From: Bharat Bhushan <r65777@freescale.com>
To: <kvm-ppc@vger.kernel.org>, <kvm@vger.kernel.org>, <agraf@suse.de>,
<scottwood@freescale.com>, <tiejun.chen@windriver.com>,
<benh@kernel.crashing.org>, <linuxppc-dev@lists.ozlabs.org>,
<linux-kernel@vger.kernel.org>, <mikey@neuling.org>
Cc: Bharat Bhushan <bharat.bhushan@freescale.com>
Subject: [PATCH 3/6 v5] powerpc: export debug registers save function for KVM
Date: Wed, 26 Jun 2013 11:12:23 +0530 [thread overview]
Message-ID: <1372225346-5029-4-git-send-email-Bharat.Bhushan@freescale.com> (raw)
In-Reply-To: <1372225346-5029-1-git-send-email-Bharat.Bhushan@freescale.com>
KVM need this function when switching from vcpu to user-space
thread. My subsequent patch will use this function.
Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com>
---
arch/powerpc/include/asm/switch_to.h | 4 ++++
arch/powerpc/kernel/process.c | 3 ++-
2 files changed, 6 insertions(+), 1 deletions(-)
diff --git a/arch/powerpc/include/asm/switch_to.h b/arch/powerpc/include/asm/switch_to.h
index 200d763..50b357f 100644
--- a/arch/powerpc/include/asm/switch_to.h
+++ b/arch/powerpc/include/asm/switch_to.h
@@ -30,6 +30,10 @@ extern void enable_kernel_spe(void);
extern void giveup_spe(struct task_struct *);
extern void load_up_spe(struct task_struct *);
+#ifdef CONFIG_PPC_ADV_DEBUG_REGS
+extern void switch_booke_debug_regs(struct thread_struct *new_thread);
+#endif
+
#ifndef CONFIG_SMP
extern void discard_lazy_cpu_state(void);
#else
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 01ff496..da586aa 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -362,12 +362,13 @@ static void prime_debug_regs(struct thread_struct *thread)
* debug registers, set the debug registers from the values
* stored in the new thread.
*/
-static void switch_booke_debug_regs(struct thread_struct *new_thread)
+void switch_booke_debug_regs(struct thread_struct *new_thread)
{
if ((current->thread.debug.dbcr0 & DBCR0_IDM)
|| (new_thread->debug.dbcr0 & DBCR0_IDM))
prime_debug_regs(new_thread);
}
+EXPORT_SYMBOL_GPL(switch_booke_debug_regs);
#else /* !CONFIG_PPC_ADV_DEBUG_REGS */
#ifndef CONFIG_HAVE_HW_BREAKPOINT
static void set_debug_reg_defaults(struct thread_struct *thread)
--
1.7.0.4
next prev parent reply other threads:[~2013-06-26 5:34 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-06-26 5:42 [PATCH 0/6 v5] KVM :PPC: Userspace Debug support Bharat Bhushan
2013-06-26 5:42 ` [PATCH 1/6 v5] powerpc: remove unnecessary line continuations Bharat Bhushan
2013-06-26 5:42 ` [PATCH 2/6 v5] powerpc: move debug registers in a structure Bharat Bhushan
2013-06-26 5:42 ` Bharat Bhushan [this message]
2013-06-27 4:47 ` [PATCH 3/6 v5] powerpc: export debug registers save function for KVM Stephen Rothwell
2013-06-26 5:42 ` [PATCH 4/6 v5] KVM: PPC: exit to user space on "ehpriv" instruction Bharat Bhushan
2013-06-26 6:54 ` tiejun.chen
2013-06-26 8:44 ` Bhushan Bharat-R65777
2013-06-26 9:17 ` tiejun.chen
2013-06-26 9:27 ` Bhushan Bharat-R65777
2013-06-26 10:33 ` Alexander Graf
2013-06-26 5:42 ` [PATCH 5/6 v5] KVM: PPC: Using "struct debug_reg" Bharat Bhushan
2013-06-26 5:42 ` [PATCH 6/6 v5] KVM: PPC: Add userspace debug stub support Bharat Bhushan
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