Re: [PATCH v14 3/7] KVM: x86: switch to kvm_get_dirty_log_protect
Hi Paolo,
I changed your patch a little to use a Kconfig symbol,
hope that's fine with you.
- Mario
On 11/13/2014 05:57 PM, Mario Smarduch wrote:
> From: Paolo Bonzini
>
> We now have a generic function that does most of the work of
> kvm_vm_ioctl_get_dirty_log, now use it.
>
> Signed-off-by: Mario Smarduch
> ---
> arch/x86/include/asm/kvm_host.h |3 --
> arch/x86/kvm/Kconfig|1 +
> arch/x86/kvm/mmu.c |4 +--
> arch/x86/kvm/x86.c | 64
> ++-
> 4 files changed, 12 insertions(+), 60 deletions(-)
>
> diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
> index 7c492ed..934dc24 100644
> --- a/arch/x86/include/asm/kvm_host.h
> +++ b/arch/x86/include/asm/kvm_host.h
> @@ -805,9 +805,6 @@ void kvm_mmu_set_mask_ptes(u64 user_mask, u64
> accessed_mask,
>
> void kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
> void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
> -void kvm_mmu_write_protect_pt_masked(struct kvm *kvm,
> - struct kvm_memory_slot *slot,
> - gfn_t gfn_offset, unsigned long mask);
> void kvm_mmu_zap_all(struct kvm *kvm);
> void kvm_mmu_invalidate_mmio_sptes(struct kvm *kvm);
> unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
> diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
> index f9d16ff..d073594 100644
> --- a/arch/x86/kvm/Kconfig
> +++ b/arch/x86/kvm/Kconfig
> @@ -39,6 +39,7 @@ config KVM
> select PERF_EVENTS
> select HAVE_KVM_MSI
> select HAVE_KVM_CPU_RELAX_INTERCEPT
> + select KVM_GENERIC_DIRTYLOG_READ_PROTECT
> select KVM_VFIO
> ---help---
> Support hosting fully virtualized guest machines using hardware
> diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
> index 9314678..bf6b82c 100644
> --- a/arch/x86/kvm/mmu.c
> +++ b/arch/x86/kvm/mmu.c
> @@ -1224,7 +1224,7 @@ static bool __rmap_write_protect(struct kvm *kvm,
> unsigned long *rmapp,
> }
>
> /**
> - * kvm_mmu_write_protect_pt_masked - write protect selected PT level pages
> + * kvm_arch_mmu_write_protect_pt_masked - write protect selected PT level
> pages
> * @kvm: kvm instance
> * @slot: slot to protect
> * @gfn_offset: start of the BITS_PER_LONG pages we care about
> @@ -1233,7 +1233,7 @@ static bool __rmap_write_protect(struct kvm *kvm,
> unsigned long *rmapp,
> * Used when we do not need to care about huge page mappings: e.g. during
> dirty
> * logging we do not have any such mappings.
> */
> -void kvm_mmu_write_protect_pt_masked(struct kvm *kvm,
> +void kvm_arch_mmu_write_protect_pt_masked(struct kvm *kvm,
>struct kvm_memory_slot *slot,
>gfn_t gfn_offset, unsigned long mask)
> {
> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> index 8f1e22d..9f8ae9a 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -3606,77 +3606,31 @@ static int kvm_vm_ioctl_reinject(struct kvm *kvm,
> *
> * 1. Take a snapshot of the bit and clear it if needed.
> * 2. Write protect the corresponding page.
> - * 3. Flush TLB's if needed.
> - * 4. Copy the snapshot to the userspace.
> + * 3. Copy the snapshot to the userspace.
> + * 4. Flush TLB's if needed.
> *
> - * Between 2 and 3, the guest may write to the page using the remaining TLB
> - * entry. This is not a problem because the page will be reported dirty at
> - * step 4 using the snapshot taken before and step 3 ensures that successive
> - * writes will be logged for the next call.
> + * Between 2 and 4, the guest may write to the page using the remaining TLB
> + * entry. This is not a problem because the page is reported dirty using
> + * the snapshot taken before and step 4 ensures that writes done after
> + * exiting to userspace will be logged for the next call.
> */
> int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
> {
> - int r;
> - struct kvm_memory_slot *memslot;
> - unsigned long n, i;
> - unsigned long *dirty_bitmap;
> - unsigned long *dirty_bitmap_buffer;
> bool is_dirty = false;
> + int r;
>
> mutex_lock(&kvm->slots_lock);
>
> - r = -EINVAL;
> - if (log->slot >= KVM_USER_MEM_SLOTS)
> - goto out;
> -
> - memslot = id_to_memslot(kvm->memslots, log->slot);
> -
> - dirty_bitmap = memslot->dirty_bitmap;
> - r = -ENOENT;
> - if (!dirty_bitmap)
> - goto out;
> -
> - n = kvm_dirty_bitmap_bytes(memslot);
> -
> - dirty_bitmap_buffer = dirty_bitmap + n / sizeof(long);
> - memset(dirty_bitmap_buffer, 0, n);
> -
> - spin_lock(&kvm->mmu_lock);
> -
> - for (i = 0; i < n / sizeof(long); i++) {
> - unsigned long mask;
> - gfn_t offset;
> -
> - if (!dirty_bitmap[i])
> - continue;
> -
> - is_dirty = true;
> -
> -
[PATCH v14 7/7] KVM: arm: page logging 2nd stage fault handling
This patch adds support for handling 2nd stage page faults during migration,
it disables faulting in huge pages, and dissolves huge pages to page tables.
In case migration is canceled huge pages are used again.
Reviewed-by: Christoffer Dall
Signed-off-by: Mario Smarduch
---
arch/arm/kvm/mmu.c | 56
1 file changed, 48 insertions(+), 8 deletions(-)
diff --git a/arch/arm/kvm/mmu.c b/arch/arm/kvm/mmu.c
index 8137455..ff88e5b 100644
--- a/arch/arm/kvm/mmu.c
+++ b/arch/arm/kvm/mmu.c
@@ -47,6 +47,20 @@ static phys_addr_t hyp_idmap_vector;
#define kvm_pmd_huge(_x) (pmd_huge(_x) || pmd_trans_huge(_x))
#define kvm_pud_huge(_x) pud_huge(_x)
+#define IOMAP_ATTR 0x1
+#define LOGGING_ACTIVE 0x2
+#define SET_SPTE_FLAGS(l, i) ((l) << (LOGGING_ACTIVE - 1) | \
+(i) << (IOMAP_ATTR - 1))
+
+static bool kvm_get_logging_state(struct kvm_memory_slot *memslot)
+{
+#ifdef CONFIG_ARM
+ return !!memslot->dirty_bitmap;
+#else
+ return false;
+#endif
+}
+
static void kvm_tlb_flush_vmid_ipa(struct kvm *kvm, phys_addr_t ipa)
{
/*
@@ -626,10 +640,13 @@ static int stage2_set_pmd_huge(struct kvm *kvm, struct
kvm_mmu_memory_cache
}
static int stage2_set_pte(struct kvm *kvm, struct kvm_mmu_memory_cache *cache,
- phys_addr_t addr, const pte_t *new_pte, bool iomap)
+ phys_addr_t addr, const pte_t *new_pte,
+ unsigned long flags)
{
pmd_t *pmd;
pte_t *pte, old_pte;
+ bool iomap = flags & IOMAP_ATTR;
+ bool logging_active = flags & LOGGING_ACTIVE;
/* Create stage-2 page table mapping - Level 1 */
pmd = stage2_get_pmd(kvm, cache, addr);
@@ -641,6 +658,18 @@ static int stage2_set_pte(struct kvm *kvm, struct
kvm_mmu_memory_cache *cache,
return 0;
}
+ /*
+* While dirty memory logging, clear PMD entry for huge page and split
+* into smaller pages, to track dirty memory at page granularity.
+*/
+ if (logging_active && kvm_pmd_huge(*pmd)) {
+ phys_addr_t ipa = pmd_pfn(*pmd) << PAGE_SHIFT;
+
+ pmd_clear(pmd);
+ kvm_tlb_flush_vmid_ipa(kvm, ipa);
+ put_page(virt_to_page(pmd));
+ }
+
/* Create stage-2 page mappings - Level 2 */
if (pmd_none(*pmd)) {
if (!cache)
@@ -693,7 +722,7 @@ int kvm_phys_addr_ioremap(struct kvm *kvm, phys_addr_t
guest_ipa,
if (ret)
goto out;
spin_lock(&kvm->mmu_lock);
- ret = stage2_set_pte(kvm, &cache, addr, &pte, true);
+ ret = stage2_set_pte(kvm, &cache, addr, &pte, IOMAP_ATTR);
spin_unlock(&kvm->mmu_lock);
if (ret)
goto out;
@@ -908,6 +937,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu,
phys_addr_t fault_ipa,
struct vm_area_struct *vma;
pfn_t pfn;
pgprot_t mem_type = PAGE_S2;
+ bool logging_active = kvm_get_logging_state(memslot);
write_fault = kvm_is_write_fault(kvm_vcpu_get_hsr(vcpu));
if (fault_status == FSC_PERM && !write_fault) {
@@ -918,7 +948,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu,
phys_addr_t fault_ipa,
/* Let's check if we will get back a huge page backed by hugetlbfs */
down_read(¤t->mm->mmap_sem);
vma = find_vma_intersection(current->mm, hva, hva + 1);
- if (is_vm_hugetlb_page(vma)) {
+ if (is_vm_hugetlb_page(vma) && !logging_active) {
hugetlb = true;
gfn = (fault_ipa & PMD_MASK) >> PAGE_SHIFT;
} else {
@@ -964,7 +994,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu,
phys_addr_t fault_ipa,
spin_lock(&kvm->mmu_lock);
if (mmu_notifier_retry(kvm, mmu_seq))
goto out_unlock;
- if (!hugetlb && !force_pte)
+ if (!hugetlb && !force_pte && !logging_active)
hugetlb = transparent_hugepage_adjust(&pfn, &fault_ipa);
if (hugetlb) {
@@ -978,16 +1008,18 @@ static int user_mem_abort(struct kvm_vcpu *vcpu,
phys_addr_t fault_ipa,
ret = stage2_set_pmd_huge(kvm, memcache, fault_ipa, &new_pmd);
} else {
pte_t new_pte = pfn_pte(pfn, mem_type);
+ unsigned long flags = SET_SPTE_FLAGS(logging_active,
+ mem_type == PAGE_S2_DEVICE);
if (writable) {
kvm_set_s2pte_writable(&new_pte);
kvm_set_pfn_dirty(pfn);
}
coherent_cache_guest_page(vcpu, hva, PAGE_SIZE);
- ret = stage2_set_pte(kvm, memcache, fault_ipa, &new_pte,
-mem_type == PAGE_S2_DEVICE);
+ ret = stage2_set_pte(kvm, memcache, fault_ipa, &new_pte, flags);
}
-
+
[PATCH v14 6/7] KVM: arm: dirty logging write protect support
Add support to track dirty pages between user space KVM_GET_DIRTY_LOG ioctl
calls. We call kvm_get_dirty_log_protect() function to do most of the work.
Reviewed-by: Marc Zyngier
Signed-off-by: Mario Smarduch
---
arch/arm/kvm/Kconfig |1 +
arch/arm/kvm/arm.c | 46 ++
arch/arm/kvm/mmu.c | 22 ++
3 files changed, 69 insertions(+)
diff --git a/arch/arm/kvm/Kconfig b/arch/arm/kvm/Kconfig
index f27f336..a8d1ace 100644
--- a/arch/arm/kvm/Kconfig
+++ b/arch/arm/kvm/Kconfig
@@ -24,6 +24,7 @@ config KVM
select HAVE_KVM_ARCH_TLB_FLUSH_ALL
select KVM_MMIO
select KVM_ARM_HOST
+ select KVM_GENERIC_DIRTYLOG_READ_PROTECT
depends on ARM_VIRT_EXT && ARM_LPAE
---help---
Support hosting virtualized guest machines. You will also
diff --git a/arch/arm/kvm/arm.c b/arch/arm/kvm/arm.c
index a99e0cd..040c0f3 100644
--- a/arch/arm/kvm/arm.c
+++ b/arch/arm/kvm/arm.c
@@ -737,9 +737,55 @@ long kvm_arch_vcpu_ioctl(struct file *filp,
}
}
+/**
+ * kvm_vm_ioctl_get_dirty_log - get and clear the log of dirty pages in a slot
+ * @kvm: kvm instance
+ * @log: slot id and address to which we copy the log
+ *
+ * We need to keep it in mind that VCPU threads can write to the bitmap
+ * concurrently. So, to avoid losing data, we keep the following order for
+ * each bit:
+ *
+ * 1. Take a snapshot of the bit and clear it if needed.
+ * 2. Write protect the corresponding page.
+ * 3. Copy the snapshot to the userspace.
+ * 4. Flush TLB's if needed.
+ *
+ * Steps 1,2,3 are handled by kvm_get_dirty_log_protect().
+ * Between 2 and 4, the guest may write to the page using the remaining TLB
+ * entry. This is not a problem because the page is reported dirty using
+ * the snapshot taken before and step 4 ensures that writes done after
+ * exiting to userspace will be logged for the next call.
+ */
int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
{
+#ifdef CONFIG_ARM
+ int r;
+ bool is_dirty = false;
+
+ mutex_lock(&kvm->slots_lock);
+
+ r = kvm_get_dirty_log_protect(kvm, log, &is_dirty);
+ if (r)
+ goto out;
+
+ /*
+* kvm_get_dirty_log_protect() may fail and we may skip TLB flush
+* leaving few stale spte TLB entries which is harmless, given we're
+* just write protecting spte's, so few stale TLB's will be left in
+* original R/W state. And since the bitmap is corrupt userspace will
+* error out anyway (i.e. during migration or dirty page loging for
+* other reasons) terminating dirty page logging.
+*/
+ if (is_dirty)
+ kvm_flush_remote_tlbs(kvm);
+out:
+ mutex_unlock(&kvm->slots_lock);
+
+ return r;
+#else /* ARM64 */
return -EINVAL;
+#endif
}
static int kvm_vm_ioctl_set_device_addr(struct kvm *kvm,
diff --git a/arch/arm/kvm/mmu.c b/arch/arm/kvm/mmu.c
index 1e8b6a9..8137455 100644
--- a/arch/arm/kvm/mmu.c
+++ b/arch/arm/kvm/mmu.c
@@ -870,6 +870,28 @@ void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot)
spin_unlock(&kvm->mmu_lock);
kvm_flush_remote_tlbs(kvm);
}
+
+/**
+ * kvm_arch_mmu_write_protect_pt_masked() - write protect dirty pages
+ * @kvm: The KVM pointer
+ * @slot: The memory slot associated with mask
+ * @gfn_offset:The gfn offset in memory slot
+ * @mask: The mask of dirty pages at offset 'gfn_offset' in this memory
+ * slot to be write protected
+ *
+ * Walks bits set in mask write protects the associated pte's. Caller must
+ * acquire kvm_mmu_lock.
+ */
+void kvm_arch_mmu_write_protect_pt_masked(struct kvm *kvm,
+ struct kvm_memory_slot *slot,
+ gfn_t gfn_offset, unsigned long mask)
+{
+ phys_addr_t base_gfn = slot->base_gfn + gfn_offset;
+ phys_addr_t start = (base_gfn + __ffs(mask)) << PAGE_SHIFT;
+ phys_addr_t end = (base_gfn + __fls(mask) + 1) << PAGE_SHIFT;
+
+ stage2_wp_range(kvm, start, end);
+}
#endif
static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
[PATCH v14 4/7] KVM: arm: Add ARMv7 API to flush TLBs
This patch adds ARMv7 architecture TLB Flush function.
Acked-by: Marc Zyngier
Acked-by: Christoffer Dall
Signed-off-by: Mario Smarduch
---
arch/arm/include/asm/kvm_asm.h |1 +
arch/arm/include/asm/kvm_host.h | 12
arch/arm/kvm/Kconfig|1 +
arch/arm/kvm/interrupts.S | 11 +++
4 files changed, 25 insertions(+)
diff --git a/arch/arm/include/asm/kvm_asm.h b/arch/arm/include/asm/kvm_asm.h
index 3a67bec..25410b2 100644
--- a/arch/arm/include/asm/kvm_asm.h
+++ b/arch/arm/include/asm/kvm_asm.h
@@ -96,6 +96,7 @@ extern char __kvm_hyp_code_end[];
extern void __kvm_flush_vm_context(void);
extern void __kvm_tlb_flush_vmid_ipa(struct kvm *kvm, phys_addr_t ipa);
+extern void __kvm_tlb_flush_vmid(struct kvm *kvm);
extern int __kvm_vcpu_run(struct kvm_vcpu *vcpu);
#endif
diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h
index 6dfb404..3da6ea7 100644
--- a/arch/arm/include/asm/kvm_host.h
+++ b/arch/arm/include/asm/kvm_host.h
@@ -220,6 +220,18 @@ static inline void __cpu_init_hyp_mode(phys_addr_t
boot_pgd_ptr,
kvm_call_hyp((void*)hyp_stack_ptr, vector_ptr, pgd_ptr);
}
+/**
+ * kvm_flush_remote_tlbs() - flush all VM TLB entries
+ * @kvm: pointer to kvm structure.
+ *
+ * Interface to HYP function to flush all VM TLB entries without address
+ * parameter.
+ */
+static inline void kvm_flush_remote_tlbs(struct kvm *kvm)
+{
+ kvm_call_hyp(__kvm_tlb_flush_vmid, kvm);
+}
+
static inline int kvm_arch_dev_ioctl_check_extension(long ext)
{
return 0;
diff --git a/arch/arm/kvm/Kconfig b/arch/arm/kvm/Kconfig
index 466bd29..f27f336 100644
--- a/arch/arm/kvm/Kconfig
+++ b/arch/arm/kvm/Kconfig
@@ -21,6 +21,7 @@ config KVM
select PREEMPT_NOTIFIERS
select ANON_INODES
select HAVE_KVM_CPU_RELAX_INTERCEPT
+ select HAVE_KVM_ARCH_TLB_FLUSH_ALL
select KVM_MMIO
select KVM_ARM_HOST
depends on ARM_VIRT_EXT && ARM_LPAE
diff --git a/arch/arm/kvm/interrupts.S b/arch/arm/kvm/interrupts.S
index 01dcb0e..79caf79 100644
--- a/arch/arm/kvm/interrupts.S
+++ b/arch/arm/kvm/interrupts.S
@@ -66,6 +66,17 @@ ENTRY(__kvm_tlb_flush_vmid_ipa)
bx lr
ENDPROC(__kvm_tlb_flush_vmid_ipa)
+/**
+ * void __kvm_tlb_flush_vmid(struct kvm *kvm) - Flush per-VMID TLBs
+ *
+ * Reuses __kvm_tlb_flush_vmid_ipa() for ARMv7, without passing address
+ * parameter
+ */
+
+ENTRY(__kvm_tlb_flush_vmid)
+ b __kvm_tlb_flush_vmid_ipa
+ENDPROC(__kvm_tlb_flush_vmid)
+
/
* Flush TLBs and instruction caches of all CPUs inside the inner-shareable
* domain, for all VMIDs
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
[PATCH v14 5/7] KVM: arm: Add initial dirty page locking support
Add support for initial write protection of VM memslots. This patch
series assumes that huge PUDs will not be used in 2nd stage tables, which is
always valid on ARMv7.
Signed-off-by: Mario Smarduch
---
arch/arm/include/asm/kvm_host.h |2 +
arch/arm/include/asm/kvm_mmu.h| 20 +
arch/arm/include/asm/pgtable-3level.h |1 +
arch/arm/kvm/mmu.c| 138 +
4 files changed, 161 insertions(+)
diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h
index 3da6ea7..8fa6238 100644
--- a/arch/arm/include/asm/kvm_host.h
+++ b/arch/arm/include/asm/kvm_host.h
@@ -245,4 +245,6 @@ static inline void vgic_arch_setup(const struct vgic_params
*vgic)
int kvm_perf_init(void);
int kvm_perf_teardown(void);
+void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot);
+
#endif /* __ARM_KVM_HOST_H__ */
diff --git a/arch/arm/include/asm/kvm_mmu.h b/arch/arm/include/asm/kvm_mmu.h
index 5cc0b0f..08ab5e8 100644
--- a/arch/arm/include/asm/kvm_mmu.h
+++ b/arch/arm/include/asm/kvm_mmu.h
@@ -114,6 +114,26 @@ static inline void kvm_set_s2pmd_writable(pmd_t *pmd)
pmd_val(*pmd) |= L_PMD_S2_RDWR;
}
+static inline void kvm_set_s2pte_readonly(pte_t *pte)
+{
+ pte_val(*pte) = (pte_val(*pte) & ~L_PTE_S2_RDWR) | L_PTE_S2_RDONLY;
+}
+
+static inline bool kvm_s2pte_readonly(pte_t *pte)
+{
+ return (pte_val(*pte) & L_PTE_S2_RDWR) == L_PTE_S2_RDONLY;
+}
+
+static inline void kvm_set_s2pmd_readonly(pmd_t *pmd)
+{
+ pmd_val(*pmd) = (pmd_val(*pmd) & ~L_PMD_S2_RDWR) | L_PMD_S2_RDONLY;
+}
+
+static inline bool kvm_s2pmd_readonly(pmd_t *pmd)
+{
+ return (pmd_val(*pmd) & L_PMD_S2_RDWR) == L_PMD_S2_RDONLY;
+}
+
/* Open coded p*d_addr_end that can deal with 64bit addresses */
#define kvm_pgd_addr_end(addr, end)\
({ u64 __boundary = ((addr) + PGDIR_SIZE) & PGDIR_MASK;\
diff --git a/arch/arm/include/asm/pgtable-3level.h
b/arch/arm/include/asm/pgtable-3level.h
index 06e0bc0..d29c880 100644
--- a/arch/arm/include/asm/pgtable-3level.h
+++ b/arch/arm/include/asm/pgtable-3level.h
@@ -130,6 +130,7 @@
#define L_PTE_S2_RDONLY(_AT(pteval_t, 1) << 6) /*
HAP[1] */
#define L_PTE_S2_RDWR (_AT(pteval_t, 3) << 6) /* HAP[2:1] */
+#define L_PMD_S2_RDONLY(_AT(pmdval_t, 1) << 6) /*
HAP[1] */
#define L_PMD_S2_RDWR (_AT(pmdval_t, 3) << 6) /* HAP[2:1] */
/*
diff --git a/arch/arm/kvm/mmu.c b/arch/arm/kvm/mmu.c
index 16e7994..1e8b6a9 100644
--- a/arch/arm/kvm/mmu.c
+++ b/arch/arm/kvm/mmu.c
@@ -45,6 +45,7 @@ static phys_addr_t hyp_idmap_vector;
#define pgd_order get_order(PTRS_PER_PGD * sizeof(pgd_t))
#define kvm_pmd_huge(_x) (pmd_huge(_x) || pmd_trans_huge(_x))
+#define kvm_pud_huge(_x) pud_huge(_x)
static void kvm_tlb_flush_vmid_ipa(struct kvm *kvm, phys_addr_t ipa)
{
@@ -746,6 +747,131 @@ static bool transparent_hugepage_adjust(pfn_t *pfnp,
phys_addr_t *ipap)
return false;
}
+#ifdef CONFIG_ARM
+/**
+ * stage2_wp_ptes - write protect PMD range
+ * @pmd: pointer to pmd entry
+ * @addr: range start address
+ * @end: range end address
+ */
+static void stage2_wp_ptes(pmd_t *pmd, phys_addr_t addr, phys_addr_t end)
+{
+ pte_t *pte;
+
+ pte = pte_offset_kernel(pmd, addr);
+ do {
+ if (!pte_none(*pte)) {
+ if (!kvm_s2pte_readonly(pte))
+ kvm_set_s2pte_readonly(pte);
+ }
+ } while (pte++, addr += PAGE_SIZE, addr != end);
+}
+
+/**
+ * stage2_wp_pmds - write protect PUD range
+ * @pud: pointer to pud entry
+ * @addr: range start address
+ * @end: range end address
+ */
+static void stage2_wp_pmds(pud_t *pud, phys_addr_t addr, phys_addr_t end)
+{
+ pmd_t *pmd;
+ phys_addr_t next;
+
+ pmd = pmd_offset(pud, addr);
+
+ do {
+ next = kvm_pmd_addr_end(addr, end);
+ if (!pmd_none(*pmd)) {
+ if (kvm_pmd_huge(*pmd)) {
+ if (!kvm_s2pmd_readonly(pmd))
+ kvm_set_s2pmd_readonly(pmd);
+ } else {
+ stage2_wp_ptes(pmd, addr, next);
+ }
+ }
+ } while (pmd++, addr = next, addr != end);
+}
+
+/**
+ * stage2_wp_puds - write protect PGD range
+ * @pgd: pointer to pgd entry
+ * @addr: range start address
+ * @end: range end address
+ *
+ * Process PUD entries, for a huge PUD we cause a panic.
+ */
+static void stage2_wp_puds(pgd_t *pgd, phys_addr_t addr, phys_addr_t end)
+{
+ pud_t *pud;
+ phys_addr_t next;
+
+ pud = pud_offset(pgd, addr);
+ do {
+ next = kvm_pud_addr_end(addr, end);
+ if (!pud_none(*pud)) {
+ /* TODO:PU
[PATCH v14 3/7] KVM: x86: switch to kvm_get_dirty_log_protect
From: Paolo Bonzini
We now have a generic function that does most of the work of
kvm_vm_ioctl_get_dirty_log, now use it.
Signed-off-by: Mario Smarduch
---
arch/x86/include/asm/kvm_host.h |3 --
arch/x86/kvm/Kconfig|1 +
arch/x86/kvm/mmu.c |4 +--
arch/x86/kvm/x86.c | 64 ++-
4 files changed, 12 insertions(+), 60 deletions(-)
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 7c492ed..934dc24 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -805,9 +805,6 @@ void kvm_mmu_set_mask_ptes(u64 user_mask, u64 accessed_mask,
void kvm_mmu_reset_context(struct kvm_vcpu *vcpu);
void kvm_mmu_slot_remove_write_access(struct kvm *kvm, int slot);
-void kvm_mmu_write_protect_pt_masked(struct kvm *kvm,
-struct kvm_memory_slot *slot,
-gfn_t gfn_offset, unsigned long mask);
void kvm_mmu_zap_all(struct kvm *kvm);
void kvm_mmu_invalidate_mmio_sptes(struct kvm *kvm);
unsigned int kvm_mmu_calculate_mmu_pages(struct kvm *kvm);
diff --git a/arch/x86/kvm/Kconfig b/arch/x86/kvm/Kconfig
index f9d16ff..d073594 100644
--- a/arch/x86/kvm/Kconfig
+++ b/arch/x86/kvm/Kconfig
@@ -39,6 +39,7 @@ config KVM
select PERF_EVENTS
select HAVE_KVM_MSI
select HAVE_KVM_CPU_RELAX_INTERCEPT
+ select KVM_GENERIC_DIRTYLOG_READ_PROTECT
select KVM_VFIO
---help---
Support hosting fully virtualized guest machines using hardware
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 9314678..bf6b82c 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1224,7 +1224,7 @@ static bool __rmap_write_protect(struct kvm *kvm,
unsigned long *rmapp,
}
/**
- * kvm_mmu_write_protect_pt_masked - write protect selected PT level pages
+ * kvm_arch_mmu_write_protect_pt_masked - write protect selected PT level pages
* @kvm: kvm instance
* @slot: slot to protect
* @gfn_offset: start of the BITS_PER_LONG pages we care about
@@ -1233,7 +1233,7 @@ static bool __rmap_write_protect(struct kvm *kvm,
unsigned long *rmapp,
* Used when we do not need to care about huge page mappings: e.g. during dirty
* logging we do not have any such mappings.
*/
-void kvm_mmu_write_protect_pt_masked(struct kvm *kvm,
+void kvm_arch_mmu_write_protect_pt_masked(struct kvm *kvm,
struct kvm_memory_slot *slot,
gfn_t gfn_offset, unsigned long mask)
{
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 8f1e22d..9f8ae9a 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3606,77 +3606,31 @@ static int kvm_vm_ioctl_reinject(struct kvm *kvm,
*
* 1. Take a snapshot of the bit and clear it if needed.
* 2. Write protect the corresponding page.
- * 3. Flush TLB's if needed.
- * 4. Copy the snapshot to the userspace.
+ * 3. Copy the snapshot to the userspace.
+ * 4. Flush TLB's if needed.
*
- * Between 2 and 3, the guest may write to the page using the remaining TLB
- * entry. This is not a problem because the page will be reported dirty at
- * step 4 using the snapshot taken before and step 3 ensures that successive
- * writes will be logged for the next call.
+ * Between 2 and 4, the guest may write to the page using the remaining TLB
+ * entry. This is not a problem because the page is reported dirty using
+ * the snapshot taken before and step 4 ensures that writes done after
+ * exiting to userspace will be logged for the next call.
*/
int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm, struct kvm_dirty_log *log)
{
- int r;
- struct kvm_memory_slot *memslot;
- unsigned long n, i;
- unsigned long *dirty_bitmap;
- unsigned long *dirty_bitmap_buffer;
bool is_dirty = false;
+ int r;
mutex_lock(&kvm->slots_lock);
- r = -EINVAL;
- if (log->slot >= KVM_USER_MEM_SLOTS)
- goto out;
-
- memslot = id_to_memslot(kvm->memslots, log->slot);
-
- dirty_bitmap = memslot->dirty_bitmap;
- r = -ENOENT;
- if (!dirty_bitmap)
- goto out;
-
- n = kvm_dirty_bitmap_bytes(memslot);
-
- dirty_bitmap_buffer = dirty_bitmap + n / sizeof(long);
- memset(dirty_bitmap_buffer, 0, n);
-
- spin_lock(&kvm->mmu_lock);
-
- for (i = 0; i < n / sizeof(long); i++) {
- unsigned long mask;
- gfn_t offset;
-
- if (!dirty_bitmap[i])
- continue;
-
- is_dirty = true;
-
- mask = xchg(&dirty_bitmap[i], 0);
- dirty_bitmap_buffer[i] = mask;
-
- offset = i * BITS_PER_LONG;
- kvm_mmu_write_protect_pt_masked(kvm, memslot, offset, mask);
- }
-
- spin_unlock(&kvm->mmu_lock);
-
- /* See the comments in kvm_mmu_slot_remove_write_access(). */
[PATCH v14 1/7] KVM: Add architecture-defined TLB flush support
Allow architectures to override the generic kvm_flush_remote_tlbs()
function via HAVE_KVM_ARCH_TLB_FLUSH_ALL. ARMv7 will need this to
provide its own TLB flush interface.
Reviewed-by: Marc Zyngier
Reviewed-by: Paolo Bonzini
Signed-off-by: Mario Smarduch
---
virt/kvm/Kconfig|3 +++
virt/kvm/kvm_main.c |2 ++
2 files changed, 5 insertions(+)
diff --git a/virt/kvm/Kconfig b/virt/kvm/Kconfig
index fc0c5e6..3796a21 100644
--- a/virt/kvm/Kconfig
+++ b/virt/kvm/Kconfig
@@ -37,3 +37,6 @@ config HAVE_KVM_CPU_RELAX_INTERCEPT
config KVM_VFIO
bool
+
+config HAVE_KVM_ARCH_TLB_FLUSH_ALL
+ bool
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 33712fb..887df87 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -184,6 +184,7 @@ static bool make_all_cpus_request(struct kvm *kvm, unsigned
int req)
return called;
}
+#ifndef CONFIG_HAVE_KVM_ARCH_TLB_FLUSH_ALL
void kvm_flush_remote_tlbs(struct kvm *kvm)
{
long dirty_count = kvm->tlbs_dirty;
@@ -194,6 +195,7 @@ void kvm_flush_remote_tlbs(struct kvm *kvm)
cmpxchg(&kvm->tlbs_dirty, dirty_count, 0);
}
EXPORT_SYMBOL_GPL(kvm_flush_remote_tlbs);
+#endif
void kvm_reload_remote_mmus(struct kvm *kvm)
{
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
[PATCH v14 2/7] KVM: Add generic support for dirty page logging
kvm_get_dirty_log() provides generic handling of dirty bitmap, currently reused
by several architectures. Building on that we intrdoduce
kvm_get_dirty_log_protect() adding write protection to mark these pages dirty
for future write access, before next KVM_GET_DIRTY_LOG ioctl call from user
space.
Signed-off-by: Mario Smarduch
---
include/linux/kvm_host.h |9 ++
virt/kvm/Kconfig |6
virt/kvm/kvm_main.c | 80 ++
3 files changed, 95 insertions(+)
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index a4c33b3..c55dd75 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -590,6 +590,15 @@ int kvm_vm_ioctl_check_extension(struct kvm *kvm, long
ext);
int kvm_get_dirty_log(struct kvm *kvm,
struct kvm_dirty_log *log, int *is_dirty);
+
+int kvm_get_dirty_log_protect(struct kvm *kvm,
+ struct kvm_dirty_log *log, bool *is_dirty);
+
+void kvm_arch_mmu_write_protect_pt_masked(struct kvm *kvm,
+ struct kvm_memory_slot *slot,
+ gfn_t gfn_offset,
+ unsigned long mask);
+
int kvm_vm_ioctl_get_dirty_log(struct kvm *kvm,
struct kvm_dirty_log *log);
diff --git a/virt/kvm/Kconfig b/virt/kvm/Kconfig
index 3796a21..314950c 100644
--- a/virt/kvm/Kconfig
+++ b/virt/kvm/Kconfig
@@ -40,3 +40,9 @@ config KVM_VFIO
config HAVE_KVM_ARCH_TLB_FLUSH_ALL
bool
+
+config HAVE_KVM_ARCH_DIRTY_LOG_PROTECT
+ bool
+
+config KVM_GENERIC_DIRTYLOG_READ_PROTECT
+ bool
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 887df87..f50909c 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -981,6 +981,86 @@ out:
}
EXPORT_SYMBOL_GPL(kvm_get_dirty_log);
+#ifdef CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT
+/**
+ * kvm_get_dirty_log_protect - get a snapshot of dirty pages, and if any pages
+ * are dirty write protect them for next write.
+ * @kvm: pointer to kvm instance
+ * @log: slot id and address to which we copy the log
+ * @is_dirty: flag set if any page is dirty
+ *
+ * We need to keep it in mind that VCPU threads can write to the bitmap
+ * concurrently. So, to avoid losing track of dirty pages we keep the
+ * following order:
+ *
+ *1. Take a snapshot of the bit and clear it if needed.
+ *2. Write protect the corresponding page.
+ *3. Copy the snapshot to the userspace.
+ *4. Upon return caller flushes TLB's if needed.
+ *
+ * Between 2 and 4, the guest may write to the page using the remaining TLB
+ * entry. This is not a problem because the page is reported dirty using
+ * the snapshot taken before and step 4 ensures that writes done after
+ * exiting to userspace will be logged for the next call.
+ *
+ */
+int kvm_get_dirty_log_protect(struct kvm *kvm,
+ struct kvm_dirty_log *log, bool *is_dirty)
+{
+ struct kvm_memory_slot *memslot;
+ int r, i;
+ unsigned long n;
+ unsigned long *dirty_bitmap;
+ unsigned long *dirty_bitmap_buffer;
+
+ r = -EINVAL;
+ if (log->slot >= KVM_USER_MEM_SLOTS)
+ goto out;
+
+ memslot = id_to_memslot(kvm->memslots, log->slot);
+
+ dirty_bitmap = memslot->dirty_bitmap;
+ r = -ENOENT;
+ if (!dirty_bitmap)
+ goto out;
+
+ n = kvm_dirty_bitmap_bytes(memslot);
+
+ dirty_bitmap_buffer = dirty_bitmap + n / sizeof(long);
+ memset(dirty_bitmap_buffer, 0, n);
+
+ spin_lock(&kvm->mmu_lock);
+ *is_dirty = false;
+ for (i = 0; i < n / sizeof(long); i++) {
+ unsigned long mask;
+ gfn_t offset;
+
+ if (!dirty_bitmap[i])
+ continue;
+
+ *is_dirty = true;
+
+ mask = xchg(&dirty_bitmap[i], 0);
+ dirty_bitmap_buffer[i] = mask;
+
+ offset = i * BITS_PER_LONG;
+ kvm_arch_mmu_write_protect_pt_masked(kvm, memslot, offset,
+ mask);
+ }
+
+ spin_unlock(&kvm->mmu_lock);
+
+ r = -EFAULT;
+ if (copy_to_user(log->dirty_bitmap, dirty_bitmap_buffer, n))
+ goto out;
+
+ r = 0;
+out:
+ return r;
+}
+EXPORT_SYMBOL_GPL(kvm_get_dirty_log_protect);
+#endif
+
bool kvm_largepages_enabled(void)
{
return largepages_enabled;
--
1.7.9.5
--
To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
[PATCH v14 0/7] KVM/arm/x86: dirty page logging for ARMv7 (3.17.0-rc1)
Patch series adds support for ARMv7 and generic dirty page logging support. As we try to move towards generic dirty page logging additional logic is moved to generic code. Initially x86, armv7 KVM_GET_DIRTY_LOG reuses generic code, shortly followed by armv8 patches. Testing: - Generally live migration + checksumming of source/destination memory regions is used to validate correctness. - ARMv7 - qemu machvirt, VExpress - Exynos 5440, FastModels - lmbench + dirty guest memory cycling. On FastModels you must set 'migrate_set_downtime=1' for higher dirty rate (for example 2000 pges/100mS). See https://github.com/mjsmar/arm-dirtylog-tests for details. In addition to ARMv7 patch series was compiled for: - x86_64 - defconfig - ia64 - ia64-linux-gcc4.6.3 - defconfig, ia64 Kconfig defines BROKEN worked around that to make sure new changes don't break build. Eventually build breaks due to other reasons. - mips - mips64-linux-gcc4.6.3 - malta_kvm_defconfig - ppc - powerpc64-linux-gcc4.6.3 - pseries_defconfig - s390 - s390x-linux-gcc4.6.3 - defconfig - armv8 - aarch64-linux-gnu-gcc4.8.1 - defconfig ARMv7 Dirty page logging implementation overivew- - initially write protects memory region pages 2nd stage page tables - add support to read dirty page log and again write protect dirty pages for next pass. - second stage huge page are dissolved into small page tables to keep track of dirty pages at page granularity. Tracking at huge page granularity limits migration to an almost idle system. Small page size logging supports higher memory dirty rates. - In the event migration is canceled, normal behavior is resumed huge pages are rebuilt over time. Changes since v13: - Addressed comments from Cornelia, Paolo, Marc, and Christoffer - Most signifcant change is reduce number of arguments to stage2_set_pte - Another is introduce Kconfig symbol for generic kvm_get_dirty_log_protect() Changes since v12: - Added Paolos and James Hogan's comments to extend kvm_get_dirty_log() to make it further generic by adding write protection in addition to dirty bit map handling. This led to new generic function kvm_get_dirty_log_protect(). Changes since v11: - Implemented Alex's comments to simplify generic layer. Changes since v10: - addressed wanghaibin comments - addressed Christoffers comments Changes since v9: - Split patches into generic and architecture specific variants for TLB Flushing and dirty log read (patches 1,2 & 3,4,5,6) - rebased to 3.16.0-rc1 - Applied Christoffers comments. Mario Smarduch (6): KVM: Add architecture-defined TLB flush support KVM: Add generic support for dirty page logging KVM: arm: Add ARMv7 API to flush TLBs KVM: arm: Add initial dirty page locking support KVM: arm: dirty logging write protect support KVM: arm: page logging 2nd stage fault handling Paolo Bonzini (1): KVM: x86: switch to kvm_get_dirty_log_protect arch/arm/include/asm/kvm_asm.h|1 + arch/arm/include/asm/kvm_host.h | 14 +++ arch/arm/include/asm/kvm_mmu.h| 20 +++ arch/arm/include/asm/pgtable-3level.h |1 + arch/arm/kvm/Kconfig |2 + arch/arm/kvm/arm.c| 46 +++ arch/arm/kvm/interrupts.S | 11 ++ arch/arm/kvm/mmu.c| 216 +++-- arch/x86/include/asm/kvm_host.h |3 - arch/x86/kvm/Kconfig |1 + arch/x86/kvm/mmu.c|4 +- arch/x86/kvm/x86.c| 64 ++ include/linux/kvm_host.h |9 ++ virt/kvm/Kconfig |9 ++ virt/kvm/kvm_main.c | 82 + 15 files changed, 415 insertions(+), 68 deletions(-) -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
[PATCH] KVM: PPC: Book3S HV: Tracepoints for KVM HV guest interactions
This patch adds trace points in the guest entry and exit code and also
for exceptions handled by the host in kernel mode - hypercalls and page
faults. The new events are added to /sys/kernel/debug/tracing/events
under a new subsystem called kvm_hv.
Acked-by: Paul Mackerras
Signed-off-by: Suresh Warrier
---
arch/powerpc/kvm/book3s_64_mmu_hv.c | 12 +-
arch/powerpc/kvm/book3s_hv.c| 19 ++
arch/powerpc/kvm/trace_hv.h | 497
3 files changed, 525 insertions(+), 3 deletions(-)
create mode 100644 arch/powerpc/kvm/trace_hv.h
diff --git a/arch/powerpc/kvm/book3s_64_mmu_hv.c
b/arch/powerpc/kvm/book3s_64_mmu_hv.c
index 70feb7b..20cbad1 100644
--- a/arch/powerpc/kvm/book3s_64_mmu_hv.c
+++ b/arch/powerpc/kvm/book3s_64_mmu_hv.c
@@ -38,6 +38,7 @@
#include
#include "book3s_hv_cma.h"
+#include "trace_hv.h"
/* POWER7 has 10-bit LPIDs, PPC970 has 6-bit LPIDs */
#define MAX_LPID_970 63
@@ -627,6 +628,8 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct
kvm_vcpu *vcpu,
gfn = gpa >> PAGE_SHIFT;
memslot = gfn_to_memslot(kvm, gfn);
+ trace_kvm_page_fault_enter(vcpu, hpte, memslot, ea, dsisr);
+
/* No memslot means it's an emulated MMIO region */
if (!memslot || (memslot->flags & KVM_MEMSLOT_INVALID))
return kvmppc_hv_emulate_mmio(run, vcpu, gpa, ea,
@@ -639,6 +642,7 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct
kvm_vcpu *vcpu,
mmu_seq = kvm->mmu_notifier_seq;
smp_rmb();
+ ret = -EFAULT;
is_io = 0;
pfn = 0;
page = NULL;
@@ -662,7 +666,7 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct
kvm_vcpu *vcpu,
}
up_read(¤t->mm->mmap_sem);
if (!pfn)
- return -EFAULT;
+ goto out_put;
} else {
page = pages[0];
if (PageHuge(page)) {
@@ -690,14 +694,14 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run,
struct kvm_vcpu *vcpu,
pfn = page_to_pfn(page);
}
- ret = -EFAULT;
if (psize > pte_size)
goto out_put;
/* Check WIMG vs. the actual page we're accessing */
if (!hpte_cache_flags_ok(r, is_io)) {
if (is_io)
- return -EFAULT;
+ goto out_put;
+
/*
* Allow guest to map emulated device memory as
* uncacheable, but actually make it cacheable.
@@ -753,6 +757,8 @@ int kvmppc_book3s_hv_page_fault(struct kvm_run *run, struct
kvm_vcpu *vcpu,
SetPageDirty(page);
out_put:
+ trace_kvm_page_fault_exit(vcpu, hpte, ret);
+
if (page) {
/*
* We drop pages[0] here, not page because page might
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c
index 69d4085..5143d17 100644
--- a/arch/powerpc/kvm/book3s_hv.c
+++ b/arch/powerpc/kvm/book3s_hv.c
@@ -57,6 +57,9 @@
#include "book3s.h"
+#define CREATE_TRACE_POINTS
+#include "trace_hv.h"
+
/* #define EXIT_DEBUG */
/* #define EXIT_DEBUG_SIMPLE */
/* #define EXIT_DEBUG_INT */
@@ -1679,6 +1682,7 @@ static void kvmppc_run_core(struct kvmppc_vcore *vc)
list_for_each_entry(vcpu, &vc->runnable_threads, arch.run_list) {
kvmppc_start_thread(vcpu);
kvmppc_create_dtl_entry(vcpu, vc);
+ trace_kvm_guest_enter(vcpu);
}
/* Set this explicitly in case thread 0 doesn't have a vcpu */
@@ -1687,6 +1691,9 @@ static void kvmppc_run_core(struct kvmppc_vcore *vc)
vc->vcore_state = VCORE_RUNNING;
preempt_disable();
+
+ trace_kvmppc_run_core(vc, 0);
+
spin_unlock(&vc->lock);
kvm_guest_enter();
@@ -1732,6 +1739,8 @@ static void kvmppc_run_core(struct kvmppc_vcore *vc)
kvmppc_core_pending_dec(vcpu))
kvmppc_core_dequeue_dec(vcpu);
+ trace_kvm_guest_exit(vcpu);
+
ret = RESUME_GUEST;
if (vcpu->arch.trap)
ret = kvmppc_handle_exit_hv(vcpu->arch.kvm_run, vcpu,
@@ -1757,6 +1766,8 @@ static void kvmppc_run_core(struct kvmppc_vcore *vc)
wake_up(&vcpu->arch.cpu_run);
}
}
+
+ trace_kvmppc_run_core(vc, 1);
}
/*
@@ -1783,11 +1794,13 @@ static void kvmppc_vcore_blocked(struct kvmppc_vcore
*vc)
prepare_to_wait(&vc->wq, &wait, TASK_INTERRUPTIBLE);
vc->vcore_state = VCORE_SLEEPING;
+ trace_kvmppc_vcore_blocked(vc, 0);
spin_unlock(&vc->lock);
schedule();
finish_wait(&vc->wq, &wait);
spin_lock(&vc->lock);
vc->vcore_state = VCORE_INACTIVE;
+ trace_kvmppc_vcore_blocked(vc, 1);
}
static int kvmppc_run_vcpu(struct kvm_run *kvm_run, struct kvm_vcpu *vcpu)
@@ -1796,6 +1809,8 @@ static int kv
Fix Penguin Penalty 17th October2014 ( mail-archive.com )
Dear Sir Did your website get hit by Google Penguin update on October 17th 2014? What basically is Google Penguin Update? It is actually a code name for Google algorithm which aims at decreasing your websites search engine rankings that violate Googles guidelines by using black hat SEO techniques to rank your webpage by giving number of spammy links to the page. We are one of those few SEO companies that can help you avoid penalties from Google Updates like Penguin and Panda. Our clients have survived all the previous and present updates with ease. They have never been hit because we use 100% white hat SEO techniques to rank Webpages. Simple thing that we do to keep websites away from any Penguin or Panda penalties is follow Google guidelines and we give Google users the best answers to their queries. If you are looking to increase the quality of your websites and to get more targeted traffic or save your websites from these Google penalties email us back with your interest. We will be glad to serve you and help you grow your business. Regards Vince G SEO Manager ( TOB ) B7 Green Avenue, Amritsar 143001 Punjab NO CLICK in the subject to STOP EMAILS -- To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
