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https://github.com/torvalds/linux
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afe7504930
On powerpc, L1 hypervisor takes help of L0 using H_ENTER_NESTED hcall to load L2 guest state in cpu. L1 hypervisor prepares the L2 state in struct hv_guest_state and passes a pointer to it via hcall. Using that pointer, L0 reads/writes that state directly from/to L1 memory. Thus L0 must be aware of hv_guest_state layout of L1. Currently it uses version field to achieve this. i.e. If L0 hv_guest_state.version != L1 hv_guest_state.version, L0 won't allow nested kvm guest. This restriction can be loosened up a bit. L0 can be taught to understand older layout of hv_guest_state, if we restrict the new members to be added only at the end, i.e. we can allow nested guest even when L0 hv_guest_state.version > L1 hv_guest_state.version. Though, the other way around is not possible. Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Reviewed-by: Fabiano Rosas <farosas@linux.ibm.com> Signed-off-by: Paul Mackerras <paulus@ozlabs.org> |
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| .. | ||
| book3s.c | ||
| book3s.h | ||
| book3s_32_mmu.c | ||
| book3s_32_mmu_host.c | ||
| book3s_32_sr.S | ||
| book3s_64_mmu.c | ||
| book3s_64_mmu_host.c | ||
| book3s_64_mmu_hv.c | ||
| book3s_64_mmu_radix.c | ||
| book3s_64_slb.S | ||
| book3s_64_vio.c | ||
| book3s_64_vio_hv.c | ||
| book3s_emulate.c | ||
| book3s_exports.c | ||
| book3s_hv.c | ||
| book3s_hv_builtin.c | ||
| book3s_hv_hmi.c | ||
| book3s_hv_interrupts.S | ||
| book3s_hv_nested.c | ||
| book3s_hv_ras.c | ||
| book3s_hv_rm_mmu.c | ||
| book3s_hv_rm_xics.c | ||
| book3s_hv_rm_xive.c | ||
| book3s_hv_rmhandlers.S | ||
| book3s_hv_tm.c | ||
| book3s_hv_tm_builtin.c | ||
| book3s_hv_uvmem.c | ||
| book3s_interrupts.S | ||
| book3s_mmu_hpte.c | ||
| book3s_paired_singles.c | ||
| book3s_pr.c | ||
| book3s_pr_papr.c | ||
| book3s_rmhandlers.S | ||
| book3s_rtas.c | ||
| book3s_segment.S | ||
| book3s_xics.c | ||
| book3s_xics.h | ||
| book3s_xive.c | ||
| book3s_xive.h | ||
| book3s_xive_native.c | ||
| book3s_xive_template.c | ||
| booke.c | ||
| booke.h | ||
| booke_emulate.c | ||
| booke_interrupts.S | ||
| bookehv_interrupts.S | ||
| e500.c | ||
| e500.h | ||
| e500_emulate.c | ||
| e500_mmu.c | ||
| e500_mmu_host.c | ||
| e500_mmu_host.h | ||
| e500mc.c | ||
| emulate.c | ||
| emulate_loadstore.c | ||
| fpu.S | ||
| irq.h | ||
| Kconfig | ||
| Makefile | ||
| mpic.c | ||
| powerpc.c | ||
| timing.c | ||
| timing.h | ||
| tm.S | ||
| trace.h | ||
| trace_book3s.h | ||
| trace_booke.h | ||
| trace_hv.h | ||
| trace_pr.h | ||