From: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
To: <linux-arm-kernel@lists.infradead.org>,
<kvmarm@lists.cs.columbia.edu>, <linux-kernel@vger.kernel.org>
Cc: <maz@kernel.org>, <will@kernel.org>, <catalin.marinas@arm.com>,
<james.morse@arm.com>, <julien.thierry.kdev@gmail.com>,
<suzuki.poulose@arm.com>, <jean-philippe@linaro.org>,
<julien@xen.org>, <linuxarm@huawei.com>
Subject: [PATCH v4 11/16] arm64/mm: Introduce a callback to flush the local context
Date: Wed, 14 Apr 2021 12:23:07 +0100 [thread overview]
Message-ID: <20210414112312.13704-12-shameerali.kolothum.thodi@huawei.com> (raw)
In-Reply-To: <20210414112312.13704-1-shameerali.kolothum.thodi@huawei.com>
From: Julien Grall <julien.grall@arm.com>
Flushing the local context will vary depending on the actual user
of the ASID allocator. Introduce a new callback to flush the local
context and move the call to flush local TLB in it.
Signed-off-by: Julien Grall <julien.grall@arm.com>
Signed-off-by: Shameer Kolothum <shameerali.kolothum.thodi@huawei.com>
---
arch/arm64/mm/context.c | 13 +++++++++++--
1 file changed, 11 insertions(+), 2 deletions(-)
diff --git a/arch/arm64/mm/context.c b/arch/arm64/mm/context.c
index 901472a57b5d..ee446f7535a3 100644
--- a/arch/arm64/mm/context.c
+++ b/arch/arm64/mm/context.c
@@ -32,6 +32,8 @@ static struct asid_info
unsigned long *pinned_map;
unsigned long max_pinned_asids;
unsigned long nr_pinned_asids;
+ /* Callback to locally flush the context. */
+ void (*flush_cpu_ctxt_cb)(void);
} asid_info;
#define active_asid(info, cpu) (*per_cpu_ptr((info)->active, cpu))
@@ -245,8 +247,9 @@ static void asid_new_context(struct asid_info *info, atomic64_t *pasid,
atomic64_set(pasid, asid);
}
- if (cpumask_test_and_clear_cpu(cpu, &info->flush_pending))
- local_flush_tlb_all();
+ if (cpumask_test_and_clear_cpu(cpu, &info->flush_pending) &&
+ info->flush_cpu_ctxt_cb)
+ info->flush_cpu_ctxt_cb();
atomic64_set(&active_asid(info, cpu), asid);
raw_spin_unlock_irqrestore(&info->lock, flags);
@@ -427,6 +430,11 @@ void cpu_do_switch_mm(phys_addr_t pgd_phys, struct mm_struct *mm)
post_ttbr_update_workaround();
}
+static void asid_flush_cpu_ctxt(void)
+{
+ local_flush_tlb_all();
+}
+
static int asids_update_limit(void)
{
struct asid_info *info = &asid_info;
@@ -499,6 +507,7 @@ static int asids_init(void)
info->active = &active_asids;
info->reserved = &reserved_asids;
+ info->flush_cpu_ctxt_cb = asid_flush_cpu_ctxt;
/*
* We cannot call set_reserved_asid_bits() here because CPU
--
2.17.1
next prev parent reply other threads:[~2021-04-14 11:26 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-14 11:22 [PATCH v4 00/16] kvm/arm: Align the VMID allocation with the arm64 ASID one Shameer Kolothum
2021-04-14 11:22 ` [PATCH v4 01/16] arm64/mm: Introduce asid_info structure and move asid_generation/asid_map to it Shameer Kolothum
2021-04-14 11:22 ` [PATCH v4 02/16] arm64/mm: Move active_asids and reserved_asids to asid_info Shameer Kolothum
2021-04-14 11:22 ` [PATCH v4 03/16] arm64/mm: Move bits " Shameer Kolothum
2021-04-14 11:23 ` [PATCH v4 04/16] arm64/mm: Move the variable lock and tlb_flush_pending " Shameer Kolothum
2021-04-14 11:23 ` [PATCH v4 05/16] arm64/mm: Remove dependency on MM in new_context Shameer Kolothum
2021-04-14 11:23 ` [PATCH v4 06/16] arm64/mm: Introduce NUM_CTXT_ASIDS Shameer Kolothum
2021-04-14 11:23 ` [PATCH v4 07/16] arm64/mm: Move Pinned ASID related variables to asid_info Shameer Kolothum
2021-04-14 11:23 ` [PATCH v4 08/16] arm64/mm: Split asid_inits in 2 parts Shameer Kolothum
2021-04-14 11:23 ` [PATCH v4 09/16] arm64/mm: Split the function check_and_switch_context in 3 parts Shameer Kolothum
2021-04-14 11:23 ` [PATCH v4 10/16] arm64/mm: Split the arm64_mm_context_get/put Shameer Kolothum
2021-04-14 11:23 ` Shameer Kolothum [this message]
2021-04-14 11:23 ` [PATCH v4 12/16] arm64/mm: Introduce a callback to set reserved bits Shameer Kolothum
2021-04-14 11:23 ` [PATCH v4 13/16] arm64: Move the ASID allocator code in a separate file Shameer Kolothum
2021-04-14 11:23 ` [PATCH v4 14/16] arm64/lib: Add an helper to free memory allocated by the ASID allocator Shameer Kolothum
2021-04-14 11:23 ` [PATCH v4 15/16] arch/arm64: Introduce a capability to tell whether 16-bit VMID is available Shameer Kolothum
2021-04-14 11:23 ` [PATCH v4 16/16] kvm/arm: Align the VMID allocation with the arm64 ASID one Shameer Kolothum
2021-04-22 16:08 ` [PATCH v4 00/16] " Will Deacon
2021-04-23 8:31 ` Shameerali Kolothum Thodi
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