diff options
| author | Cédric Le Goater <clg@kaod.org> | 2019-04-18 12:39:31 +0200 |
|---|---|---|
| committer | Paul Mackerras <paulus@ozlabs.org> | 2019-04-30 11:35:16 +0200 |
| commit | 13ce3297c5766b9541b6a7a255794c5168a7ae1a (patch) | |
| tree | e2d75ee5fedbc81061d5c359f140fb4656c8ec5c /arch/powerpc/include/uapi | |
| parent | KVM: PPC: Book3S HV: XIVE: Add a control to configure a source (diff) | |
| download | linux-13ce3297c5766b9541b6a7a255794c5168a7ae1a.tar.xz linux-13ce3297c5766b9541b6a7a255794c5168a7ae1a.zip | |
KVM: PPC: Book3S HV: XIVE: Add controls for the EQ configuration
These controls will be used by the H_INT_SET_QUEUE_CONFIG and
H_INT_GET_QUEUE_CONFIG hcalls from QEMU to configure the underlying
Event Queue in the XIVE IC. They will also be used to restore the
configuration of the XIVE EQs and to capture the internal run-time
state of the EQs. Both 'get' and 'set' rely on an OPAL call to access
the EQ toggle bit and EQ index which are updated by the XIVE IC when
event notifications are enqueued in the EQ.
The value of the guest physical address of the event queue is saved in
the XIVE internal xive_q structure for later use. That is when
migration needs to mark the EQ pages dirty to capture a consistent
memory state of the VM.
To be noted that H_INT_SET_QUEUE_CONFIG does not require the extra
OPAL call setting the EQ toggle bit and EQ index to configure the EQ,
but restoring the EQ state will.
Signed-off-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Diffstat (limited to 'arch/powerpc/include/uapi')
| -rw-r--r-- | arch/powerpc/include/uapi/asm/kvm.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/powerpc/include/uapi/asm/kvm.h b/arch/powerpc/include/uapi/asm/kvm.h index e8161e21629b..85005400fd86 100644 --- a/arch/powerpc/include/uapi/asm/kvm.h +++ b/arch/powerpc/include/uapi/asm/kvm.h @@ -681,6 +681,7 @@ struct kvm_ppc_cpu_char { #define KVM_DEV_XIVE_GRP_CTRL 1 #define KVM_DEV_XIVE_GRP_SOURCE 2 /* 64-bit source identifier */ #define KVM_DEV_XIVE_GRP_SOURCE_CONFIG 3 /* 64-bit source identifier */ +#define KVM_DEV_XIVE_GRP_EQ_CONFIG 4 /* 64-bit EQ identifier */ /* Layout of 64-bit XIVE source attribute values */ #define KVM_XIVE_LEVEL_SENSITIVE (1ULL << 0) @@ -696,4 +697,22 @@ struct kvm_ppc_cpu_char { #define KVM_XIVE_SOURCE_EISN_SHIFT 33 #define KVM_XIVE_SOURCE_EISN_MASK 0xfffffffe00000000ULL +/* Layout of 64-bit EQ identifier */ +#define KVM_XIVE_EQ_PRIORITY_SHIFT 0 +#define KVM_XIVE_EQ_PRIORITY_MASK 0x7 +#define KVM_XIVE_EQ_SERVER_SHIFT 3 +#define KVM_XIVE_EQ_SERVER_MASK 0xfffffff8ULL + +/* Layout of EQ configuration values (64 bytes) */ +struct kvm_ppc_xive_eq { + __u32 flags; + __u32 qshift; + __u64 qaddr; + __u32 qtoggle; + __u32 qindex; + __u8 pad[40]; +}; + +#define KVM_XIVE_EQ_ALWAYS_NOTIFY 0x00000001 + #endif /* __LINUX_KVM_POWERPC_H */ |