nvidia-tegra-modules.git/include/linux/trusty/sm_err.h, branch rtss22-ae NVIDIA's kernel modules to support tegra chips (used in Jetson boards) Retry NOP smc call when a guest's VIRQ is pending 2018-07-27T21:12:44+00:00 Amith Nuggehalli aramachan@nvidia.com 2017-07-26T00:17:15+00:00 02a7ce99ffe2adc39606d6e277be6593e6c9ea0c In virtualization use case, if a guest's VIRQ is pending at, the hypervisor, the control returns back control immediately to the guest without transitioning to TOS so that the guest's IRQ is handled in time. In such a case, re-try the NOP smc with the same arguments as the previous call as the SMC wouldn't have reached TOS yet. JIRA: SEC-366 Change-Id: Iff0f4fd6aab1369848736a1a7f2fa75afd3616b9 Signed-off-by: Amith Nuggehalli <aramachan@nvidia.com> (cherry picked from commit 585fea50e14410d312c9966f5520af305c56e989) Reviewed-on: https://git-master.nvidia.com/r/1533177 GVS: Gerrit_Virtual_Submit Reviewed-by: Varun Wadekar <vwadekar@nvidia.com> 
In virtualization use case, if a guest's VIRQ is pending at,
the hypervisor, the control returns back control immediately to the guest
without transitioning to TOS so that the guest's IRQ is handled
in time. In such a case, re-try the NOP smc with the same arguments
as the previous call as the SMC wouldn't have reached TOS yet.

JIRA: SEC-366

Change-Id: Iff0f4fd6aab1369848736a1a7f2fa75afd3616b9
Signed-off-by: Amith Nuggehalli <aramachan@nvidia.com>
(cherry picked from commit 585fea50e14410d312c9966f5520af305c56e989)
Reviewed-on: https://git-master.nvidia.com/r/1533177
GVS: Gerrit_Virtual_Submit
Reviewed-by: Varun Wadekar <vwadekar@nvidia.com>
trusty: Add smp support 2018-07-27T21:12:44+00:00 Arve Hjønnevåg arve@android.com 2015-01-24T01:55:48+00:00 b2a435cf6598473a194b4f7168225420f57c218f Add an unlocked nop call to allow multiple cpus to enter trusty. Other standard calls are still serialized to avoid return codes getting mixed up. A new return code is used to indicate that the standard call is running on another cpu. Change-Id: Iccc0785138fbc3eb9daebf22fd79d6c1f9b23f6a Signed-off-by: Arve Hjønnevåg <arve@android.com> 
Add an unlocked nop call to allow multiple cpus to enter trusty.
Other standard calls are still serialized to avoid return codes
getting mixed up.
A new return code is used to indicate that the standard call is
running on another cpu.

Change-Id: Iccc0785138fbc3eb9daebf22fd79d6c1f9b23f6a
Signed-off-by: Arve Hjønnevåg <arve@android.com>
trusty: Handle fiqs without calling notifier and enabling interrupts 2018-07-27T21:12:44+00:00 Arve Hjønnevåg arve@android.com 2015-06-12T02:51:54+00:00 7abcf768d24edb227bc809d819e6b2544c496f34 Change-Id: Iab318f0efd7ca0217bd64a30918f040938af5b76 Signed-off-by: Michael Ryleev <gmar@google.com> 
Change-Id: Iab318f0efd7ca0217bd64a30918f040938af5b76
Signed-off-by: Michael Ryleev <gmar@google.com>
trusty: Add trusty driver 2018-07-27T21:12:44+00:00 Arve Hjønnevåg arve@android.com 2013-11-19T04:46:48+00:00 e9c6d11022d2ac66fbaf30cd07318ca9ddc9d326 includes: Add arm64 support includes: Add trusty_fast_call64 api on 64 bit systems. includes: move probe to subsys_initcall Child devices of trusty like FIQ-based debuggers and watchdogs may want to probe early, move trusty from module init to subsys init to allow it and its children to probe earlier. includes: Retry std_calls on SM_ERR_BUSY If the trusty spinlock is held, or if the strex fails for another reason, trusty returns SM_ERR_BUSY. Add retry code to handle this. Without this retry code, std_calls can fail. If the previous smc call had returned SM_ERR_INTERRUPTED, this failure would cause the driver to get out of sync with trusty. All later calls would then fail with SM_ERR_INTERLEAVED_SMC. Change-Id: I35318be3d41f84b922397e9afdca6bf47d9645db Signed-off-by: Arve Hjønnevåg <arve@android.com> 
includes: Add arm64 support

includes: Add trusty_fast_call64 api on 64 bit systems.

includes: move probe to subsys_initcall

Child devices of trusty like FIQ-based debuggers and watchdogs may
want to probe early, move trusty from module init to subsys init
to allow it and its children to probe earlier.

includes: Retry std_calls on SM_ERR_BUSY

If the trusty spinlock is held, or if the strex fails for another
reason, trusty returns SM_ERR_BUSY. Add retry code to handle this.

Without this retry code, std_calls can fail. If the previous smc
call had returned SM_ERR_INTERRUPTED, this failure would cause
the driver to get out of sync with trusty. All later calls would
then fail with SM_ERR_INTERLEAVED_SMC.

Change-Id: I35318be3d41f84b922397e9afdca6bf47d9645db
Signed-off-by: Arve Hjønnevåg <arve@android.com>