On Mon, 2019-05-06 at 16:20 +1000, David Gibson wrote: > On Fri, May 03, 2019 at 03:53:03PM +1000, Suraj Jitindar Singh wrote: > > This patch series adds the necessary parts so that a tcg guest is > > able to use > > kvm facilities. That is a tcg guest can boot its own kvm guests. > > The topic line is a bit hard to parse. IIUC there are basically two > things in this series: > > 1) Implement / fix TCG emulation of TCG hypervisor facilities, so > that > a TCG powernv machine can use them to run KVM guests. > > 2) Have the pseries machine under TCG implement the paravirtualized > interfaces to allow nested virtualizationm therefore allowing TCG > pseries machines to run KVM guests > > Is that right?
That is correct. Patches 1-7 achieve 1) TCG emulation of hypervisor facilities Patches 8-13 achieve 2) emulation of paravirtualised KVM for pseries guest > > > The main requirements for this were a few registers and > > instructions as well as > > some hcalls and the addition of partition scoped translation in the > > radix mmu > > emulation. > > > > This can be used to boot a kvm guest under a pseries tcg guest: > > Use power9_v2.2 cpu and add -machine cap-nested-hv=on for the first > > guest. > > Then inside that guest boot a kvm guest as normal. > > This takes advantage of the new hcalls with qemu emulating them as > > a normal > > hypervisor would on a real machine. > > > > This can also be used to boot a kvm guest under a powernv tcg > > guest: > > Use any power9 cpu type. > > This takes advantage of the new hv register access added. > > Note that for powernv there is no xive interrupt excalation for KVM > > which means > > that while the guest will boot, it won't receive any interrupts. > > > > Suraj Jitindar Singh (13): > > target/ppc: Implement the VTB for HV access > > target/ppc: Work [S]PURR implementation and add HV support > > target/ppc: Add SPR ASDR > > target/ppc: Add SPR TBU40 > > target/ppc: Add privileged message send facilities > > target/ppc: Enforce that the root page directory size must be at > > least > > 5 > > target/ppc: Handle partition scoped radix tree translation > > target/ppc: Implement hcall H_SET_PARTITION_TABLE > > target/ppc: Implement hcall H_ENTER_NESTED > > target/ppc: Implement hcall H_TLB_INVALIDATE > > target/ppc: Implement hcall H_COPY_TOFROM_GUEST > > target/ppc: Introduce POWER9 DD2.2 cpu type > > target/ppc: Enable SPAPR_CAP_NESTED_KVM_HV under tcg > > > > hw/ppc/ppc.c | 46 ++++- > > hw/ppc/spapr_caps.c | 22 ++- > > hw/ppc/spapr_cpu_core.c | 1 + > > hw/ppc/spapr_hcall.c | 409 > > +++++++++++++++++++++++++++++++++++++++ > > include/hw/ppc/ppc.h | 4 +- > > include/hw/ppc/spapr.h | 7 +- > > linux-user/ppc/cpu_loop.c | 5 + > > target/ppc/cpu-models.c | 2 + > > target/ppc/cpu-models.h | 1 + > > target/ppc/cpu.h | 70 +++++++ > > target/ppc/excp_helper.c | 79 +++++++- > > target/ppc/helper.h | 9 + > > target/ppc/misc_helper.c | 46 +++++ > > target/ppc/mmu-radix64.c | 412 > > ++++++++++++++++++++++++++++------------ > > target/ppc/mmu-radix64.h | 4 + > > target/ppc/timebase_helper.c | 20 ++ > > target/ppc/translate.c | 28 +++ > > target/ppc/translate_init.inc.c | 107 +++++++++-- > > 18 files changed, 1115 insertions(+), 157 deletions(-) > > > >
