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authorLinus Torvalds <torvalds@linux-foundation.org>2015-04-26 17:47:46 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-26 17:47:46 -0700
commit9f86262dcc573ca195488de9ec6e4d6d74288ad3 (patch)
treed320244d8c559597ead3108bf2bbfb135ab7fec0 /include
parent85f2901bdf4bdc0d034e1bbe8629e269ec200389 (diff)
parent03ecc32c5274962b9b1904d7a730e71c95bac05f (diff)
Merge git://git.infradead.org/intel-iommu
Pull intel iommu updates from David Woodhouse: "This lays a little of the groundwork for upcoming Shared Virtual Memory support — fixing some bogus #defines for capability bits and adding the new ones, and starting to use the new wider page tables where we can, in anticipation of actually filling in the new fields therein. It also allows graphics devices to be assigned to VM guests again. This got broken in 3.17 by disallowing assignment of RMRR-afflicted devices. Like USB, we do understand why there's an RMRR for graphics devices — and unlike USB, it's actually sane. So we can make an exception for graphics devices, just as we do USB controllers. Finally, tone down the warning about the X2APIC_OPT_OUT bit, due to persistent requests. X2APIC_OPT_OUT was added to the spec as a nasty hack to allow broken BIOSes to forbid us from using X2APIC when they do stupid and invasive things and would break if we did. Someone noticed that since Windows doesn't have full IOMMU support for DMA protection, setting the X2APIC_OPT_OUT bit made Windows avoid initialising the IOMMU on the graphics unit altogether. This means that it would be available for use in "driver mode", where the IOMMU registers are made available through a BAR of the graphics device and the graphics driver can do SVM all for itself. So they started setting the X2APIC_OPT_OUT bit on *all* platforms with SVM capabilities. And even the platforms which *might*, if the planets had been aligned correctly, possibly have had SVM capability but which in practice actually don't" * git://git.infradead.org/intel-iommu: iommu/vt-d: support extended root and context entries iommu/vt-d: Add new extended capabilities from v2.3 VT-d specification iommu/vt-d: Allow RMRR on graphics devices too iommu/vt-d: Print x2apic opt out info instead of printing a warning iommu/vt-d: kill bogus ecap_niotlb_iunits()
Diffstat (limited to 'include')
-rw-r--r--include/linux/intel-iommu.h18
1 files changed, 15 insertions, 3 deletions
diff --git a/include/linux/intel-iommu.h b/include/linux/intel-iommu.h
index a65208a8fe18..796ef9645827 100644
--- a/include/linux/intel-iommu.h
+++ b/include/linux/intel-iommu.h
@@ -115,10 +115,19 @@ static inline void dmar_writeq(void __iomem *addr, u64 val)
* Extended Capability Register
*/
-#define ecap_niotlb_iunits(e) ((((e) >> 24) & 0xff) + 1)
+#define ecap_pss(e) ((e >> 35) & 0x1f)
+#define ecap_eafs(e) ((e >> 34) & 0x1)
+#define ecap_nwfs(e) ((e >> 33) & 0x1)
+#define ecap_srs(e) ((e >> 31) & 0x1)
+#define ecap_ers(e) ((e >> 30) & 0x1)
+#define ecap_prs(e) ((e >> 29) & 0x1)
+#define ecap_pasid(e) ((e >> 28) & 0x1)
+#define ecap_dis(e) ((e >> 27) & 0x1)
+#define ecap_nest(e) ((e >> 26) & 0x1)
+#define ecap_mts(e) ((e >> 25) & 0x1)
+#define ecap_ecs(e) ((e >> 24) & 0x1)
#define ecap_iotlb_offset(e) ((((e) >> 8) & 0x3ff) * 16)
-#define ecap_max_iotlb_offset(e) \
- (ecap_iotlb_offset(e) + ecap_niotlb_iunits(e) * 16)
+#define ecap_max_iotlb_offset(e) (ecap_iotlb_offset(e) + 16)
#define ecap_coherent(e) ((e) & 0x1)
#define ecap_qis(e) ((e) & 0x2)
#define ecap_pass_through(e) ((e >> 6) & 0x1)
@@ -180,6 +189,9 @@ static inline void dmar_writeq(void __iomem *addr, u64 val)
#define DMA_GSTS_IRES (((u32)1) << 25)
#define DMA_GSTS_CFIS (((u32)1) << 23)
+/* DMA_RTADDR_REG */
+#define DMA_RTADDR_RTT (((u64)1) << 11)
+
/* CCMD_REG */
#define DMA_CCMD_ICC (((u64)1) << 63)
#define DMA_CCMD_GLOBAL_INVL (((u64)1) << 61)

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