| Message ID | 20210822144441.1290891-1-maz@kernel.org |
|---|---|
| Headers | show |
| Series | target/arm: Reduced-IPA space and highmem=off fixes | expand |
On 2021-08-22 15:44, Marc Zyngier wrote: > With the availability of a fruity range of arm64 systems, it becomes > obvious that QEMU doesn't deal very well with limited IPA ranges when > used as a front-end for KVM. > > This short series aims at making usable on such systems: > - the first patch makes the creation of a scratch VM IPA-limit aware > - the second one actually removes the highmem devices from the > computed IPA range when highmem=off > - the last one addresses an imprecision in the documentation for the > highmem option > > This has been tested on an M1-based Mac-mini running Linux v5.14-rc6. I realise I haven't been very clear in my description of the above. With this series, using 'highmem=off' results in a usable VM, while sticking to the default 'highmem=on' still generates an error. M.
On Sun, 22 Aug 2021 at 15:45, Marc Zyngier <maz@kernel.org> wrote: > > With the availability of a fruity range of arm64 systems, it becomes > obvious that QEMU doesn't deal very well with limited IPA ranges when > used as a front-end for KVM. > > This short series aims at making usable on such systems: > - the first patch makes the creation of a scratch VM IPA-limit aware > - the second one actually removes the highmem devices from the > computed IPA range when highmem=off > - the last one addresses an imprecision in the documentation for the > highmem option > > This has been tested on an M1-based Mac-mini running Linux v5.14-rc6. > > Marc Zyngier (3): > hw/arm/virt: KVM: Probe for KVM_CAP_ARM_VM_IPA_SIZE when creating > scratch VM > hw/arm/virt: Honor highmem setting when computing highest_gpa > docs/system/arm/virt: Fix documentation for the 'highmem' option I've applied patch 1 to target-arm.next; thanks. -- PMM
With the availability of a fruity range of arm64 systems, it becomes obvious that QEMU doesn't deal very well with limited IPA ranges when used as a front-end for KVM. This short series aims at making usable on such systems: - the first patch makes the creation of a scratch VM IPA-limit aware - the second one actually removes the highmem devices from the computed IPA range when highmem=off - the last one addresses an imprecision in the documentation for the highmem option This has been tested on an M1-based Mac-mini running Linux v5.14-rc6. Marc Zyngier (3): hw/arm/virt: KVM: Probe for KVM_CAP_ARM_VM_IPA_SIZE when creating scratch VM hw/arm/virt: Honor highmem setting when computing highest_gpa docs/system/arm/virt: Fix documentation for the 'highmem' option docs/system/arm/virt.rst | 6 +++--- hw/arm/virt.c | 10 +++++++--- target/arm/kvm.c | 7 ++++++- 3 files changed, 16 insertions(+), 7 deletions(-)