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Re: [Qemu-arm] [RFC v3 00/15] ARM virt: PCDIMM/NVDIMM at 2TB
From: |
Igor Mammedov |
Subject: |
Re: [Qemu-arm] [RFC v3 00/15] ARM virt: PCDIMM/NVDIMM at 2TB |
Date: |
Wed, 18 Jul 2018 16:08:32 +0200 |
On Tue, 3 Jul 2018 09:19:43 +0200
Eric Auger <address@hidden> wrote:
> 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
will it work for TCG as well?
/important from make check pov and maybe in cases when there is no ARM system
available to test/play with the feature/
> 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(-)
>
- [Qemu-arm] [RFC v3 15/15] hw/arm/virt: Add nvdimm and nvdimm-persistence options, (continued)
- [Qemu-arm] [RFC v3 15/15] hw/arm/virt: Add nvdimm and nvdimm-persistence options, Eric Auger, 2018/07/03
- [Qemu-arm] [RFC v3 01/15] linux-headers: header update for KVM/ARM KVM_ARM_GET_MAX_VM_PHYS_SHIFT, Eric Auger, 2018/07/03
- [Qemu-arm] [RFC v3 10/15] acpi: move build_srat_hotpluggable_memory to generic ACPI source, Eric Auger, 2018/07/03
- [Qemu-arm] [RFC v3 12/15] nvdimm: use configurable ACPI IO base and size, Eric Auger, 2018/07/03
- [Qemu-arm] [RFC v3 13/15] hw/arm/virt: Add nvdimm hot-plug infrastructure, Eric Auger, 2018/07/03
- [Qemu-arm] [RFC v3 05/15] hw/arm/virt: handle max_vm_phys_shift conflicts on migration, Eric Auger, 2018/07/03
Re: [Qemu-arm] [RFC v3 00/15] ARM virt: PCDIMM/NVDIMM at 2TB,
Igor Mammedov <=