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[4/4] KVM: selftests: Allocate ucall pool from MEM_REGION_DATA

Message ID 20221207214809.489070-5-oliver.upton@linux.dev
State New
Headers
Series [1/4] KVM: selftests: Fix build due to ucall_uninit() removal |

Commit Message

Oliver Upton Dec. 7, 2022, 9:48 p.m. UTC 
  MEM_REGION_TEST_DATA is meant to hold data explicitly used by a
selftest, not implicit allocations due to the selftests infrastructure.
Allocate the ucall pool from MEM_REGION_DATA much like the rest of the
selftests library allocations.

Fixes: 426729b2cf2e ("KVM: selftests: Add ucall pool based implementation")
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
---
 tools/testing/selftests/kvm/lib/ucall_common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Sean Christopherson Dec. 7, 2022, 11:44 p.m. UTC | #1 
On Wed, Dec 07, 2022, Oliver Upton wrote:
> MEM_REGION_TEST_DATA is meant to hold data explicitly used by a
> selftest, not implicit allocations due to the selftests infrastructure.
> Allocate the ucall pool from MEM_REGION_DATA much like the rest of the
> selftests library allocations.
> 
> Fixes: 426729b2cf2e ("KVM: selftests: Add ucall pool based implementation")

Not that it really matters because no one will backport this verbatim, but this
is the wrong commit to blame.  As of commit 426729b2cf2e, MEM_REGION_DATA does not
exist.  And similarly, the common ucall code didn't exist when Ricardo's series
introduced MEM_REGION_DATA.

  $ git show 426729b2cf2e:tools/testing/selftests/kvm/include/kvm_util_base.h | grep MEM_REGION_DATA
  $ git show 290c5b54012b7:tools/testing/selftests/kvm/lib/ucall_common.c
  fatal: path 'tools/testing/selftests/kvm/lib/ucall_common.c' exists on disk, but not in '290c5b54012b7'

The commit where the two collided is:

Fixes: cc7544101eec ("Merge tag 'kvmarm-6.2' of https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD")

> Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
> ---

Fixes nit aside,

Reviewed-by: Sean Christopherson <seanjc@google.com>
Oliver Upton Dec. 7, 2022, 11:56 p.m. UTC | #2 
On Wed, Dec 07, 2022 at 11:44:50PM +0000, Sean Christopherson wrote:
> On Wed, Dec 07, 2022, Oliver Upton wrote:
> > MEM_REGION_TEST_DATA is meant to hold data explicitly used by a
> > selftest, not implicit allocations due to the selftests infrastructure.
> > Allocate the ucall pool from MEM_REGION_DATA much like the rest of the
> > selftests library allocations.
> > 
> > Fixes: 426729b2cf2e ("KVM: selftests: Add ucall pool based implementation")
> 
> Not that it really matters because no one will backport this verbatim, but this
> is the wrong commit to blame.  As of commit 426729b2cf2e, MEM_REGION_DATA does not
> exist.  And similarly, the common ucall code didn't exist when Ricardo's series
> introduced MEM_REGION_DATA.
> 
>   $ git show 426729b2cf2e:tools/testing/selftests/kvm/include/kvm_util_base.h | grep MEM_REGION_DATA
>   $ git show 290c5b54012b7:tools/testing/selftests/kvm/lib/ucall_common.c
>   fatal: path 'tools/testing/selftests/kvm/lib/ucall_common.c' exists on disk, but not in '290c5b54012b7'
> 
> The commit where the two collided is:
> 
> Fixes: cc7544101eec ("Merge tag 'kvmarm-6.2' of https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm into HEAD")

Yeah, this Fixes is garbage, apologies.

I imagine Paolo is going to squash some things into the kvmarm merge, so
the Fixes tag ought to be dropped altogether.

> > Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
> > ---
> 
> Fixes nit aside,
> 
> Reviewed-by: Sean Christopherson <seanjc@google.com>

Thanks!

--
Best,
Oliver
diff mbox series

Patch

diff --git a/tools/testing/selftests/kvm/lib/ucall_common.c b/tools/testing/selftests/kvm/lib/ucall_common.c
index 820ce6c82829..0cc0971ce60e 100644
--- a/tools/testing/selftests/kvm/lib/ucall_common.c
+++ b/tools/testing/selftests/kvm/lib/ucall_common.c
@@ -22,7 +22,7 @@  void ucall_init(struct kvm_vm *vm, vm_paddr_t mmio_gpa)
 	vm_vaddr_t vaddr;
 	int i;
 
-	vaddr = vm_vaddr_alloc(vm, sizeof(*hdr), KVM_UTIL_MIN_VADDR);
+	vaddr = __vm_vaddr_alloc(vm, sizeof(*hdr), KVM_UTIL_MIN_VADDR, MEM_REGION_DATA);
 	hdr = (struct ucall_header *)addr_gva2hva(vm, vaddr);
 	memset(hdr, 0, sizeof(*hdr));