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[v4,14/16] arm64/lib: Add an helper to free memory allocated by the ASID allocator

Message ID 20210414112312.13704-15-shameerali.kolothum.thodi@huawei.com (mailing list archive)
State New, archived
Headers show
Series kvm/arm: Align the VMID allocation with the arm64 ASID one | expand

Commit Message

Shameerali Kolothum Thodi April 14, 2021, 11:23 a.m. UTC 
From: Julien Grall <julien.grall@arm.com>

Some users of the ASID allocator (e.g VMID) may need to free any
resources if the initialization fail. So introduce a function that
allows freeing of any memory allocated by the ASID allocator.

Signed-off-by: Julien Grall <julien.grall@arm.com>
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
---
 arch/arm64/include/asm/lib_asid.h | 2 ++
 arch/arm64/lib/asid.c             | 6 ++++++
 2 files changed, 8 insertions(+)
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Patch

diff --git a/arch/arm64/include/asm/lib_asid.h b/arch/arm64/include/asm/lib_asid.h
index acae8d243d17..4dbc0a3f19a6 100644
--- a/arch/arm64/include/asm/lib_asid.h
+++ b/arch/arm64/include/asm/lib_asid.h
@@ -82,4 +82,6 @@  void asid_context_pinned_put(struct asid_info *info, atomic64_t *pasid,
 			     refcount_t *pinned);
 int asid_allocator_init(struct asid_info *info, u32 bits, bool pinned);
 
+void asid_allocator_free(struct asid_info *info);
+
 #endif
diff --git a/arch/arm64/lib/asid.c b/arch/arm64/lib/asid.c
index 286285616f65..7bd031f9516a 100644
--- a/arch/arm64/lib/asid.c
+++ b/arch/arm64/lib/asid.c
@@ -256,3 +256,9 @@  int asid_allocator_init(struct asid_info *info, u32 bits, bool pinned)
 
 	return 0;
 }
+
+void asid_allocator_free(struct asid_info *info)
+{
+	kfree(info->map);
+	kfree(info->pinned_map);
+}