49bb7d76e646 100644
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -950,6 +950,7 @@ static int map_iommu(struct intel_iommu *iommu, u64 phys_addr)
warn_invalid_dmar(phys_addr, " returns all ones");
goto unmap;
}
+ iommu->vccap = dmar_readq(iommu->reg + DMAR_VCCAP_REG);
/* the registers might be more than one page */
map_size = max_t(int, ecap_max_iotlb_offset(iommu->ecap),
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
index ed11ef594378..2e1bed9b7eef 100644
--- a/include/linux/intel-iommu.h
+++ b/include/linux/intel-iommu.h
@@ -186,6 +186,9 @@
#define ecap_max_handle_mask(e) ((e >> 20) & 0xf)
#define ecap_sc_support(e) ((e >> 7) & 0x1) /* Snooping Control */
+/* Virtual command interface capabilities */
+#define vccap_pasid(v) ((v & DMA_VCS_PAS)) /* PASID allocation */
+
/* IOTLB_REG */
#define DMA_TLB_FLUSH_GRANU_OFFSET 60
#define DMA_TLB_GLOBAL_FLUSH (((u64)1) << 60)
@@ -520,6 +523,7 @@ struct intel_iommu {
u64 reg_size; /* size of hw register set */
u64 cap;
u64 ecap;
+ u64 vccap;
u32 gcmd; /* Holds TE, EAFL. Don't need SRTP, SFL, WBF */
raw_spinlock_t register_lock; /* protect register handling */
int seq_id; /* sequence id of the iommu */
--
2.7.4
next prev parent reply other threads:[~2019-10-24 19:50 UTC|newest]
Thread overview: 79+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-24 19:54 [PATCH v7 00/11] Nested Shared Virtual Address (SVA) VT-d support Jacob Pan
2019-10-24 19:54 ` Jacob Pan [this message]
2019-10-25 2:53 ` [PATCH v7 01/11] iommu/vt-d: Cache virtual command capability register Lu Baolu
2019-10-25 6:06 ` Tian, Kevin
2019-11-08 10:32 ` Auger Eric
2019-10-24 19:54 ` [PATCH v7 02/11] iommu/vt-d: Enlightened PASID allocation Jacob Pan
2019-10-25 6:19 ` Tian, Kevin
2019-10-29 17:14 ` Jacob Pan
2019-10-29 18:16 ` Tian, Kevin
2019-11-08 10:33 ` Auger Eric
2019-11-08 22:22 ` Jacob Pan
2019-10-24 19:54 ` [PATCH v7 03/11] iommu/vt-d: Add custom allocator for IOASID Jacob Pan
2019-10-25 2:30 ` Lu Baolu
2019-10-25 4:43 ` Jacob Pan
2019-10-25 6:40 ` Tian, Kevin
2019-10-25 14:39 ` Lu Baolu
2019-10-25 15:52 ` Tian, Kevin
2019-10-28 22:49 ` Jacob Pan
2019-10-29 2:22 ` Lu Baolu
2019-10-25 6:31 ` Tian, Kevin
2019-10-28 22:52 ` Jacob Pan
2019-11-08 10:40 ` Auger Eric
2019-11-08 22:26 ` Jacob Pan
2019-10-24 19:54 ` [PATCH v7 04/11] iommu/vt-d: Replace Intel specific PASID allocator with IOASID Jacob Pan
2019-10-25 5:47 ` Lu Baolu
2019-11-01 18:29 ` Jacob Pan
2019-10-25 6:41 ` Tian, Kevin
2019-10-28 22:46 ` Jacob Pan
2019-11-08 11:30 ` Auger Eric
2019-11-08 22:55 ` Jacob Pan
2019-11-12 9:54 ` Auger Eric
2019-10-24 19:54 ` [PATCH v7 05/11] iommu/vt-d: Move domain helper to header Jacob Pan
2019-10-25 5:26 ` Lu Baolu
2019-10-24 19:54 ` [PATCH v7 06/11] iommu/vt-d: Avoid duplicated code for PASID setup Jacob Pan
2019-10-25 5:32 ` Lu Baolu
2019-10-25 6:42 ` Tian, Kevin
2019-10-28 22:41 ` Jacob Pan
2019-11-12 9:54 ` Auger Eric
2019-10-24 19:55 ` [PATCH v7 07/11] iommu/vt-d: Add nested translation helper function Jacob Pan
2019-10-25 7:04 ` Tian, Kevin
2019-11-01 21:10 ` Jacob Pan
2019-10-25 15:04 ` Lu Baolu
2019-10-25 16:06 ` Jacob Pan
2019-11-08 13:55 ` Auger Eric
2019-10-24 19:55 ` [PATCH v7 08/11] iommu/vt-d: Misc macro clean up for SVM Jacob Pan
2019-10-26 1:00 ` Lu Baolu
2019-10-28 22:38 ` Jacob Pan
2019-10-24 19:55 ` [PATCH v7 09/11] iommu/vt-d: Add bind guest PASID support Jacob Pan
2019-10-25 7:19 ` Tian, Kevin
2019-10-25 17:33 ` Jacob Pan
2019-10-28 6:03 ` Tian, Kevin
2019-10-28 16:02 ` Jacob Pan
2019-10-29 7:57 ` Tian, Kevin
2019-10-29 16:11 ` Jacob Pan
2019-10-29 18:04 ` Tian, Kevin
2019-10-29 2:33 ` Lu Baolu
2019-10-26 2:01 ` Lu Baolu
2019-10-28 22:29 ` Jacob Pan
2019-10-29 2:54 ` Lu Baolu
2019-10-29 4:11 ` Jacob Pan
2019-10-29 5:04 ` Lu Baolu
2019-10-24 19:55 ` [PATCH v7 10/11] iommu/vt-d: Support flushing more translation cache types Jacob Pan
2019-10-25 7:21 ` Tian, Kevin
2019-11-01 21:30 ` Jacob Pan
2019-10-26 2:22 ` Lu Baolu
2019-11-01 21:28 ` Jacob Pan
2019-11-08 16:18 ` Auger Eric
2019-11-08 23:05 ` Jacob Pan
2019-10-24 19:55 ` [PATCH v7 11/11] iommu/vt-d: Add svm/sva invalidate function Jacob Pan
2019-10-25 7:27 ` Tian, Kevin
2019-10-26 2:40 ` Lu Baolu
2019-10-26 7:03 ` Lu Baolu
2019-10-28 6:06 ` Tian, Kevin
2019-10-28 16:10 ` Jacob Pan
2019-10-29 18:52 ` Tian, Kevin
2019-10-29 19:25 ` Jacob Pan
2019-10-28 16:13 ` Jacob Pan
2019-11-12 10:28 ` Auger Eric
2020-02-15 1:18 ` Jacob Pan
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