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5f7d861e65
Add support for reporting Hostwide state counters for nested KVM pseries guests running with 'cap-nested-papr' on Qemu-TCG acting as L0-hypervisor. The Hostwide state counters are statistics about state that L0-hypervisor maintains for the L2-guests and represent the state of all L2-guests, not just a specific one. These stats counters are exposed to L1-Hypervisor by the L0-Hypervisor via a new bit-flag named 'getHostWideState' for the H_GUEST_GET_STATE hcall which is documented at [1]. Once this flag is set the hcall should populate the Guest-State-Elements in the requested GSB with the stat counter values. Currently following five counters are supported: * l0_guest_heap_size_inuse * l0_guest_heap_size_max * l0_guest_pagetable_size_inuse * l0_guest_pagetable_size_max * l0_guest_pagetable_reclaimed At the moment '0' is being reported for all these counters as these counters doesn't align with how L0-Qemu manages Guest memory. The patch implements support for these counters by adding new members to the 'struct SpaprMachineStateNested'. These new members are then plugged into the existing 'guest_state_element_types[]' with the help of a new macro 'GSBE_NESTED_MACHINE_DW' together with a new helper 'get_machine_ptr()'. guest_state_request_check() is updated to ensure correctness of the requested GSB and finally h_guest_getset_state() is updated to handle the newly introduced flag 'GUEST_STATE_REQUEST_HOST_WIDE'. This patch is tested with the proposed linux-kernel implementation to expose these stat-counter as perf-events at [2]. [1] https://lore.kernel.org/all/20241222140247.174998-2-vaibhav@linux.ibm.com [2] https://lore.kernel.org/all/20241222140247.174998-1-vaibhav@linux.ibm.com Signed-off-by: Vaibhav Jain <vaibhav@linux.ibm.com> Reviewed-by: Harsh Prateek Bora <harshpb@linux.ibm.com> Message-ID: <20250221155449.530645-1-vaibhav@linux.ibm.com> Signed-off-by: Nicholas Piggin <npiggin@gmail.com> |
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| .. | ||
| fdt.h | ||
| mac_dbdma.h | ||
| openpic.h | ||
| openpic_kvm.h | ||
| pnv.h | ||
| pnv_adu.h | ||
| pnv_chip.h | ||
| pnv_chiptod.h | ||
| pnv_core.h | ||
| pnv_homer.h | ||
| pnv_i2c.h | ||
| pnv_lpc.h | ||
| pnv_n1_chiplet.h | ||
| pnv_nest_pervasive.h | ||
| pnv_occ.h | ||
| pnv_pnor.h | ||
| pnv_psi.h | ||
| pnv_sbe.h | ||
| pnv_xive.h | ||
| pnv_xscom.h | ||
| ppc.h | ||
| ppc4xx.h | ||
| ppc_e500.h | ||
| spapr.h | ||
| spapr_cpu_core.h | ||
| spapr_drc.h | ||
| spapr_irq.h | ||
| spapr_nested.h | ||
| spapr_numa.h | ||
| spapr_nvdimm.h | ||
| spapr_ovec.h | ||
| spapr_tpm_proxy.h | ||
| spapr_vio.h | ||
| spapr_xive.h | ||
| vof.h | ||
| xics.h | ||
| xics_spapr.h | ||
| xive.h | ||
| xive2.h | ||
| xive2_regs.h | ||
| xive_regs.h | ||