diff options
| author | Chris Johnson <cwj@nvidia.com> | 2012-02-14 17:27:08 -0800 |
|---|---|---|
| committer | Simone Willett <swillett@nvidia.com> | 2012-05-21 18:46:54 -0700 |
| commit | 52effd517ca3520d10311be1885f860414928e6f (patch) | |
| tree | 23358ce80f7fafec5ca8779320fddf25b56aa7c3 /arch/arm/Kconfig | |
| parent | acb115ca36385e4ef28a53502c9113c51695597e (diff) | |
ARM: tegra: define/enable ARCH_HAS_SUSPEND_PAGETABLE
For Tegra, the CPU suspend code path installs its own 1:1 pagetable
setup once at init time. This pagetable is used by all CPUs doing
suspend/resume.
We want to use the common ARM code for CPU suspend/resume, but don't
want the MMU reenable code to patch the current pagetable as it's
shared (and could cause problems if the pagetable loads/stores were
were interleaved).
The installed pagetable already covers the cpu_resume_turn_mmu_on
VA, so we're able to just use the existing pagetable. This sets up
the CONFIG option to skip this part of the MMU reenable.
Bug 929856
Change-Id: Ibbac258122df6def7f7a2d511778a6f11d474938
Signed-off-by: Chris Johnson <cwj@nvidia.com>
Reviewed-on: http://git-master/r/92350
Reviewed-by: Sang-Hun Lee <sanlee@nvidia.com>
Tested-by: Sang-Hun Lee <sanlee@nvidia.com>
Reviewed-by: Thomas Cherry <tcherry@nvidia.com>
Reviewed-by: Krishna Reddy <vdumpa@nvidia.com>
Reviewed-by: Ahung Cheng <ahcheng@nvidia.com>
Tested-by: Ahung Cheng <ahcheng@nvidia.com>
Reviewed-on: http://git-master/r/103205
Reviewed-by: Simone Willett <swillett@nvidia.com>
Tested-by: Simone Willett <swillett@nvidia.com>
Diffstat (limited to 'arch/arm/Kconfig')
| -rw-r--r-- | arch/arm/Kconfig | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index fcbd87b17507..5132b50295eb 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -1696,6 +1696,14 @@ config HW_PERF_EVENTS Enable hardware performance counter support for perf events. If disabled, perf events will use software events only. +config ARCH_HAS_SUSPEND_PAGETABLE + bool + help + This option indicates the platform architecture installs its own + 1:1 pagetable during CPU suspend/resume codepaths. This means the + patching of the pagetable as part of reenabling the MMU isn't + needed in the ARM common CPU resume codepath. If in doubt, say N. + source "mm/Kconfig" config FORCE_MAX_ZONEORDER |