Re: [U-Boot] [PATCH] arm64: Add SMC and HVC commands

Hi,

On 6 April 2018 at 18:06, Michalis Pappas mpappas@fastmail.fm wrote:

This patch adds smc and hvc commands, that allow issuing Secure Monitor Calls and Hypervisor Calls conforming to the ARM SMC Calling Convention.

Add Kconfig items to allow each command to be individually enabled.

Signed-off-by: Michalis Pappas mpappas@fastmail.fm

cmd/Kconfig | 14 ++++++++++ cmd/Makefile | 2 ++ cmd/smccc.c | 72 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 88 insertions(+) create mode 100644 cmd/smccc.c

diff --git a/cmd/Kconfig b/cmd/Kconfig index 136836d146..bed6835eca 100644 --- a/cmd/Kconfig +++ b/cmd/Kconfig @@ -1348,6 +1348,20 @@ config CMD_HASH saved to memory or to an environment variable. It is also possible to verify a hash against data in memory.

+config CMD_HVC

•   bool "Support the 'hvc' command"
  

•   depends on ARM64
  

•   default n
  

•   help
  

•     Allows issuing Hypervisor Calls (HVCs)
  

Please expand on this. Why do you want to do this, what sort of things can you do?

Other than that:

Reviewed-by: Simon Glass sjg@chromium.org