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From: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
To: benh@kernel.crashing.org, paulus@samba.org, mpe@ellerman.id.au
Cc: linuxppc-dev@lists.ozlabs.org,
	"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Subject: [RFC PATCH V1 05/10] powerpc: Call jump_label_init early
Date: Tue, 14 Jun 2016 12:24:43 +0530	[thread overview]
Message-ID: <1465887288-12952-5-git-send-email-aneesh.kumar@linux.vnet.ibm.com> (raw)
In-Reply-To: <1465887288-12952-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com>

Call jump_label_init early so that can use static keys for cpu and
mmu feature check. We should have finalzed all the cpu/mmu features when
we call setup_system and we also did feature fixup for ASM based code.

Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
---
 arch/powerpc/kernel/setup_32.c | 6 ++++++
 arch/powerpc/kernel/setup_64.c | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index ecdc42d44951..8831738c3dcb 100644
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -99,6 +99,12 @@ notrace unsigned long __init early_init(unsigned long dt_ptr)
 			 PTRRELOC(&__stop___lwsync_fixup));
 
 	do_final_fixups();
+	/*
+	 * init jump label so that cpu and mmu feature check can be optimized
+	 * using jump label. We should have all the cpu/mmu features finalized
+	 * by now.
+	 */
+	jump_label_init();
 
 	return KERNELBASE + offset;
 }
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 86aea0537270..a4867a900b02 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -480,6 +480,12 @@ void __init setup_system(void)
 	do_lwsync_fixups(cur_cpu_spec->cpu_features,
 			 &__start___lwsync_fixup, &__stop___lwsync_fixup);
 	do_final_fixups();
+	/*
+	 * init jump label so that cpu and mmu feature check can be optimized
+	 * using jump label. We should have all the cpu/mmu features finalized
+	 * by now.
+	 */
+	jump_label_init();
 
 	/*
 	 * Unflatten the device-tree passed by prom_init or kexec
-- 
2.7.4

  parent reply	other threads:[~2016-06-14  6:55 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-06-14  6:54 [RFC PATCH V1 01/10] powerpc/mm: Add __cpu/__mmu_has_feature Aneesh Kumar K.V
2016-06-14  6:54 ` [RFC PATCH V1 02/10] powerpc/mm: Convert early cpu/mmu feature check to use the new helpers Aneesh Kumar K.V
2016-06-14  6:54 ` [RFC PATCH V1 03/10] powerpc/mm/radix: Add radix_set_pte to use in early init Aneesh Kumar K.V
2016-06-14  6:54 ` [RFC PATCH V1 04/10] jump_label: make it possible for the archs to invoke jump_label_init() much earlier Aneesh Kumar K.V
2016-06-14  6:54 ` Aneesh Kumar K.V [this message]
2016-06-14  6:54 ` [RFC PATCH V1 06/10] powerpc: kill mfvtb() Aneesh Kumar K.V
2016-06-14  6:54 ` [RFC PATCH V1 07/10] powerpc: move the cpu_has_feature to a separate file Aneesh Kumar K.V
2016-06-14  6:54 ` [RFC PATCH V1 08/10] powerpc: use the jump label for cpu_has_feature Aneesh Kumar K.V
2016-06-14  6:54 ` [RFC PATCH V1 09/10] powerpc: use jump label for mmu_has_feature Aneesh Kumar K.V
2016-06-14  6:54 ` [RFC PATCH V1 10/10] powerpc/mm: Catch the usage of cpu/mmu_has_feature before jump label init Aneesh Kumar K.V

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