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2018-10-13 Thread Margaret Kwan Wing Han 
 I believe you are  busy, this is the only means I can reach you,I have a deal 
for you rely for more details
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Re: [PATCH v3] staging: iio: adt7316: fix parenthesis alignment

2018-10-13 Thread Jonathan Cameron 
On Mon, 8 Oct 2018 19:12:05 -0300
Renato Lui Geh  wrote:

> This patch fixes most "Alignment should match open parenthesis" check
> warnings found by checkpatch.pl in the addac/adt7316 driver.
> 
> Signed-off-by: Renato Lui Geh 
> ---
Please in future put a description here (below the ---) of the changes
made from earlier versions of the same patch.

Us reviewers are lazy and forgetful so it's really useful to have
a brief note to remind us on what was previously raised and to confirm
you have answered those review comments with changes.

Applied to the togreg branch of iio.git and pushed out as testing
for the autobuilders to play with.

Thanks,

Jonathan

>  drivers/staging/iio/addac/adt7316.c | 462 ++--
>  drivers/staging/iio/addac/adt7316.h |   2 +-
>  2 files changed, 233 insertions(+), 231 deletions(-)
> 
> diff --git a/drivers/staging/iio/addac/adt7316.c 
> b/drivers/staging/iio/addac/adt7316.c
> index 3f22d1088713..2f8a122f475d 100644
> --- a/drivers/staging/iio/addac/adt7316.c
> +++ b/drivers/staging/iio/addac/adt7316.c
> @@ -217,8 +217,8 @@ struct adt7316_limit_regs {
>  };
>  
>  static ssize_t adt7316_show_enabled(struct device *dev,
> - struct device_attribute *attr,
> - char *buf)
> + struct device_attribute *attr,
> + char *buf)
>  {
>   struct iio_dev *dev_info = dev_to_iio_dev(dev);
>   struct adt7316_chip_info *chip = iio_priv(dev_info);
> @@ -227,7 +227,7 @@ static ssize_t adt7316_show_enabled(struct device *dev,
>  }
>  
>  static ssize_t _adt7316_store_enabled(struct adt7316_chip_info *chip,
> - int enable)
> +   int enable)
>  {
>   u8 config1;
>   int ret;
> @@ -247,9 +247,9 @@ static ssize_t _adt7316_store_enabled(struct 
> adt7316_chip_info *chip,
>  }
>  
>  static ssize_t adt7316_store_enabled(struct device *dev,
> - struct device_attribute *attr,
> - const char *buf,
> - size_t len)
> +  struct device_attribute *attr,
> +  const char *buf,
> +  size_t len)
>  {
>   struct iio_dev *dev_info = dev_to_iio_dev(dev);
>   struct adt7316_chip_info *chip = iio_priv(dev_info);
> @@ -272,8 +272,8 @@ static IIO_DEVICE_ATTR(enabled, 0644,
>   0);
>  
>  static ssize_t adt7316_show_select_ex_temp(struct device *dev,
> - struct device_attribute *attr,
> - char *buf)
> +struct device_attribute *attr,
> +char *buf)
>  {
>   struct iio_dev *dev_info = dev_to_iio_dev(dev);
>   struct adt7316_chip_info *chip = iio_priv(dev_info);
> @@ -285,9 +285,9 @@ static ssize_t adt7316_show_select_ex_temp(struct device 
> *dev,
>  }
>  
>  static ssize_t adt7316_store_select_ex_temp(struct device *dev,
> - struct device_attribute *attr,
> - const char *buf,
> - size_t len)
> + struct device_attribute *attr,
> + const char *buf,
> + size_t len)
>  {
>   struct iio_dev *dev_info = dev_to_iio_dev(dev);
>   struct adt7316_chip_info *chip = iio_priv(dev_info);
> @@ -316,8 +316,8 @@ static IIO_DEVICE_ATTR(select_ex_temp, 0644,
>   0);
>  
>  static ssize_t adt7316_show_mode(struct device *dev,
> - struct device_attribute *attr,
> - char *buf)
> +  struct device_attribute *attr,
> +  char *buf)
>  {
>   struct iio_dev *dev_info = dev_to_iio_dev(dev);
>   struct adt7316_chip_info *chip = iio_priv(dev_info);
> @@ -329,9 +329,9 @@ static ssize_t adt7316_show_mode(struct device *dev,
>  }
>  
>  static ssize_t adt7316_store_mode(struct device *dev,
> - struct device_attribute *attr,
> - const char *buf,
> - size_t len)
> +   struct device_attribute *attr,
> +   const char *buf,
> +   size_t len)
>  {
>   struct iio_dev *dev_info = dev_to_iio_dev(dev);
>   struct adt7316_chip_info *chip = iio_priv(dev_info);
> @@ -357,8 +357,8 @@ static IIO_DEVICE_ATTR(mode, 0644,
>   0);
>  
>  static ssize_t adt7316_show_all_modes(struct device *dev,
> - struct device_attribute *attr,
> - char *buf)
> +   struct device_attribute *attr,
> +   char *buf)
>  {
>   return sprintf(buf, "single_channel\nround_robin\n");
>  }
> @@ -366,8 +366,8 @@ static ssize_t adt7316_show_all_modes(struct device *dev,
>  static IIO_DEVICE_ATTR(all_modes, 0444, adt7316_show_all_modes, NULL, 0);
>  
>  static ssize_t adt7316_show_ad_channel(str

[PATCH V4 00/15] x86/KVM/Hyper-v: Add HV ept tlb range flush hypercall support in KVM

2018-10-13 Thread lantianyu1986 
From: Lan Tianyu 

For nested memory virtualization, Hyper-v doesn't set write-protect
L1 hypervisor EPT page directory and page table node to track changes 
while it relies on guest to tell it changes via HvFlushGuestAddressLlist
hypercall. HvFlushGuestAddressLlist hypercall provides a way to flush
EPT page table with ranges which are specified by L1 hypervisor.

If L1 hypervisor uses INVEPT or HvFlushGuestAddressSpace hypercall to
flush EPT tlb, Hyper-V will invalidate associated EPT shadow page table
and sync L1's EPT table when next EPT page fault is triggered.
HvFlushGuestAddressLlist hypercall helps to avoid such redundant EPT
page fault and synchronization of shadow page table.


Change since v3:
1) Remove code of updating "tlbs_dirty" in 
kvm_flush_remote_tlbs_with_range()
2) Remove directly tlb flush in the kvm_handle_hva_range()
3) Move tlb flush in kvm_set_pte_rmapp() to 
kvm_mmu_notifier_change_pte()
4) Combine Vitaly's "don't pass EPT configuration info to
vmx_hv_remote_flush_tlb()" fix

Change since v2:
   1) Fix comment in the kvm_flush_remote_tlbs_with_range()
   2) Move HV_MAX_FLUSH_PAGES and HV_MAX_FLUSH_REP_COUNT to
hyperv-tlfs.h.
   3) Calculate HV_MAX_FLUSH_REP_COUNT in the macro definition
   4) Use HV_MAX_FLUSH_REP_COUNT to define length of gpa_list in
struct hv_guest_mapping_flush_list.

Change since v1:
   1) Convert "end_gfn" of struct kvm_tlb_range to "pages" in order
  to avoid confusion as to whether "end_gfn" is inclusive or exlusive.
   2) Add hyperv tlb range struct and replace kvm tlb range struct
  with new struct in order to avoid using kvm struct in the hyperv
  code directly.



Lan Tianyu (15):
  KVM: Add tlb_remote_flush_with_range callback in kvm_x86_ops
  KVM/MMU: Add tlb flush with range helper function
  KVM: Replace old tlb flush function with new one to flush a specified
range.
  KVM: Make kvm_set_spte_hva() return int
  KVM/MMU: Move tlb flush in kvm_set_pte_rmapp() to
kvm_mmu_notifier_change_pte()
  KVM/MMU: Flush tlb directly in the kvm_set_pte_rmapp()
  KVM/MMU: Flush tlb directly in the kvm_zap_gfn_range()
  KVM/MMU: Flush tlb directly in kvm_mmu_zap_collapsible_spte()
  KVM: Add flush_link and parent_pte in the struct kvm_mmu_page
  KVM: Add spte's point in the struct kvm_mmu_page
  KVM/MMU: Replace tlb flush function with range list flush function
  x86/hyper-v: Add HvFlushGuestAddressList hypercall support
  x86/Hyper-v: Add trace in the
hyperv_nested_flush_guest_mapping_range()
  KVM/VMX: Change hv flush logic when ept tables are mismatched.
  KVM/VMX: Add hv tlb range flush support

 arch/arm/include/asm/kvm_host.h |   2 +-
 arch/arm64/include/asm/kvm_host.h   |   2 +-
 arch/mips/include/asm/kvm_host.h|   2 +-
 arch/mips/kvm/mmu.c |   3 +-
 arch/powerpc/include/asm/kvm_host.h |   2 +-
 arch/powerpc/kvm/book3s.c   |   3 +-
 arch/powerpc/kvm/e500_mmu_host.c|   3 +-
 arch/x86/hyperv/nested.c|  85 ++
 arch/x86/include/asm/hyperv-tlfs.h  |  32 +
 arch/x86/include/asm/kvm_host.h |  12 +++-
 arch/x86/include/asm/mshyperv.h |  16 +
 arch/x86/include/asm/trace/hyperv.h |  14 
 arch/x86/kvm/mmu.c  | 138 ++--
 arch/x86/kvm/paging_tmpl.h  |  10 ++-
 arch/x86/kvm/vmx.c  |  70 +++---
 virt/kvm/arm/mmu.c  |   6 +-
 virt/kvm/kvm_main.c |   5 +-
 17 files changed, 360 insertions(+), 45 deletions(-)

-- 
2.14.4

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[PATCH V4 2/15] KVM/MMU: Add tlb flush with range helper function

2018-10-13 Thread lantianyu1986 
From: Lan Tianyu 

This patch is to add wrapper functions for tlb_remote_flush_with_range
callback.

Signed-off-by: Lan Tianyu 
---
Change sicne V3:
   Remove code of updating "tlbs_dirty"
Change since V2:
   Fix comment in the kvm_flush_remote_tlbs_with_range()
---
 arch/x86/kvm/mmu.c | 40 
 1 file changed, 40 insertions(+)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index c73d9f650de7..ff656d85903a 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -264,6 +264,46 @@ static void mmu_spte_set(u64 *sptep, u64 spte);
 static union kvm_mmu_page_role
 kvm_mmu_calc_root_page_role(struct kvm_vcpu *vcpu);
 
+
+static inline bool kvm_available_flush_tlb_with_range(void)
+{
+   return kvm_x86_ops->tlb_remote_flush_with_range;
+}
+
+static void kvm_flush_remote_tlbs_with_range(struct kvm *kvm,
+   struct kvm_tlb_range *range)
+{
+   int ret = -ENOTSUPP;
+
+   if (range && kvm_x86_ops->tlb_remote_flush_with_range)
+   ret = kvm_x86_ops->tlb_remote_flush_with_range(kvm, range);
+
+   if (ret)
+   kvm_flush_remote_tlbs(kvm);
+}
+
+static void kvm_flush_remote_tlbs_with_list(struct kvm *kvm,
+   struct list_head *flush_list)
+{
+   struct kvm_tlb_range range;
+
+   range.flush_list = flush_list;
+
+   kvm_flush_remote_tlbs_with_range(kvm, &range);
+}
+
+static void kvm_flush_remote_tlbs_with_address(struct kvm *kvm,
+   u64 start_gfn, u64 pages)
+{
+   struct kvm_tlb_range range;
+
+   range.start_gfn = start_gfn;
+   range.pages = pages;
+   range.flush_list = NULL;
+
+   kvm_flush_remote_tlbs_with_range(kvm, &range);
+}
+
 void kvm_mmu_set_mmio_spte_mask(u64 mmio_mask, u64 mmio_value)
 {
BUG_ON((mmio_mask & mmio_value) != mmio_value);
-- 
2.14.4

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[PATCH V4 3/15] KVM: Replace old tlb flush function with new one to flush a specified range.

2018-10-13 Thread lantianyu1986 
From: Lan Tianyu 

This patch is to replace kvm_flush_remote_tlbs() with kvm_flush_
remote_tlbs_with_address() in some functions without logic change.

Signed-off-by: Lan Tianyu 
---
 arch/x86/kvm/mmu.c | 31 +--
 arch/x86/kvm/paging_tmpl.h |  3 ++-
 2 files changed, 23 insertions(+), 11 deletions(-)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index ff656d85903a..9b9db36df103 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1490,8 +1490,12 @@ static bool __drop_large_spte(struct kvm *kvm, u64 
*sptep)
 
 static void drop_large_spte(struct kvm_vcpu *vcpu, u64 *sptep)
 {
-   if (__drop_large_spte(vcpu->kvm, sptep))
-   kvm_flush_remote_tlbs(vcpu->kvm);
+   if (__drop_large_spte(vcpu->kvm, sptep)) {
+   struct kvm_mmu_page *sp = page_header(__pa(sptep));
+
+   kvm_flush_remote_tlbs_with_address(vcpu->kvm, sp->gfn,
+   KVM_PAGES_PER_HPAGE(sp->role.level));
+   }
 }
 
 /*
@@ -1959,7 +1963,8 @@ static void rmap_recycle(struct kvm_vcpu *vcpu, u64 
*spte, gfn_t gfn)
rmap_head = gfn_to_rmap(vcpu->kvm, gfn, sp);
 
kvm_unmap_rmapp(vcpu->kvm, rmap_head, NULL, gfn, sp->role.level, 0);
-   kvm_flush_remote_tlbs(vcpu->kvm);
+   kvm_flush_remote_tlbs_with_address(vcpu->kvm, sp->gfn,
+   KVM_PAGES_PER_HPAGE(sp->role.level));
 }
 
 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end)
@@ -2475,7 +2480,7 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct 
kvm_vcpu *vcpu,
account_shadowed(vcpu->kvm, sp);
if (level == PT_PAGE_TABLE_LEVEL &&
  rmap_write_protect(vcpu, gfn))
-   kvm_flush_remote_tlbs(vcpu->kvm);
+   kvm_flush_remote_tlbs_with_address(vcpu->kvm, gfn, 1);
 
if (level > PT_PAGE_TABLE_LEVEL && need_sync)
flush |= kvm_sync_pages(vcpu, gfn, &invalid_list);
@@ -2595,7 +2600,7 @@ static void validate_direct_spte(struct kvm_vcpu *vcpu, 
u64 *sptep,
return;
 
drop_parent_pte(child, sptep);
-   kvm_flush_remote_tlbs(vcpu->kvm);
+   kvm_flush_remote_tlbs_with_address(vcpu->kvm, child->gfn, 1);
}
 }
 
@@ -3019,8 +3024,10 @@ static int mmu_set_spte(struct kvm_vcpu *vcpu, u64 
*sptep, unsigned pte_access,
ret = RET_PF_EMULATE;
kvm_make_request(KVM_REQ_TLB_FLUSH, vcpu);
}
+
if (set_spte_ret & SET_SPTE_NEED_REMOTE_TLB_FLUSH || flush)
-   kvm_flush_remote_tlbs(vcpu->kvm);
+   kvm_flush_remote_tlbs_with_address(vcpu->kvm, gfn,
+   KVM_PAGES_PER_HPAGE(level));
 
if (unlikely(is_mmio_spte(*sptep)))
ret = RET_PF_EMULATE;
@@ -5695,7 +5702,8 @@ void kvm_mmu_slot_remove_write_access(struct kvm *kvm,
 * on PT_WRITABLE_MASK anymore.
 */
if (flush)
-   kvm_flush_remote_tlbs(kvm);
+   kvm_flush_remote_tlbs_with_address(kvm, memslot->base_gfn,
+   memslot->npages);
 }
 
 static bool kvm_mmu_zap_collapsible_spte(struct kvm *kvm,
@@ -5759,7 +5767,8 @@ void kvm_mmu_slot_leaf_clear_dirty(struct kvm *kvm,
 * dirty_bitmap.
 */
if (flush)
-   kvm_flush_remote_tlbs(kvm);
+   kvm_flush_remote_tlbs_with_address(kvm, memslot->base_gfn,
+   memslot->npages);
 }
 EXPORT_SYMBOL_GPL(kvm_mmu_slot_leaf_clear_dirty);
 
@@ -5777,7 +5786,8 @@ void kvm_mmu_slot_largepage_remove_write_access(struct 
kvm *kvm,
lockdep_assert_held(&kvm->slots_lock);
 
if (flush)
-   kvm_flush_remote_tlbs(kvm);
+   kvm_flush_remote_tlbs_with_address(kvm, memslot->base_gfn,
+   memslot->npages);
 }
 EXPORT_SYMBOL_GPL(kvm_mmu_slot_largepage_remove_write_access);
 
@@ -5794,7 +5804,8 @@ void kvm_mmu_slot_set_dirty(struct kvm *kvm,
 
/* see kvm_mmu_slot_leaf_clear_dirty */
if (flush)
-   kvm_flush_remote_tlbs(kvm);
+   kvm_flush_remote_tlbs_with_address(kvm, memslot->base_gfn,
+   memslot->npages);
 }
 EXPORT_SYMBOL_GPL(kvm_mmu_slot_set_dirty);
 
diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h
index 7cf2185b7eb5..6bdca39829bc 100644
--- a/arch/x86/kvm/paging_tmpl.h
+++ b/arch/x86/kvm/paging_tmpl.h
@@ -894,7 +894,8 @@ static void FNAME(invlpg)(struct kvm_vcpu *vcpu, gva_t gva, 
hpa_t root_hpa)
pte_gpa += (sptep - sp->spt) * sizeof(pt_element_t);
 
if (mmu_page_zap_pte(vcpu->kvm, sp, sptep))
-   kvm_flush_remote_tlbs(vcpu->kvm);
+   kvm_flush_remote_tlbs_with_address(vcpu->kvm,
+   sp->gfn, 
KVM_PAGES_PER_HPAGE(sp->role.level));

[PATCH V4 4/15] KVM: Make kvm_set_spte_hva() return int

2018-10-13 Thread lantianyu1986 
From: Lan Tianyu 

The patch is to make kvm_set_spte_hva() return int and caller can
check return value to determine flush tlb or not.

Signed-off-by: Lan Tianyu 
---
 arch/arm/include/asm/kvm_host.h | 2 +-
 arch/arm64/include/asm/kvm_host.h   | 2 +-
 arch/mips/include/asm/kvm_host.h| 2 +-
 arch/mips/kvm/mmu.c | 3 ++-
 arch/powerpc/include/asm/kvm_host.h | 2 +-
 arch/powerpc/kvm/book3s.c   | 3 ++-
 arch/powerpc/kvm/e500_mmu_host.c| 3 ++-
 arch/x86/include/asm/kvm_host.h | 2 +-
 arch/x86/kvm/mmu.c  | 3 ++-
 virt/kvm/arm/mmu.c  | 6 --
 10 files changed, 17 insertions(+), 11 deletions(-)

diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h
index 3ad482d2f1eb..efb820bdad2c 100644
--- a/arch/arm/include/asm/kvm_host.h
+++ b/arch/arm/include/asm/kvm_host.h
@@ -225,7 +225,7 @@ int __kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu,
 #define KVM_ARCH_WANT_MMU_NOTIFIER
 int kvm_unmap_hva_range(struct kvm *kvm,
unsigned long start, unsigned long end);
-void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
+int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
 
 unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
 int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
diff --git a/arch/arm64/include/asm/kvm_host.h 
b/arch/arm64/include/asm/kvm_host.h
index 3d6d7336f871..2e506c0b3eb7 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -358,7 +358,7 @@ int __kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu,
 #define KVM_ARCH_WANT_MMU_NOTIFIER
 int kvm_unmap_hva_range(struct kvm *kvm,
unsigned long start, unsigned long end);
-void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
+int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
 
diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h
index 2c1c53d12179..71c3f21d80d5 100644
--- a/arch/mips/include/asm/kvm_host.h
+++ b/arch/mips/include/asm/kvm_host.h
@@ -933,7 +933,7 @@ enum kvm_mips_fault_result kvm_trap_emul_gva_fault(struct 
kvm_vcpu *vcpu,
 #define KVM_ARCH_WANT_MMU_NOTIFIER
 int kvm_unmap_hva_range(struct kvm *kvm,
unsigned long start, unsigned long end);
-void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
+int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
 int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
 int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
 
diff --git a/arch/mips/kvm/mmu.c b/arch/mips/kvm/mmu.c
index d8dcdb350405..97e538a8c1be 100644
--- a/arch/mips/kvm/mmu.c
+++ b/arch/mips/kvm/mmu.c
@@ -551,7 +551,7 @@ static int kvm_set_spte_handler(struct kvm *kvm, gfn_t gfn, 
gfn_t gfn_end,
   (pte_dirty(old_pte) && !pte_dirty(hva_pte));
 }
 
-void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
+int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
 {
unsigned long end = hva + PAGE_SIZE;
int ret;
@@ -559,6 +559,7 @@ void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, 
pte_t pte)
ret = handle_hva_to_gpa(kvm, hva, end, &kvm_set_spte_handler, &pte);
if (ret)
kvm_mips_callbacks->flush_shadow_all(kvm);
+   return 0;
 }
 
 static int kvm_age_hva_handler(struct kvm *kvm, gfn_t gfn, gfn_t gfn_end,
diff --git a/arch/powerpc/include/asm/kvm_host.h 
b/arch/powerpc/include/asm/kvm_host.h
index fac6f631ed29..ab23379c53a9 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -72,7 +72,7 @@ extern int kvm_unmap_hva_range(struct kvm *kvm,
   unsigned long start, unsigned long end);
 extern int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long 
end);
 extern int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
-extern void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
+extern int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
 
 #define HPTEG_CACHE_NUM(1 << 15)
 #define HPTEG_HASH_BITS_PTE13
diff --git a/arch/powerpc/kvm/book3s.c b/arch/powerpc/kvm/book3s.c
index fd9893bc7aa1..437613bb609a 100644
--- a/arch/powerpc/kvm/book3s.c
+++ b/arch/powerpc/kvm/book3s.c
@@ -850,9 +850,10 @@ int kvm_test_age_hva(struct kvm *kvm, unsigned long hva)
return kvm->arch.kvm_ops->test_age_hva(kvm, hva);
 }
 
-void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
+int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
 {
kvm->arch.kvm_ops->set_spte_hva(kvm, hva, pte);
+   return 0;
 }
 
 void kvmppc_mmu_destroy(struct kvm_vcpu *vcpu)
diff --git a/arch/powerpc/kvm/e500_mmu_host

[PATCH V4 1/15] KVM: Add tlb_remote_flush_with_range callback in kvm_x86_ops

2018-10-13 Thread lantianyu1986 
From: Lan Tianyu 

Add flush range call back in the kvm_x86_ops and platform can use it
to register its associated function. The parameter "kvm_tlb_range"
accepts a single range and flush list which contains a list of ranges.

Signed-off-by: Lan Tianyu 
---
Change since v1:
   Change "end_gfn" to "pages" to aviod confusion as to whether
"end_gfn" is inclusive or exlusive.
---
 arch/x86/include/asm/kvm_host.h | 8 
 1 file changed, 8 insertions(+)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 4b09d4aa9bf4..fea95aa77319 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -439,6 +439,12 @@ struct kvm_mmu {
u64 pdptrs[4]; /* pae */
 };
 
+struct kvm_tlb_range {
+   u64 start_gfn;
+   u64 pages;
+   struct list_head *flush_list;
+};
+
 enum pmc_type {
KVM_PMC_GP = 0,
KVM_PMC_FIXED,
@@ -1039,6 +1045,8 @@ struct kvm_x86_ops {
 
void (*tlb_flush)(struct kvm_vcpu *vcpu, bool invalidate_gpa);
int  (*tlb_remote_flush)(struct kvm *kvm);
+   int  (*tlb_remote_flush_with_range)(struct kvm *kvm,
+   struct kvm_tlb_range *range);
 
/*
 * Flush any TLB entries associated with the given GVA.
-- 
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[PATCH V4 9/15] KVM: Add flush_link and parent_pte in the struct kvm_mmu_page

2018-10-13 Thread lantianyu1986 
From: Lan Tianyu 

PV EPT tlb flush function will accept a list of flush ranges and
use struct kvm_mmu_page as the list entry.

Signed-off-by: Lan Tianyu 
---
 arch/x86/include/asm/kvm_host.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 19985c602ed6..8279235285f8 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -316,6 +316,7 @@ struct kvm_rmap_head {
 
 struct kvm_mmu_page {
struct list_head link;
+   struct list_head flush_link;
struct hlist_node hash_link;
bool unsync;
 
-- 
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[PATCH V4 8/15] KVM/MMU: Flush tlb directly in kvm_mmu_zap_collapsible_spte()

2018-10-13 Thread lantianyu1986 
From: Lan Tianyu 

kvm_mmu_zap_collapsible_spte() returns flush request to the
slot_handle_leaf() and the latter does flush on demand. When
range flush is available, make kvm_mmu_zap_collapsible_spte()
to flush tlb with range directly to avoid returning range back
to slot_handle_leaf().

Signed-off-by: Lan Tianyu 
---
 arch/x86/kvm/mmu.c | 8 +++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index c4f7679f12c3..e984a0067a43 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -5743,7 +5743,13 @@ static bool kvm_mmu_zap_collapsible_spte(struct kvm *kvm,
!kvm_is_reserved_pfn(pfn) &&
PageTransCompoundMap(pfn_to_page(pfn))) {
drop_spte(kvm, sptep);
-   need_tlb_flush = 1;
+
+   if (kvm_available_flush_tlb_with_range())
+   kvm_flush_remote_tlbs_with_address(kvm, sp->gfn,
+   KVM_PAGES_PER_HPAGE(sp->role.level));
+   else
+   need_tlb_flush = 1;
+
goto restart;
}
}
-- 
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[PATCH V4 6/15] KVM/MMU: Flush tlb directly in the kvm_set_pte_rmapp()

2018-10-13 Thread lantianyu1986 
From: Lan Tianyu 

This patch is to flush tlb directly in the kvm_set_pte_rmapp()
and return 0.

Signed-off-by: Lan Tianyu 
---
 arch/x86/kvm/mmu.c | 5 +
 1 file changed, 5 insertions(+)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 5d3a180c57e2..f3742ff4ec18 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1781,6 +1781,11 @@ static int kvm_set_pte_rmapp(struct kvm *kvm, struct 
kvm_rmap_head *rmap_head,
}
}
 
+   if (need_flush && kvm_available_flush_tlb_with_range()) {
+   kvm_flush_remote_tlbs_with_address(kvm, gfn, 1);
+   return 0;
+   }
+
return need_flush;
 }
 
-- 
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[PATCH V4 11/15] KVM/MMU: Replace tlb flush function with range list flush function

2018-10-13 Thread lantianyu1986 
From: Lan Tianyu 

This patch is to use range list flush function in the
mmu_sync_children(), kvm_mmu_commit_zap_page() and
FNAME(sync_page)().

Signed-off-by: Lan Tianyu 
---
 arch/x86/kvm/mmu.c | 26 +++---
 arch/x86/kvm/paging_tmpl.h |  5 -
 2 files changed, 27 insertions(+), 4 deletions(-)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 393f4048dd7a..69e4cff1115d 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1100,6 +1100,13 @@ static void update_gfn_disallow_lpage_count(struct 
kvm_memory_slot *slot,
}
 }
 
+static void kvm_mmu_queue_flush_request(struct kvm_mmu_page *sp,
+   struct list_head *flush_list)
+{
+   if (sp->sptep && is_last_spte(*sp->sptep, sp->role.level))
+   list_add(&sp->flush_link, flush_list);
+}
+
 void kvm_mmu_gfn_disallow_lpage(struct kvm_memory_slot *slot, gfn_t gfn)
 {
update_gfn_disallow_lpage_count(slot, gfn, 1);
@@ -2372,12 +2379,16 @@ static void mmu_sync_children(struct kvm_vcpu *vcpu,
 
while (mmu_unsync_walk(parent, &pages)) {
bool protected = false;
+   LIST_HEAD(flush_list);
 
-   for_each_sp(pages, sp, parents, i)
+   for_each_sp(pages, sp, parents, i) {
protected |= rmap_write_protect(vcpu, sp->gfn);
+   kvm_mmu_queue_flush_request(sp, &flush_list);
+   }
 
if (protected) {
-   kvm_flush_remote_tlbs(vcpu->kvm);
+   kvm_flush_remote_tlbs_with_list(vcpu->kvm,
+   &flush_list);
flush = false;
}
 
@@ -2713,6 +2724,7 @@ static void kvm_mmu_commit_zap_page(struct kvm *kvm,
struct list_head *invalid_list)
 {
struct kvm_mmu_page *sp, *nsp;
+   LIST_HEAD(flush_list);
 
if (list_empty(invalid_list))
return;
@@ -2726,7 +2738,15 @@ static void kvm_mmu_commit_zap_page(struct kvm *kvm,
 * In addition, kvm_flush_remote_tlbs waits for all vcpus to exit
 * guest mode and/or lockless shadow page table walks.
 */
-   kvm_flush_remote_tlbs(kvm);
+   if (kvm_available_flush_tlb_with_range()) {
+   list_for_each_entry(sp, invalid_list, link)
+   kvm_mmu_queue_flush_request(sp, &flush_list);
+
+   if (!list_empty(&flush_list))
+   kvm_flush_remote_tlbs_with_list(kvm, &flush_list);
+   } else {
+   kvm_flush_remote_tlbs(kvm);
+   }
 
list_for_each_entry_safe(sp, nsp, invalid_list, link) {
WARN_ON(!sp->role.invalid || sp->root_count);
diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h
index 833e8855bbc9..e44737ce6bad 100644
--- a/arch/x86/kvm/paging_tmpl.h
+++ b/arch/x86/kvm/paging_tmpl.h
@@ -973,6 +973,7 @@ static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct 
kvm_mmu_page *sp)
bool host_writable;
gpa_t first_pte_gpa;
int set_spte_ret = 0;
+   LIST_HEAD(flush_list);
 
/* direct kvm_mmu_page can not be unsync. */
BUG_ON(sp->role.direct);
@@ -1033,10 +1034,12 @@ static int FNAME(sync_page)(struct kvm_vcpu *vcpu, 
struct kvm_mmu_page *sp)
 pte_access, PT_PAGE_TABLE_LEVEL,
 gfn, spte_to_pfn(sp->spt[i]),
 true, false, host_writable);
+   if (set_spte_ret && kvm_available_flush_tlb_with_range())
+   kvm_mmu_queue_flush_request(sp, &flush_list);
}
 
if (set_spte_ret & SET_SPTE_NEED_REMOTE_TLB_FLUSH)
-   kvm_flush_remote_tlbs(vcpu->kvm);
+   kvm_flush_remote_tlbs_with_list(vcpu->kvm, &flush_list);
 
return nr_present;
 }
-- 
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[PATCH V4 10/15] KVM: Add spte's point in the struct kvm_mmu_page

2018-10-13 Thread lantianyu1986 
From: Lan Tianyu 

It's necessary to check whether mmu page is last or large page when add
mmu page into flush list. "spte" is needed for such check and so add
spte point in the struct kvm_mmu_page.

Signed-off-by: Lan Tianyu 
---
 arch/x86/include/asm/kvm_host.h | 1 +
 arch/x86/kvm/mmu.c  | 5 +
 arch/x86/kvm/paging_tmpl.h  | 2 ++
 3 files changed, 8 insertions(+)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index 8279235285f8..c986ebefc9ac 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -333,6 +333,7 @@ struct kvm_mmu_page {
int root_count;  /* Currently serving as active root */
unsigned int unsync_children;
struct kvm_rmap_head parent_ptes; /* rmap pointers to parent sptes */
+   u64 *sptep;
 
/* The page is obsolete if mmu_valid_gen != kvm->arch.mmu_valid_gen.  */
unsigned long mmu_valid_gen;
diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index e984a0067a43..393f4048dd7a 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -3165,6 +3165,7 @@ static int __direct_map(struct kvm_vcpu *vcpu, int write, 
int map_writable,
pseudo_gfn = base_addr >> PAGE_SHIFT;
sp = kvm_mmu_get_page(vcpu, pseudo_gfn, iterator.addr,
  iterator.level - 1, 1, ACC_ALL);
+   sp->sptep = iterator.sptep;
 
link_shadow_page(vcpu, iterator.sptep, sp);
}
@@ -3602,6 +3603,7 @@ static int mmu_alloc_direct_roots(struct kvm_vcpu *vcpu)
sp = kvm_mmu_get_page(vcpu, 0, 0,
vcpu->arch.mmu->shadow_root_level, 1, ACC_ALL);
++sp->root_count;
+   sp->sptep = NULL;
spin_unlock(&vcpu->kvm->mmu_lock);
vcpu->arch.mmu->root_hpa = __pa(sp->spt);
} else if (vcpu->arch.mmu->shadow_root_level == PT32E_ROOT_LEVEL) {
@@ -3618,6 +3620,7 @@ static int mmu_alloc_direct_roots(struct kvm_vcpu *vcpu)
i << 30, PT32_ROOT_LEVEL, 1, ACC_ALL);
root = __pa(sp->spt);
++sp->root_count;
+   sp->sptep = NULL;
spin_unlock(&vcpu->kvm->mmu_lock);
vcpu->arch.mmu->pae_root[i] = root | PT_PRESENT_MASK;
}
@@ -3658,6 +3661,7 @@ static int mmu_alloc_shadow_roots(struct kvm_vcpu *vcpu)
vcpu->arch.mmu->shadow_root_level, 0, ACC_ALL);
root = __pa(sp->spt);
++sp->root_count;
+   sp->sptep = NULL;
spin_unlock(&vcpu->kvm->mmu_lock);
vcpu->arch.mmu->root_hpa = root;
return 0;
@@ -3695,6 +3699,7 @@ static int mmu_alloc_shadow_roots(struct kvm_vcpu *vcpu)
  0, ACC_ALL);
root = __pa(sp->spt);
++sp->root_count;
+   sp->sptep = NULL;
spin_unlock(&vcpu->kvm->mmu_lock);
 
vcpu->arch.mmu->pae_root[i] = root | pm_mask;
diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h
index 6bdca39829bc..833e8855bbc9 100644
--- a/arch/x86/kvm/paging_tmpl.h
+++ b/arch/x86/kvm/paging_tmpl.h
@@ -633,6 +633,7 @@ static int FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr,
table_gfn = gw->table_gfn[it.level - 2];
sp = kvm_mmu_get_page(vcpu, table_gfn, addr, it.level-1,
  false, access);
+   sp->sptep = it.sptep;
}
 
/*
@@ -663,6 +664,7 @@ static int FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr,
 
sp = kvm_mmu_get_page(vcpu, direct_gfn, addr, it.level-1,
  true, direct_access);
+   sp->sptep = it.sptep;
link_shadow_page(vcpu, it.sptep, sp);
}
 
-- 
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[PATCH V4 7/15] KVM/MMU: Flush tlb directly in the kvm_zap_gfn_range()

2018-10-13 Thread lantianyu1986 
From: Lan Tianyu 

Originally, flush tlb is done by slot_handle_level_range(). This patch
is to flush tlb directly in the kvm_zap_gfn_range() when range
flush is available.

Signed-off-by: Lan Tianyu 
---
 arch/x86/kvm/mmu.c | 16 +---
 1 file changed, 13 insertions(+), 3 deletions(-)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index f3742ff4ec18..c4f7679f12c3 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -5647,6 +5647,7 @@ void kvm_zap_gfn_range(struct kvm *kvm, gfn_t gfn_start, 
gfn_t gfn_end)
 {
struct kvm_memslots *slots;
struct kvm_memory_slot *memslot;
+   bool flush = false;
int i;
 
spin_lock(&kvm->mmu_lock);
@@ -5654,18 +5655,27 @@ void kvm_zap_gfn_range(struct kvm *kvm, gfn_t 
gfn_start, gfn_t gfn_end)
slots = __kvm_memslots(kvm, i);
kvm_for_each_memslot(memslot, slots) {
gfn_t start, end;
+   bool flush_tlb = true;
 
start = max(gfn_start, memslot->base_gfn);
end = min(gfn_end, memslot->base_gfn + memslot->npages);
if (start >= end)
continue;
 
-   slot_handle_level_range(kvm, memslot, kvm_zap_rmapp,
-   PT_PAGE_TABLE_LEVEL, 
PT_MAX_HUGEPAGE_LEVEL,
-   start, end - 1, true);
+   if (kvm_available_flush_tlb_with_range())
+   flush_tlb = false;
+
+   flush = slot_handle_level_range(kvm, memslot,
+   kvm_zap_rmapp, PT_PAGE_TABLE_LEVEL,
+   PT_MAX_HUGEPAGE_LEVEL, start,
+   end - 1, flush_tlb);
}
}
 
+   if (flush && kvm_available_flush_tlb_with_range())
+   kvm_flush_remote_tlbs_with_address(kvm, gfn_start,
+   gfn_end - gfn_start + 1);
+
spin_unlock(&kvm->mmu_lock);
 }
 
-- 
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[PATCH V4 5/15] KVM/MMU: Move tlb flush in kvm_set_pte_rmapp() to kvm_mmu_notifier_change_pte()

2018-10-13 Thread lantianyu1986 
From: Lan Tianyu 

This patch is to move tlb flush in kvm_set_pte_rmapp() to
kvm_mmu_notifier_change_pte() in order to avoid redundant tlb flush.

Signed-off-by: Lan Tianyu 
---
 arch/x86/kvm/mmu.c  | 8 ++--
 virt/kvm/kvm_main.c | 5 -
 2 files changed, 6 insertions(+), 7 deletions(-)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index fd24a4dc45e9..5d3a180c57e2 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -1781,10 +1781,7 @@ static int kvm_set_pte_rmapp(struct kvm *kvm, struct 
kvm_rmap_head *rmap_head,
}
}
 
-   if (need_flush)
-   kvm_flush_remote_tlbs(kvm);
-
-   return 0;
+   return need_flush;
 }
 
 struct slot_rmap_walk_iterator {
@@ -1920,8 +1917,7 @@ int kvm_unmap_hva_range(struct kvm *kvm, unsigned long 
start, unsigned long end)
 
 int kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte)
 {
-   kvm_handle_hva(kvm, hva, (unsigned long)&pte, kvm_set_pte_rmapp);
-   return 0;
+   return kvm_handle_hva(kvm, hva, (unsigned long)&pte, kvm_set_pte_rmapp);
 }
 
 static int kvm_age_rmapp(struct kvm *kvm, struct kvm_rmap_head *rmap_head,
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index acc951cc2663..bd026d74541e 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -354,7 +354,10 @@ static void kvm_mmu_notifier_change_pte(struct 
mmu_notifier *mn,
idx = srcu_read_lock(&kvm->srcu);
spin_lock(&kvm->mmu_lock);
kvm->mmu_notifier_seq++;
-   kvm_set_spte_hva(kvm, address, pte);
+
+   if (kvm_set_spte_hva(kvm, address, pte))
+   kvm_flush_remote_tlbs(kvm);
+
spin_unlock(&kvm->mmu_lock);
srcu_read_unlock(&kvm->srcu, idx);
 }
-- 
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[PATCH V4 12/15] x86/hyper-v: Add HvFlushGuestAddressList hypercall support

2018-10-13 Thread lantianyu1986 
From: Lan Tianyu 

Hyper-V provides HvFlushGuestAddressList() hypercall to flush EPT tlb
with specified ranges. This patch is to add the hypercall support.

Reviewed-by:  Michael Kelley 
Signed-off-by: Lan Tianyu 
---
Change since v2:
  Fix some coding style issues
- Move HV_MAX_FLUSH_PAGES and HV_MAX_FLUSH_REP_COUNT to
hyperv-tlfs.h.
- Calculate HV_MAX_FLUSH_REP_COUNT in the macro definition
- Use HV_MAX_FLUSH_REP_COUNT to define length of gpa_list in
struct hv_guest_mapping_flush_list.

Change since v1:
   Add hyperv tlb flush struct to avoid use kvm tlb flush struct
in the hyperv file.
---
 arch/x86/hyperv/nested.c   | 84 ++
 arch/x86/include/asm/hyperv-tlfs.h | 32 +++
 arch/x86/include/asm/mshyperv.h| 16 
 3 files changed, 132 insertions(+)

diff --git a/arch/x86/hyperv/nested.c b/arch/x86/hyperv/nested.c
index b8e60cc50461..a6fdfec63c7d 100644
--- a/arch/x86/hyperv/nested.c
+++ b/arch/x86/hyperv/nested.c
@@ -7,6 +7,7 @@
  *
  * Author : Lan Tianyu 
  */
+#define pr_fmt(fmt)  "Hyper-V: " fmt
 
 
 #include 
@@ -54,3 +55,86 @@ int hyperv_flush_guest_mapping(u64 as)
return ret;
 }
 EXPORT_SYMBOL_GPL(hyperv_flush_guest_mapping);
+
+static int fill_flush_list(union hv_gpa_page_range gpa_list[],
+   int offset, u64 start_gfn, u64 pages)
+{
+   int gpa_n = offset;
+   u64 cur = start_gfn;
+   u64 additional_pages;
+
+   do {
+   /*
+* If flush requests exceed max flush count, go back to
+* flush tlbs without range.
+*/
+   if (gpa_n >= HV_MAX_FLUSH_REP_COUNT)
+   return -ENOSPC;
+
+   additional_pages = min_t(u64, pages, HV_MAX_FLUSH_PAGES) - 1;
+
+   gpa_list[gpa_n].page.additional_pages = additional_pages;
+   gpa_list[gpa_n].page.largepage = false;
+   gpa_list[gpa_n].page.basepfn = cur;
+
+   pages -= additional_pages + 1;
+   cur += additional_pages + 1;
+   gpa_n++;
+   } while (pages > 0);
+
+   return gpa_n;
+}
+
+int hyperv_flush_guest_mapping_range(u64 as, struct hyperv_tlb_range *range)
+{
+   struct hv_guest_mapping_flush_list **flush_pcpu;
+   struct hv_guest_mapping_flush_list *flush;
+   u64 status = 0;
+   unsigned long flags;
+   int ret = -ENOTSUPP;
+   int gpa_n = 0;
+
+   if (!hv_hypercall_pg)
+   goto fault;
+
+   local_irq_save(flags);
+
+   flush_pcpu = (struct hv_guest_mapping_flush_list **)
+   this_cpu_ptr(hyperv_pcpu_input_arg);
+
+   flush = *flush_pcpu;
+   if (unlikely(!flush)) {
+   local_irq_restore(flags);
+   goto fault;
+   }
+
+   flush->address_space = as;
+   flush->flags = 0;
+
+   if (!range->flush_list)
+   gpa_n = fill_flush_list(flush->gpa_list, gpa_n,
+   range->start_gfn, range->pages);
+   else if (range->parse_flush_list_func)
+   gpa_n = range->parse_flush_list_func(flush->gpa_list, gpa_n,
+   range->flush_list, fill_flush_list);
+   else
+   gpa_n = -1;
+
+   if (gpa_n < 0) {
+   local_irq_restore(flags);
+   goto fault;
+   }
+
+   status = hv_do_rep_hypercall(HVCALL_FLUSH_GUEST_PHYSICAL_ADDRESS_LIST,
+gpa_n, 0, flush, NULL);
+
+   local_irq_restore(flags);
+
+   if (!(status & HV_HYPERCALL_RESULT_MASK))
+   ret = 0;
+   else
+   ret = status;
+fault:
+   return ret;
+}
+EXPORT_SYMBOL_GPL(hyperv_flush_guest_mapping_range);
diff --git a/arch/x86/include/asm/hyperv-tlfs.h 
b/arch/x86/include/asm/hyperv-tlfs.h
index 00e01d215f74..cf59250c284a 100644
--- a/arch/x86/include/asm/hyperv-tlfs.h
+++ b/arch/x86/include/asm/hyperv-tlfs.h
@@ -10,6 +10,7 @@
 #define _ASM_X86_HYPERV_TLFS_H
 
 #include 
+#include 
 
 /*
  * The below CPUID leaves are present if VersionAndFeatures.HypervisorPresent
@@ -353,6 +354,7 @@ struct hv_tsc_emulation_status {
 #define HVCALL_POST_MESSAGE0x005c
 #define HVCALL_SIGNAL_EVENT0x005d
 #define HVCALL_FLUSH_GUEST_PHYSICAL_ADDRESS_SPACE 0x00af
+#define HVCALL_FLUSH_GUEST_PHYSICAL_ADDRESS_LIST 0x00b0
 
 #define HV_X64_MSR_VP_ASSIST_PAGE_ENABLE   0x0001
 #define HV_X64_MSR_VP_ASSIST_PAGE_ADDRESS_SHIFT12
@@ -752,6 +754,36 @@ struct hv_guest_mapping_flush {
u64 flags;
 };
 
+/*
+ *  HV_MAX_FLUSH_PAGES = "additional_pages" + 1. It's limited
+ *  by the bitwidth of "additional_pages" in union hv_gpa_page_range.
+ */
+#define HV_MAX_FLUSH_PAGES (2048)
+
+/* HvFlushGuestPhysicalAddressList hypercall */
+union hv_gpa_page_range {
+   u64 address_space;
+   struct {
+   u64 additional_pages:11;
+   u64 largepage:1;

[PATCH V4 13/15] x86/Hyper-v: Add trace in the hyperv_nested_flush_guest_mapping_range()

2018-10-13 Thread lantianyu1986 
From: Lan Tianyu 

This patch is to trace log in the hyperv_nested_flush_
guest_mapping_range().

Signed-off-by: Lan Tianyu 
---
 arch/x86/hyperv/nested.c|  1 +
 arch/x86/include/asm/trace/hyperv.h | 14 ++
 2 files changed, 15 insertions(+)

diff --git a/arch/x86/hyperv/nested.c b/arch/x86/hyperv/nested.c
index a6fdfec63c7d..4850c74508f3 100644
--- a/arch/x86/hyperv/nested.c
+++ b/arch/x86/hyperv/nested.c
@@ -135,6 +135,7 @@ int hyperv_flush_guest_mapping_range(u64 as, struct 
hyperv_tlb_range *range)
else
ret = status;
 fault:
+   trace_hyperv_nested_flush_guest_mapping_range(as, ret);
return ret;
 }
 EXPORT_SYMBOL_GPL(hyperv_flush_guest_mapping_range);
diff --git a/arch/x86/include/asm/trace/hyperv.h 
b/arch/x86/include/asm/trace/hyperv.h
index 2e6245a023ef..ace464f09681 100644
--- a/arch/x86/include/asm/trace/hyperv.h
+++ b/arch/x86/include/asm/trace/hyperv.h
@@ -42,6 +42,20 @@ TRACE_EVENT(hyperv_nested_flush_guest_mapping,
TP_printk("address space %llx ret %d", __entry->as, __entry->ret)
);
 
+TRACE_EVENT(hyperv_nested_flush_guest_mapping_range,
+   TP_PROTO(u64 as, int ret),
+   TP_ARGS(as, ret),
+
+   TP_STRUCT__entry(
+   __field(u64, as)
+   __field(int, ret)
+   ),
+   TP_fast_assign(__entry->as = as;
+  __entry->ret = ret;
+   ),
+   TP_printk("address space %llx ret %d", __entry->as, __entry->ret)
+   );
+
 TRACE_EVENT(hyperv_send_ipi_mask,
TP_PROTO(const struct cpumask *cpus,
 int vector),
-- 
2.14.4

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Re: [PATCH RESEND] staging: erofs: clean erofs_lookup()

2018-10-13 Thread Gao Xiang 
Hi,

Please ignore this patch, it has been queued by Al for 4.20 in
https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git/commit/?h=for-next&id=8300807f9e2dffb6552514763ad60e005c12eb94

Sorry for bothering...

Thanks,
Gao Xiang

On 2018/10/13 1:59, Gao Xiang via Linux-erofs wrote:
> From: Al Viro 
> 
>   d_splice_alias() does the right thing when given
> ERR_PTR(-E...) for inode.  No need for gotos, multiple
> returns, etc. in there.
> 
> Signed-off-by: Al Viro 
> Reviewed-by: Gao Xiang 
> Signed-off-by: Gao Xiang 
> ---
> Hi,
> 
> Frankly, I think it is a straight-forward cleanup by Al enough
> to be submitted to Linux 4.20 in constant to other pending fixes
> found in the process of EROFS productization these days, which
> I need more time to think over and fix formally to the community.
> 
> p.s. I have no idea whether this patch has been already queued up
> in Al's fs tree for 4.20... :'( +Cc Greg / the staging mailing
> list as well. Or please ignore this email...
> 
> Thanks,
> Gao Xiang
> 
>  drivers/staging/erofs/namei.c | 19 +++
>  1 file changed, 7 insertions(+), 12 deletions(-)
> 
> diff --git a/drivers/staging/erofs/namei.c b/drivers/staging/erofs/namei.c
> index 0039b76..5596c52 100644
> --- a/drivers/staging/erofs/namei.c
> +++ b/drivers/staging/erofs/namei.c
> @@ -223,18 +223,13 @@ static struct dentry *erofs_lookup(struct inode *dir,
>   if (err == -ENOENT) {
>   /* negative dentry */
>   inode = NULL;
> - goto negative_out;
> - } else if (unlikely(err))
> - return ERR_PTR(err);
> -
> - debugln("%s, %s (nid %llu) found, d_type %u", __func__,
> - dentry->d_name.name, nid, d_type);
> -
> - inode = erofs_iget(dir->i_sb, nid, d_type == EROFS_FT_DIR);
> - if (IS_ERR(inode))
> - return ERR_CAST(inode);
> -
> -negative_out:
> + } else if (unlikely(err)) {
> + inode = ERR_PTR(err);
> + } else {
> + debugln("%s, %s (nid %llu) found, d_type %u", __func__,
> + dentry->d_name.name, nid, d_type);
> + inode = erofs_iget(dir->i_sb, nid, d_type == EROFS_FT_DIR);
> + }
>   return d_splice_alias(inode, dentry);
>  }
>  
> 
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