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authorThomas Falcon <tlfalcon@linux.vnet.ibm.com>2017-06-12 12:35:04 -0500
committerDavid S. Miller <davem@davemloft.net>2017-06-13 12:53:35 -0400
commit40c9db8ad8b4b7f87e2f4a5e80cf1732f2825e6b (patch)
treea3bfcc05ba728599f0406bef396169daebfe23d2 /arch
parent725757aee05e51914b72f25ba2a89c43c3779574 (diff)
ibmvnic: Client-initiated failover
The IBM vNIC protocol provides support for the user to initiate a failover from the client LPAR in case the current backing infrastructure is deemed inadequate or in an error state. Support for two H_VIOCTL sub-commands for vNIC devices are required to implement this function. These commands are H_GET_SESSION_TOKEN and H_SESSION_ERR_DETECTED. "[H_GET_SESSION_TOKEN] is used to obtain a session token from a VNIC client adapter. This token is opaque to the caller and is intended to be used in tandem with the SESSION_ERROR_DETECTED vioctl subfunction." "[H_SESSION_ERR_DETECTED] is used to report that the currently active backing device for a VNIC client adapter is behaving poorly, and that the hypervisor should attempt to fail over to a different backing device, if one is available." To provide tools access to this functionality the vNIC driver creates a sysfs file that, when written to, will send a request to pHyp to failover to a different backing device. Signed-off-by: Thomas Falcon <tlfalcon@linux.vnet.ibm.com> Reviewed-by: Nathan Fontenot <nfont@linux.vnet.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/include/asm/hvcall.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/hvcall.h b/arch/powerpc/include/asm/hvcall.h
index d73755fafbb0..57d38b504ff7 100644
--- a/arch/powerpc/include/asm/hvcall.h
+++ b/arch/powerpc/include/asm/hvcall.h
@@ -295,6 +295,8 @@
#define H_DISABLE_ALL_VIO_INTS 0x0A
#define H_DISABLE_VIO_INTERRUPT 0x0B
#define H_ENABLE_VIO_INTERRUPT 0x0C
+#define H_GET_SESSION_TOKEN 0x19
+#define H_SESSION_ERR_DETECTED 0x1A
/* Platform specific hcalls, used by KVM */