linux-kernel - Re: [PATCH v2 1/5] KVM: Add arch specific interfaces for sampling guest callchains

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Message-ID: <202310090559.wzrojQni-lkp@intel.com>
Date:   Mon, 9 Oct 2023 05:32:47 +0800
From:   kernel test robot <lkp@...el.com>
To:     Tianyi Liu <i.pear@...look.com>, seanjc@...gle.com,
        pbonzini@...hat.com, peterz@...radead.org, mingo@...hat.com,
        acme@...nel.org
Cc:     oe-kbuild-all@...ts.linux.dev,
        linux-arm-kernel@...ts.infradead.org, kvmarm@...ts.linux.dev,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        kvm@...r.kernel.org, x86@...nel.org, mark.rutland@....com,
        alexander.shishkin@...ux.intel.com, jolsa@...nel.org,
        namhyung@...nel.org, irogers@...gle.com, adrian.hunter@...el.com,
        Tianyi Liu <i.pear@...look.com>
Subject: Re: [PATCH v2 1/5] KVM: Add arch specific interfaces for sampling
 guest callchains

Hi Tianyi,

kernel test robot noticed the following build warnings:

[auto build test WARNING on 8a749fd1a8720d4619c91c8b6e7528c0a355c0aa]

url:    https://github.com/intel-lab-lkp/linux/commits/Tianyi-Liu/KVM-Add-arch-specific-interfaces-for-sampling-guest-callchains/20231008-230042
base:   8a749fd1a8720d4619c91c8b6e7528c0a355c0aa
patch link:    https://lore.kernel.org/r/SY4P282MB10840154D4F09917D6528BC69DCFA%40SY4P282MB1084.AUSP282.PROD.OUTLOOK.COM
patch subject: [PATCH v2 1/5] KVM: Add arch specific interfaces for sampling guest callchains
config: x86_64-defconfig (https://download.01.org/0day-ci/archive/20231009/202310090559.wzrojQni-lkp@intel.com/config)
compiler: gcc-11 (Debian 11.3.0-12) 11.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231009/202310090559.wzrojQni-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202310090559.wzrojQni-lkp@intel.com/

All warnings (new ones prefixed by >>):

   arch/x86/kvm/x86.c: In function 'kvm_arch_vcpu_read_virt':
>> arch/x86/kvm/x86.c:12917:42: warning: passing argument 2 of 'kvm_read_guest_virt' makes integer from pointer without a cast [-Wint-conversion]
   12917 |         return kvm_read_guest_virt(vcpu, addr, dest, length, &e) == X86EMUL_CONTINUE;
         |                                          ^~~~
         |                                          |
         |                                          void *
   arch/x86/kvm/x86.c:7388:38: note: expected 'gva_t' {aka 'long unsigned int'} but argument is of type 'void *'
    7388 |                                gva_t addr, void *val, unsigned int bytes,
         |                                ~~~~~~^~~~


vim +/kvm_read_guest_virt +12917 arch/x86/kvm/x86.c

 12911	
 12912	bool kvm_arch_vcpu_read_virt(struct kvm_vcpu *vcpu, void *addr, void *dest, unsigned int length)
 12913	{
 12914		struct x86_exception e;
 12915	
 12916		/* Return true on success */
 12917		return kvm_read_guest_virt(vcpu, addr, dest, length, &e) == X86EMUL_CONTINUE;
 12918	}
 12919	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki