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Date: Mon, 20 Sep 2021 23:38:51 +0200
From: "Maciej S. Szmigiero" <mail@...iej.szmigiero.name>
To: Paolo Bonzini <pbonzini@...hat.com>,
Vitaly Kuznetsov <vkuznets@...hat.com>
Cc: Sean Christopherson <seanjc@...gle.com>,
Wanpeng Li <wanpengli@...cent.com>,
Jim Mattson <jmattson@...gle.com>,
Igor Mammedov <imammedo@...hat.com>,
Marc Zyngier <maz@...nel.org>,
James Morse <james.morse@....com>,
Julien Thierry <julien.thierry.kdev@...il.com>,
Suzuki K Poulose <suzuki.poulose@....com>,
Huacai Chen <chenhuacai@...nel.org>,
Aleksandar Markovic <aleksandar.qemu.devel@...il.com>,
Paul Mackerras <paulus@...abs.org>,
Christian Borntraeger <borntraeger@...ibm.com>,
Janosch Frank <frankja@...ux.ibm.com>,
David Hildenbrand <david@...hat.com>,
Cornelia Huck <cohuck@...hat.com>,
Claudio Imbrenda <imbrenda@...ux.ibm.com>,
Joerg Roedel <joro@...tes.org>, kvm@...r.kernel.org,
linux-kernel@...r.kernel.org
Subject: [PATCH v5 03/13] KVM: Add "old" memslot parameter to kvm_arch_prepare_memory_region()
From: "Maciej S. Szmigiero" <maciej.szmigiero@...cle.com>
This is needed for the next commit, which moves n_memslots_pages
recalculation from kvm_arch_commit_memory_region() to the aforementioned
function to allow for returning an error code.
While we are at it let's also rename the "memslot" parameter to "new" for
consistency with kvm_arch_commit_memory_region(), which uses the same
argument set now.
No functional change intended.
Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@...cle.com>
---
arch/arm64/kvm/mmu.c | 7 ++++---
arch/mips/kvm/mips.c | 3 ++-
arch/powerpc/kvm/powerpc.c | 5 +++--
arch/s390/kvm/kvm-s390.c | 3 ++-
arch/x86/kvm/x86.c | 5 +++--
include/linux/kvm_host.h | 3 ++-
virt/kvm/kvm_main.c | 2 +-
7 files changed, 17 insertions(+), 11 deletions(-)
diff --git a/arch/arm64/kvm/mmu.c b/arch/arm64/kvm/mmu.c
index 1a94a7ca48f2..6d93ae1edb6d 100644
--- a/arch/arm64/kvm/mmu.c
+++ b/arch/arm64/kvm/mmu.c
@@ -1486,7 +1486,8 @@ void kvm_arch_commit_memory_region(struct kvm *kvm,
}
int kvm_arch_prepare_memory_region(struct kvm *kvm,
- struct kvm_memory_slot *memslot,
+ const struct kvm_memory_slot *old,
+ struct kvm_memory_slot *new,
const struct kvm_userspace_memory_region *mem,
enum kvm_mr_change change)
{
@@ -1502,7 +1503,7 @@ int kvm_arch_prepare_memory_region(struct kvm *kvm,
* Prevent userspace from creating a memory region outside of the IPA
* space addressable by the KVM guest IPA space.
*/
- if ((memslot->base_gfn + memslot->npages) > (kvm_phys_size(kvm) >> PAGE_SHIFT))
+ if ((new->base_gfn + new->npages) > (kvm_phys_size(kvm) >> PAGE_SHIFT))
return -EFAULT;
mmap_read_lock(current->mm);
@@ -1534,7 +1535,7 @@ int kvm_arch_prepare_memory_region(struct kvm *kvm,
if (vma->vm_flags & VM_PFNMAP) {
/* IO region dirty page logging not allowed */
- if (memslot->flags & KVM_MEM_LOG_DIRTY_PAGES) {
+ if (new->flags & KVM_MEM_LOG_DIRTY_PAGES) {
ret = -EINVAL;
break;
}
diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c
index 75c6f264c626..8587c260c6fb 100644
--- a/arch/mips/kvm/mips.c
+++ b/arch/mips/kvm/mips.c
@@ -233,7 +233,8 @@ void kvm_arch_flush_shadow_memslot(struct kvm *kvm,
}
int kvm_arch_prepare_memory_region(struct kvm *kvm,
- struct kvm_memory_slot *memslot,
+ const struct kvm_memory_slot *old,
+ struct kvm_memory_slot *new,
const struct kvm_userspace_memory_region *mem,
enum kvm_mr_change change)
{
diff --git a/arch/powerpc/kvm/powerpc.c b/arch/powerpc/kvm/powerpc.c
index b4e6f70b97b9..6ecb6a51d82f 100644
--- a/arch/powerpc/kvm/powerpc.c
+++ b/arch/powerpc/kvm/powerpc.c
@@ -706,11 +706,12 @@ void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot)
}
int kvm_arch_prepare_memory_region(struct kvm *kvm,
- struct kvm_memory_slot *memslot,
+ const struct kvm_memory_slot *old,
+ struct kvm_memory_slot *new,
const struct kvm_userspace_memory_region *mem,
enum kvm_mr_change change)
{
- return kvmppc_core_prepare_memory_region(kvm, memslot, mem, change);
+ return kvmppc_core_prepare_memory_region(kvm, new, mem, change);
}
void kvm_arch_commit_memory_region(struct kvm *kvm,
diff --git a/arch/s390/kvm/kvm-s390.c b/arch/s390/kvm/kvm-s390.c
index 752a0ffab9bf..3fd0f4afe742 100644
--- a/arch/s390/kvm/kvm-s390.c
+++ b/arch/s390/kvm/kvm-s390.c
@@ -5016,7 +5016,8 @@ vm_fault_t kvm_arch_vcpu_fault(struct kvm_vcpu *vcpu, struct vm_fault *vmf)
/* Section: memory related */
int kvm_arch_prepare_memory_region(struct kvm *kvm,
- struct kvm_memory_slot *memslot,
+ const struct kvm_memory_slot *old,
+ struct kvm_memory_slot *new,
const struct kvm_userspace_memory_region *mem,
enum kvm_mr_change change)
{
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 2e4fe2511c5d..97d86223427d 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -11506,12 +11506,13 @@ void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen)
}
int kvm_arch_prepare_memory_region(struct kvm *kvm,
- struct kvm_memory_slot *memslot,
+ const struct kvm_memory_slot *old,
+ struct kvm_memory_slot *new,
const struct kvm_userspace_memory_region *mem,
enum kvm_mr_change change)
{
if (change == KVM_MR_CREATE || change == KVM_MR_MOVE)
- return kvm_alloc_memslot_metadata(kvm, memslot,
+ return kvm_alloc_memslot_metadata(kvm, new,
mem->memory_size >> PAGE_SHIFT);
return 0;
}
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 041ca7f15ea4..c6963f6f1eb8 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -832,7 +832,8 @@ int __kvm_set_memory_region(struct kvm *kvm,
void kvm_arch_free_memslot(struct kvm *kvm, struct kvm_memory_slot *slot);
void kvm_arch_memslots_updated(struct kvm *kvm, u64 gen);
int kvm_arch_prepare_memory_region(struct kvm *kvm,
- struct kvm_memory_slot *memslot,
+ const struct kvm_memory_slot *old,
+ struct kvm_memory_slot *new,
const struct kvm_userspace_memory_region *mem,
enum kvm_mr_change change);
void kvm_arch_commit_memory_region(struct kvm *kvm,
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 439d3b4cd1a9..c3c71a9e85c9 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1571,7 +1571,7 @@ static int kvm_set_memslot(struct kvm *kvm,
kvm_copy_memslots(slots, __kvm_memslots(kvm, as_id));
}
- r = kvm_arch_prepare_memory_region(kvm, new, mem, change);
+ r = kvm_arch_prepare_memory_region(kvm, old, new, mem, change);
if (r)
goto out_slots;
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