Re: linux-next: build failure after merge of the kvm-x86 tree

[Oliver Upton]

Hey,

On Wed, Sep 16, 2026 at 07:04:49AM -0700, Sean Christopherson wrote:
> On Wed, Sep 16, 2026, Mark Brown wrote:
> > Hi all,
> > 
> > After merging the kvm-x86 tree, today's linux-next build
> > (arm64 kselftest) failed like this:
> > 
> > arm64/vgic_its_save.c: In function 'alloc_64k':
> > arm64/vgic_its_save.c:289:21: error: too many arguments to function
> > 'vm_phy_pages_alloc'
> >   289 |         gpa_t gpa = vm_phy_pages_alloc(vm, nr * pages_per_64k, gpa_base,
> >       |                     ^~~~~~~~~~~~~~~~~~
> > In file included from arm64/vgic_its_save.c:24:
> > include/kvm_util.h:1062:21: note: declared here
> >  1062 | static inline gpa_t vm_phy_pages_alloc(struct kvm_vm *vm, size_t nr_pages,
> >       |                     ^~~~~~~~~~~~~~~~~~
> > 
> > Caused by commits
> > 
> >   36a062568ea80 (KVM: selftests: Take the memory region type, not memslot, in page allocators)
> >   6c28a0d7cf125 (KVM: selftests: Automatically pick min_gpa for allocations based on region type)
> 
> In case anyone cares, I'm woefully behind on sending "thanks".  These came from
> the prep series for enabling PPC selftests.
> 
> https://lore.kernel.org/all/20260826230511.972824-1-seanjc@xxxxxxxxxx
> 
> > interacting with commit
> > 
> >   6f182db39fb00 (KVM: arm64: selftests: Add ITS table save tests)
> > 
> > from the kvm-arm tree.  I have applied the fixup below and can carry as
> > needed:
> 
> Given that this is in "fixes", I assume the new test will land in 7.3?  If so,
> this is mostly my problem to deal with when sending Paolo the selftests pull
> (which, FWIW, I'm hoping to do this week so that it can be used as the base for
> PPC selftests support). 

Yeah, aim here is to have the selftest go with the fix which I'll send to
Paolo this week. Sorry for the churn.

> diff --git a/tools/testing/selftests/kvm/arm64/vgic_its_save.c b/tools/testing/selftests/kvm/arm64/vgic_its_save.c
> index 864da01539f3..fae8a6c45f88 100644
> --- a/tools/testing/selftests/kvm/arm64/vgic_its_save.c
> +++ b/tools/testing/selftests/kvm/arm64/vgic_its_save.c
> @@ -279,15 +279,15 @@ static void setup_memslot(size_t sz)
>  	size_t pages = sz / vm->page_size;
>  
>  	gpa_base = ((vm_compute_max_gfn(vm) + 1) * vm->page_size) - sz;
> -	vm_userspace_mem_region_add(vm, VM_MEM_SRC_ANONYMOUS, gpa_base,
> -				    TEST_MEMSLOT_INDEX, pages, 0);
> +	vm_override_mem_region(vm, MEM_REGION_TEST_EXTRA, VM_MEM_SRC_ANONYMOUS,
> +			       gpa_base, TEST_MEMSLOT_INDEX, pages);
>  }
>  
>  static gpa_t alloc_64k(size_t nr)
>  {
>  	size_t pages_per_64k = vm_calc_num_guest_pages(vm->mode, SZ_64K);
> -	gpa_t gpa = vm_phy_pages_alloc(vm, nr * pages_per_64k, gpa_base,
> -				       TEST_MEMSLOT_INDEX);
> +	gpa_t gpa = vm_phy_pages_alloc(vm, nr * pages_per_64k,
> +				       MEM_REGION_TEST_EXTRA);
>  
>  	TEST_ASSERT(IS_ALIGNED(gpa, SZ_64K),
>  		    "Allocation at 0x%lx is not 64K aligned, GITS_BASER cannot address it",

LGTM

Thanks,
Oliver