From: Jacob Pan <jacob.jun.pan@linux.intel.com>
To: "Tian, Kevin" <kevin.tian@intel.com>
Cc: "Raj, Ashok" <ashok.raj@intel.com>,
Jean-Philippe Brucker <jean-philippe@linaro.com>,
"iommu@lists.linux-foundation.org"
<iommu@lists.linux-foundation.org>,
LKML <linux-kernel@vger.kernel.org>,
Alex Williamson <alex.williamson@redhat.com>,
David Woodhouse <dwmw2@infradead.org>,
Jonathan Cameron <jic23@kernel.org>
Subject: Re: [PATCH V10 09/11] iommu/vt-d: Cache virtual command capability register
Date: Tue, 31 Mar 2020 15:33:27 -0700 [thread overview]
Message-ID: <20200331153327.50219c12@jacob-builder> (raw)
In-Reply-To: <AADFC41AFE54684AB9EE6CBC0274A5D19D7FA0E7@SHSMSX104.ccr.corp.intel.com>
On Sat, 28 Mar 2020 10:04:38 +0000
"Tian, Kevin" <kevin.tian@intel.com> wrote:
> > From: Jacob Pan <jacob.jun.pan@linux.intel.com>
> > Sent: Saturday, March 21, 2020 7:28 AM
> >
> > 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
> > ---
> > ---
> > 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 43539713b3b3..ccbf164fb711
> > 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 capabilities */
>
> capabilities -> capability
Will do, I was thinking the future :)
Thanks,
Jacob
>
> Reviewed-by: Kevin Tian <kevin.tian@intel.com>
>
> > +#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
> > {
> > \ @@ -537,6 +541,7 @@ 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
>
[Jacob Pan]
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iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2020-03-31 22:27 UTC|newest]
Thread overview: 67+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-20 23:27 [PATCH V10 00/11] Nested Shared Virtual Address (SVA) VT-d support Jacob Pan
2020-03-20 23:27 ` [PATCH V10 01/11] iommu/vt-d: Move domain helper to header Jacob Pan
2020-03-27 11:48 ` Tian, Kevin
2020-03-20 23:27 ` [PATCH V10 02/11] iommu/uapi: Define a mask for bind data Jacob Pan
2020-03-22 1:29 ` Lu Baolu
2020-03-23 19:37 ` Jacob Pan
2020-03-24 1:50 ` Lu Baolu
2020-03-27 11:50 ` Tian, Kevin
2020-03-27 14:13 ` Auger Eric
2020-03-20 23:27 ` [PATCH V10 03/11] iommu/vt-d: Add a helper function to skip agaw Jacob Pan
2020-03-27 11:53 ` Tian, Kevin
2020-03-29 7:20 ` Lu Baolu
2020-03-30 17:50 ` Jacob Pan
2020-03-20 23:27 ` [PATCH V10 04/11] iommu/vt-d: Use helper function to skip agaw for SL Jacob Pan
2020-03-27 11:55 ` Tian, Kevin
2020-03-27 16:05 ` Auger Eric
2020-03-29 7:35 ` Lu Baolu
2020-03-20 23:27 ` [PATCH V10 05/11] iommu/vt-d: Add nested translation helper function Jacob Pan
2020-03-27 12:21 ` Tian, Kevin
2020-03-29 8:03 ` Lu Baolu
2020-03-30 18:21 ` Jacob Pan
2020-03-31 3:36 ` Tian, Kevin
2020-03-29 11:35 ` Auger Eric
2020-04-01 20:06 ` Jacob Pan
2020-03-20 23:27 ` [PATCH V10 06/11] iommu/vt-d: Add bind guest PASID support Jacob Pan
2020-03-28 8:02 ` Tian, Kevin
2020-03-30 20:51 ` Jacob Pan
2020-03-31 3:43 ` Tian, Kevin
2020-04-01 17:13 ` Jacob Pan
2020-03-29 13:40 ` Auger Eric
2020-03-30 22:53 ` Jacob Pan
2020-03-20 23:27 ` [PATCH V10 07/11] iommu/vt-d: Support flushing more translation cache types Jacob Pan
2020-03-27 14:46 ` Auger Eric
2020-03-30 23:28 ` Jacob Pan
2020-03-31 16:13 ` Jacob Pan
2020-03-31 16:15 ` Auger Eric
2020-03-20 23:27 ` [PATCH V10 08/11] iommu/vt-d: Add svm/sva invalidate function Jacob Pan
2020-03-28 10:01 ` Tian, Kevin
2020-03-29 15:34 ` Auger Eric
2020-03-31 2:49 ` Tian, Kevin
2020-03-31 20:58 ` Jacob Pan
2020-04-01 6:29 ` Tian, Kevin
2020-04-01 7:13 ` Liu, Yi L
2020-04-01 7:32 ` Auger Eric
2020-04-01 16:05 ` Jacob Pan
2020-04-02 15:54 ` Jacob Pan
2020-03-29 16:05 ` Auger Eric
2020-03-31 3:34 ` Tian, Kevin
2020-03-31 21:07 ` Jacob Pan
2020-04-01 6:32 ` Tian, Kevin
2020-03-31 18:13 ` Jacob Pan
2020-04-01 6:24 ` Tian, Kevin
2020-04-01 6:57 ` Liu, Yi L
2020-04-01 16:03 ` Jacob Pan
2020-03-29 16:05 ` Auger Eric
2020-03-31 22:28 ` Jacob Pan
2020-03-20 23:27 ` [PATCH V10 09/11] iommu/vt-d: Cache virtual command capability register Jacob Pan
2020-03-28 10:04 ` Tian, Kevin
2020-03-31 22:33 ` Jacob Pan [this message]
2020-03-20 23:27 ` [PATCH V10 10/11] iommu/vt-d: Enlightened PASID allocation Jacob Pan
2020-03-28 10:08 ` Tian, Kevin
2020-03-31 22:37 ` Jacob Pan
2020-03-20 23:27 ` [PATCH V10 11/11] iommu/vt-d: Add custom allocator for IOASID Jacob Pan
2020-03-28 10:22 ` Tian, Kevin
2020-04-01 15:47 ` Jacob Pan
2020-04-02 2:18 ` Tian, Kevin
2020-04-02 20:28 ` Jacob Pan
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