From: Christophe Leroy <christophe.leroy@c-s.fr>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
Nicholas Piggin <npiggin@gmail.com>,
Mike Rapoport <rppt@linux.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: [PATCH v12 01/10] powerpc/irq: use memblock functions returning virtual address
Date: Tue, 8 Jan 2019 13:43:09 +0000 (UTC) [thread overview]
Message-ID: <ec01a9be000c2305eec61bb1e2c44df2f917c1a6.1546954236.git.christophe.leroy@c-s.fr> (raw)
In-Reply-To: <cover.1546954233.git.christophe.leroy@c-s.fr>
Since only the virtual address of allocated blocks is used,
lets use functions returning directly virtual address.
Those functions have the advantage of also zeroing the block.
Suggested-by: Mike Rapoport <rppt@linux.ibm.com>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
@Mike: Part of this is taken from your serie. I was not sure how
to include you in the commit log, I used Suggested-by: but could use
any other property, so if you prefer something different just tell
me. Also, if you could review this patch, it would be nice.
arch/powerpc/kernel/irq.c | 5 -----
arch/powerpc/kernel/setup_32.c | 15 +++++----------
arch/powerpc/kernel/setup_64.c | 16 ++--------------
3 files changed, 7 insertions(+), 29 deletions(-)
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 916ddc4aac44..4a44bc395fbc 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -725,18 +725,15 @@ void exc_lvl_ctx_init(void)
#endif
#endif
- memset((void *)critirq_ctx[cpu_nr], 0, THREAD_SIZE);
tp = critirq_ctx[cpu_nr];
tp->cpu = cpu_nr;
tp->preempt_count = 0;
#ifdef CONFIG_BOOKE
- memset((void *)dbgirq_ctx[cpu_nr], 0, THREAD_SIZE);
tp = dbgirq_ctx[cpu_nr];
tp->cpu = cpu_nr;
tp->preempt_count = 0;
- memset((void *)mcheckirq_ctx[cpu_nr], 0, THREAD_SIZE);
tp = mcheckirq_ctx[cpu_nr];
tp->cpu = cpu_nr;
tp->preempt_count = HARDIRQ_OFFSET;
@@ -754,12 +751,10 @@ void irq_ctx_init(void)
int i;
for_each_possible_cpu(i) {
- memset((void *)softirq_ctx[i], 0, THREAD_SIZE);
tp = softirq_ctx[i];
tp->cpu = i;
klp_init_thread_info(tp);
- memset((void *)hardirq_ctx[i], 0, THREAD_SIZE);
tp = hardirq_ctx[i];
tp->cpu = i;
klp_init_thread_info(tp);
diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index 947f904688b0..bfe1b46a26dc 100644
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -203,10 +203,8 @@ void __init irqstack_early_init(void)
/* interrupt stacks must be in lowmem, we get that for free on ppc32
* as the memblock is limited to lowmem by default */
for_each_possible_cpu(i) {
- softirq_ctx[i] = (struct thread_info *)
- __va(memblock_phys_alloc(THREAD_SIZE, THREAD_SIZE));
- hardirq_ctx[i] = (struct thread_info *)
- __va(memblock_phys_alloc(THREAD_SIZE, THREAD_SIZE));
+ softirq_ctx[i] = memblock_alloc(THREAD_SIZE, THREAD_SIZE);
+ hardirq_ctx[i] = memblock_alloc(THREAD_SIZE, THREAD_SIZE);
}
}
@@ -224,13 +222,10 @@ void __init exc_lvl_early_init(void)
hw_cpu = 0;
#endif
- critirq_ctx[hw_cpu] = (struct thread_info *)
- __va(memblock_phys_alloc(THREAD_SIZE, THREAD_SIZE));
+ critirq_ctx[hw_cpu] = memblock_alloc(THREAD_SIZE, THREAD_SIZE);
#ifdef CONFIG_BOOKE
- dbgirq_ctx[hw_cpu] = (struct thread_info *)
- __va(memblock_phys_alloc(THREAD_SIZE, THREAD_SIZE));
- mcheckirq_ctx[hw_cpu] = (struct thread_info *)
- __va(memblock_phys_alloc(THREAD_SIZE, THREAD_SIZE));
+ dbgirq_ctx[hw_cpu] = memblock_alloc(THREAD_SIZE, THREAD_SIZE);
+ mcheckirq_ctx[hw_cpu] = memblock_alloc(THREAD_SIZE, THREAD_SIZE);
#endif
}
}
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 236c1151a3a7..943503f1e2c0 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -634,19 +634,10 @@ __init u64 ppc64_bolted_size(void)
static void *__init alloc_stack(unsigned long limit, int cpu)
{
- unsigned long pa;
-
BUILD_BUG_ON(STACK_INT_FRAME_SIZE % 16);
- pa = memblock_alloc_base_nid(THREAD_SIZE, THREAD_SIZE, limit,
- early_cpu_to_node(cpu), MEMBLOCK_NONE);
- if (!pa) {
- pa = memblock_alloc_base(THREAD_SIZE, THREAD_SIZE, limit);
- if (!pa)
- panic("cannot allocate stacks");
- }
-
- return __va(pa);
+ return memblock_alloc_try_nid(THREAD_SIZE, THREAD_SIZE, MEMBLOCK_LOW_LIMIT,
+ limit, early_cpu_to_node(cpu));
}
void __init irqstack_early_init(void)
@@ -739,20 +730,17 @@ void __init emergency_stack_init(void)
struct thread_info *ti;
ti = alloc_stack(limit, i);
- memset(ti, 0, THREAD_SIZE);
emerg_stack_init_thread_info(ti, i);
paca_ptrs[i]->emergency_sp = (void *)ti + THREAD_SIZE;
#ifdef CONFIG_PPC_BOOK3S_64
/* emergency stack for NMI exception handling. */
ti = alloc_stack(limit, i);
- memset(ti, 0, THREAD_SIZE);
emerg_stack_init_thread_info(ti, i);
paca_ptrs[i]->nmi_emergency_sp = (void *)ti + THREAD_SIZE;
/* emergency stack for machine check exception handling. */
ti = alloc_stack(limit, i);
- memset(ti, 0, THREAD_SIZE);
emerg_stack_init_thread_info(ti, i);
paca_ptrs[i]->mc_emergency_sp = (void *)ti + THREAD_SIZE;
#endif
--
2.13.3
next prev parent reply other threads:[~2019-01-08 13:45 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-01-08 13:43 [PATCH v12 00/10] powerpc: Switch to CONFIG_THREAD_INFO_IN_TASK Christophe Leroy
2019-01-08 13:43 ` Christophe Leroy [this message]
2019-01-08 14:34 ` [PATCH v12 01/10] powerpc/irq: use memblock functions returning virtual address Mike Rapoport
2019-01-08 13:43 ` [PATCH v12 02/10] book3s/64: avoid circular header inclusion in mmu-hash.h Christophe Leroy
2019-01-08 13:43 ` [PATCH v12 03/10] powerpc: Only use task_struct 'cpu' field on SMP Christophe Leroy
2019-01-08 13:43 ` [PATCH v12 04/10] powerpc: Prepare for moving thread_info into task_struct Christophe Leroy
2019-01-08 13:43 ` [PATCH v12 05/10] powerpc: Activate CONFIG_THREAD_INFO_IN_TASK Christophe Leroy
2019-01-08 13:43 ` [PATCH v12 06/10] powerpc: regain entire stack space Christophe Leroy
2019-01-08 13:43 ` [PATCH v12 07/10] powerpc: 'current_set' is now a table of task_struct pointers Christophe Leroy
2019-01-08 13:43 ` [PATCH v12 08/10] powerpc/32: Remove CURRENT_THREAD_INFO and rename TI_CPU Christophe Leroy
2019-01-08 13:43 ` [PATCH v12 09/10] powerpc/64: Remove CURRENT_THREAD_INFO Christophe Leroy
2019-01-08 13:43 ` [PATCH v12 10/10] powerpc: clean stack pointers naming Christophe Leroy
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