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* ARM64 / ACPI: Parse MADT for SMP initializationHanjun Guo2015-03-251-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | MADT contains the information for MPIDR which is essential for SMP initialization, parse the GIC cpu interface structures to get the MPIDR value and map it to cpu_logical_map(), and add enabled cpu with valid MPIDR into cpu_possible_map. ACPI 5.1 only has two explicit methods to boot up SMP, PSCI and Parking protocol, but the Parking protocol is only specified for ARMv7 now, so make PSCI as the only way for the SMP boot protocol before some updates for the ACPI spec or the Parking protocol spec. Parking protocol patches for SMP boot will be sent to upstream when the new version of Parking protocol is ready. CC: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> CC: Catalin Marinas <catalin.marinas@arm.com> CC: Will Deacon <will.deacon@arm.com> CC: Mark Rutland <mark.rutland@arm.com> Tested-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com> Tested-by: Yijing Wang <wangyijing@huawei.com> Tested-by: Mark Langsdorf <mlangsdo@redhat.com> Tested-by: Jon Masters <jcm@redhat.com> Tested-by: Timur Tabi <timur@codeaurora.org> Tested-by: Robert Richter <rrichter@cavium.com> Acked-by: Robert Richter <rrichter@cavium.com> Acked-by: Olof Johansson <olof@lixom.net> Reviewed-by: Grant Likely <grant.likely@linaro.org> Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org> Signed-off-by: Tomasz Nowicki <tomasz.nowicki@linaro.org> Signed-off-by: Will Deacon <will.deacon@arm.com>
* arm64: kernel: enable PSCI cpu operations on UP systemsLorenzo Pieralisi2014-07-181-1/+1
| | | | | | | | | | | | PSCI CPU operations have to be enabled on UP kernels so that calls like eg cpu_suspend can be made functional on UP too. This patch reworks the PSCI CPU operations so that they can be enabled on UP systems. Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* arm64: Slightly improve the warning on CPU0 enable-methodCatalin Marinas2013-10-311-2/+2
| | | | | | | | | | | Commit e8765b265a69 (arm64: read enable-method for CPU0) introduced checks for the enable method on CPU0 (to be later used with CPU suspend). However, if the kernel is compiled for UP and a DT file is used with a method like 'spin-table', Linux complains about 'invalid enable method'. This patch turns it into an 'unsupported enable method' warning. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* ARM64: simplify cpu_read_bootcpu_ops using OF/DT helperSudeep KarkadaNagesha2013-10-301-17/+5
| | | | | | | | | | | | | | | Once the cpu_logical_map for any logical cpu is populated with the corresponding physical identifier(i.e. mpidr), it's device node can be retrieved using the DT helper 'of_get_cpu_node'. Currently the device tree parsing code to get boot cpu node is duplicated in 'cpu_read_bootcpu_ops'. This patch replaces the code parsing the device tree for the boot cpu with of_get_cpu_node. Signed-off-by: Sudeep KarkadaNagesha <sudeep.karkadanagesha@arm.com> Acked-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* arm64: read enable-method for CPU0Mark Rutland2013-10-251-1/+53
| | | | | | | | | | | | | | | | With the advent of CPU_HOTPLUG, the enable-method property for CPU0 may tells us something useful (i.e. how to hotplug it back on), so we must read it along with all the enable-method for all the other CPUs. Even on UP the enable-method may tell us useful information (e.g. if a core has some mechanism that might be usable for cpuidle), so we should always read it. This patch factors out the reading of the enable method, and ensures that CPU0's enable method is read regardless of whether the kernel is built with SMP support. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
* arm64: reorganise smp_enable_opsMark Rutland2013-10-251-0/+47
For hotplug support, we're going to want a place to store operations that do more than bring CPUs online, and it makes sense to group these with our current smp_enable_ops. For cpuidle support, we'll want to group additional functions, and we may want them even for UP kernels. This patch renames smp_enable_ops to the more general cpu_operations, and pulls the definitions out of smp code such that they can be used in UP kernels. While we're at it, fix up instances of the cpu parameter to be an unsigned int, drop the init markings and rename the *_cpu functions to cpu_* to reduce future churn when cpu_operations is extended. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
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