On Friday 29 July 2016 11:59 AM, Keerthy wrote:
On SoCs like DRA7, OMAP5 one cannot enable hypervisor mode directly from the
u-boot because the ROM code puts the chip to supervisor mode after it
jumps to boot loader.
Patch 1: Introduces a weak function which can be overridden specific to
SoCs to switch to hypervisor mode.
Patch 2: overrides weak function in patch 1 switch cpu to hypervisor
mode using the available ROM code hook early in the boot phase before
the boot loader checks for hypervisor mode on OMAP5 based SoCs.
Hi Tom,
I request you to hold on merge of this series. I am doing some
performance measurements. I see some drop. So analyzing and root causing.
Thanks,
Keerthy
Changes in v2:
* Fixed a compile time error on older defconfigs due to #ifdef
issue.
Boot tested on DRA7-EVM and DRA72-EVM.
Keerthy (2):
ARM: Introduce function to switch to hypervisor mode
ARM: OMAP5+: Override switch_to_hypervisor function
arch/arm/cpu/armv7/omap-common/lowlevel_init.S | 21 +++++++++++++++++++++
arch/arm/cpu/armv7/start.S | 15 +++++++++++++++
arch/arm/include/asm/system.h | 1 +
3 files changed, 37 insertions(+)
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