Re: [PATCH] KVM: arm64: Allow module-owned pages in host stage-2 range adjustment

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

Hi,

kernel test robot noticed the following build errors:

[auto build test ERROR on kvmarm/next]
[also build test ERROR on linus/master v6.19 next-20260205]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/kyle-jk-liao-mediatek-com/KVM-arm64-Allow-module-owned-pages-in-host-stage-2-range-adjustment/20260209-112902
base:   https://git.kernel.org/pub/scm/linux/kernel/git/kvmarm/kvmarm.git next
patch link:    https://lore.kernel.org/r/20260209032421.1278325-1-kyle-jk.liao%40mediatek.com
patch subject: [PATCH] KVM: arm64: Allow module-owned pages in host stage-2 range adjustment
config: arm64-defconfig (https://download.01.org/0day-ci/archive/20260210/202602100127.gNjhsGVB-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 15.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260210/202602100127.gNjhsGVB-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/202602100127.gNjhsGVB-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from arch/arm64/include/asm/bug.h:26,
                    from include/linux/bug.h:5,
                    from include/linux/thread_info.h:13,
                    from arch/arm64/include/asm/processor.h:35,
                    from include/linux/sched.h:13,
                    from include/linux/resume_user_mode.h:6,
                    from include/linux/entry-virt.h:6,
                    from include/linux/kvm_host.h:5,
                    from arch/arm64/kvm/hyp/nvhe/mem_protect.c:7:
   arch/arm64/kvm/hyp/nvhe/mem_protect.c: In function 'host_stage2_adjust_range':
>> arch/arm64/kvm/hyp/nvhe/mem_protect.c:513:74: error: 'PKVM_MODULE_OWNED_PAGE' undeclared (first use in this function)
     513 |                         (state != PKVM_NOPAGE && state != (PKVM_NOPAGE | PKVM_MODULE_OWNED_PAGE)));
         |                                                                          ^~~~~~~~~~~~~~~~~~~~~~
   include/asm-generic/bug.h:110:32: note: in definition of macro 'WARN_ON'
     110 |         int __ret_warn_on = !!(condition);                              \
         |                                ^~~~~~~~~
   arch/arm64/kvm/hyp/nvhe/mem_protect.c:513:74: note: each undeclared identifier is reported only once for each function it appears in
     513 |                         (state != PKVM_NOPAGE && state != (PKVM_NOPAGE | PKVM_MODULE_OWNED_PAGE)));
         |                                                                          ^~~~~~~~~~~~~~~~~~~~~~
   include/asm-generic/bug.h:110:32: note: in definition of macro 'WARN_ON'
     110 |         int __ret_warn_on = !!(condition);                              \
         |                                ^~~~~~~~~


vim +/PKVM_MODULE_OWNED_PAGE +513 arch/arm64/kvm/hyp/nvhe/mem_protect.c

   492	
   493	static int host_stage2_adjust_range(u64 addr, struct kvm_mem_range *range)
   494	{
   495		struct kvm_mem_range cur;
   496		kvm_pte_t pte;
   497		u64 granule;
   498		s8 level;
   499		int ret;
   500		enum pkvm_page_state state;
   501	
   502		hyp_assert_lock_held(&host_mmu.lock);
   503		ret = kvm_pgtable_get_leaf(&host_mmu.pgt, addr, &pte, &level);
   504		if (ret)
   505			return ret;
   506	
   507		if (kvm_pte_valid(pte))
   508			return -EAGAIN;
   509	
   510		if (pte) {
   511			state = get_host_state(hyp_phys_to_page(addr));
   512			WARN_ON(addr_is_memory(addr) &&
 > 513				(state != PKVM_NOPAGE && state != (PKVM_NOPAGE | PKVM_MODULE_OWNED_PAGE)));
   514			return -EPERM;
   515		}
   516	
   517		for (; level <= KVM_PGTABLE_LAST_LEVEL; level++) {
   518			if (!kvm_level_supports_block_mapping(level))
   519				continue;
   520			granule = kvm_granule_size(level);
   521			cur.start = ALIGN_DOWN(addr, granule);
   522			cur.end = cur.start + granule;
   523			if (!range_included(&cur, range))
   524				continue;
   525			*range = cur;
   526			return 0;
   527		}
   528	
   529		WARN_ON(1);
   530	
   531		return -EINVAL;
   532	}
   533	

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