From: mark.rutland@arm.com (Mark Rutland)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 1/5] ARM: hyp: initialize CNTVOFF to zero
Date: Wed, 27 Mar 2013 17:11:48 +0000 [thread overview]
Message-ID: <1364404312-4427-2-git-send-email-mark.rutland@arm.com> (raw)
In-Reply-To: <1364404312-4427-1-git-send-email-mark.rutland@arm.com>
From: Marc Zyngier <Marc.Zyngier@arm.com>
In order to be able to use the virtual counter in a safe way,
make sure it is initialized to zero before dropping to SVC.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Dave Martin <dave.martin@linaro.org>
---
arch/arm/kernel/hyp-stub.S | 2 ++
1 file changed, 2 insertions(+)
diff --git a/arch/arm/kernel/hyp-stub.S b/arch/arm/kernel/hyp-stub.S
index 1315c4c..dbe2110 100644
--- a/arch/arm/kernel/hyp-stub.S
+++ b/arch/arm/kernel/hyp-stub.S
@@ -153,6 +153,8 @@ THUMB( orr r7, #(1 << 30) ) @ HSCTLR.TE
mrc p15, 4, r7, c14, c1, 0 @ CNTHCTL
orr r7, r7, #3 @ PL1PCEN | PL1PCTEN
mcr p15, 4, r7, c14, c1, 0 @ CNTHCTL
+ mov r7, #0
+ mcrr p15, 4, r7, r7, c14 @ CNTVOFF
1:
#endif
--
1.8.1.1
next prev parent reply other threads:[~2013-03-27 17:11 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-27 17:11 [PATCH 0/5] arm: arch_timer cleanups and niceties for 3.10 Mark Rutland
2013-03-27 17:11 ` Mark Rutland [this message]
2013-03-27 17:11 ` [PATCH 2/5] ARM: KVM: arch_timers: zero CNTVOFF upon return to host Mark Rutland
2013-04-03 23:39 ` Christoffer Dall
2013-04-04 9:29 ` Mark Rutland
2013-04-04 15:27 ` Christoffer Dall
2013-04-04 15:38 ` Mark Rutland
2013-03-27 17:11 ` [PATCH 3/5] clocksource: arch_timer: use virtual counters Mark Rutland
2013-03-27 17:11 ` [PATCH 4/5] arm: fix up ARM_ARCH_TIMER selects Mark Rutland
2013-03-27 19:47 ` Stephen Warren
2013-04-02 13:28 ` Mark Rutland
2013-03-27 17:11 ` [PATCH 5/5] ARM: arch_timer: stop virtual timer when booted in HYP mode Mark Rutland
2013-03-27 17:51 ` [PATCH 0/5] arm: arch_timer cleanups and niceties for 3.10 Santosh Shilimkar
2013-04-02 13:29 ` Mark Rutland
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