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Subject[PATCH RFC 07/14] arm64/mm: Introduce NUM_ASIDS
Date
At the moment ASID_FIRST_VERSION is used to know the number of ASIDs
supported. As we are going to move the ASID allocator in a separate, it
would be better to use a different name for external users.

This patch adds NUM_ASIDS and implements ASID_FIRST_VERSION using it.

Signed-off-by: Julien Grall <julien.grall@arm.com>
---
arch/arm64/mm/context.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/mm/context.c b/arch/arm64/mm/context.c
index 5a4c2b1aac71..fb13bc249951 100644
--- a/arch/arm64/mm/context.c
+++ b/arch/arm64/mm/context.c
@@ -48,7 +48,9 @@ static DEFINE_PER_CPU(atomic64_t, active_asids);
static DEFINE_PER_CPU(u64, reserved_asids);

#define ASID_MASK(info) (~GENMASK((info)->bits - 1, 0))
-#define ASID_FIRST_VERSION(info) (1UL << ((info)->bits))
+#define NUM_ASIDS(info) (1UL << ((info)->bits))
+
+#define ASID_FIRST_VERSION(info) NUM_ASIDS(info)

#ifdef CONFIG_UNMAP_KERNEL_AT_EL0
#define ASID_PER_CONTEXT 2
@@ -56,7 +58,7 @@ static DEFINE_PER_CPU(u64, reserved_asids);
#define ASID_PER_CONTEXT 1
#endif

-#define NUM_CTXT_ASIDS(info) (ASID_FIRST_VERSION(info) >> (info)->ctxt_shift)
+#define NUM_CTXT_ASIDS(info) (NUM_ASIDS(info) >> (info)->ctxt_shift)
#define asid2idx(info, asid) (((asid) & ~ASID_MASK(info)) >> (info)->ctxt_shift)
#define idx2asid(info, idx) (((idx) << (info)->ctxt_shift) & ~ASID_MASK(info))

--
2.11.0
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