[linux-next:master 5532/8449] arch/arm64/kvm/vgic/vgic-v5-tables.c:962:34: sparse: sparse: Using plain integer as NULL pointer

[linux-next:master 5532/8449] arch/arm64/kvm/vgic/vgic-v5-tables.c:962:34: sparse: sparse: Using plain integer as NULL pointer

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   3f2425f5b5bbbdd991ca9cdfd5502e68d8895998
commit: 77f7a9282fee67180134e75b107ff09d7e1a5876 [5532/8449] KVM: arm64: gic-v5: Introduce guest IST alloc and management
config: arm64-randconfig-r1307-20260918 (https://download.01.org/0day-ci/archive/20260919/202609190952.glUgOBvp-lkp@intel.com/config)
compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project 7252edd9aa82ef1c570ff6694ef7f4763a8a5d2f)
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260919/202609190952.glUgOBvp-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202609190952.glUgOBvp-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
   arch/arm64/kvm/vgic/vgic-v5-tables.c:464:31: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected void [noderef] __iomem *vmd_base @@     got void *[assigned] vmd @@
   arch/arm64/kvm/vgic/vgic-v5-tables.c:464:31: sparse:     expected void [noderef] __iomem *vmd_base
   arch/arm64/kvm/vgic/vgic-v5-tables.c:464:31: sparse:     got void *[assigned] vmd
   arch/arm64/kvm/vgic/vgic-v5-tables.c:505:24: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected restricted __le64 [noderef] [usertype] __iomem *vpet_base @@     got restricted __le64 [usertype] *[assigned] vpet @@
   arch/arm64/kvm/vgic/vgic-v5-tables.c:505:24: sparse:     expected restricted __le64 [noderef] [usertype] __iomem *vpet_base
   arch/arm64/kvm/vgic/vgic-v5-tables.c:505:24: sparse:     got restricted __le64 [usertype] *[assigned] vpet
>> arch/arm64/kvm/vgic/vgic-v5-tables.c:962:34: sparse: sparse: Using plain integer as NULL pointer
   arch/arm64/kvm/vgic/vgic-v5-tables.c:628:18: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const *objp @@     got restricted __le64 [noderef] [usertype] __iomem *vpet_base @@
   arch/arm64/kvm/vgic/vgic-v5-tables.c:628:18: sparse:     expected void const *objp
   arch/arm64/kvm/vgic/vgic-v5-tables.c:628:18: sparse:     got restricted __le64 [noderef] [usertype] __iomem *vpet_base
   arch/arm64/kvm/vgic/vgic-v5-tables.c:629:18: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const *objp @@     got void [noderef] __iomem *vmd_base @@
   arch/arm64/kvm/vgic/vgic-v5-tables.c:629:18: sparse:     expected void const *objp
   arch/arm64/kvm/vgic/vgic-v5-tables.c:629:18: sparse:     got void [noderef] __iomem *vmd_base
   arch/arm64/kvm/vgic/vgic-v5-tables.c:669:19: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected restricted __le64 [usertype] *vpet_base @@     got restricted __le64 [noderef] [usertype] __iomem *vpet_base @@
   arch/arm64/kvm/vgic/vgic-v5-tables.c:669:19: sparse:     expected restricted __le64 [usertype] *vpet_base
   arch/arm64/kvm/vgic/vgic-v5-tables.c:669:19: sparse:     got restricted __le64 [noderef] [usertype] __iomem *vpet_base
   arch/arm64/kvm/vgic/vgic-v5-tables.c:681:13: sparse: sparse: incorrect type in assignment (different base types) @@     expected restricted __le64 [usertype] tmp @@     got unsigned long long @@
   arch/arm64/kvm/vgic/vgic-v5-tables.c:681:13: sparse:     expected restricted __le64 [usertype] tmp
   arch/arm64/kvm/vgic/vgic-v5-tables.c:681:13: sparse:     got unsigned long long
   arch/arm64/kvm/vgic/vgic-v5-tables.c:684:17: sparse: sparse: cast from restricted __le64
   arch/arm64/kvm/vgic/vgic-v5-tables.c:717:19: sparse: sparse: incorrect type in assignment (different address spaces) @@     expected restricted __le64 [usertype] *vpet_base @@     got restricted __le64 [noderef] [usertype] __iomem *vpet_base @@
   arch/arm64/kvm/vgic/vgic-v5-tables.c:717:19: sparse:     expected restricted __le64 [usertype] *vpet_base
   arch/arm64/kvm/vgic/vgic-v5-tables.c:717:19: sparse:     got restricted __le64 [noderef] [usertype] __iomem *vpet_base

vim +962 arch/arm64/kvm/vgic/vgic-v5-tables.c

   938	
   939	/* Allocate a two-level IST - LPIs, only */
   940	static int vgic_v5_alloc_two_level_lpi_ist(struct kvm *kvm, unsigned int id_bits,
   941						   unsigned int istsz, unsigned int l2sz)
   942	{
   943		u32 vm_id = vgic_v5_vm_id(kvm);
   944		struct vgic_v5_vm_info *vmi;
   945		int ret;
   946	
   947		/*
   948		 * Allocate the L1 IST first, then all of the L2s. Everything
   949		 * is preallocated and we do no on-demand IST allocation. This
   950		 * is to avoid needing to track if and when the guest is doing
   951		 * on-demand IST allocation.
   952		 */
   953		ret = vgic_v5_alloc_l1_ist(kvm, id_bits, istsz, l2sz);
   954		if (ret)
   955			return ret;
   956	
   957		ret = vgic_v5_alloc_l2_ists(kvm, id_bits, istsz, l2sz);
   958		if (ret) {
   959			/* Free the L1 IST again */
   960			vmi = xa_load(&vm_info, vm_id);
   961			kfree(vmi->h_lpi_ist);
 > 962			vmi->h_lpi_ist = 0;
   963	
   964			return ret;
   965		}
   966	
   967		return 0;
   968	}
   969	

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