| Message ID | 1578431066-19600-1-git-send-email-eberman@codeaurora.org |
|---|---|
| Headers | show |
| Series | Restructure, improve target support for qcom_scm driver | expand |
Quoting Bjorn Andersson (2020-01-07 22:42:53) > On Tue 07 Jan 13:04 PST 2020, Elliot Berman wrote: > > > This series improves support for 32-bit Qualcomm targets on qcom_scm driver and cleans > > up the driver for 64-bit implementations. > > > > Currently, the qcom_scm driver supports only 64-bit Qualcomm targets and very > > old 32-bit Qualcomm targets. Newer 32-bit targets use ARM's SMC Calling > > Convention to communicate with secure world. Older 32-bit targets use a > > "buffer-based" legacy approach for communicating with secure world (as > > implemented in qcom_scm-32.c). All arm64 Qualcomm targets use ARM SMCCC. > > Currently, SMCCC-based communication is enabled only on ARM64 config and > > buffer-based communication only on ARM config. This patch-series combines SMCCC > > and legacy conventions and selects the correct convention by querying the secure > > world [1]. > > > > We decided to take the opportunity as well to clean up the driver rather than > > try to patch together qcom_scm-32 and qcom_scm-64. > > > > Series applied. Without the change-ids presumably? I was going to review the patch series tomorrow but I guess no more need! ;-)
On Tue 07 Jan 22:54 PST 2020, Stephen Boyd wrote: > Quoting Bjorn Andersson (2020-01-07 22:42:53) > > On Tue 07 Jan 13:04 PST 2020, Elliot Berman wrote: > > > > > This series improves support for 32-bit Qualcomm targets on qcom_scm driver and cleans > > > up the driver for 64-bit implementations. > > > > > > Currently, the qcom_scm driver supports only 64-bit Qualcomm targets and very > > > old 32-bit Qualcomm targets. Newer 32-bit targets use ARM's SMC Calling > > > Convention to communicate with secure world. Older 32-bit targets use a > > > "buffer-based" legacy approach for communicating with secure world (as > > > implemented in qcom_scm-32.c). All arm64 Qualcomm targets use ARM SMCCC. > > > Currently, SMCCC-based communication is enabled only on ARM64 config and > > > buffer-based communication only on ARM config. This patch-series combines SMCCC > > > and legacy conventions and selects the correct convention by querying the secure > > > world [1]. > > > > > > We decided to take the opportunity as well to clean up the driver rather than > > > try to patch together qcom_scm-32 and qcom_scm-64. > > > > > > > Series applied. > > Without the change-ids presumably? Of course. > I was going to review the patch series tomorrow but I guess no more > need! ;-) > Thanks, I do appreciate the intention :) Regards, Bjorn
This series improves support for 32-bit Qualcomm targets on qcom_scm driver and cleans up the driver for 64-bit implementations. Currently, the qcom_scm driver supports only 64-bit Qualcomm targets and very old 32-bit Qualcomm targets. Newer 32-bit targets use ARM's SMC Calling Convention to communicate with secure world. Older 32-bit targets use a "buffer-based" legacy approach for communicating with secure world (as implemented in qcom_scm-32.c). All arm64 Qualcomm targets use ARM SMCCC. Currently, SMCCC-based communication is enabled only on ARM64 config and buffer-based communication only on ARM config. This patch-series combines SMCCC and legacy conventions and selects the correct convention by querying the secure world [1]. We decided to take the opportunity as well to clean up the driver rather than try to patch together qcom_scm-32 and qcom_scm-64. Patches 1-3 and 15 improve macro names, reorder macros/functions, and prune unused macros/functions. No functional changes were introduced. Patches 4-8 clears up the SCM abstraction in qcom_scm-64. Patches 9-14 clears up the SCM abstraction in qcom_scm-32. Patches 16-17 enable dynamically using the different calling conventions. [1]: https://source.codeaurora.org/quic/la/kernel/msm-4.9/tree/drivers/soc/qcom/scm.c?h=kernel.lnx.4.9.r28-rel#n555 Changes since v4: - Restored missing arginfo/args to pas_auth_and_reset Changes since v3: - Updated recepients Changes since v2: - Addressed Stephen's comments throughout v2. - Rebased onto latest for-next branch - Removed v2 08/18 (firmware: qcom_scm-64: Remove qcom_scm_call_do_smccc) - Cleaned up the convention query from v2 to align with [1]. Changes since v1: - Renamed functions/variables per Vinod's suggestions - Split v1 01/17 into v2 [01,02,03]/18 per Vinod's suggestion - Fix suggestions by Bjorn in v1 09/18 (now v2 10/18) - Refactor last 3 commits per Bjorn suggestions in v1 17/18 and v1 10/18 Changes since RFC: - Fixed missing return values in qcom_scm_call_smccc - Fixed order of arguments in qcom_scm_set_warm_boot_addr - Adjusted logic of SMC convention to properly support older QCOM secure worlds - Boot tested on IFC6410 based on linaro kernel tag: debian-qcom-dragonboard410c-18.01 (which does basic verification of legacy SCM calls: at least warm_boot_addr, cold_boot_addr, and power_down) Elliot Berman (17): firmware: qcom_scm: Rename macros and structures firmware: qcom_scm: Apply consistent naming scheme to command IDs firmware: qcom_scm: Remove unused qcom_scm_get_version firmware: qcom_scm-64: Make SMC macros less magical firmware: qcom_scm-64: Move svc/cmd/owner into qcom_scm_desc firmware: qcom_scm-64: Add SCM results struct firmware: qcom_scm-64: Move SMC register filling to qcom_scm_call_smccc firmware: qcom_scm-64: Improve SMC convention detection firmware: qcom_scm-32: Use SMC arch wrappers firmware: qcom_scm-32: Add funcnum IDs firmware: qcom_scm-32: Use qcom_scm_desc in non-atomic calls firmware: qcom_scm-32: Move SMCCC register filling to qcom_scm_call firmware: qcom_scm-32: Create common legacy atomic call firmware: qcom_scm-32: Add device argument to atomic calls firmware: qcom_scm: Order functions, definitions by service/command firmware: qcom_scm: Remove thin wrappers firmware: qcom_scm: Dynamically support SMCCC and legacy conventions drivers/firmware/Kconfig | 8 - drivers/firmware/Makefile | 5 +- drivers/firmware/qcom_scm-32.c | 671 ----------------------------- drivers/firmware/qcom_scm-64.c | 579 ------------------------- drivers/firmware/qcom_scm-legacy.c | 242 +++++++++++ drivers/firmware/qcom_scm-smc.c | 151 +++++++ drivers/firmware/qcom_scm.c | 854 +++++++++++++++++++++++++++++-------- drivers/firmware/qcom_scm.h | 178 ++++---- include/linux/qcom_scm.h | 125 +++--- 9 files changed, 1232 insertions(+), 1581 deletions(-) delete mode 100644 drivers/firmware/qcom_scm-32.c delete mode 100644 drivers/firmware/qcom_scm-64.c create mode 100644 drivers/firmware/qcom_scm-legacy.c create mode 100644 drivers/firmware/qcom_scm-smc.c