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Re: [Qemu-arm] [PATCH v12 00/10] ARM virt: Initial RAM expansion and ext
Re: [Qemu-arm] [PATCH v12 00/10] ARM virt: Initial RAM expansion and extended memory map
Mon, 4 Mar 2019 18:11:52 +0100
Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.4.0
On 3/4/19 11:13 AM, Eric Auger wrote:
> This series aims to bump the 255GB RAM limit in machvirt and paves the
> way to device memory addition.
> In machvirt versions < 4.0, the initial RAM starts at 1GB and can
> grow up to 255GB. From 256GB onwards we find IO regions such as the
> additional GICv3 RDIST region, high PCIe ECAM region and high PCIe
> MMIO region. The address map was 1TB large. This corresponded to
> the max IPA capacity KVM was able to manage.
> Since 4.20, the host kernel is able to support a larger and dynamic
> IPA range. So the guest physical address can go beyond the 1TB. The
> max GPA size depends on the host kernel configuration and physical CPUs.
> In this series we use this feature and allow the RAM to grow without
> any other limit than the one put by the host kernel.
> The RAM still starts at 1GB. First comes the initial ram (-m) of size
> ram_size and then we provision sufficient space for the looming
> device memory (dimensionned using ,maxmem and slots options).
> IO regions previously located between 256GB and 1TB are moved after
> the RAM. Their offset is dynamically computed, depends on ram_size,
> slots, maxram_size. Size alignment is enforced.
> In case maxmem value is inferior to 255GB, the legacy memory map
> still is used.
> As we keep the initial RAM at 1GB base address, we do not need to do
> invasive changes in the EDK2 FW. It seems nobody is eager to do
> that job at the moment.
> Device memory being put just after the initial RAM, it will be
> possible to get access to this feature while keeping a 1TB address
> Best Regards
> This series can be found at:
> v11 -> v12:
> - collected last Igor's and Richard's R-b's
> - removed the memmap initialization to NULL
I collected all the R-b's I received from Igor and Richard and I removed
the PCDIMM/NVDIMM integration. Please let me know if you have some
remaining comments so that this series hopefully lands in the next release.
> v10 -> v11:
> - remove vms->high_io_base
> - remove RAM_BASE
> - see individual change logs for other adjustments
> v9 -> v10:
> - only the keep the first 10 patches which move to the extended memmap
> - remove the 1GB alignment check on maxram_size
> v8 -> v9:
> - fixed make check SIGSEV
> - fixed TCG issue (restored virt_set_memmap in machvirt_init)
> - removed Igor's R-b on "hw/arm/boot: Expose the PC-DIMM nodes in the DT"
> v7 -> v8:
> - addressed Igor's comments"
> - remove no_extended_memmap knob
> - moved acpi_nvdimm_state into MachineState
> - separate "hw/arm/virt: Check the VCPU PA range in TCG mode" patch
> v6 -> v7:
> - Addressed Peter and Igor comments (exceptions sent my email)
> - Fixed TCG case. Now device memory works also for TCG and vcpu
> pamax is checked
> - See individual logs for more details
> v5 -> v6:
> - mingw compilation issue fix
> - kvm_arm_get_max_vm_phys_shift always returns the number of supported
> IPA bits
> - new patch "hw/arm/virt: Rename highmem IO regions" that eases the review
> of "hw/arm/virt: Split the memory map description"
> - "hw/arm/virt: Move memory map initialization into machvirt_init"
> squashed into the previous patch
> - change alignment of IO regions beyond the RAM so that it matches their
> v4 -> v5:
> - change in the memory map
> - see individual logs
> 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
> - was "[RFC 0/6] KVM/ARM: Dynamic and larger GPA size"
> - was "[RFC 0/5] ARM virt: Support PC-DIMM at 2TB"
> Eric Auger (9):
> hw/arm/virt: Rename highmem IO regions
> hw/arm/virt: Split the memory map description
> hw/boards: Add a MachineState parameter to kvm_type callback
> kvm: add kvm_arm_get_max_vm_ipa_size
> vl: Set machine ram_size, maxram_size and ram_slots earlier
> hw/arm/virt: Dynamic memory map depending on RAM requirements
> hw/arm/virt: Implement kvm_type function for 4.0 machine
> hw/arm/virt: Check the VCPU PA range in TCG mode
> hw/arm/virt: Bump the 255GB initial RAM limit
> Shameer Kolothum (1):
> hw/arm/boot: introduce fdt_add_memory_node helper
> accel/kvm/kvm-all.c | 2 +-
> hw/arm/boot.c | 54 +++++++----
> hw/arm/virt-acpi-build.c | 10 +-
> hw/arm/virt.c | 196 +++++++++++++++++++++++++++++++--------
> hw/ppc/mac_newworld.c | 3 +-
> hw/ppc/mac_oldworld.c | 2 +-
> hw/ppc/spapr.c | 2 +-
> include/hw/arm/virt.h | 16 +++-
> include/hw/boards.h | 5 +-
> target/arm/kvm.c | 10 ++
> target/arm/kvm_arm.h | 13 +++
> vl.c | 6 +-
> 12 files changed, 241 insertions(+), 78 deletions(-)
- [Qemu-arm] [PATCH v12 04/10] hw/boards: Add a MachineState parameter to kvm_type callback, (continued)
- [Qemu-arm] [PATCH v12 04/10] hw/boards: Add a MachineState parameter to kvm_type callback, Eric Auger, 2019/03/04
- [Qemu-arm] [PATCH v12 03/10] hw/arm/virt: Split the memory map description, Eric Auger, 2019/03/04
- [Qemu-arm] [PATCH v12 05/10] kvm: add kvm_arm_get_max_vm_ipa_size, Eric Auger, 2019/03/04
- [Qemu-arm] [PATCH v12 06/10] vl: Set machine ram_size, maxram_size and ram_slots earlier, Eric Auger, 2019/03/04
- [Qemu-arm] [PATCH v12 07/10] hw/arm/virt: Dynamic memory map depending on RAM requirements, Eric Auger, 2019/03/04
- [Qemu-arm] [PATCH v12 08/10] hw/arm/virt: Implement kvm_type function for 4.0 machine, Eric Auger, 2019/03/04
- [Qemu-arm] [PATCH v12 09/10] hw/arm/virt: Check the VCPU PA range in TCG mode, Eric Auger, 2019/03/04
- [Qemu-arm] [PATCH v12 10/10] hw/arm/virt: Bump the 255GB initial RAM limit, Eric Auger, 2019/03/04
- [Qemu-arm] [PATCH v12 02/10] hw/arm/virt: Rename highmem IO regions, Eric Auger, 2019/03/04
- [Qemu-arm] [PATCH v12 01/10] hw/arm/boot: introduce fdt_add_memory_node helper, Eric Auger, 2019/03/04
- Re: [Qemu-arm] [PATCH v12 00/10] ARM virt: Initial RAM expansion and extended memory map,
Auger Eric <=