This series aims at supporting PCDIMM/NVDIMM intantiation in machvirt at 2TB guest physical address.
This is achieved in 3 steps: 1) support more than 40b IPA/GPA 2) support PCDIMM instantiation 3) support NVDIMM instantiation This series reuses/rebases patches initially submitted by Shameer in [1] and Kwangwoo in [2]. I put all parts all together for consistency and due to dependencies however as soon as the kernel dependency is resolved we can consider upstreaming them separately. Support more than 40b IPA/GPA [ patches 1 - 5 ] ----------------------------------------------- was "[RFC 0/6] KVM/ARM: Dynamic and larger GPA size" At the moment the guest physical address space is limited to 40b due to KVM limitations. [0] bumps this limitation and allows to create a VM with up to 52b GPA address space. With this series, QEMU creates a virt VM with the max IPA range reported by the host kernel or 40b by default. This choice can be overriden by using the -machine kvm-type=<bits> option with bits within [40, 52]. If <bits> are not supported by the host, the legacy 40b value is used. Currently the EDK2 FW also hardcodes the max number of GPA bits to 40. This will need to be fixed. PCDIMM Support [ patches 6 - 11 ] --------------------------------- was "[RFC 0/5] ARM virt: Support PC-DIMM at 2TB" We instantiate the device_memory at 2TB. Using it obviously requires at least 42b of IPA/GPA. While its max capacity is currently limited to 2TB, the actual size depends on the initial guest RAM size and maxmem parameter. Actual hot-plug and hot-unplug of PC-DIMM is not suported due to lack of support of those features in baremetal. NVDIMM support [ patches 12 - 15 ] ---------------------------------- Once the memory hotplug framework is in place it is fairly straightforward to add support for NVDIMM. the machine "nvdimm" option turns the capability on. Best Regards Eric References: [0] [PATCH v3 00/20] arm64: Dynamic & 52bit IPA support https://www.spinics.net/lists/kernel/msg2841735.html [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 VM was created. - Migration tests were performed between kernel supporting the feature and destination kernel not suporting it - test with ACPI: to overcome the limitation of EDK2 FW, virt memory map was hacked to move the device memory below 1TB. This series can be found at: https://github.com/eauger/qemu/tree/v2.12.0-dimm-2tb-v3 History: 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 (9): 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 hw/arm/virt: support kvm_type property hw/arm/virt: handle max_vm_phys_shift conflicts on migration 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/virt: Add memory hotplug framework hw/arm/boot: introduce fdt_add_memory_node helper 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 | 123 +++++++-- hw/arm/virt-acpi-build.c | 10 + hw/arm/virt.c | 330 ++++++++++++++++++++++--- hw/i386/acpi-build.c | 49 ---- hw/i386/pc_piix.c | 8 +- hw/i386/pc_q35.c | 8 +- hw/ppc/mac_newworld.c | 2 +- hw/ppc/mac_oldworld.c | 2 +- hw/ppc/spapr.c | 2 +- include/hw/acpi/aml-build.h | 3 + include/hw/arm/arm.h | 2 + include/hw/arm/virt.h | 7 + include/hw/boards.h | 2 +- include/hw/mem/nvdimm.h | 12 + include/standard-headers/linux/virtio_config.h | 16 +- linux-headers/asm-mips/unistd.h | 18 +- linux-headers/asm-powerpc/kvm.h | 1 + linux-headers/linux/kvm.h | 16 ++ target/arm/kvm.c | 9 + target/arm/kvm_arm.h | 16 ++ 24 files changed, 597 insertions(+), 124 deletions(-) -- 2.5.5