> -----Original Message----- > From: kvm-ppc-owner@xxxxxxxxxxxxxxx > [mailto:kvm-ppc-owner@xxxxxxxxxxxxxxx] On Behalf Of Scott Wood > Sent: Thursday, March 31, 2011 7:35 AM > To: agraf@xxxxxxx > Cc: kvm-ppc@xxxxxxxxxxxxxxx > Subject: [PATCH v5 4/4] KVM: PPC: e500: Save/restore SPE state > > This is done lazily. The SPE save will be done only if the guest has > used SPE since the last preemption or heavyweight exit. > Restore will be > done only on demand, when enabling MSR_SPE in the shadow MSR, > in response > to an SPE fault or mtmsr emulation. > > For SPEFSCR, Linux already switches it on context switch > (non-lazily), so > the only remaining bit is to save it between qemu and the guest. > > Signed-off-by: Liu Yu <yu.liu@xxxxxxxxxxxxx> > Signed-off-by: Scott Wood <scottwood@xxxxxxxxxxxxx> > --- > v5: disable preemption when restoring SPE state > > Saving SPE state is only done from a preempt notifier or vcpu_put(), > where preemption is already disabled. > > The other patches in this series are the same as v4. > > arch/powerpc/include/asm/kvm_host.h | 6 +++ > arch/powerpc/include/asm/reg_booke.h | 1 + > arch/powerpc/kernel/asm-offsets.c | 6 +++ > arch/powerpc/kvm/booke.c | 72 > +++++++++++++++++++++++++++++++++- > arch/powerpc/kvm/booke.h | 18 ++------- > arch/powerpc/kvm/booke_interrupts.S | 40 +++++++++++++++++++ > arch/powerpc/kvm/e500.c | 19 ++++++++- > 7 files changed, 145 insertions(+), 17 deletions(-) > I think the patch miss the bit to handle the case that if guest clear the MSR_SPE. Thanks, Yu -- To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
