Re: [PATCH v2 29/29] LoongArch: KVM: Enable kvm config and add the makefile
From: kernel test robot
Date: Mon Feb 20 2023 - 04:48:20 EST
Hi Tianrui,
Thank you for the patch! Perhaps something to improve:
[auto build test WARNING on linus/master]
[also build test WARNING on v6.2]
[cannot apply to kvm/queue kvm/linux-next next-20230220]
[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/Tianrui-Zhao/LoongArch-KVM-Add-kvm-related-header-files/20230220-151305
patch link: https://lore.kernel.org/r/20230220065735.1282809-30-zhaotianrui%40loongson.cn
patch subject: [PATCH v2 29/29] LoongArch: KVM: Enable kvm config and add the makefile
config: loongarch-defconfig (https://download.01.org/0day-ci/archive/20230220/202302201710.ERtpPSuD-lkp@xxxxxxxxx/config)
compiler: loongarch64-linux-gcc (GCC) 12.1.0
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/55ee4e26440ad32966cf3ee796b8a519c77ac66b
git remote add linux-review https://github.com/intel-lab-lkp/linux
git fetch --no-tags linux-review Tianrui-Zhao/LoongArch-KVM-Add-kvm-related-header-files/20230220-151305
git checkout 55ee4e26440ad32966cf3ee796b8a519c77ac66b
# save the config file
mkdir build_dir && cp config build_dir/.config
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=loongarch olddefconfig
COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=loongarch SHELL=/bin/bash arch/loongarch/kvm/
If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Link: https://lore.kernel.org/oe-kbuild-all/202302201710.ERtpPSuD-lkp@xxxxxxxxx/
All warnings (new ones prefixed by >>):
arch/loongarch/kvm/vcpu.c: In function 'kvm_own_fpu':
>> arch/loongarch/kvm/vcpu.c:595:23: warning: variable 'sr' set but not used [-Wunused-but-set-variable]
595 | unsigned long sr;
| ^~
arch/loongarch/kvm/vcpu.c: At top level:
>> arch/loongarch/kvm/vcpu.c:636:5: warning: no previous prototype for 'kvm_vcpu_ioctl_interrupt' [-Wmissing-prototypes]
636 | int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
| ^~~~~~~~~~~~~~~~~~~~~~~~
In file included from include/linux/huge_mm.h:8,
from include/linux/mm.h:746,
from include/linux/kvm_host.h:16,
from arch/loongarch/kvm/vcpu.c:6:
arch/loongarch/kvm/vcpu.c:126:25: warning: 'vcpu_pid_fops' defined but not used [-Wunused-const-variable=]
126 | DEFINE_SIMPLE_ATTRIBUTE(vcpu_pid_fops, vcpu_pid_get, NULL, "%llu\n");
| ^~~~~~~~~~~~~
include/linux/fs.h:3496:37: note: in definition of macro 'DEFINE_SIMPLE_ATTRIBUTE_XSIGNED'
3496 | static const struct file_operations __fops = { \
| ^~~~~~
arch/loongarch/kvm/vcpu.c:126:1: note: in expansion of macro 'DEFINE_SIMPLE_ATTRIBUTE'
126 | DEFINE_SIMPLE_ATTRIBUTE(vcpu_pid_fops, vcpu_pid_get, NULL, "%llu\n");
| ^~~~~~~~~~~~~~~~~~~~~~~
arch/loongarch/kvm/vcpu.c:116:25: warning: 'lvcpu_stat_fops' defined but not used [-Wunused-const-variable=]
116 | DEFINE_SIMPLE_ATTRIBUTE(lvcpu_stat_fops, lvcpu_stat_get, NULL, "%llu\n");
| ^~~~~~~~~~~~~~~
include/linux/fs.h:3496:37: note: in definition of macro 'DEFINE_SIMPLE_ATTRIBUTE_XSIGNED'
3496 | static const struct file_operations __fops = { \
| ^~~~~~
arch/loongarch/kvm/vcpu.c:116:1: note: in expansion of macro 'DEFINE_SIMPLE_ATTRIBUTE'
116 | DEFINE_SIMPLE_ATTRIBUTE(lvcpu_stat_fops, lvcpu_stat_get, NULL, "%llu\n");
| ^~~~~~~~~~~~~~~~~~~~~~~
vim +/sr +595 arch/loongarch/kvm/vcpu.c
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 591
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 592 /* Enable FPU for guest and restore context */
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 593 void kvm_own_fpu(struct kvm_vcpu *vcpu)
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 594 {
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 @595 unsigned long sr;
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 596
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 597 preempt_disable();
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 598
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 599 sr = kvm_read_hw_gcsr(LOONGARCH_CSR_EUEN);
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 600
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 601 /*
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 602 * Enable FPU for guest
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 603 * We set FR and FRE according to guest context
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 604 */
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 605 set_csr_euen(CSR_EUEN_FPEN);
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 606
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 607 /* If guest FPU state not active, restore it now */
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 608 if (!(vcpu->arch.aux_inuse & KVM_LARCH_FPU)) {
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 609 kvm_restore_fpu(&vcpu->arch.fpu);
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 610 vcpu->arch.aux_inuse |= KVM_LARCH_FPU;
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 611 trace_kvm_aux(vcpu, KVM_TRACE_AUX_RESTORE, KVM_TRACE_AUX_FPU);
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 612 } else {
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 613 trace_kvm_aux(vcpu, KVM_TRACE_AUX_ENABLE, KVM_TRACE_AUX_FPU);
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 614 }
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 615
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 616 preempt_enable();
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 617 }
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 618
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 619 /* Save and disable FPU */
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 620 void kvm_lose_fpu(struct kvm_vcpu *vcpu)
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 621 {
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 622 preempt_disable();
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 623
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 624 if (vcpu->arch.aux_inuse & KVM_LARCH_FPU) {
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 625 kvm_save_fpu(&vcpu->arch.fpu);
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 626 vcpu->arch.aux_inuse &= ~KVM_LARCH_FPU;
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 627 trace_kvm_aux(vcpu, KVM_TRACE_AUX_SAVE, KVM_TRACE_AUX_FPU);
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 628
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 629 /* Disable FPU */
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 630 clear_csr_euen(CSR_EUEN_FPEN);
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 631 }
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 632
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 633 preempt_enable();
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 634 }
81d0b9f4fa1f11 Tianrui Zhao 2023-02-20 635
a4dadfc6695b38 Tianrui Zhao 2023-02-20 @636 int kvm_vcpu_ioctl_interrupt(struct kvm_vcpu *vcpu,
a4dadfc6695b38 Tianrui Zhao 2023-02-20 637 struct kvm_loongarch_interrupt *irq)
a4dadfc6695b38 Tianrui Zhao 2023-02-20 638 {
a4dadfc6695b38 Tianrui Zhao 2023-02-20 639 int intr = (int)irq->irq;
a4dadfc6695b38 Tianrui Zhao 2023-02-20 640 struct kvm_vcpu *dvcpu = NULL;
a4dadfc6695b38 Tianrui Zhao 2023-02-20 641
a4dadfc6695b38 Tianrui Zhao 2023-02-20 642 if (irq->cpu == -1)
a4dadfc6695b38 Tianrui Zhao 2023-02-20 643 dvcpu = vcpu;
a4dadfc6695b38 Tianrui Zhao 2023-02-20 644 else
a4dadfc6695b38 Tianrui Zhao 2023-02-20 645 dvcpu = kvm_get_vcpu(vcpu->kvm, irq->cpu);
a4dadfc6695b38 Tianrui Zhao 2023-02-20 646
a4dadfc6695b38 Tianrui Zhao 2023-02-20 647 if (intr > 0)
a4dadfc6695b38 Tianrui Zhao 2023-02-20 648 _kvm_queue_irq(dvcpu, intr);
a4dadfc6695b38 Tianrui Zhao 2023-02-20 649 else if (intr < 0)
a4dadfc6695b38 Tianrui Zhao 2023-02-20 650 _kvm_dequeue_irq(dvcpu, -intr);
a4dadfc6695b38 Tianrui Zhao 2023-02-20 651 else {
a4dadfc6695b38 Tianrui Zhao 2023-02-20 652 kvm_err("%s: invalid interrupt ioctl (%d:%d)\n", __func__,
a4dadfc6695b38 Tianrui Zhao 2023-02-20 653 irq->cpu, irq->irq);
a4dadfc6695b38 Tianrui Zhao 2023-02-20 654 return -EINVAL;
a4dadfc6695b38 Tianrui Zhao 2023-02-20 655 }
a4dadfc6695b38 Tianrui Zhao 2023-02-20 656
a4dadfc6695b38 Tianrui Zhao 2023-02-20 657 kvm_vcpu_kick(dvcpu);
a4dadfc6695b38 Tianrui Zhao 2023-02-20 658 return 0;
a4dadfc6695b38 Tianrui Zhao 2023-02-20 659 }
a4dadfc6695b38 Tianrui Zhao 2023-02-20 660
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests