[android-common:android17-6.18 1/1] arch/arm64/kvm/pkvm.c:123:22: sparse: sparse: cast to restricted gfp_t

[kernel test robot <lkp@intel.com>]

tree:   https://android.googlesource.com/kernel/common android17-6.18
head:   08e21ebff803243bccd5e6cd4a8253ffebf74c64
commit: 1ded80a53cb8dc6c83e47578f7eacca8772245ce [1/1] ANDROID: KVM: arm64: Allow GFP_ATOMIC for host stage-2 pool topup
config: arm64-randconfig-r133-20260408 (https://download.01.org/0day-ci/archive/20260410/202604102216.ejXBTPgA-lkp@intel.com/config)
compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project c80443cd37b2e2788cba67ffa180a6331e5f0791)
sparse: v0.6.5-rc1
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260410/202604102216.ejXBTPgA-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/202604102216.ejXBTPgA-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> arch/arm64/kvm/pkvm.c:123:22: sparse: sparse: cast to restricted gfp_t
>> arch/arm64/kvm/pkvm.c:148:45: sparse: sparse: cast from restricted gfp_t

vim +123 arch/arm64/kvm/pkvm.c

   120	
   121	static void *__host_stage2_alloc(void *arg, unsigned long order)
   122	{
 > 123		gfp_t gfp = (gfp_t)(uintptr_t)arg;
   124		struct page *p;
   125	
   126		p = __cma_alloc(host_s2_cma, 1, 0, gfp);
   127		if (!p)
   128			return NULL;
   129	
   130		return page_to_virt(p);
   131	}
   132	
   133	static void __host_stage2_free(void *virt, void *arg, unsigned long order)
   134	{
   135		WARN_ON(!cma_release(host_s2_cma, virt_to_page(virt), 1));
   136	}
   137	
   138	int pkvm_host_stage2_topup(gfp_t gfp)
   139	{
   140		struct kvm_hyp_memcache mc;
   141		int ret = -EINVAL;
   142	
   143		if (!gfpflags_allow_blocking(gfp) && host_s2_mode != PKVM_HOST_S2_GCMA)
   144			goto err;
   145	
   146		init_hyp_memcache(&mc);
   147		ret = __topup_hyp_memcache(&mc, 3, __host_stage2_alloc, kvm_host_pa,
 > 148					   (void *)(uintptr_t)(gfp | __GFP_NOWARN), 0);
   149		if (ret && !mc.nr_pages)
   150			return ret;
   151	
   152		ret = __pkvm_topup_hyp_alloc_mgt_mc(HYP_ALLOC_MGT_HOSTS2_ID, &mc);
   153		if (ret)
   154			__free_hyp_memcache(&mc, __host_stage2_free, kvm_host_va, NULL);
   155	
   156	err:
   157		return WARN_ON_ONCE(ret);
   158	}
   159	EXPORT_SYMBOL(pkvm_host_stage2_topup);
   160	#else
   161	static void __host_stage2_free(void *virt, void *arg, unsigned long order) { WARN_ON(1); }
   162	static void __init pkvm_host_stage2_drain(void) { }
   163	#endif
   164	

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