Re: [PATCH] powerpc: fix hardware PMU exception bug on PowerVM compatibility mode systems

2020-02-27 Thread Desnes Augusto Nunes do Rosario
Hello Leonardo, On 2/15/20 2:39 AM, Leonardo Bras wrote: Hello Desnes, thanks for the patch. "Desnes A. Nunes do Rosario" writes: PowerVM systems running compatibility mode on a few Power8 revisions are still vulnerable to the hardware defect that loses PMU exceptions arriving prior to a con

Re: [PATCH] powerpc: fix hardware PMU exception bug on PowerVM compatibility mode systems

2020-02-14 Thread Leonardo Bras
Hello Desnes, thanks for the patch. On Thu, 2020-02-13 at 21:19 -0300, Desnes A. Nunes do Rosario wrote: > PowerVM systems running compatibility mode on a few Power8 revisions are > still vulnerable to the hardware defect that loses PMU exceptions arriving > prior to a context switch. > > The sof

Re: [PATCH] powerpc: fix hardware PMU exception bug on PowerVM compatibility mode systems

2020-02-14 Thread Leonardo Bras
Hello Desnes, thanks for the patch. "Desnes A. Nunes do Rosario" writes: > PowerVM systems running compatibility mode on a few Power8 revisions are > still vulnerable to the hardware defect that loses PMU exceptions arriving > prior to a context switch. > > The software fix for this issue is ena

[PATCH] powerpc: fix hardware PMU exception bug on PowerVM compatibility mode systems

2020-02-13 Thread Desnes A. Nunes do Rosario
PowerVM systems running compatibility mode on a few Power8 revisions are still vulnerable to the hardware defect that loses PMU exceptions arriving prior to a context switch. The software fix for this issue is enabled through the CPU_FTR_PMAO_BUG cpu_feature bit, nevertheless this bit also needs t