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: christoffer.dall@arm.com, james.morse@arm.com, marc.zyngier@arm.com, julien.thierry@arm.com, suzuki.poulose@arm.com, catalin.marinas@arm.com, will.deacon@arm.com, Julien Grall <julien.grall@arm.com> Subject: [PATCH RFC 05/14] arm64/mm: Remove dependency on MM in new_context Date: Thu, 21 Mar 2019 16:36:14 +0000 Message-ID: <20190321163623.20219-6-julien.grall@arm.com> (raw) In-Reply-To: <20190321163623.20219-1-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 e98ab348b9cb..488845c39c39 100644 --- a/arch/arm64/mm/context.c +++ b/arch/arm64/mm/context.c @@ -151,10 +151,10 @@ 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) { @@ -236,7 +236,7 @@ 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
next prev parent reply index Thread overview: 56+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-03-21 16:36 [PATCH RFC 00/14] kvm/arm: Align the VMID allocation with the arm64 ASID one Julien Grall 2019-03-21 16:36 ` [PATCH RFC 01/14] arm64/mm: Introduce asid_info structure and move asid_generation/asid_map to it Julien Grall 2019-03-21 17:03 ` Suzuki K Poulose 2019-03-21 17:27 ` Julien Grall 2019-03-21 16:36 ` [PATCH RFC 02/14] arm64/mm: Move active_asids and reserved_asids to asid_info Julien Grall 2019-03-21 16:36 ` [PATCH RFC 03/14] arm64/mm: Move bits " Julien Grall 2019-03-21 16:36 ` [PATCH RFC 04/14] arm64/mm: Move the variable lock and tlb_flush_pending " Julien Grall 2019-03-21 16:36 ` Julien Grall [this message] 2019-03-21 16:36 ` [PATCH RFC 06/14] arm64/mm: Store the number of asid allocated per context Julien Grall 2019-03-21 16:36 ` [PATCH RFC 07/14] arm64/mm: Introduce NUM_ASIDS Julien Grall 2019-03-21 16:36 ` [PATCH RFC 08/14] arm64/mm: Split asid_inits in 2 parts Julien Grall 2019-03-21 16:36 ` [PATCH RFC 09/14] arm64/mm: Split the function check_and_switch_context in 3 parts Julien Grall 2019-03-21 16:36 ` [PATCH RFC 10/14] arm64/mm: Introduce a callback to flush the local context Julien Grall 2019-03-21 16:36 ` [PATCH RFC 11/14] arm64: Move the ASID allocator code in a separate file Julien Grall 2019-06-05 16:56 ` Julien Grall 2019-06-05 20:41 ` Palmer Dabbelt 2019-06-11 1:56 ` Gary Guo 2019-06-19 8:07 ` Guo Ren 2019-06-19 8:54 ` Julien Grall 2019-06-19 9:12 ` Will Deacon 2019-06-19 12:18 ` Guo Ren 2019-06-19 12:39 ` Will Deacon 2019-06-20 9:33 ` Guo Ren 2019-06-24 10:40 ` Will Deacon 2019-06-25 7:25 ` Palmer Dabbelt 2019-09-07 23:52 ` Guo Ren 2019-09-12 14:02 ` Will Deacon 2019-09-12 14:59 ` Guo Ren 2019-09-13 7:13 ` Guo Ren 2019-09-14 8:49 ` Guo Ren 2019-09-16 12:57 ` Jean-Philippe Brucker 2019-09-19 13:07 ` Guo Ren 2019-09-19 15:18 ` Jean-Philippe Brucker 2019-09-20 0:07 ` Guo Ren 2019-09-20 7:18 ` Jean-Philippe Brucker 2019-09-14 14:01 ` Palmer Dabbelt 2019-09-15 5:03 ` Anup Patel 2019-09-16 18:18 ` Will Deacon 2019-09-16 18:28 ` Palmer Dabbelt 2019-09-17 3:42 ` Anup Patel 2019-09-19 13:36 ` Guo Ren 2019-06-19 11:51 ` Guo Ren 2019-06-19 12:52 ` Julien Grall 2019-06-21 14:16 ` Catalin Marinas 2019-06-23 16:35 ` Guo Ren 2019-06-24 10:22 ` Will Deacon 2019-06-27 9:41 ` qi.fuli 2019-06-27 10:26 ` Will Deacon 2019-06-24 15:38 ` Catalin Marinas 2019-06-30 4:29 ` Guo Ren 2019-07-01 9:17 ` Catalin Marinas 2019-07-16 3:31 ` Guo Ren 2019-07-22 16:38 ` Catalin Marinas 2019-03-21 16:36 ` [PATCH RFC 12/14] arm64/lib: asid: Allow user to update the context under the lock Julien Grall 2019-03-21 16:36 ` [PATCH RFC 13/14] arm/kvm: Introduce a new VMID allocator Julien Grall 2019-03-21 16:36 ` [PATCH RFC 14/14] kvm/arm: Align the VMID allocation with the arm64 ASID one Julien Grall
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