This series aims at supporting PCDIMM/NVDIMM intantiation in mach-virt at 2TB guest physical address.
This is not material for 3.1. Although there is another implementation alternative under discussion on the ML, consisting in having a single device memory region with a floating base, I continue to maintain this series until all dependencies get resolved and this other solution gets fully prototyped. Here we consider that the top of the address map is the top of the device memory starting at 2TB and whose size is defined by maxram_size - ram_size. We create a KVM machine with an IPA range including the top of the device memory. Suzuki's kernel series [0] allows that settings. In can be found on kvmarm/next branch and this branch was used for testing. Then the series adds the device memory framework to mach-virt and brings support for PC-DIMM and NV-DIMM frontend devices. This series reuses/rebases patches initially submitted by Shameer in [1] and Kwangwoo in [2] for the PC-DIMM and NV-DIMM parts. Notes: - The EDK2 FW still hardcodes the max PA size to 40 bits - The TCG machine limits the PA according to the id_aa64mmfr0 register PARange field. At the moment the PARange is hardcoded to 40bits for the A53 CPU and to 44 bits for the A57. So only an A57 based machine would be able to expose device memory. This consisteny check is not yet handled. We could think about adding the support for the phys-bit CPU option to set the id_aa64mmfr0.parange. The series includes "hw/arm/boot: introduce fdt_add_memory_node helper" which was sent separately. Best Regards Eric References: [0] [PATCH v6 00/18] arm64: Dynamic & 52bit IPA support https://lkml.org/lkml/2018/9/26/936 kvmarm next branch can be used for testing [1] [RFC v2 0/6] hw/arm: Add support for non-contiguous iova regions http://patchwork.ozlabs.org/cover/914694/ [2] [RFC PATCH 0/3] add nvdimm support on AArch64 virt platform https://lists.gnu.org/archive/html/qemu-devel/2016-07/msg04599.html Tests: - On Cavium Gigabyte, a 48b KVM accelerated VM was created. - PC-DIMM was tested with memtester - NV-DIMM was tested with ndctl and an ext4 DAX FS was installed on guest This series can be found at: https://github.com/eauger/qemu/tree/v3.0.0-dimm-2tb-v4 History: v3 -> v4: - rebase on David's "pc-dimm: next bunch of cleanups" and "pc-dimm: pre_plug "slot" and "addr" assignment" - kvm-type option not used anymore. We directly use maxram_size and ram_size machine fields to compute the MAX IPA range. Migration is naturally handled as CLI option are kept between source and destination. This was suggested by David. - device_memory_start and device_memory_size not stored anymore in vms->bootinfo - I did not take into account 2 Igor's comments: the one related to the refactoring of arm_load_dtb and the one related to the generation of the dtb after system_reset which would contain nodes of hotplugged devices (we do not support hotplug at this stage) - check the end-user does not attempt to hotplug a device - addition of "vl: Set machine ram_size, maxram_size and ram_slots earlier" v2 -> v3: - fix pc_q35 and pc_piix compilation error - kwangwoo's email being not valid anymore, remove his address v1 -> v2: - kvm_get_max_vm_phys_shift moved in arch specific file - addition of NVDIMM part - single series - rebase on David's refactoring v1: - was "[RFC 0/6] KVM/ARM: Dynamic and larger GPA size" - was "[RFC 0/5] ARM virt: Support PC-DIMM at 2TB" Best Regards Eric Eric Auger (10): linux-headers: header update for KVM/ARM KVM_ARM_GET_MAX_VM_PHYS_SHIFT hw/boards: Add a MachineState parameter to kvm_type callback kvm: add kvm_arm_get_max_vm_phys_shift vl: Set machine ram_size, maxram_size and ram_slots earlier hw/arm/virt: Add virt-3.2 machine type hw/arm/virt: Implement kvm_type function for 3.2 machine hw/arm/virt: Allocate device_memory acpi: move build_srat_hotpluggable_memory to generic ACPI source hw/arm/boot: Expose the pmem nodes in the DT hw/arm/virt: Add nvdimm and nvdimm-persistence options Kwangwoo Lee (2): nvdimm: use configurable ACPI IO base and size hw/arm/virt: Add nvdimm hot-plug infrastructure Shameer Kolothum (4): hw/arm/boot: introduce fdt_add_memory_node helper hw/arm/virt: Add memory hotplug framework hw/arm/boot: Expose the PC-DIMM nodes in the DT hw/arm/virt-acpi-build: Add PC-DIMM in SRAT accel/kvm/kvm-all.c | 2 +- default-configs/arm-softmmu.mak | 4 + hw/acpi/aml-build.c | 51 ++++++ hw/acpi/nvdimm.c | 28 ++- hw/arm/boot.c | 120 ++++++++++--- hw/arm/virt-acpi-build.c | 10 ++ hw/arm/virt.c | 302 ++++++++++++++++++++++++++++---- hw/i386/pc_piix.c | 8 +- hw/i386/pc_q35.c | 8 +- hw/ppc/mac_newworld.c | 3 +- hw/ppc/mac_oldworld.c | 2 +- hw/ppc/spapr.c | 2 +- include/hw/acpi/aml-build.h | 3 + include/hw/arm/virt.h | 5 + include/hw/boards.h | 2 +- include/hw/mem/nvdimm.h | 12 ++ linux-headers/linux/kvm.h | 10 ++ target/arm/kvm.c | 8 + target/arm/kvm_arm.h | 16 ++ vl.c | 6 +- 20 files changed, 530 insertions(+), 72 deletions(-) -- 2.17.1
