Patchwork [1/3] PPC: KVM: Reserve KVM_CAP_SPAPR_TCE_VFIO capability number

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Submitter Alexey Kardashevskiy
Date June 5, 2014, 7:25 a.m.
Message ID <1401953144-19186-2-git-send-email-aik@ozlabs.ru>
Download mbox | patch
Permalink /patch/356195/
State New
Headers show

Comments

Alexey Kardashevskiy - June 5, 2014, 7:25 a.m.
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 <aik@ozlabs.ru>
---
 include/uapi/linux/kvm.h | 1 +
 1 file changed, 1 insertion(+)

Patch

diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
index a8f4ee5..944cd21 100644
--- a/include/uapi/linux/kvm.h
+++ b/include/uapi/linux/kvm.h
@@ -743,6 +743,7 @@  struct kvm_ppc_smmu_info {
 #define KVM_CAP_IOAPIC_POLARITY_IGNORED 97
 #define KVM_CAP_ENABLE_CAP_VM 98
 #define KVM_CAP_S390_IRQCHIP 99
+#define KVM_CAP_SPAPR_TCE_VFIO 100
 
 #ifdef KVM_CAP_IRQ_ROUTING