------- Comment From [email protected] 2017-03-27 15:08 EDT------- Based on #comment 26 we're ok now, but only to let it registered anyway:
Yes, today I don't see anything we can do in QEMU. The reason is that kernel (arch/powerpc/include/asm/cputable.h) defines a basic feature set for Power8: #define CPU_FTRS_POWER8 (CPU_FTR_USE_TB | CPU_FTR_LWSYNC | \ CPU_FTR_PPCAS_ARCH_V2 | CPU_FTR_CTRL | CPU_FTR_ARCH_206 |\ CPU_FTR_MMCRA | CPU_FTR_SMT | \ CPU_FTR_COHERENT_ICACHE | \ CPU_FTR_PURR | CPU_FTR_SPURR | CPU_FTR_REAL_LE | \ CPU_FTR_DSCR | CPU_FTR_SAO | \ CPU_FTR_STCX_CHECKS_ADDRESS | CPU_FTR_POPCNTB | CPU_FTR_POPCNTD | \ CPU_FTR_ICSWX | CPU_FTR_CFAR | CPU_FTR_HVMODE | CPU_FTR_VMX_COPY | \ CPU_FTR_DBELL | CPU_FTR_HAS_PPR | CPU_FTR_DAWR | \ CPU_FTR_ARCH_207S | CPU_FTR_TM_COMP | CPU_FTR_SUBCORE) and CPU_FTR_TM_COMP (0x0080000000000000) is among them. Then, in arch/powerpc/kernel/prom.c, a function initializes the device tree and scans the CPUs in the current system. During the scan (early_init_dt_scan_cpus), the architecture is identified (arch/powerpc/kernel/cputable.c - identify_cpu) and the feature set above is assigned to the processor. So, in a nutshell, when the kernel loads, the CPU arch is identified and its basic feature set is loaded. Based on it, I could work around it by setting a Power7 arch: qemu- system-ppc64 -machine pseries -cpu POWER7 -vga none -nographic ... Thanks -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1664622 Title: qemu: Missing transaction memory advertisement To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1664622/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
