Thread (27 messages) 27 messages, 4 authors, 2017-01-13

[PATCH kernel v2 01/11] KVM: PPC: Reserve KVM_CAP_SPAPR_TCE_VFIO capability number

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From: Alexey Kardashevskiy <hidden>
Date: 2016-12-18 01:29:43
Also in: kvm
Subsystem: kernel virtual machine (kvm), the rest · Maintainers: Paolo Bonzini, Linus Torvalds

Revision v2 of 11 in this series; 1 review trailer.

Revisions (11)
  1. v1 [diff vs current]
  2. v1 [diff vs current]
  3. v2 current
  4. v4 [diff vs current]
  5. v5 [diff vs current]
  6. v6 [diff vs current]
  7. v7 [diff vs current]
  8. v8 [diff vs current]
  9. v9 [diff vs current]
  10. v10 [diff vs current]
  11. v11 [diff vs current]
This adds a capability number for in-kernel support for VFIO on
SPAPR platform.

The capability will tell the user space whether in-kernel handlers of
H_PUT_TCE can handle VFIO-targeted requests or not. If not, the user space
must not attempt allocating a TCE table in the host kernel via
the KVM_CREATE_SPAPR_TCE KVM ioctl because in that case TCE requests
will not be passed to the user space which is desired action in
the situation like that.

Signed-off-by: Alexey Kardashevskiy <redacted>
Reviewed-by: David Gibson <redacted>
---
 include/uapi/linux/kvm.h | 1 +
 1 file changed, 1 insertion(+)
diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index 300ef255d1e0..810f74317987 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -870,6 +870,7 @@ struct kvm_ppc_smmu_info {
 #define KVM_CAP_S390_USER_INSTR0 130
 #define KVM_CAP_MSI_DEVID 131
 #define KVM_CAP_PPC_HTM 132
+#define KVM_CAP_SPAPR_TCE_VFIO 133
 
 #ifdef KVM_CAP_IRQ_ROUTING
 
-- 
2.11.0
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