Replace calls to bus_generic_attach with bus_attach_children

Reviewed by: imp
Differential Revision: https://reviews.freebsd.org/D47675

dev/psci: Make SMCCC into a real driver

This will be used by other drivers that manage SMCCC firmware services
to use as an attachment point.

Sponsored by: Arm Ltd
Differential Revision: https://re

dev/psci: Make SMCCC into a real driver

This will be used by other drivers that manage SMCCC firmware services
to use as an attachment point.

Sponsored by: Arm Ltd
Differential Revision: https://reviews.freebsd.org/D46988

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sys: Use the new arm_smccc_invoke macros

Simplify the calls into the SMCCC firmware with the new
arm_smccc_invoke* macros.

Sponsored by: Arm Ltd
Differential Revision: https://reviews.freebsd.org/D

sys: Use the new arm_smccc_invoke macros

Simplify the calls into the SMCCC firmware with the new
arm_smccc_invoke* macros.

Sponsored by: Arm Ltd
Differential Revision: https://reviews.freebsd.org/D46987

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sys: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remov

sys: Automated cleanup of cdefs and other formatting

Apply the following automated changes to try to eliminate
no-longer-needed sys/cdefs.h includes as well as now-empty
blank lines in a row.

Remove /^#if.*\n#endif.*\n#include\s+<sys/cdefs.h>.*\n/
Remove /\n+#include\s+<sys/cdefs.h>.*\n+#if.*\n#endif.*\n+/
Remove /\n+#if.*\n#endif.*\n+/
Remove /^#if.*\n#endif.*\n/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/types.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/param.h>/
Remove /\n+#include\s+<sys/cdefs.h>\n#include\s+<sys/capsicum.h>/

Sponsored by: Netflix

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Check SMCCC is ready before using

Add asserts to check SMCCC has been initialised before callers try to
use it.

Reviewed by: emaste
Sponsored by: Arm Ltd
Differential Revision: https://reviews.free

Check SMCCC is ready before using

Add asserts to check SMCCC has been initialised before callers try to
use it.

Reviewed by: emaste
Sponsored by: Arm Ltd
Differential Revision: https://reviews.freebsd.org/D41917

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sys: Remove $FreeBSD$: one-line .c pattern

Remove /^[\s*]*__FBSDID\("\$FreeBSD\$"\);?\s*\n/

Make SMCCC usable by device drivers

To allow device drivers to call into SMCCC we need to initialise it
earlier. As it depends on PSCI, and that is detected via ACPI or FDT
move the call to smccc_in

Make SMCCC usable by device drivers

To allow device drivers to call into SMCCC we need to initialise it
earlier. As it depends on PSCI, and that is detected via ACPI or FDT
move the call to smccc_init to the PSCI driver.

Add a function for drivers to read the smccc version, or 0 if smccc
is not present.

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MFH @ r337607, in preparation for boarding

Merge ^/head r336870 through r337285, and resolve conflicts.

Use int for the pcpu_ssbd argument. This is included from userland and may
not include the needed headers to get the bool definition.

Reported by: manu
Pointy hat to: andrew
Sponsored by: DARPA, AFRL

Implement the SSBD (CVE-2018-3639) workaround on arm64

This calls into the Arm Trusted Firmware to enable and disable the
workaround for the Speculative Store Bypass Disable (SSBD) issue, also
known

Implement the SSBD (CVE-2018-3639) workaround on arm64

This calls into the Arm Trusted Firmware to enable and disable the
workaround for the Speculative Store Bypass Disable (SSBD) issue, also
known as Spectre Variant 4.

As this may have a large performance overhead, and how exploitable SSBD is
is unknown we follow the Linux lead of allowing the administrator to select
between always on, always off, or only enabled in the kernel, with the
latter being the default.

PR: 228955
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D15819

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Move the SMCCC SYSINIT later in the boot so the psci driver has attached.

Sponsored by: DARPA, AFRL

Add support for the ARM SMC Calling Convention (SMCCC). This is a method
to call into the firmware in a similar way to the existing PSCI, and used
PSCI to detect when SMCCC is enabled.

There is a fu

Add support for the ARM SMC Calling Convention (SMCCC). This is a method
to call into the firmware in a similar way to the existing PSCI, and used
PSCI to detect when SMCCC is enabled.

There is a function ID space we can use. Currently we only support 3
functions in the ARM Architecture Calls region, however it is expected we
will expend these in the future.

Sponsored by: DARPA, AFRL

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