[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20181207124803.10828-2-ahmedsoliman@mena.vt.edu>
Date: Fri, 7 Dec 2018 14:47:54 +0200
From: Ahmed Abd El Mawgood <ahmedsoliman@...a.vt.edu>
To: Paolo Bonzini <pbonzini@...hat.com>,
rkrcmar@...hat.com,
Jonathan Corbet <corbet@....net>,
Thomas Gleixner <tglx@...utronix.de>,
Ingo Molnar <mingo@...hat.com>,
Borislav Petkov <bp@...en8.de>,
hpa@...or.com,
x86@...nel.org,
kvm@...r.kernel.org,
linux-doc@...r.kernel.org,
linux-kernel@...r.kernel.org,
ahmedsoliman0x666@...il.com,
ovich00@...il.com,
kernel-hardening@...ts.openwall.com,
nigel.edwards@....com,
Boris Lukashev <blukashev@...pervictus.com>,
Igor Stoppa <igor.stoppa@...il.com>
Cc: Ahmed Abd El Mawgood <ahmedsoliman@...a.vt.edu>
Subject: [PATCH 01/10] KVM: State whether memory should be freed in kvm_free_memslot
The conditions upon which kvm_free_memslot are kind of ad-hock,
it will be hard to extend memslot with allocatable data that needs to be
freed, so I replaced the current mechanism by clear flag that states if
the memory slot should be freed.
Signed-off-by: Ahmed Abd El Mawgood <ahmedsoliman@...a.vt.edu>
---
virt/kvm/kvm_main.c | 11 ++++++-----
1 file changed, 6 insertions(+), 5 deletions(-)
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 2679e476b6..039c1ef9a7 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -549,9 +549,10 @@ static void kvm_destroy_dirty_bitmap(struct kvm_memory_slot *memslot)
* Free any memory in @free but not in @dont.
*/
static void kvm_free_memslot(struct kvm *kvm, struct kvm_memory_slot *free,
- struct kvm_memory_slot *dont)
+ struct kvm_memory_slot *dont,
+ enum kvm_mr_change change)
{
- if (!dont || free->dirty_bitmap != dont->dirty_bitmap)
+ if (change == KVM_MR_DELETE)
kvm_destroy_dirty_bitmap(free);
kvm_arch_free_memslot(kvm, free, dont);
@@ -567,7 +568,7 @@ static void kvm_free_memslots(struct kvm *kvm, struct kvm_memslots *slots)
return;
kvm_for_each_memslot(memslot, slots)
- kvm_free_memslot(kvm, memslot, NULL);
+ kvm_free_memslot(kvm, memslot, NULL, KVM_MR_DELETE);
kvfree(slots);
}
@@ -1063,14 +1064,14 @@ int __kvm_set_memory_region(struct kvm *kvm,
kvm_arch_commit_memory_region(kvm, mem, &old, &new, change);
- kvm_free_memslot(kvm, &old, &new);
+ kvm_free_memslot(kvm, &old, &new, change);
kvfree(old_memslots);
return 0;
out_slots:
kvfree(slots);
out_free:
- kvm_free_memslot(kvm, &new, &old);
+ kvm_free_memslot(kvm, &new, &old, change);
out:
return r;
}
--
2.19.2
Powered by blists - more mailing lists
Confused about mailing lists and their use?
Read about mailing lists on Wikipedia
and check out these
guidelines on proper formatting of your messages.
