[v3] target/s390x: Allow 2G hugepages guest backing

[PATCH v3 0/1] target/s390x: Allow 2G hugepages guest backing

Claudio Imbrenda posted 1 patch 1 week, 5 days ago

Diff against v2
Download series mbox

Patches applied successfully (tree, apply log)
git fetch https://github.com/patchew-project/qemu tags/patchew/20260805103728.97602-1-imbrenda@linux.ibm.com

Maintainers: Richard Henderson <richard.henderson@linaro.org>, Ilya Leoshkevich <iii@linux.ibm.com>, David Hildenbrand <david@kernel.org>, Cornelia Huck <cohuck@redhat.com>, Eric Farman <farman@linux.ibm.com>, Matthew Rosato <mjrosato@linux.ibm.com>, Halil Pasic <pasic@linux.ibm.com>, Christian Borntraeger <borntraeger@linux.ibm.com>

target/s390x/diag.c          |  2 +-
target/s390x/kvm/kvm.c       | 36 +++++++++++++++++-------------------
target/s390x/kvm/kvm_s390x.h |  2 +-
target/s390x/kvm/stubs.c     |  2 +-
4 files changed, 20 insertions(+), 22 deletions(-)

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[PATCH v3 0/1] target/s390x: Allow 2G hugepages guest backing

Posted by Claudio Imbrenda 1 week, 5 days ago

Allow mapping guest with 2G hugepages on hosts that support it.
    
Add new helper functions to check whether hpages are in effect, and
which size.

v2->v3:
* Remove dead code introduced in the previous version.
* Factor out the capability enablement and error reporting to avoid
  duplicating code and error messages.
* Optimize the control flow and bring it back in line with the previous
  behaviour regarding page sizes, i.e. assuming that if the page size
  is neither 4K nor 1M, then it must be 2G.

v1->v2:
* Rename the global variable to cap_hpage
* Use different values of cap_hpage to distinguish between hpage sizes
* Add wrappers to test for specific hpage sizes

Claudio Imbrenda (1):
  target/s390x: Allow 2G hugepages guest backing

 target/s390x/diag.c          |  2 +-
 target/s390x/kvm/kvm.c       | 36 +++++++++++++++++-------------------
 target/s390x/kvm/kvm_s390x.h |  2 +-
 target/s390x/kvm/stubs.c     |  2 +-
 4 files changed, 20 insertions(+), 22 deletions(-)

-- 
2.55.0

Re: [PATCH v3 0/1] target/s390x: Allow 2G hugepages guest backing

Posted by Eric Farman 1 week ago


On 8/5/26 6:37 AM, Claudio Imbrenda wrote:
> Allow mapping guest with 2G hugepages on hosts that support it.
>      
> Add new helper functions to check whether hpages are in effect, and
> which size.
> 
> v2->v3:
> * Remove dead code introduced in the previous version.
> * Factor out the capability enablement and error reporting to avoid
>    duplicating code and error messages.
> * Optimize the control flow and bring it back in line with the previous
>    behaviour regarding page sizes, i.e. assuming that if the page size
>    is neither 4K nor 1M, then it must be 2G.
> 
> v1->v2:
> * Rename the global variable to cap_hpage
> * Use different values of cap_hpage to distinguish between hpage sizes
> * Add wrappers to test for specific hpage sizes
> 
> Claudio Imbrenda (1):
>    target/s390x: Allow 2G hugepages guest backing

Thanks! Applied for 11.2

> 
>   target/s390x/diag.c          |  2 +-
>   target/s390x/kvm/kvm.c       | 36 +++++++++++++++++-------------------
>   target/s390x/kvm/kvm_s390x.h |  2 +-
>   target/s390x/kvm/stubs.c     |  2 +-
>   4 files changed, 20 insertions(+), 22 deletions(-)
>