From: kernel test robot <lkp@intel.com>
To: kbuild-all@lists.01.org
Subject: Re: [RFC PATCH v7 3/3] KVM: arm64: ioctl to fetch/store tags in a guest
Date: Sat, 16 Jan 2021 02:33:47 +0800 [thread overview]
Message-ID: <202101160226.ttMj4wZG-lkp@intel.com> (raw)
In-Reply-To: <20210115152811.8398-4-steven.price@arm.com>
[-- Attachment #1: Type: text/plain, Size: 3408 bytes --]
Hi Steven,
[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on arm64/for-next/core]
[also build test WARNING on v5.11-rc3]
[cannot apply to kvmarm/next kvm/linux-next next-20210115]
[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]
url: https://github.com/0day-ci/linux/commits/Steven-Price/MTE-support-for-KVM-guest/20210115-233109
base: https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core
config: arm64-allyesconfig (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0
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/0day-ci/linux/commit/ddde8cff287aad027c9fa0015afe26ced5041f50
git remote add linux-review https://github.com/0day-ci/linux
git fetch --no-tags linux-review Steven-Price/MTE-support-for-KVM-guest/20210115-233109
git checkout ddde8cff287aad027c9fa0015afe26ced5041f50
# save the attached .config to linux build tree
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64
If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
arch/arm64/kvm/arm.c: In function 'kvm_vm_ioctl_mte_copy_tags':
>> arch/arm64/kvm/arm.c:1313:9: warning: variable 'pages' set but not used [-Wunused-but-set-variable]
1313 | size_t pages;
| ^~~~~
vim +/pages +1313 arch/arm64/kvm/arm.c
1305
1306 static int kvm_vm_ioctl_mte_copy_tags(struct kvm *kvm,
1307 struct kvm_arm_copy_mte_tags *copy_tags)
1308 {
1309 gpa_t guest_ipa = copy_tags->guest_ipa;
1310 size_t length = copy_tags->length;
1311 void __user *tags = copy_tags->addr;
1312 gpa_t gfn;
> 1313 size_t pages;
1314 bool write = !(copy_tags->flags & KVM_ARM_TAGS_FROM_GUEST);
1315
1316 if (copy_tags->flags & ~KVM_ARM_TAGS_FROM_GUEST)
1317 return -EINVAL;
1318
1319 if (length & ~PAGE_MASK || guest_ipa & ~PAGE_MASK)
1320 return -EINVAL;
1321
1322 gfn = gpa_to_gfn(guest_ipa);
1323 pages = length >> PAGE_SHIFT;
1324
1325 while (length > 0) {
1326 kvm_pfn_t pfn = gfn_to_pfn_prot(kvm, gfn, write, NULL);
1327 void *maddr;
1328 unsigned long num_tags = PAGE_SIZE / MTE_GRANULE_SIZE;
1329
1330 if (is_error_noslot_pfn(pfn))
1331 return -ENOENT;
1332
1333 maddr = page_address(pfn_to_page(pfn));
1334
1335 if (!write) {
1336 num_tags = mte_copy_tags_to_user(tags, maddr, num_tags);
1337 kvm_release_pfn_clean(pfn);
1338 } else {
1339 num_tags = mte_copy_tags_from_user(maddr, tags,
1340 num_tags);
1341 kvm_release_pfn_dirty(pfn);
1342 }
1343
1344 if (num_tags != PAGE_SIZE / MTE_GRANULE_SIZE)
1345 return -EFAULT;
1346
1347 gfn++;
1348 tags += num_tags;
1349 length -= PAGE_SIZE;
1350 }
1351
1352 return 0;
1353 }
1354
---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
[-- Attachment #2: config.gz --]
[-- Type: application/gzip, Size: 76471 bytes --]
prev parent reply other threads:[~2021-01-15 18:33 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-15 15:28 [PATCH v7 0/3] MTE support for KVM guest Steven Price
2021-01-15 15:28 ` Steven Price
2021-01-15 15:28 ` Steven Price
2021-01-15 15:28 ` Steven Price
2021-01-15 15:28 ` [PATCH v7 1/3] arm64: kvm: Save/restore MTE registers Steven Price
2021-01-15 15:28 ` Steven Price
2021-01-15 15:28 ` Steven Price
2021-01-15 15:28 ` Steven Price
2021-02-02 15:36 ` Marc Zyngier
2021-02-02 15:36 ` Marc Zyngier
2021-02-02 15:36 ` Marc Zyngier
2021-02-02 15:36 ` Marc Zyngier
2021-02-04 14:33 ` Steven Price
2021-02-04 14:33 ` Steven Price
2021-02-04 14:33 ` Steven Price
2021-02-04 14:33 ` Steven Price
2021-02-04 14:56 ` Marc Zyngier
2021-02-04 14:56 ` Marc Zyngier
2021-02-04 14:56 ` Marc Zyngier
2021-02-04 14:56 ` Marc Zyngier
2021-01-15 15:28 ` [PATCH v7 2/3] arm64: kvm: Introduce MTE VCPU feature Steven Price
2021-01-15 15:28 ` Steven Price
2021-01-15 15:28 ` Steven Price
2021-01-15 15:28 ` Steven Price
2021-02-02 17:12 ` Marc Zyngier
2021-02-02 17:12 ` Marc Zyngier
2021-02-02 17:12 ` Marc Zyngier
2021-02-02 17:12 ` Marc Zyngier
2021-02-04 14:33 ` Steven Price
2021-02-04 14:33 ` Steven Price
2021-02-04 14:33 ` Steven Price
2021-02-04 14:33 ` Steven Price
2021-01-15 15:28 ` [RFC PATCH v7 3/3] KVM: arm64: ioctl to fetch/store tags in a guest Steven Price
2021-01-15 15:28 ` Steven Price
2021-01-15 15:28 ` Steven Price
2021-01-15 15:28 ` Steven Price
2021-01-15 18:33 ` kernel test robot [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=202101160226.ttMj4wZG-lkp@intel.com \
--to=lkp@intel.com \
--cc=kbuild-all@lists.01.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.