Messages in this thread Patch in this message | | | Date | Tue, 31 Mar 2020 09:08:43 -0700 | From | Jacob Pan <> | Subject | Re: [PATCH] iommu/vt-d: Fix PASID cache flush |
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Actually, this is not a bug. The current code has: #define QI_PC_PASID_SEL (QI_PC_TYPE | QI_PC_GRAN(1))
Which already has the type and shift.
In my vSVA series, I redefined granu such that I can use them in the 2D table lookup.
-#define QI_PC_ALL_PASIDS (QI_PC_TYPE | QI_PC_GRAN(0)) -#define QI_PC_PASID_SEL (QI_PC_TYPE | QI_PC_GRAN(1)) +/* PASID cache invalidation granu */ +#define QI_PC_ALL_PASIDS 0 +#define QI_PC_PASID_SEL 1
Please ignore this, sorry about the confusion.
On Tue, 31 Mar 2020 11:28:17 +0200 Auger Eric <eric.auger@redhat.com> wrote:
> Hi Jacob, > > On 3/31/20 1:25 AM, Jacob Pan wrote: > > PASID cache type and shift of granularity bits are missing in > > the current code. > > > > Fixes: 6f7db75e1c46 ("iommu/vt-d: Add second level page table > > interface") > > > > Cc: Eric Auger <eric.auger@redhat.com> > > Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com> > Reviewed-by: Eric Auger <eric.auger@redhat.com> > > Thanks > > Eric > > > --- > > drivers/iommu/intel-pasid.c | 3 ++- > > 1 file changed, 2 insertions(+), 1 deletion(-) > > > > diff --git a/drivers/iommu/intel-pasid.c > > b/drivers/iommu/intel-pasid.c index 22b30f10b396..57d05b0fbafc > > 100644 --- a/drivers/iommu/intel-pasid.c > > +++ b/drivers/iommu/intel-pasid.c > > @@ -365,7 +365,8 @@ pasid_cache_invalidation_with_pasid(struct > > intel_iommu *iommu, { > > struct qi_desc desc; > > > > - desc.qw0 = QI_PC_DID(did) | QI_PC_PASID_SEL | > > QI_PC_PASID(pasid); > > + desc.qw0 = QI_PC_DID(did) | QI_PC_GRAN(QI_PC_PASID_SEL) | > > + QI_PC_PASID(pasid) | QI_PC_TYPE; > > desc.qw1 = 0; > > desc.qw2 = 0; > > desc.qw3 = 0; > > >
[Jacob Pan]
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