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First batch of KVM changes for 4.15

Browse source 
Common:
  - Python 3 support in kvm_stat
 
  - Accounting of slabs to kmemcg
 
 ARM:
  - Optimized arch timer handling for KVM/ARM
 
  - Improvements to the VGIC ITS code and introduction of an ITS reset
    ioctl
 
  - Unification of the 32-bit fault injection logic
 
  - More exact external abort matching logic
 
 PPC:
  - Support for running hashed page table (HPT) MMU mode on a host that
    is using the radix MMU mode;  single threaded mode on POWER 9 is
    added as a pre-requisite
 
  - Resolution of merge conflicts with the last second 4.14 HPT fixes
 
  - Fixes and cleanups
 
 s390:
  - Some initial preparation patches for exitless interrupts and crypto
 
  - New capability for AIS migration
 
  - Fixes
 
 x86:
  - Improved emulation of LAPIC timer mode changes, MCi_STATUS MSRs, and
    after-reset state
 
  - Refined dependencies for VMX features
 
  - Fixes for nested SMI injection
 
  - A lot of cleanups
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Merge tag 'kvm-4.15-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm

Pull KVM updates from Radim Krčmář:
 "First batch of KVM changes for 4.15

  Common:
   - Python 3 support in kvm_stat
   - Accounting of slabs to kmemcg

  ARM:
   - Optimized arch timer handling for KVM/ARM
   - Improvements to the VGIC ITS code and introduction of an ITS reset
     ioctl
   - Unification of the 32-bit fault injection logic
   - More exact external abort matching logic

  PPC:
   - Support for running hashed page table (HPT) MMU mode on a host that
     is using the radix MMU mode; single threaded mode on POWER 9 is
     added as a pre-requisite
   - Resolution of merge conflicts with the last second 4.14 HPT fixes
   - Fixes and cleanups

  s390:
   - Some initial preparation patches for exitless interrupts and crypto
   - New capability for AIS migration
   - Fixes

  x86:
   - Improved emulation of LAPIC timer mode changes, MCi_STATUS MSRs,
     and after-reset state
   - Refined dependencies for VMX features
   - Fixes for nested SMI injection
   - A lot of cleanups"

* tag 'kvm-4.15-1' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (89 commits)
  KVM: s390: provide a capability for AIS state migration
  KVM: s390: clear_io_irq() requests are not expected for adapter interrupts
  KVM: s390: abstract conversion between isc and enum irq_types
  KVM: s390: vsie: use common code functions for pinning
  KVM: s390: SIE considerations for AP Queue virtualization
  KVM: s390: document memory ordering for kvm_s390_vcpu_wakeup
  KVM: PPC: Book3S HV: Cosmetic post-merge cleanups
  KVM: arm/arm64: fix the incompatible matching for external abort
  KVM: arm/arm64: Unify 32bit fault injection
  KVM: arm/arm64: vgic-its: Implement KVM_DEV_ARM_ITS_CTRL_RESET
  KVM: arm/arm64: Document KVM_DEV_ARM_ITS_CTRL_RESET
  KVM: arm/arm64: vgic-its: Free caches when GITS_BASER Valid bit is cleared
  KVM: arm/arm64: vgic-its: New helper functions to free the caches
  KVM: arm/arm64: vgic-its: Remove kvm_its_unmap_device
  arm/arm64: KVM: Load the timer state when enabling the timer
  KVM: arm/arm64: Rework kvm_timer_should_fire
  KVM: arm/arm64: Get rid of kvm_timer_flush_hwstate
  KVM: arm/arm64: Avoid phys timer emulation in vcpu entry/exit
  KVM: arm/arm64: Move phys_timer_emulate function
  KVM: arm/arm64: Use kvm_arm_timer_set/get_reg for guest register traps
  ...
This commit is contained in:
Linus Torvalds 2017-11-16 13:00:24 -08:00
commit 974aa5630b
70 changed files with 2264 additions and 1270 deletions
Download patch file Download diff file Expand all files Collapse all files

25
arch/s390/include/asm/kvm_host.h
View file

@ -685,11 +685,28 @@ struct kvm_s390_crypto {
__u8 dea_kw;
};
#define APCB0_MASK_SIZE 1
struct kvm_s390_apcb0 {
__u64 apm[APCB0_MASK_SIZE]; /* 0x0000 */
__u64 aqm[APCB0_MASK_SIZE]; /* 0x0008 */
__u64 adm[APCB0_MASK_SIZE]; /* 0x0010 */
__u64 reserved18; /* 0x0018 */
};
#define APCB1_MASK_SIZE 4
struct kvm_s390_apcb1 {
__u64 apm[APCB1_MASK_SIZE]; /* 0x0000 */
__u64 aqm[APCB1_MASK_SIZE]; /* 0x0020 */
__u64 adm[APCB1_MASK_SIZE]; /* 0x0040 */
__u64 reserved60[4]; /* 0x0060 */
};
struct kvm_s390_crypto_cb {
__u8 reserved00[72]; /* 0x0000 */
__u8 dea_wrapping_key_mask[24]; /* 0x0048 */
__u8 aes_wrapping_key_mask[32]; /* 0x0060 */
__u8 reserved80[128]; /* 0x0080 */
struct kvm_s390_apcb0 apcb0; /* 0x0000 */
__u8 reserved20[0x0048 - 0x0020]; /* 0x0020 */
__u8 dea_wrapping_key_mask[24]; /* 0x0048 */
__u8 aes_wrapping_key_mask[32]; /* 0x0060 */
struct kvm_s390_apcb1 apcb1; /* 0x0080 */
};
/*

26
arch/s390/kvm/interrupt.c
View file

@ -213,6 +213,16 @@ static inline unsigned long pending_irqs(struct kvm_vcpu *vcpu)
vcpu->arch.local_int.pending_irqs;
}
static inline int isc_to_irq_type(unsigned long isc)
{
return IRQ_PEND_IO_ISC_0 + isc;
}
static inline int irq_type_to_isc(unsigned long irq_type)
{
return irq_type - IRQ_PEND_IO_ISC_0;
}
static unsigned long disable_iscs(struct kvm_vcpu *vcpu,
unsigned long active_mask)
{
@ -220,7 +230,7 @@ static unsigned long disable_iscs(struct kvm_vcpu *vcpu,
for (i = 0; i <= MAX_ISC; i++)
if (!(vcpu->arch.sie_block->gcr[6] & isc_to_isc_bits(i)))
active_mask &= ~(1UL << (IRQ_PEND_IO_ISC_0 + i));
active_mask &= ~(1UL << (isc_to_irq_type(i)));
return active_mask;
}
@ -901,7 +911,7 @@ static int __must_check __deliver_io(struct kvm_vcpu *vcpu,
fi = &vcpu->kvm->arch.float_int;
spin_lock(&fi->lock);
isc_list = &fi->lists[irq_type - IRQ_PEND_IO_ISC_0];
isc_list = &fi->lists[irq_type_to_isc(irq_type)];
inti = list_first_entry_or_null(isc_list,
struct kvm_s390_interrupt_info,
list);
@ -1074,6 +1084,12 @@ void kvm_s390_vcpu_wakeup(struct kvm_vcpu *vcpu)
* in kvm_vcpu_block without having the waitqueue set (polling)
*/
vcpu->valid_wakeup = true;
/*
* This is mostly to document, that the read in swait_active could
* be moved before other stores, leading to subtle races.
* All current users do not store or use an atomic like update
*/
smp_mb__after_atomic();
if (swait_active(&vcpu->wq)) {
/*
* The vcpu gave up the cpu voluntarily, mark it as a good
@ -1395,7 +1411,7 @@ static struct kvm_s390_interrupt_info *get_io_int(struct kvm *kvm,
list_del_init(&iter->list);
fi->counters[FIRQ_CNTR_IO] -= 1;
if (list_empty(isc_list))
clear_bit(IRQ_PEND_IO_ISC_0 + isc, &fi->pending_irqs);
clear_bit(isc_to_irq_type(isc), &fi->pending_irqs);
spin_unlock(&fi->lock);
return iter;
}
@ -1522,7 +1538,7 @@ static int __inject_io(struct kvm *kvm, struct kvm_s390_interrupt_info *inti)
isc = int_word_to_isc(inti->io.io_int_word);
list = &fi->lists[FIRQ_LIST_IO_ISC_0 + isc];
list_add_tail(&inti->list, list);
set_bit(IRQ_PEND_IO_ISC_0 + isc, &fi->pending_irqs);
set_bit(isc_to_irq_type(isc), &fi->pending_irqs);
spin_unlock(&fi->lock);
return 0;
}
@ -2175,6 +2191,8 @@ static int clear_io_irq(struct kvm *kvm, struct kvm_device_attr *attr)
return -EINVAL;
if (copy_from_user(&schid, (void __user *) attr->addr, sizeof(schid)))
return -EFAULT;
if (!schid)
return -EINVAL;
kfree(kvm_s390_get_io_int(kvm, isc_mask, schid));
/*
* If userspace is conforming to the architecture, we can have at most

1
arch/s390/kvm/kvm-s390.c
View file

@ -395,6 +395,7 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long ext)
case KVM_CAP_S390_USER_INSTR0:
case KVM_CAP_S390_CMMA_MIGRATION:
case KVM_CAP_S390_AIS:
case KVM_CAP_S390_AIS_MIGRATION:
r = 1;
break;
case KVM_CAP_S390_MEM_OP:

50
arch/s390/kvm/vsie.c
View file

@ -443,22 +443,14 @@ static int map_prefix(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
*
* Returns: - 0 on success
* - -EINVAL if the gpa is not valid guest storage
* - -ENOMEM if out of memory
*/
static int pin_guest_page(struct kvm *kvm, gpa_t gpa, hpa_t *hpa)
{
struct page *page;
hva_t hva;
int rc;
hva = gfn_to_hva(kvm, gpa_to_gfn(gpa));
if (kvm_is_error_hva(hva))
page = gfn_to_page(kvm, gpa_to_gfn(gpa));
if (is_error_page(page))
return -EINVAL;
rc = get_user_pages_fast(hva, 1, 1, &page);
if (rc < 0)
return rc;
else if (rc != 1)
return -ENOMEM;
*hpa = (hpa_t) page_to_virt(page) + (gpa & ~PAGE_MASK);
return 0;
}
@ -466,11 +458,7 @@ static int pin_guest_page(struct kvm *kvm, gpa_t gpa, hpa_t *hpa)
/* Unpins a page previously pinned via pin_guest_page, marking it as dirty. */
static void unpin_guest_page(struct kvm *kvm, gpa_t gpa, hpa_t hpa)
{
struct page *page;
page = virt_to_page(hpa);
set_page_dirty_lock(page);
put_page(page);
kvm_release_pfn_dirty(hpa >> PAGE_SHIFT);
/* mark the page always as dirty for migration */
mark_page_dirty(kvm, gpa_to_gfn(gpa));
}
@ -557,7 +545,7 @@ static int pin_blocks(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
rc = set_validity_icpt(scb_s, 0x003bU);
if (!rc) {
rc = pin_guest_page(vcpu->kvm, gpa, &hpa);
if (rc == -EINVAL)
if (rc)
rc = set_validity_icpt(scb_s, 0x0034U);
}
if (rc)
@ -574,10 +562,10 @@ static int pin_blocks(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
}
/* 256 bytes cannot cross page boundaries */
rc = pin_guest_page(vcpu->kvm, gpa, &hpa);
if (rc == -EINVAL)
if (rc) {
rc = set_validity_icpt(scb_s, 0x0080U);
if (rc)
goto unpin;
}
scb_s->itdba = hpa;
}
@ -592,10 +580,10 @@ static int pin_blocks(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
* if this block gets bigger, we have to shadow it.
*/
rc = pin_guest_page(vcpu->kvm, gpa, &hpa);
if (rc == -EINVAL)
if (rc) {
rc = set_validity_icpt(scb_s, 0x1310U);
if (rc)
goto unpin;
}
scb_s->gvrd = hpa;
}
@ -607,11 +595,11 @@ static int pin_blocks(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
}
/* 64 bytes cannot cross page boundaries */
rc = pin_guest_page(vcpu->kvm, gpa, &hpa);
if (rc == -EINVAL)
if (rc) {
rc = set_validity_icpt(scb_s, 0x0043U);
/* Validity 0x0044 will be checked by SIE */
if (rc)
goto unpin;
}
/* Validity 0x0044 will be checked by SIE */
scb_s->riccbd = hpa;
}
if ((scb_s->ecb & ECB_GS) && !(scb_s->ecd & ECD_HOSTREGMGMT)) {
@ -635,10 +623,10 @@ static int pin_blocks(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
* cross page boundaries
*/
rc = pin_guest_page(vcpu->kvm, gpa, &hpa);
if (rc == -EINVAL)
if (rc) {
rc = set_validity_icpt(scb_s, 0x10b0U);
if (rc)
goto unpin;
}
scb_s->sdnxo = hpa | sdnxc;
}
return 0;
@ -663,7 +651,6 @@ static void unpin_scb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page,
*
* Returns: - 0 if the scb was pinned.
* - > 0 if control has to be given to guest 2
* - -ENOMEM if out of memory
*/
static int pin_scb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page,
gpa_t gpa)
@ -672,14 +659,13 @@ static int pin_scb(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page,
int rc;
rc = pin_guest_page(vcpu->kvm, gpa, &hpa);
if (rc == -EINVAL) {
if (rc) {
rc = kvm_s390_inject_program_int(vcpu, PGM_ADDRESSING);
if (!rc)
rc = 1;
WARN_ON_ONCE(rc);
return 1;
}
if (!rc)
vsie_page->scb_o = (struct kvm_s390_sie_block *) hpa;
return rc;
vsie_page->scb_o = (struct kvm_s390_sie_block *) hpa;
return 0;
}
/*