linux.git/arch/sparc/kernel/setup_64.c, branch v4.13

sparc64: recognize and support sparc M8 cpu type

2017-08-04T18:08:53+00:00

Recognize SPARC-M8 cpu type, hardware caps and cpu
distribution map.

Signed-off-by: Allen Pais 
Signed-off-by: David Aldridge 
Signed-off-by: David S. Miller

sparc64: initialize time early

2017-06-12T22:44:03+00:00

In Linux it is possible to configure printk() to output timestamp next to
every line. This is very useful to determine the slow parts of the boot
process, and also to avoid regressions, as boot time is visiable to
everyone.

Also, there are scripts that change these time stamps to intervals.

However, on larger machines these timestamps start appearing many seconds,
and even minutes into the boot process. This patch gets stick-frequency
property early from OpenBoot, and uses its value to initialize time stamps
before the first printk() messages are printed.

Signed-off-by: Pavel Tatashin 
Reviewed-by: Shannon Nelson 
Reviewed-by: Steven Sistare 
Signed-off-by: David S. Miller

sparc64: remove trailing white spaces

2017-06-12T22:44:01+00:00

A few changes that were reported by checkpatch, removed all trailing white
spaces in these two files.

Signed-off-by: Pavel Tatashin 
Reviewed-by: Shannon Nelson 
Signed-off-by: David S. Miller

sparc: Remove redundant tests in boot_flags_init().

2017-05-03T15:28:48+00:00

The test:

	*commands && *commands == ' '

is equivalent to:

	*commands == ' '

Reported-by: David Binderman 
Signed-off-by: David S. Miller

sparc64: Fix irq stack bootmem allocation.

2016-09-28T15:24:03+00:00

Currently, irq stack bootmem is allocated for all possible cpus
before nr_cpus value changes the list of possible cpus. As a result,
there is unnecessary wastage of bootmemory.

Move the irq stack bootmem allocation so that it happens after
possible cpu list is modified based on nr_cpus value.

Signed-off-by: Atish Patra 
Reviewed-by: Bob Picco 
Reviewed-by: Vijay Kumar 
Signed-off-by: David S. Miller

sparc64: Fix cpu_possible_mask if nr_cpus is set

2016-09-28T15:24:02+00:00

If kernel boot parameter nr_cpus is set, it should define the number
of CPUs that can ever be available in the system i.e.
cpu_possible_mask. setup_nr_cpu_ids() overrides the nr_cpu_ids based
on the cpu_possible_mask during kernel initialization. If
cpu_possible_mask is not set based on the nr_cpus value, earlier part
of the kernel would be initialized using nr_cpus value leading to a
kernel crash.

Set cpu_possible_mask based on nr_cpus value. Thus setup_nr_cpu_ids()
becomes redundant and does not corrupt nr_cpu_ids value.

Signed-off-by: Atish Patra 
Reviewed-by: Bob Picco 
Reviewed-by: Vijay Kumar 
Signed-off-by: David S. Miller

sparc64: recognize and support Sonoma CPU type

2016-04-21T20:43:47+00:00

Add code to recognize SPARC-Sonoma cpu correctly and update cpu hardware
caps and cpu distribution map. SPARC-Sonoma is based upon SPARC-M7 core
along with additional PCI functions added on and is reported by firmware
as "SPARC-SN".

Signed-off-by: Khalid Aziz 
Acked-by: Allen Pais 
Signed-off-by: David S. Miller

sparc: Convert naked unsigned uses to unsigned int

2016-03-21T04:28:58+00:00

Use the more normal kernel definition/declaration style.

Done via:

$ git ls-files arch/sparc | \
  xargs ./scripts/checkpatch.pl -f --fix-inplace --types=unspecified_int

Signed-off-by: Joe Perches 
Signed-off-by: David S. Miller

sparc64: Add ADI capability to cpu capabilities

2015-12-24T17:05:06+00:00

Add ADI (Application Data Integrity) capability to cpu capabilities list.
ADI capability allows virtual addresses to be encoded with a tag in
bits 63-60. This tag serves as an access control key for the regions
of virtual address with ADI enabled and a key set on them. Hypervisor
encodes this capability as "adp" in "hwcap-list" property in machine
description.

Signed-off-by: Khalid Aziz 
Signed-off-by: David S. Miller

sparc: Resolve conflict between sparc v9 and M7 on usage of bit 9 of TTE

2015-06-01T05:15:01+00:00

sparc: Resolve conflict between sparc v9 and M7 on usage of bit 9 of TTE

Bit 9 of TTE is CV (Cacheable in V-cache) on sparc v9 processor while
the same bit 9 is MCDE (Memory Corruption Detection Enable) on M7
processor. This creates a conflicting usage of the same bit. Kernel
sets TTE.cv bit on all pages for sun4v architecture which works well
for sparc v9 but enables memory corruption detection on M7 processor
which is not the intent. This patch adds code to determine if kernel
is running on M7 processor and takes steps to not enable memory
corruption detection in TTE erroneously.

Signed-off-by: Khalid Aziz 
Signed-off-by: David S. Miller