* [PATCH v2] xen/arm: Blacklist the memory mapped timer (armv7-timer-mem)
@ 2015-01-14 18:00 Julien Grall
2015-01-15 15:13 ` Ian Campbell
0 siblings, 1 reply; 2+ messages in thread
From: Julien Grall @ 2015-01-14 18:00 UTC (permalink / raw)
To: xen-devel; +Cc: stefano.stabellini, Julien Grall, tim, ian.campbell
Some platform (such as the VFP Base AEMv8 model) has a memory mapped
timer. We don't want DOM0 use this timer rather than the generic ARM
timer. So blacklist it for all platforms.
Signed-off-by: Julien Grall <julien.grall@linaro.org>
---
This patch is candidate to backport for Xen 4.5 and Xen 4.4.
It may not apply correctly for Xen 4.4.
Changes in v2:
- Add a comment in the code to explain why we need to blacklist
memory mapped timer
---
xen/arch/arm/domain_build.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
index bf8dc78..d5959b5 100644
--- a/xen/arch/arm/domain_build.c
+++ b/xen/arch/arm/domain_build.c
@@ -1047,6 +1047,8 @@ static int handle_node(struct domain *d, struct kernel_info *kinfo,
DT_MATCH_COMPATIBLE("arm,psci"),
DT_MATCH_PATH("/cpus"),
DT_MATCH_TYPE("memory"),
+ /* The memory mapped timer is not supported by Xen. */
+ DT_MATCH_COMPATIBLE("arm,armv7-timer-mem"),
{ /* sentinel */ },
};
static const struct dt_device_match gic_matches[] __initconst =
--
2.1.4
^ permalink raw reply related [flat|nested] 2+ messages in thread* Re: [PATCH v2] xen/arm: Blacklist the memory mapped timer (armv7-timer-mem)
2015-01-14 18:00 [PATCH v2] xen/arm: Blacklist the memory mapped timer (armv7-timer-mem) Julien Grall
@ 2015-01-15 15:13 ` Ian Campbell
0 siblings, 0 replies; 2+ messages in thread
From: Ian Campbell @ 2015-01-15 15:13 UTC (permalink / raw)
To: Julien Grall; +Cc: xen-devel, tim, stefano.stabellini
On Wed, 2015-01-14 at 18:00 +0000, Julien Grall wrote:
> Some platform (such as the VFP Base AEMv8 model) has a memory mapped
> timer. We don't want DOM0 use this timer rather than the generic ARM
> timer. So blacklist it for all platforms.
>
> Signed-off-by: Julien Grall <julien.grall@linaro.org>
Acked + applied.
>
> ---
> This patch is candidate to backport for Xen 4.5 and Xen 4.4.
>
> It may not apply correctly for Xen 4.4.
>
> Changes in v2:
> - Add a comment in the code to explain why we need to blacklist
> memory mapped timer
> ---
> xen/arch/arm/domain_build.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/xen/arch/arm/domain_build.c b/xen/arch/arm/domain_build.c
> index bf8dc78..d5959b5 100644
> --- a/xen/arch/arm/domain_build.c
> +++ b/xen/arch/arm/domain_build.c
> @@ -1047,6 +1047,8 @@ static int handle_node(struct domain *d, struct kernel_info *kinfo,
> DT_MATCH_COMPATIBLE("arm,psci"),
> DT_MATCH_PATH("/cpus"),
> DT_MATCH_TYPE("memory"),
> + /* The memory mapped timer is not supported by Xen. */
> + DT_MATCH_COMPATIBLE("arm,armv7-timer-mem"),
> { /* sentinel */ },
> };
> static const struct dt_device_match gic_matches[] __initconst =
^ permalink raw reply [flat|nested] 2+ messages in thread
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2015-01-14 18:00 [PATCH v2] xen/arm: Blacklist the memory mapped timer (armv7-timer-mem) Julien Grall
2015-01-15 15:13 ` Ian Campbell
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