8 Jun
2018
8 Jun
'18
6:50 a.m.
Mahesh J Salgaonkar mahesh@linux.vnet.ibm.com writes:
From: Mahesh Salgaonkar mahesh@linux.vnet.ibm.com
During Machine Check interrupt on pseries platform, register r3 points RTAS extended event log passed by hypervisor. Since hypervisor uses r3 to pass pointer to rtas log, it stores the original r3 value at the start of the memory (first 8 bytes) pointed by r3. Since hypervisor stores this info and rtas log is in BE format, linux should make sure to restore r3 value in correct endian format.
Can we hit this under KVM? And if so what if the KVM/qemu is running little endian, does it still write the value BE?
cheers