This series aims at supporting PC-DIMM in machvirt. The device_memory is set at 2TB. While its max capacity is currently limited to 2TB, the actual size depends on the initial guest RAM size and maxmem parameter. Using memory beyond 2TB is possible if KVM, the FW and the guest supports up to 42 bit IPA/GPA.
Actual hot-plug and hot-unplug of PC-DIMM is not suported due to lack of support of those features in baremetal. This series reuses/rebases patches initially submitted by Shameer in [1] and Kwangwoo in [2]. [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 It has the following dependencies: [3] [RFC 0/6] KVM/ARM: Dynamic and larger GPA size https://lists.gnu.org/archive/html/qemu-devel/2018-06/msg05759.htm which itself depends on the kernel series [4] [4] [PATCH v2 00/17] kvm: arm64: Dynamic & 52bit IPA support https://lkml.org/lkml/2018/3/27/437 For testing, use my kernel branch: https://github.com/eauger/linux/tree/4.16.0-rc3-Suzuki-52b-IPA-v2 Best Regards Eric This QEMU series can be found at: https://github.com/eauger/qemu/tree/v2.12.0-pcdimm-2tb-rfc Tests: - On Cavium Gigabyte, a 48b VM was created and PC-DIMM slots were successfully added and recognized by the guest. EDK2 has a fixed limit at 40b PA so this was tested without FW. NUMA config has not been tested yet. Eric Auger (1): hw/arm/virt: Allocate device_memory Shameer Kolothum (4): hw/arm/virt: Add pc-dimm mem 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 default-configs/arm-softmmu.mak | 2 + hw/arm/boot.c | 110 ++++++++++++++++++++-------- hw/arm/virt-acpi-build.c | 34 +++++++++ hw/arm/virt.c | 158 ++++++++++++++++++++++++++++++++-------- include/hw/arm/arm.h | 2 + include/hw/arm/virt.h | 1 + 6 files changed, 247 insertions(+), 60 deletions(-) -- 2.5.5
