Re: [PATCH v10 05/10] x86: spp: Introduce user-space SPP IOCTLs (fwd)

From: Julia Lawall
Date: Wed Jan 01 2020 - 06:03:32 EST

See lines 5185 and 5186.

julia

---------- Forwarded message ----------
Date: Wed, 1 Jan 2020 14:03:47 +0800
From: kbuild test robot <lkp@xxxxxxxxx>
To: kbuild@xxxxxxxxxxxx
Cc: Julia Lawall <julia.lawall@xxxxxxx>
Subject: Re: [PATCH v10 05/10] x86: spp: Introduce user-space SPP IOCTLs

CC: kbuild-all@xxxxxxxxxxxx
In-Reply-To: <20191231065043.2209-6-weijiang.yang@xxxxxxxxx>
References: <20191231065043.2209-6-weijiang.yang@xxxxxxxxx>
TO: Yang Weijiang <weijiang.yang@xxxxxxxxx>
CC: kvm@xxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, pbonzini@xxxxxxxxxx, jmattson@xxxxxxxxxx, sean.j.christopherson@xxxxxxxxx
CC: yu.c.zhang@xxxxxxxxxxxxxxx, alazar@xxxxxxxxxxxxxxx, edwin.zhai@xxxxxxxxx, Yang Weijiang <weijiang.yang@xxxxxxxxx>

Hi Yang,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on kvm/linux-next]
[also build test WARNING on vhost/linux-next tip/auto-latest linux/master linus/master v5.5-rc4 next-20191220]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url: https://github.com/0day-ci/linux/commits/Yang-Weijiang/Enable-Sub-Page-Write-Protection-Support/20191231-145254
base: https://git.kernel.org/pub/scm/virt/kvm/kvm.git linux-next
:::::: branch date: 23 hours ago
:::::: commit date: 23 hours ago

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@xxxxxxxxx>
Reported-by: Julia Lawall <julia.lawall@xxxxxxx>

>> arch/x86/kvm/x86.c:5186:6-11: ERROR: reference preceded by free on line 5185

# https://github.com/0day-ci/linux/commit/148f2ec985f4ef45bcde3f5a787394f23a18e800
git remote add linux-review https://github.com/0day-ci/linux
git remote update linux-review
git checkout 148f2ec985f4ef45bcde3f5a787394f23a18e800
vim +5186 arch/x86/kvm/x86.c

90de4a1875180f arch/x86/kvm/x86.c Nadav Amit 2015-04-13 4844
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4845 long kvm_arch_vm_ioctl(struct file *filp,
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4846 unsigned int ioctl, unsigned long arg)
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4847 {
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4848 struct kvm *kvm = filp->private_data;
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4849 void __user *argp = (void __user *)arg;
367e1319b22911 arch/x86/kvm/x86.c Avi Kivity 2009-08-26 4850 int r = -ENOTTY;
f0d662759a2465 arch/x86/kvm/x86.c Dave Hansen 2008-08-11 4851 /*
f0d662759a2465 arch/x86/kvm/x86.c Dave Hansen 2008-08-11 4852 * This union makes it completely explicit to gcc-3.x
f0d662759a2465 arch/x86/kvm/x86.c Dave Hansen 2008-08-11 4853 * that these two variables' stack usage should be
f0d662759a2465 arch/x86/kvm/x86.c Dave Hansen 2008-08-11 4854 * combined, not added together.
f0d662759a2465 arch/x86/kvm/x86.c Dave Hansen 2008-08-11 4855 */
f0d662759a2465 arch/x86/kvm/x86.c Dave Hansen 2008-08-11 4856 union {
f0d662759a2465 arch/x86/kvm/x86.c Dave Hansen 2008-08-11 4857 struct kvm_pit_state ps;
e9f4275732add0 arch/x86/kvm/x86.c Beth Kon 2009-07-07 4858 struct kvm_pit_state2 ps2;
c5ff41ce66382d arch/x86/kvm/x86.c Jan Kiszka 2009-05-14 4859 struct kvm_pit_config pit_config;
f0d662759a2465 arch/x86/kvm/x86.c Dave Hansen 2008-08-11 4860 } u;
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4861
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4862 switch (ioctl) {
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4863 case KVM_SET_TSS_ADDR:
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4864 r = kvm_vm_ioctl_set_tss_addr(kvm, arg);
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4865 break;
b927a3cec081a6 arch/x86/kvm/x86.c Sheng Yang 2009-07-21 4866 case KVM_SET_IDENTITY_MAP_ADDR: {
b927a3cec081a6 arch/x86/kvm/x86.c Sheng Yang 2009-07-21 4867 u64 ident_addr;
b927a3cec081a6 arch/x86/kvm/x86.c Sheng Yang 2009-07-21 4868
1af1ac910bb339 arch/x86/kvm/x86.c David Hildenbrand 2017-08-24 4869 mutex_lock(&kvm->lock);
1af1ac910bb339 arch/x86/kvm/x86.c David Hildenbrand 2017-08-24 4870 r = -EINVAL;
1af1ac910bb339 arch/x86/kvm/x86.c David Hildenbrand 2017-08-24 4871 if (kvm->created_vcpus)
1af1ac910bb339 arch/x86/kvm/x86.c David Hildenbrand 2017-08-24 4872 goto set_identity_unlock;
b927a3cec081a6 arch/x86/kvm/x86.c Sheng Yang 2009-07-21 4873 r = -EFAULT;
0e96f31ea4249b arch/x86/kvm/x86.c Jordan Borgner 2018-10-28 4874 if (copy_from_user(&ident_addr, argp, sizeof(ident_addr)))
1af1ac910bb339 arch/x86/kvm/x86.c David Hildenbrand 2017-08-24 4875 goto set_identity_unlock;
b927a3cec081a6 arch/x86/kvm/x86.c Sheng Yang 2009-07-21 4876 r = kvm_vm_ioctl_set_identity_map_addr(kvm, ident_addr);
1af1ac910bb339 arch/x86/kvm/x86.c David Hildenbrand 2017-08-24 4877 set_identity_unlock:
1af1ac910bb339 arch/x86/kvm/x86.c David Hildenbrand 2017-08-24 4878 mutex_unlock(&kvm->lock);
b927a3cec081a6 arch/x86/kvm/x86.c Sheng Yang 2009-07-21 4879 break;
b927a3cec081a6 arch/x86/kvm/x86.c Sheng Yang 2009-07-21 4880 }
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4881 case KVM_SET_NR_MMU_PAGES:
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4882 r = kvm_vm_ioctl_set_nr_mmu_pages(kvm, arg);
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4883 break;
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4884 case KVM_GET_NR_MMU_PAGES:
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4885 r = kvm_vm_ioctl_get_nr_mmu_pages(kvm);
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4886 break;
3ddea128ad75bd arch/x86/kvm/x86.c Marcelo Tosatti 2009-10-29 4887 case KVM_CREATE_IRQCHIP: {
3ddea128ad75bd arch/x86/kvm/x86.c Marcelo Tosatti 2009-10-29 4888 mutex_lock(&kvm->lock);
099413664c71fc arch/x86/kvm/x86.c Radim KrÄmÃÅ 2016-12-16 4889
3ddea128ad75bd arch/x86/kvm/x86.c Marcelo Tosatti 2009-10-29 4890 r = -EEXIST;
35e6eaa3df5582 arch/x86/kvm/x86.c Radim KrÄmÃÅ 2016-12-16 4891 if (irqchip_in_kernel(kvm))
3ddea128ad75bd arch/x86/kvm/x86.c Marcelo Tosatti 2009-10-29 4892 goto create_irqchip_unlock;
099413664c71fc arch/x86/kvm/x86.c Radim KrÄmÃÅ 2016-12-16 4893
3e515705a1f46b arch/x86/kvm/x86.c Avi Kivity 2012-03-05 4894 r = -EINVAL;
557abc40d12135 arch/x86/kvm/x86.c Paolo Bonzini 2016-06-13 4895 if (kvm->created_vcpus)
3e515705a1f46b arch/x86/kvm/x86.c Avi Kivity 2012-03-05 4896 goto create_irqchip_unlock;
099413664c71fc arch/x86/kvm/x86.c Radim KrÄmÃÅ 2016-12-16 4897
099413664c71fc arch/x86/kvm/x86.c Radim KrÄmÃÅ 2016-12-16 4898 r = kvm_pic_init(kvm);
099413664c71fc arch/x86/kvm/x86.c Radim KrÄmÃÅ 2016-12-16 4899 if (r)
099413664c71fc arch/x86/kvm/x86.c Radim KrÄmÃÅ 2016-12-16 4900 goto create_irqchip_unlock;
099413664c71fc arch/x86/kvm/x86.c Radim KrÄmÃÅ 2016-12-16 4901
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4902 r = kvm_ioapic_init(kvm);
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4903 if (r) {
099413664c71fc arch/x86/kvm/x86.c Radim KrÄmÃÅ 2016-12-16 4904 kvm_pic_destroy(kvm);
3ddea128ad75bd arch/x86/kvm/x86.c Marcelo Tosatti 2009-10-29 4905 goto create_irqchip_unlock;
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4906 }
099413664c71fc arch/x86/kvm/x86.c Radim KrÄmÃÅ 2016-12-16 4907
399ec807ddc38e arch/x86/kvm/x86.c Avi Kivity 2008-11-19 4908 r = kvm_setup_default_irq_routing(kvm);
399ec807ddc38e arch/x86/kvm/x86.c Avi Kivity 2008-11-19 4909 if (r) {
72bb2fcd23afe8 arch/x86/kvm/x86.c Wei Yongjun 2010-02-09 4910 kvm_ioapic_destroy(kvm);
099413664c71fc arch/x86/kvm/x86.c Radim KrÄmÃÅ 2016-12-16 4911 kvm_pic_destroy(kvm);
71ba994c94a81c arch/x86/kvm/x86.c Paolo Bonzini 2015-07-29 4912 goto create_irqchip_unlock;
399ec807ddc38e arch/x86/kvm/x86.c Avi Kivity 2008-11-19 4913 }
49776faf93f807 arch/x86/kvm/x86.c Radim KrÄmÃÅ 2016-12-16 4914 /* Write kvm->irq_routing before enabling irqchip_in_kernel. */
71ba994c94a81c arch/x86/kvm/x86.c Paolo Bonzini 2015-07-29 4915 smp_wmb();
49776faf93f807 arch/x86/kvm/x86.c Radim KrÄmÃÅ 2016-12-16 4916 kvm->arch.irqchip_mode = KVM_IRQCHIP_KERNEL;
3ddea128ad75bd arch/x86/kvm/x86.c Marcelo Tosatti 2009-10-29 4917 create_irqchip_unlock:
3ddea128ad75bd arch/x86/kvm/x86.c Marcelo Tosatti 2009-10-29 4918 mutex_unlock(&kvm->lock);
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4919 break;
3ddea128ad75bd arch/x86/kvm/x86.c Marcelo Tosatti 2009-10-29 4920 }
7837699fa6d7ad arch/x86/kvm/x86.c Sheng Yang 2008-01-28 4921 case KVM_CREATE_PIT:
c5ff41ce66382d arch/x86/kvm/x86.c Jan Kiszka 2009-05-14 4922 u.pit_config.flags = KVM_PIT_SPEAKER_DUMMY;
c5ff41ce66382d arch/x86/kvm/x86.c Jan Kiszka 2009-05-14 4923 goto create_pit;
c5ff41ce66382d arch/x86/kvm/x86.c Jan Kiszka 2009-05-14 4924 case KVM_CREATE_PIT2:
c5ff41ce66382d arch/x86/kvm/x86.c Jan Kiszka 2009-05-14 4925 r = -EFAULT;
c5ff41ce66382d arch/x86/kvm/x86.c Jan Kiszka 2009-05-14 4926 if (copy_from_user(&u.pit_config, argp,
c5ff41ce66382d arch/x86/kvm/x86.c Jan Kiszka 2009-05-14 4927 sizeof(struct kvm_pit_config)))
c5ff41ce66382d arch/x86/kvm/x86.c Jan Kiszka 2009-05-14 4928 goto out;
c5ff41ce66382d arch/x86/kvm/x86.c Jan Kiszka 2009-05-14 4929 create_pit:
250715a6171a07 arch/x86/kvm/x86.c Paolo Bonzini 2016-06-01 4930 mutex_lock(&kvm->lock);
269e05e48502f1 arch/x86/kvm/x86.c Avi Kivity 2009-01-05 4931 r = -EEXIST;
269e05e48502f1 arch/x86/kvm/x86.c Avi Kivity 2009-01-05 4932 if (kvm->arch.vpit)
269e05e48502f1 arch/x86/kvm/x86.c Avi Kivity 2009-01-05 4933 goto create_pit_unlock;
7837699fa6d7ad arch/x86/kvm/x86.c Sheng Yang 2008-01-28 4934 r = -ENOMEM;
c5ff41ce66382d arch/x86/kvm/x86.c Jan Kiszka 2009-05-14 4935 kvm->arch.vpit = kvm_create_pit(kvm, u.pit_config.flags);
7837699fa6d7ad arch/x86/kvm/x86.c Sheng Yang 2008-01-28 4936 if (kvm->arch.vpit)
7837699fa6d7ad arch/x86/kvm/x86.c Sheng Yang 2008-01-28 4937 r = 0;
269e05e48502f1 arch/x86/kvm/x86.c Avi Kivity 2009-01-05 4938 create_pit_unlock:
250715a6171a07 arch/x86/kvm/x86.c Paolo Bonzini 2016-06-01 4939 mutex_unlock(&kvm->lock);
7837699fa6d7ad arch/x86/kvm/x86.c Sheng Yang 2008-01-28 4940 break;
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4941 case KVM_GET_IRQCHIP: {
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4942 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
ff5c2c0316ff0e arch/x86/kvm/x86.c Sasha Levin 2011-12-04 4943 struct kvm_irqchip *chip;
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4944
ff5c2c0316ff0e arch/x86/kvm/x86.c Sasha Levin 2011-12-04 4945 chip = memdup_user(argp, sizeof(*chip));
ff5c2c0316ff0e arch/x86/kvm/x86.c Sasha Levin 2011-12-04 4946 if (IS_ERR(chip)) {
ff5c2c0316ff0e arch/x86/kvm/x86.c Sasha Levin 2011-12-04 4947 r = PTR_ERR(chip);
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4948 goto out;
ff5c2c0316ff0e arch/x86/kvm/x86.c Sasha Levin 2011-12-04 4949 }
ff5c2c0316ff0e arch/x86/kvm/x86.c Sasha Levin 2011-12-04 4950
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4951 r = -ENXIO;
826da32140dada arch/x86/kvm/x86.c Radim KrÄmÃÅ 2016-12-16 4952 if (!irqchip_kernel(kvm))
f0d662759a2465 arch/x86/kvm/x86.c Dave Hansen 2008-08-11 4953 goto get_irqchip_out;
f0d662759a2465 arch/x86/kvm/x86.c Dave Hansen 2008-08-11 4954 r = kvm_vm_ioctl_get_irqchip(kvm, chip);
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4955 if (r)
f0d662759a2465 arch/x86/kvm/x86.c Dave Hansen 2008-08-11 4956 goto get_irqchip_out;
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4957 r = -EFAULT;
0e96f31ea4249b arch/x86/kvm/x86.c Jordan Borgner 2018-10-28 4958 if (copy_to_user(argp, chip, sizeof(*chip)))
f0d662759a2465 arch/x86/kvm/x86.c Dave Hansen 2008-08-11 4959 goto get_irqchip_out;
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4960 r = 0;
f0d662759a2465 arch/x86/kvm/x86.c Dave Hansen 2008-08-11 4961 get_irqchip_out:
f0d662759a2465 arch/x86/kvm/x86.c Dave Hansen 2008-08-11 4962 kfree(chip);
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4963 break;
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4964 }
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4965 case KVM_SET_IRQCHIP: {
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4966 /* 0: PIC master, 1: PIC slave, 2: IOAPIC */
ff5c2c0316ff0e arch/x86/kvm/x86.c Sasha Levin 2011-12-04 4967 struct kvm_irqchip *chip;
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4968
ff5c2c0316ff0e arch/x86/kvm/x86.c Sasha Levin 2011-12-04 4969 chip = memdup_user(argp, sizeof(*chip));
ff5c2c0316ff0e arch/x86/kvm/x86.c Sasha Levin 2011-12-04 4970 if (IS_ERR(chip)) {
ff5c2c0316ff0e arch/x86/kvm/x86.c Sasha Levin 2011-12-04 4971 r = PTR_ERR(chip);
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4972 goto out;
ff5c2c0316ff0e arch/x86/kvm/x86.c Sasha Levin 2011-12-04 4973 }
ff5c2c0316ff0e arch/x86/kvm/x86.c Sasha Levin 2011-12-04 4974
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4975 r = -ENXIO;
826da32140dada arch/x86/kvm/x86.c Radim KrÄmÃÅ 2016-12-16 4976 if (!irqchip_kernel(kvm))
f0d662759a2465 arch/x86/kvm/x86.c Dave Hansen 2008-08-11 4977 goto set_irqchip_out;
f0d662759a2465 arch/x86/kvm/x86.c Dave Hansen 2008-08-11 4978 r = kvm_vm_ioctl_set_irqchip(kvm, chip);
f0d662759a2465 arch/x86/kvm/x86.c Dave Hansen 2008-08-11 4979 set_irqchip_out:
f0d662759a2465 arch/x86/kvm/x86.c Dave Hansen 2008-08-11 4980 kfree(chip);
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4981 break;
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 4982 }
e0f63cb9277b64 arch/x86/kvm/x86.c Sheng Yang 2008-03-04 4983 case KVM_GET_PIT: {
e0f63cb9277b64 arch/x86/kvm/x86.c Sheng Yang 2008-03-04 4984 r = -EFAULT;
f0d662759a2465 arch/x86/kvm/x86.c Dave Hansen 2008-08-11 4985 if (copy_from_user(&u.ps, argp, sizeof(struct kvm_pit_state)))
e0f63cb9277b64 arch/x86/kvm/x86.c Sheng Yang 2008-03-04 4986 goto out;
e0f63cb9277b64 arch/x86/kvm/x86.c Sheng Yang 2008-03-04 4987 r = -ENXIO;
e0f63cb9277b64 arch/x86/kvm/x86.c Sheng Yang 2008-03-04 4988 if (!kvm->arch.vpit)
e0f63cb9277b64 arch/x86/kvm/x86.c Sheng Yang 2008-03-04 4989 goto out;
f0d662759a2465 arch/x86/kvm/x86.c Dave Hansen 2008-08-11 4990 r = kvm_vm_ioctl_get_pit(kvm, &u.ps);
e0f63cb9277b64 arch/x86/kvm/x86.c Sheng Yang 2008-03-04 4991 if (r)
e0f63cb9277b64 arch/x86/kvm/x86.c Sheng Yang 2008-03-04 4992 goto out;
e0f63cb9277b64 arch/x86/kvm/x86.c Sheng Yang 2008-03-04 4993 r = -EFAULT;
f0d662759a2465 arch/x86/kvm/x86.c Dave Hansen 2008-08-11 4994 if (copy_to_user(argp, &u.ps, sizeof(struct kvm_pit_state)))
e0f63cb9277b64 arch/x86/kvm/x86.c Sheng Yang 2008-03-04 4995 goto out;
e0f63cb9277b64 arch/x86/kvm/x86.c Sheng Yang 2008-03-04 4996 r = 0;
e0f63cb9277b64 arch/x86/kvm/x86.c Sheng Yang 2008-03-04 4997 break;
e0f63cb9277b64 arch/x86/kvm/x86.c Sheng Yang 2008-03-04 4998 }
e0f63cb9277b64 arch/x86/kvm/x86.c Sheng Yang 2008-03-04 4999 case KVM_SET_PIT: {
e0f63cb9277b64 arch/x86/kvm/x86.c Sheng Yang 2008-03-04 5000 r = -EFAULT;
0e96f31ea4249b arch/x86/kvm/x86.c Jordan Borgner 2018-10-28 5001 if (copy_from_user(&u.ps, argp, sizeof(u.ps)))
e0f63cb9277b64 arch/x86/kvm/x86.c Sheng Yang 2008-03-04 5002 goto out;
e0f63cb9277b64 arch/x86/kvm/x86.c Sheng Yang 2008-03-04 5003 r = -ENXIO;
e0f63cb9277b64 arch/x86/kvm/x86.c Sheng Yang 2008-03-04 5004 if (!kvm->arch.vpit)
e0f63cb9277b64 arch/x86/kvm/x86.c Sheng Yang 2008-03-04 5005 goto out;
f0d662759a2465 arch/x86/kvm/x86.c Dave Hansen 2008-08-11 5006 r = kvm_vm_ioctl_set_pit(kvm, &u.ps);
e0f63cb9277b64 arch/x86/kvm/x86.c Sheng Yang 2008-03-04 5007 break;
e0f63cb9277b64 arch/x86/kvm/x86.c Sheng Yang 2008-03-04 5008 }
e9f4275732add0 arch/x86/kvm/x86.c Beth Kon 2009-07-07 5009 case KVM_GET_PIT2: {
e9f4275732add0 arch/x86/kvm/x86.c Beth Kon 2009-07-07 5010 r = -ENXIO;
e9f4275732add0 arch/x86/kvm/x86.c Beth Kon 2009-07-07 5011 if (!kvm->arch.vpit)
e9f4275732add0 arch/x86/kvm/x86.c Beth Kon 2009-07-07 5012 goto out;
e9f4275732add0 arch/x86/kvm/x86.c Beth Kon 2009-07-07 5013 r = kvm_vm_ioctl_get_pit2(kvm, &u.ps2);
e9f4275732add0 arch/x86/kvm/x86.c Beth Kon 2009-07-07 5014 if (r)
e9f4275732add0 arch/x86/kvm/x86.c Beth Kon 2009-07-07 5015 goto out;
e9f4275732add0 arch/x86/kvm/x86.c Beth Kon 2009-07-07 5016 r = -EFAULT;
e9f4275732add0 arch/x86/kvm/x86.c Beth Kon 2009-07-07 5017 if (copy_to_user(argp, &u.ps2, sizeof(u.ps2)))
e9f4275732add0 arch/x86/kvm/x86.c Beth Kon 2009-07-07 5018 goto out;
e9f4275732add0 arch/x86/kvm/x86.c Beth Kon 2009-07-07 5019 r = 0;
e9f4275732add0 arch/x86/kvm/x86.c Beth Kon 2009-07-07 5020 break;
e9f4275732add0 arch/x86/kvm/x86.c Beth Kon 2009-07-07 5021 }
e9f4275732add0 arch/x86/kvm/x86.c Beth Kon 2009-07-07 5022 case KVM_SET_PIT2: {
e9f4275732add0 arch/x86/kvm/x86.c Beth Kon 2009-07-07 5023 r = -EFAULT;
e9f4275732add0 arch/x86/kvm/x86.c Beth Kon 2009-07-07 5024 if (copy_from_user(&u.ps2, argp, sizeof(u.ps2)))
e9f4275732add0 arch/x86/kvm/x86.c Beth Kon 2009-07-07 5025 goto out;
e9f4275732add0 arch/x86/kvm/x86.c Beth Kon 2009-07-07 5026 r = -ENXIO;
e9f4275732add0 arch/x86/kvm/x86.c Beth Kon 2009-07-07 5027 if (!kvm->arch.vpit)
e9f4275732add0 arch/x86/kvm/x86.c Beth Kon 2009-07-07 5028 goto out;
e9f4275732add0 arch/x86/kvm/x86.c Beth Kon 2009-07-07 5029 r = kvm_vm_ioctl_set_pit2(kvm, &u.ps2);
e9f4275732add0 arch/x86/kvm/x86.c Beth Kon 2009-07-07 5030 break;
e9f4275732add0 arch/x86/kvm/x86.c Beth Kon 2009-07-07 5031 }
52d939a0bf4408 arch/x86/kvm/x86.c Marcelo Tosatti 2008-12-30 5032 case KVM_REINJECT_CONTROL: {
52d939a0bf4408 arch/x86/kvm/x86.c Marcelo Tosatti 2008-12-30 5033 struct kvm_reinject_control control;
52d939a0bf4408 arch/x86/kvm/x86.c Marcelo Tosatti 2008-12-30 5034 r = -EFAULT;
52d939a0bf4408 arch/x86/kvm/x86.c Marcelo Tosatti 2008-12-30 5035 if (copy_from_user(&control, argp, sizeof(control)))
52d939a0bf4408 arch/x86/kvm/x86.c Marcelo Tosatti 2008-12-30 5036 goto out;
52d939a0bf4408 arch/x86/kvm/x86.c Marcelo Tosatti 2008-12-30 5037 r = kvm_vm_ioctl_reinject(kvm, &control);
52d939a0bf4408 arch/x86/kvm/x86.c Marcelo Tosatti 2008-12-30 5038 break;
52d939a0bf4408 arch/x86/kvm/x86.c Marcelo Tosatti 2008-12-30 5039 }
d71ba788345c2b arch/x86/kvm/x86.c Paolo Bonzini 2015-07-29 5040 case KVM_SET_BOOT_CPU_ID:
d71ba788345c2b arch/x86/kvm/x86.c Paolo Bonzini 2015-07-29 5041 r = 0;
d71ba788345c2b arch/x86/kvm/x86.c Paolo Bonzini 2015-07-29 5042 mutex_lock(&kvm->lock);
557abc40d12135 arch/x86/kvm/x86.c Paolo Bonzini 2016-06-13 5043 if (kvm->created_vcpus)
d71ba788345c2b arch/x86/kvm/x86.c Paolo Bonzini 2015-07-29 5044 r = -EBUSY;
d71ba788345c2b arch/x86/kvm/x86.c Paolo Bonzini 2015-07-29 5045 else
d71ba788345c2b arch/x86/kvm/x86.c Paolo Bonzini 2015-07-29 5046 kvm->arch.bsp_vcpu_id = arg;
d71ba788345c2b arch/x86/kvm/x86.c Paolo Bonzini 2015-07-29 5047 mutex_unlock(&kvm->lock);
d71ba788345c2b arch/x86/kvm/x86.c Paolo Bonzini 2015-07-29 5048 break;
ffde22ac53b6d6 arch/x86/kvm/x86.c Ed Swierk 2009-10-15 5049 case KVM_XEN_HVM_CONFIG: {
51776043afa415 arch/x86/kvm/x86.c Paolo Bonzini 2017-10-26 5050 struct kvm_xen_hvm_config xhc;
ffde22ac53b6d6 arch/x86/kvm/x86.c Ed Swierk 2009-10-15 5051 r = -EFAULT;
51776043afa415 arch/x86/kvm/x86.c Paolo Bonzini 2017-10-26 5052 if (copy_from_user(&xhc, argp, sizeof(xhc)))
ffde22ac53b6d6 arch/x86/kvm/x86.c Ed Swierk 2009-10-15 5053 goto out;
ffde22ac53b6d6 arch/x86/kvm/x86.c Ed Swierk 2009-10-15 5054 r = -EINVAL;
51776043afa415 arch/x86/kvm/x86.c Paolo Bonzini 2017-10-26 5055 if (xhc.flags)
ffde22ac53b6d6 arch/x86/kvm/x86.c Ed Swierk 2009-10-15 5056 goto out;
51776043afa415 arch/x86/kvm/x86.c Paolo Bonzini 2017-10-26 5057 memcpy(&kvm->arch.xen_hvm_config, &xhc, sizeof(xhc));
ffde22ac53b6d6 arch/x86/kvm/x86.c Ed Swierk 2009-10-15 5058 r = 0;
ffde22ac53b6d6 arch/x86/kvm/x86.c Ed Swierk 2009-10-15 5059 break;
ffde22ac53b6d6 arch/x86/kvm/x86.c Ed Swierk 2009-10-15 5060 }
afbcf7ab8d1bc8 arch/x86/kvm/x86.c Glauber Costa 2009-10-16 5061 case KVM_SET_CLOCK: {
afbcf7ab8d1bc8 arch/x86/kvm/x86.c Glauber Costa 2009-10-16 5062 struct kvm_clock_data user_ns;
afbcf7ab8d1bc8 arch/x86/kvm/x86.c Glauber Costa 2009-10-16 5063 u64 now_ns;
afbcf7ab8d1bc8 arch/x86/kvm/x86.c Glauber Costa 2009-10-16 5064
afbcf7ab8d1bc8 arch/x86/kvm/x86.c Glauber Costa 2009-10-16 5065 r = -EFAULT;
afbcf7ab8d1bc8 arch/x86/kvm/x86.c Glauber Costa 2009-10-16 5066 if (copy_from_user(&user_ns, argp, sizeof(user_ns)))
afbcf7ab8d1bc8 arch/x86/kvm/x86.c Glauber Costa 2009-10-16 5067 goto out;
afbcf7ab8d1bc8 arch/x86/kvm/x86.c Glauber Costa 2009-10-16 5068
afbcf7ab8d1bc8 arch/x86/kvm/x86.c Glauber Costa 2009-10-16 5069 r = -EINVAL;
afbcf7ab8d1bc8 arch/x86/kvm/x86.c Glauber Costa 2009-10-16 5070 if (user_ns.flags)
afbcf7ab8d1bc8 arch/x86/kvm/x86.c Glauber Costa 2009-10-16 5071 goto out;
afbcf7ab8d1bc8 arch/x86/kvm/x86.c Glauber Costa 2009-10-16 5072
afbcf7ab8d1bc8 arch/x86/kvm/x86.c Glauber Costa 2009-10-16 5073 r = 0;
0bc48bea36d178 arch/x86/kvm/x86.c Radim KrÄmÃÅ 2017-05-16 5074 /*
0bc48bea36d178 arch/x86/kvm/x86.c Radim KrÄmÃÅ 2017-05-16 5075 * TODO: userspace has to take care of races with VCPU_RUN, so
0bc48bea36d178 arch/x86/kvm/x86.c Radim KrÄmÃÅ 2017-05-16 5076 * kvm_gen_update_masterclock() can be cut down to locked
0bc48bea36d178 arch/x86/kvm/x86.c Radim KrÄmÃÅ 2017-05-16 5077 * pvclock_update_vm_gtod_copy().
0bc48bea36d178 arch/x86/kvm/x86.c Radim KrÄmÃÅ 2017-05-16 5078 */
0bc48bea36d178 arch/x86/kvm/x86.c Radim KrÄmÃÅ 2017-05-16 5079 kvm_gen_update_masterclock(kvm);
e891a32e7ae0c6 arch/x86/kvm/x86.c Marcelo Tosatti 2017-04-17 5080 now_ns = get_kvmclock_ns(kvm);
108b249c453dd7 arch/x86/kvm/x86.c Paolo Bonzini 2016-09-01 5081 kvm->arch.kvmclock_offset += user_ns.clock - now_ns;
0bc48bea36d178 arch/x86/kvm/x86.c Radim KrÄmÃÅ 2017-05-16 5082 kvm_make_all_cpus_request(kvm, KVM_REQ_CLOCK_UPDATE);
afbcf7ab8d1bc8 arch/x86/kvm/x86.c Glauber Costa 2009-10-16 5083 break;
afbcf7ab8d1bc8 arch/x86/kvm/x86.c Glauber Costa 2009-10-16 5084 }
afbcf7ab8d1bc8 arch/x86/kvm/x86.c Glauber Costa 2009-10-16 5085 case KVM_GET_CLOCK: {
afbcf7ab8d1bc8 arch/x86/kvm/x86.c Glauber Costa 2009-10-16 5086 struct kvm_clock_data user_ns;
afbcf7ab8d1bc8 arch/x86/kvm/x86.c Glauber Costa 2009-10-16 5087 u64 now_ns;
afbcf7ab8d1bc8 arch/x86/kvm/x86.c Glauber Costa 2009-10-16 5088
e891a32e7ae0c6 arch/x86/kvm/x86.c Marcelo Tosatti 2017-04-17 5089 now_ns = get_kvmclock_ns(kvm);
108b249c453dd7 arch/x86/kvm/x86.c Paolo Bonzini 2016-09-01 5090 user_ns.clock = now_ns;
e3fd9a93a12a10 arch/x86/kvm/x86.c Paolo Bonzini 2016-11-09 5091 user_ns.flags = kvm->arch.use_master_clock ? KVM_CLOCK_TSC_STABLE : 0;
97e69aa62f8b5d arch/x86/kvm/x86.c Vasiliy Kulikov 2010-10-30 5092 memset(&user_ns.pad, 0, sizeof(user_ns.pad));
afbcf7ab8d1bc8 arch/x86/kvm/x86.c Glauber Costa 2009-10-16 5093
afbcf7ab8d1bc8 arch/x86/kvm/x86.c Glauber Costa 2009-10-16 5094 r = -EFAULT;
afbcf7ab8d1bc8 arch/x86/kvm/x86.c Glauber Costa 2009-10-16 5095 if (copy_to_user(argp, &user_ns, sizeof(user_ns)))
afbcf7ab8d1bc8 arch/x86/kvm/x86.c Glauber Costa 2009-10-16 5096 goto out;
afbcf7ab8d1bc8 arch/x86/kvm/x86.c Glauber Costa 2009-10-16 5097 r = 0;
afbcf7ab8d1bc8 arch/x86/kvm/x86.c Glauber Costa 2009-10-16 5098 break;
afbcf7ab8d1bc8 arch/x86/kvm/x86.c Glauber Costa 2009-10-16 5099 }
5acc5c063196b4 arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5100 case KVM_MEMORY_ENCRYPT_OP: {
5acc5c063196b4 arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5101 r = -ENOTTY;
5acc5c063196b4 arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5102 if (kvm_x86_ops->mem_enc_op)
5acc5c063196b4 arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5103 r = kvm_x86_ops->mem_enc_op(kvm, argp);
5acc5c063196b4 arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5104 break;
5acc5c063196b4 arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5105 }
69eaedee411c1f arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5106 case KVM_MEMORY_ENCRYPT_REG_REGION: {
69eaedee411c1f arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5107 struct kvm_enc_region region;
69eaedee411c1f arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5108
69eaedee411c1f arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5109 r = -EFAULT;
69eaedee411c1f arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5110 if (copy_from_user(&region, argp, sizeof(region)))
69eaedee411c1f arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5111 goto out;
69eaedee411c1f arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5112
69eaedee411c1f arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5113 r = -ENOTTY;
69eaedee411c1f arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5114 if (kvm_x86_ops->mem_enc_reg_region)
69eaedee411c1f arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5115 r = kvm_x86_ops->mem_enc_reg_region(kvm, &region);
69eaedee411c1f arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5116 break;
69eaedee411c1f arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5117 }
69eaedee411c1f arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5118 case KVM_MEMORY_ENCRYPT_UNREG_REGION: {
69eaedee411c1f arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5119 struct kvm_enc_region region;
69eaedee411c1f arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5120
69eaedee411c1f arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5121 r = -EFAULT;
69eaedee411c1f arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5122 if (copy_from_user(&region, argp, sizeof(region)))
69eaedee411c1f arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5123 goto out;
69eaedee411c1f arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5124
69eaedee411c1f arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5125 r = -ENOTTY;
69eaedee411c1f arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5126 if (kvm_x86_ops->mem_enc_unreg_region)
69eaedee411c1f arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5127 r = kvm_x86_ops->mem_enc_unreg_region(kvm, &region);
69eaedee411c1f arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5128 break;
69eaedee411c1f arch/x86/kvm/x86.c Brijesh Singh 2017-12-04 5129 }
faeb7833eee0d6 arch/x86/kvm/x86.c Roman Kagan 2018-02-01 5130 case KVM_HYPERV_EVENTFD: {
faeb7833eee0d6 arch/x86/kvm/x86.c Roman Kagan 2018-02-01 5131 struct kvm_hyperv_eventfd hvevfd;
faeb7833eee0d6 arch/x86/kvm/x86.c Roman Kagan 2018-02-01 5132
faeb7833eee0d6 arch/x86/kvm/x86.c Roman Kagan 2018-02-01 5133 r = -EFAULT;
faeb7833eee0d6 arch/x86/kvm/x86.c Roman Kagan 2018-02-01 5134 if (copy_from_user(&hvevfd, argp, sizeof(hvevfd)))
faeb7833eee0d6 arch/x86/kvm/x86.c Roman Kagan 2018-02-01 5135 goto out;
faeb7833eee0d6 arch/x86/kvm/x86.c Roman Kagan 2018-02-01 5136 r = kvm_vm_ioctl_hv_eventfd(kvm, &hvevfd);
faeb7833eee0d6 arch/x86/kvm/x86.c Roman Kagan 2018-02-01 5137 break;
faeb7833eee0d6 arch/x86/kvm/x86.c Roman Kagan 2018-02-01 5138 }
66bb8a065f5aed arch/x86/kvm/x86.c Eric Hankland 2019-07-10 5139 case KVM_SET_PMU_EVENT_FILTER:
66bb8a065f5aed arch/x86/kvm/x86.c Eric Hankland 2019-07-10 5140 r = kvm_vm_ioctl_set_pmu_event_filter(kvm, argp);
66bb8a065f5aed arch/x86/kvm/x86.c Eric Hankland 2019-07-10 5141 break;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5142 case KVM_SUBPAGES_GET_ACCESS: {
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5143 struct kvm_subpage spp_info, *pinfo;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5144 u32 total;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5145
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5146 r = -ENODEV;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5147 if (!kvm->arch.spp_active)
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5148 goto out;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5149
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5150 r = -EFAULT;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5151 if (copy_from_user(&spp_info, argp, sizeof(spp_info)))
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5152 goto out;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5153
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5154 r = -EINVAL;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5155 if (spp_info.flags != 0 ||
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5156 spp_info.npages > KVM_SUBPAGE_MAX_PAGES)
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5157 goto out;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5158 r = 0;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5159 if (!spp_info.npages)
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5160 goto out;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5161
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5162 total = sizeof(spp_info) +
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5163 sizeof(spp_info.access_map[0]) * spp_info.npages;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5164 pinfo = kvzalloc(total, GFP_KERNEL_ACCOUNT);
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5165
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5166 r = -ENOMEM;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5167 if (!pinfo)
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5168 goto out;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5169
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5170 r = -EFAULT;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5171 if (copy_from_user(pinfo, argp, total))
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5172 goto out;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5173
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5174 r = kvm_vm_ioctl_get_subpages(kvm,
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5175 pinfo->gfn_base,
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5176 pinfo->npages,
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5177 pinfo->access_map);
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5178 if (r != pinfo->npages)
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5179 goto out;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5180
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5181 r = -EFAULT;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5182 if (copy_to_user(argp, pinfo, total))
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5183 goto out;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5184
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 @5185 kfree(pinfo);
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 @5186 r = pinfo->npages;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5187 break;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5188 }
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5189 case KVM_SUBPAGES_SET_ACCESS: {
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5190 struct kvm_subpage spp_info, *pinfo;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5191 u32 total;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5192
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5193 r = -ENODEV;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5194 if (!kvm->arch.spp_active)
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5195 goto out;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5196
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5197 r = -EFAULT;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5198 if (copy_from_user(&spp_info, argp, sizeof(spp_info)))
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5199 goto out;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5200
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5201 r = -EINVAL;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5202 if (spp_info.flags != 0 ||
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5203 spp_info.npages > KVM_SUBPAGE_MAX_PAGES)
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5204 goto out;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5205
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5206 r = 0;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5207 if (!spp_info.npages)
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5208 goto out;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5209
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5210 total = sizeof(spp_info) +
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5211 sizeof(spp_info.access_map[0]) * spp_info.npages;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5212 pinfo = kvzalloc(total, GFP_KERNEL_ACCOUNT);
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5213
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5214 r = -ENOMEM;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5215 if (!pinfo)
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5216 goto out;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5217
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5218 r = -EFAULT;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5219 if (copy_from_user(pinfo, argp, total))
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5220 goto out;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5221
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5222 r = kvm_vm_ioctl_set_subpages(kvm,
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5223 pinfo->gfn_base,
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5224 pinfo->npages,
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5225 pinfo->access_map);
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5226 kfree(pinfo);
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5227 break;
148f2ec985f4ef arch/x86/kvm/x86.c Yang Weijiang 2019-12-31 5228 }
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 5229 default:
ad6260da1e23cf arch/x86/kvm/x86.c Paolo Bonzini 2017-03-27 5230 r = -ENOTTY;
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 5231 }
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 5232 out:
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 5233 return r;
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 5234 }
1fe779f8eccd16 drivers/kvm/x86.c Carsten Otte 2007-10-29 5235

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0-DAY kernel test infrastructure Open Source Technology Center
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