[PATCH v4 19/20] KVM: Allow for different capacities in kvm_mmu_memory_cache structs

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

Hi David,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on 150866cd0ec871c765181d145aa0912628289c8a]

url:    https://github.com/intel-lab-lkp/linux/commits/David-Matlack/KVM-Extend-Eager-Page-Splitting-to-the-shadow-MMU/20220423-062108
base:   150866cd0ec871c765181d145aa0912628289c8a
config: riscv-randconfig-r005-20220422 (https://download.01.org/0day-ci/archive/20220423/202204231516.bclimUe4-lkp at intel.com/config)
compiler: riscv64-linux-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/871c5afc76a6f414c03f433d06bacfd928910b1b
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review David-Matlack/KVM-Extend-Eager-Page-Splitting-to-the-shadow-MMU/20220423-062108
        git checkout 871c5afc76a6f414c03f433d06bacfd928910b1b
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All error/warnings (new ones prefixed by >>):

   arch/riscv/kvm/mmu.c: In function 'stage2_ioremap':
>> arch/riscv/kvm/mmu.c:364:56: error: 'struct kvm_mmu_memory_cache' has no member named 'cache'
     364 |                 ret = kvm_mmu_topup_memory_cache(&cache.cache, stage2_pgd_levels);
         |                                                        ^
   arch/riscv/kvm/mmu.c:369:52: error: 'struct kvm_mmu_memory_cache' has no member named 'cache'
     369 |                 ret = stage2_set_pte(kvm, 0, &cache.cache, addr, &pte);
         |                                                    ^
   arch/riscv/kvm/mmu.c:378:41: error: 'struct kvm_mmu_memory_cache' has no member named 'cache'
     378 |         kvm_mmu_free_memory_cache(&cache.cache);
         |                                         ^
>> arch/riscv/kvm/mmu.c:350:37: warning: variable 'cache' set but not used [-Wunused-but-set-variable]
     350 |         struct kvm_mmu_memory_cache cache = {
         |                                     ^~~~~


vim +364 arch/riscv/kvm/mmu.c

   342	
   343	static int stage2_ioremap(struct kvm *kvm, gpa_t gpa, phys_addr_t hpa,
   344				  unsigned long size, bool writable)
   345	{
   346		pte_t pte;
   347		int ret = 0;
   348		unsigned long pfn;
   349		phys_addr_t addr, end;
 > 350		struct kvm_mmu_memory_cache cache = {
   351			.capacity = KVM_ARCH_NR_OBJS_PER_MEMORY_CACHE,
   352			.gfp_zero = __GFP_ZERO,
   353		};
   354	
   355		end = (gpa + size + PAGE_SIZE - 1) & PAGE_MASK;
   356		pfn = __phys_to_pfn(hpa);
   357	
   358		for (addr = gpa; addr < end; addr += PAGE_SIZE) {
   359			pte = pfn_pte(pfn, PAGE_KERNEL);
   360	
   361			if (!writable)
   362				pte = pte_wrprotect(pte);
   363	
 > 364			ret = kvm_mmu_topup_memory_cache(&cache.cache, stage2_pgd_levels);
   365			if (ret)
   366				goto out;
   367	
   368			spin_lock(&kvm->mmu_lock);
   369			ret = stage2_set_pte(kvm, 0, &cache.cache, addr, &pte);
   370			spin_unlock(&kvm->mmu_lock);
   371			if (ret)
   372				goto out;
   373	
   374			pfn++;
   375		}
   376	
   377	out:
   378		kvm_mmu_free_memory_cache(&cache.cache);
   379		return ret;
   380	}
   381	

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https://01.org/lkp