From: Julien Grall <julien.grall@arm.com>
To: linux-kernel@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
kvmarm@lists.cs.columbia.edu
Cc: marc.zyngier@arm.com, catalin.marinas@arm.com,
will.deacon@arm.com, Julien Grall <julien.grall@arm.com>
Subject: [PATCH v3 05/15] arm64/mm: Remove dependency on MM in new_context
Date: Wed, 24 Jul 2019 17:25:24 +0100 [thread overview]
Message-ID: <20190724162534.7390-6-julien.grall@arm.com> (raw)
In-Reply-To: <20190724162534.7390-1-julien.grall@arm.com>
The function new_context will be part of a generic ASID allocator. At
the moment, the MM structure is only used to fetch the ASID.
To remove the dependency on MM, it is possible to just pass a pointer to
the current ASID.
Signed-off-by: Julien Grall <julien.grall@arm.com>
---
arch/arm64/mm/context.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/arch/arm64/mm/context.c b/arch/arm64/mm/context.c
index b50f52a09baf..dfb0da35a541 100644
--- a/arch/arm64/mm/context.c
+++ b/arch/arm64/mm/context.c
@@ -140,10 +140,10 @@ static bool check_update_reserved_asid(struct asid_info *info, u64 asid,
return hit;
}
-static u64 new_context(struct asid_info *info, struct mm_struct *mm)
+static u64 new_context(struct asid_info *info, atomic64_t *pasid)
{
static u32 cur_idx = 1;
- u64 asid = atomic64_read(&mm->context.id);
+ u64 asid = atomic64_read(pasid);
u64 generation = atomic64_read(&info->generation);
if (asid != 0) {
@@ -225,7 +225,7 @@ void check_and_switch_context(struct mm_struct *mm, unsigned int cpu)
/* Check that our ASID belongs to the current generation. */
asid = atomic64_read(&mm->context.id);
if ((asid ^ atomic64_read(&info->generation)) >> info->bits) {
- asid = new_context(info, mm);
+ asid = new_context(info, &mm->context.id);
atomic64_set(&mm->context.id, asid);
}
--
2.11.0
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next prev parent reply other threads:[~2019-07-24 16:26 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-24 16:25 [PATCH v3 00/15] kvm/arm: Align the VMID allocation with the arm64 ASID one Julien Grall
2019-07-24 16:25 ` [PATCH v3 01/15] arm64/mm: Introduce asid_info structure and move asid_generation/asid_map to it Julien Grall
2019-07-24 16:25 ` [PATCH v3 02/15] arm64/mm: Move active_asids and reserved_asids to asid_info Julien Grall
2019-07-24 16:25 ` [PATCH v3 03/15] arm64/mm: Move bits " Julien Grall
2019-07-24 16:25 ` [PATCH v3 04/15] arm64/mm: Move the variable lock and tlb_flush_pending " Julien Grall
2019-07-24 16:25 ` Julien Grall [this message]
2019-07-24 16:25 ` [PATCH v3 06/15] arm64/mm: Store the number of asid allocated per context Julien Grall
2019-07-24 16:25 ` [PATCH v3 07/15] arm64/mm: Introduce NUM_ASIDS Julien Grall
2019-07-24 16:25 ` [PATCH v3 08/15] arm64/mm: Split asid_inits in 2 parts Julien Grall
2019-07-24 16:25 ` [PATCH v3 09/15] arm64/mm: Split the function check_and_switch_context in 3 parts Julien Grall
2019-07-25 16:28 ` Catalin Marinas
2019-07-24 16:25 ` [PATCH v3 10/15] arm64/mm: Introduce a callback to flush the local context Julien Grall
2019-07-24 16:25 ` [PATCH v3 11/15] arm64: Move the ASID allocator code in a separate file Julien Grall
2019-07-24 16:25 ` [PATCH v3 12/15] arm64/lib: Add an helper to free memory allocated by the ASID allocator Julien Grall
2019-07-24 16:25 ` [PATCH v3 13/15] arm/kvm: Introduce a new VMID allocator Julien Grall
2019-07-24 16:25 ` [PATCH v3 14/15] arch/arm64: Introduce a capability to tell whether 16-bit VMID is available Julien Grall
2019-07-24 16:25 ` [PATCH v3 15/15] kvm/arm: Align the VMID allocation with the arm64 ASID one Julien Grall
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