On Mon, 2017-10-02 at 18:27 +0200, Cédric Le Goater wrote: > On 09/23/2017 10:26 AM, Cédric Le Goater wrote: > > Hi, > > > > Here are a couple of small fixes to support CPU hot unplug. There are > > still some issues to be investigated as, in some occasions, after a > > couple of plug and unplug, the cpu which was removed receives a 'lost' > > interrupt. This showed to be the decrementer under QEMU. > > So this seems to be a QEMU issue only which can be solved by > removing the DEE bit from the LPCR on P9 processor when the CPU > is stopped in rtas. PECE3 bit on P8 processors.
It should be the same bit no ? > I think these patches are valuable fixes for 4.14. The first > is trivial and the second touches the common xive part but it > is only called on the pseries platform. > > Could you please take a look ? > > Thanks, > > C. > > > Nevertheless, these patches are required and provide a significant > > improvement to support CPU removal. > > > > Tested under a phyp and a XIVE QEMU model for pseries. > > > > Thanks, > > > > C. > > > > Cédric Le Goater (2): > > powerpc/xive: fix IPI reset > > powerpc/xive: fix cpu removal > > > > arch/powerpc/sysdev/xive/common.c | 8 ++++++++ > > arch/powerpc/sysdev/xive/spapr.c | 4 ++++ > > 2 files changed, 12 insertions(+) > >
