From: Jacob Pan <jacob.jun.pan@linux.intel.com>
To: "Lu Baolu" <baolu.lu@linux.intel.com>,
iommu@lists.linux-foundation.org,
LKML <linux-kernel@vger.kernel.org>,
Joerg Roedel <joro@8bytes.org>,
David Woodhouse <dwmw2@infradead.org>,
Jean-Philippe Brucker <jean-philippe@linaro.com>,
Eric Auger <eric.auger@redhat.com>
Cc: "Yi Liu" <yi.l.liu@intel.com>,
"Tian, Kevin" <kevin.tian@intel.com>,
Raj Ashok <ashok.raj@intel.com>,
Alex Williamson <alex.williamson@redhat.com>,
"Christoph Hellwig" <hch@infradead.org>,
Jonathan Cameron <jic23@kernel.org>,
Jacob Pan <jacob.jun.pan@linux.intel.com>
Subject: [PATCH v11 08/10] iommu/vt-d: Cache virtual command capability register
Date: Fri, 3 Apr 2020 11:42:12 -0700 [thread overview]
Message-ID: <1585939334-21396-9-git-send-email-jacob.jun.pan@linux.intel.com> (raw)
In-Reply-To: <1585939334-21396-1-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>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
---
v7 Reviewed by Eric & Baolu
---
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
---
drivers/iommu/dmar.c | 1 +
include/linux/intel-iommu.h | 5 +++++
2 files changed, 6 insertions(+)
diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c
index 4d6b7b5b37ee..3b36491c8bbb 100644
--- a/drivers/iommu/dmar.c
+++ b/drivers/iommu/dmar.c
@@ -963,6 +963,7 @@ 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 f775bb825343..e02a96848586 100644
--- a/include/linux/intel-iommu.h
+++ b/include/linux/intel-iommu.h
@@ -194,6 +194,9 @@
#define ecap_max_handle_mask(e) ((e >> 20) & 0xf)
#define ecap_sc_support(e) ((e >> 7) & 0x1) /* Snooping Control */
+/* Virtual command interface capability */
+#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)
@@ -287,6 +290,7 @@
/* PRS_REG */
#define DMA_PRS_PPR ((u32)1)
+#define DMA_VCS_PAS ((u64)1)
#define IOMMU_WAIT_OP(iommu, offset, op, cond, sts) \
do { \
@@ -562,6 +566,7 @@ 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:[~2020-04-03 18:36 UTC|newest]
Thread overview: 33+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-03 18:42 [PATCH v11 00/10] Nested Shared Virtual Address (SVA) VT-d support Jacob Pan
2020-04-03 18:42 ` [PATCH v11 01/10] iommu/vt-d: Move domain helper to header Jacob Pan
2020-04-03 18:42 ` [PATCH v11 02/10] iommu/uapi: Define a mask for bind data Jacob Pan
2020-04-08 13:07 ` Joerg Roedel
2020-04-08 16:11 ` Jacob Pan
2020-04-03 18:42 ` [PATCH v11 03/10] iommu/vt-d: Use a helper function to skip agaw for SL Jacob Pan
2020-04-05 6:37 ` Auger Eric
2020-04-03 18:42 ` [PATCH v11 04/10] iommu/vt-d: Add nested translation helper function Jacob Pan
2020-04-08 13:33 ` Auger Eric
2020-04-03 18:42 ` [PATCH v11 05/10] iommu/vt-d: Add bind guest PASID support Jacob Pan
2020-04-09 7:41 ` Auger Eric
2020-04-10 19:45 ` Jacob Pan
2020-04-16 10:43 ` Auger Eric
2020-04-17 2:45 ` Tian, Kevin
2020-04-17 7:46 ` Auger Eric
2020-04-17 15:28 ` Jacob Pan
2020-04-17 23:46 ` Tian, Kevin
2020-04-27 17:28 ` Jacob Pan
2020-04-10 21:06 ` Jacob Pan
2020-04-16 10:46 ` Auger Eric
2020-04-03 18:42 ` [PATCH v11 06/10] iommu/vt-d: Support flushing more translation cache types Jacob Pan
2020-04-05 6:37 ` Auger Eric
2020-04-03 18:42 ` [PATCH v11 07/10] iommu/vt-d: Add svm/sva invalidate function Jacob Pan
2020-04-09 8:50 ` Auger Eric
2020-04-10 21:56 ` Jacob Pan
2020-04-16 10:59 ` Auger Eric
2020-04-17 16:14 ` Jacob Pan
2020-04-03 18:42 ` Jacob Pan [this message]
2020-04-09 10:14 ` [PATCH v11 08/10] iommu/vt-d: Cache virtual command capability register Auger Eric
2020-04-03 18:42 ` [PATCH v11 09/10] iommu/vt-d: Enlightened PASID allocation Jacob Pan
2020-04-03 18:42 ` [PATCH v11 10/10] iommu/vt-d: Add custom allocator for IOASID Jacob Pan
2020-04-09 10:31 ` Auger Eric
2020-04-05 8:28 ` [PATCH v11 00/10] Nested Shared Virtual Address (SVA) VT-d support Lu Baolu
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