lkml.org 
[lkml]   [2020]   [May]   [7]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH RFCv2 6/9] kvm/arm64: Export kvm_handle_user_mem_abort() with prefault mode
Date
This renames user_mem_abort() to kvm_handle_user_mem_abort(), and
then export it. The function will be used in asynchronous page fault
to populate a page table entry once the corresponding page is populated
from the backup device (e.g. swap partition):

* Parameter @fault_status is replace by @esr.
* The parameters are reorder based on their importance.

This shouldn't cause any functional changes.

Signed-off-by: Gavin Shan <gshan@redhat.com>
---
arch/arm64/include/asm/kvm_host.h | 4 ++++
virt/kvm/arm/mmu.c | 14 ++++++++------
2 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 32c8a675e5a4..f77c706777ec 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -437,6 +437,10 @@ int __kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu,
struct kvm_vcpu_events *events);

#define KVM_ARCH_WANT_MMU_NOTIFIER
+int kvm_handle_user_mem_abort(struct kvm_vcpu *vcpu, unsigned int esr,
+ struct kvm_memory_slot *memslot,
+ phys_addr_t fault_ipa, unsigned long hva,
+ bool prefault);
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);
diff --git a/virt/kvm/arm/mmu.c b/virt/kvm/arm/mmu.c
index e462e0368fd9..95aaabb2b1fc 100644
--- a/virt/kvm/arm/mmu.c
+++ b/virt/kvm/arm/mmu.c
@@ -1656,12 +1656,12 @@ static bool fault_supports_stage2_huge_mapping(struct kvm_memory_slot *memslot,
(hva & ~(map_size - 1)) + map_size <= uaddr_end;
}

-static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
- struct kvm_memory_slot *memslot, unsigned long hva,
- unsigned long fault_status)
+int kvm_handle_user_mem_abort(struct kvm_vcpu *vcpu, unsigned int esr,
+ struct kvm_memory_slot *memslot,
+ phys_addr_t fault_ipa, unsigned long hva,
+ bool prefault)
{
- int ret;
- u32 esr = kvm_vcpu_get_esr(vcpu);
+ unsigned int fault_status = kvm_vcpu_trap_get_fault_type(esr);
bool write_fault, writable, force_pte = false;
bool exec_fault, needs_exec;
unsigned long mmu_seq;
@@ -1674,6 +1674,7 @@ static int user_mem_abort(struct kvm_vcpu *vcpu, phys_addr_t fault_ipa,
pgprot_t mem_type = PAGE_S2;
bool logging_active = memslot_is_logging(memslot);
unsigned long vma_pagesize, flags = 0;
+ int ret;

write_fault = kvm_is_write_fault(esr);
exec_fault = kvm_vcpu_trap_is_iabt(esr);
@@ -1995,7 +1996,8 @@ int kvm_handle_guest_abort(struct kvm_vcpu *vcpu, struct kvm_run *run)
goto out_unlock;
}

- ret = user_mem_abort(vcpu, fault_ipa, memslot, hva, fault_status);
+ ret = kvm_handle_user_mem_abort(vcpu, esr, memslot,
+ fault_ipa, hva, false);
if (ret == 0)
ret = 1;
out:
--
2.23.0
\
 
 \ /
  Last update: 2020-05-08 05:31    [W:0.098 / U:6.664 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site