linux-stable.git/arch/powerpc/kernel/prom.c, branch linux-5.0.y

powerpc/prom: move the device tree if not in declared memory.

2018-12-20T11:21:20+00:00

If the device tree doesn't reside in the memory which is declared
inside it, it has to be moved as well as this memory will not be
mapped by the kernel.

Signed-off-by: Christophe Leroy 
Signed-off-by: Michael Ellerman

powerpc/prom: fix early DEBUG messages

2018-12-20T11:21:20+00:00

This patch fixes early DEBUG messages in prom.c:
- Use %px instead of %p to see the addresses
- Cast memblock_phys_mem_size() with (unsigned long long) to
avoid build failure when phys_addr_t is not 64 bits.

Signed-off-by: Christophe Leroy 
Signed-off-by: Michael Ellerman

memblock: rename memblock_alloc{_nid,_try_nid} to memblock_phys_alloc*

2018-10-31T15:54:15+00:00

Make it explicit that the caller gets a physical address rather than a
virtual one.

This will also allow using meblock_alloc prefix for memblock allocations
returning virtual address, which is done in the following patches.

The conversion is done using the following semantic patch:

@@
expression e1, e2, e3;
@@
(
- memblock_alloc(e1, e2)
+ memblock_phys_alloc(e1, e2)
|
- memblock_alloc_nid(e1, e2, e3)
+ memblock_phys_alloc_nid(e1, e2, e3)
|
- memblock_alloc_try_nid(e1, e2, e3)
+ memblock_phys_alloc_try_nid(e1, e2, e3)
)

Link: http://lkml.kernel.org/r/1536927045-23536-7-git-send-email-rppt@linux.vnet.ibm.com
Signed-off-by: Mike Rapoport 
Acked-by: Michal Hocko 
Cc: Catalin Marinas 
Cc: Chris Zankel 
Cc: "David S. Miller" 
Cc: Geert Uytterhoeven 
Cc: Greentime Hu 
Cc: Greg Kroah-Hartman 
Cc: Guan Xuetao 
Cc: Ingo Molnar 
Cc: "James E.J. Bottomley" 
Cc: Jonas Bonn 
Cc: Jonathan Corbet 
Cc: Ley Foon Tan 
Cc: Mark Salter 
Cc: Martin Schwidefsky 
Cc: Matt Turner 
Cc: Michael Ellerman 
Cc: Michal Simek 
Cc: Palmer Dabbelt 
Cc: Paul Burton 
Cc: Richard Kuo 
Cc: Richard Weinberger 
Cc: Rich Felker 
Cc: Russell King 
Cc: Serge Semin 
Cc: Thomas Gleixner 
Cc: Tony Luck 
Cc: Vineet Gupta 
Cc: Yoshinori Sato 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

powerpc: clean the inclusion of stringify.h

2018-07-30T12:48:17+00:00

Only include linux/stringify.h is files using __stringify()

Signed-off-by: Christophe Leroy 
Signed-off-by: Michael Ellerman

powerpc/mm: Check memblock_add against MAX_PHYSMEM_BITS range

2018-07-24T12:03:16+00:00

With SPARSEMEM config enabled, we make sure that we don't add sections beyond
MAX_PHYSMEM_BITS range. This results in not building vmemmap mapping for
range beyond max range. But our memblock layer looks the device tree and create
mapping for the full memory range. Prevent this by checking against
MAX_PHSYSMEM_BITS when doing memblock_add.

We don't do similar check for memeblock_reserve_range. If reserve range is beyond
MAX_PHYSMEM_BITS we expect that to be configured with 'nomap'. Any other
reserved range should come from existing memblock ranges which we already
filtered while adding.

This avoids crash as below when running on a system with system ram config above
MAX_PHSYSMEM_BITS

 Unable to handle kernel paging request for data at address 0xc00a001000000440
 Faulting instruction address: 0xc000000001034118
 cpu 0x0: Vector: 300 (Data Access) at [c00000000124fb30]
     pc: c000000001034118: __free_pages_bootmem+0xc0/0x1c0
     lr: c00000000103b258: free_all_bootmem+0x19c/0x22c
     sp: c00000000124fdb0
    msr: 9000000002001033
    dar: c00a001000000440
  dsisr: 40000000
   current = 0xc00000000120dd00
   paca    = 0xc000000001f60000^I irqmask: 0x03^I irq_happened: 0x01
     pid   = 0, comm = swapper
 [c00000000124fe20] c00000000103b258 free_all_bootmem+0x19c/0x22c
 [c00000000124fee0] c000000001010a68 mem_init+0x3c/0x5c
 [c00000000124ff00] c00000000100401c start_kernel+0x298/0x5e4
 [c00000000124ff90] c00000000000b57c start_here_common+0x1c/0x520

Signed-off-by: Aneesh Kumar K.V 
Signed-off-by: Michael Ellerman

powerpc/prom: Drop support for old FDT versions

2018-05-11T13:29:04+00:00

In commit e6a6928c3ea1 ("of/fdt: Convert FDT functions to use
libfdt") (Apr 2014), the generic flat device tree code dropped support
for flat device tree's older than version 0x10 (16).

We still have code in our CPU scanning to cope with flat device tree
versions earlier than 2, which can now never trigger, so drop it.

Signed-off-by: Michael Ellerman

Merge branch 'topic/paca' into next

2018-03-30T22:09:36+00:00

Bring in yet another series that touches KVM code, and might need to
be merged into the kvm-ppc branch to resolve conflicts.

This required some changes in pnv_power9_force_smt4_catch/release()
due to the paca array becomming an array of pointers.

powerpc/64: Defer paca allocation until memory topology is discovered

2018-03-30T12:34:28+00:00

Signed-off-by: Nicholas Piggin 
[mpe: Rename the dummy allocate_pacas() to fix 32-bit build]
Signed-off-by: Michael Ellerman

powerpc/setup: Add cpu_to_phys_id array

2018-03-30T12:34:27+00:00

Build an array that finds hardware CPU number from logical CPU
number in firmware CPU discovery. Use that rather than setting
paca of other CPUs directly, to begin with. Subsequent patch will
not have pacas allocated at this point.

Signed-off-by: Nicholas Piggin 
[mpe: Fix SMP=n build by adding #ifdef in arch_match_cpu_phys_id()]
Signed-off-by: Michael Ellerman

powerpc/prom: Remove warning on array size when empty

2018-03-13T04:50:40+00:00

When neither CONFIG_ALTIVEC, nor CONFIG_VSX or CONFIG_PPC64 is
defined, the array feature_properties is defined as an empty array,
which in turn triggers the following warning (treated as error on
W=1):

  arch/powerpc/kernel/prom.c: In function ‘check_cpu_feature_properties’:
  arch/powerpc/kernel/prom.c:298:16: error: comparison of unsigned expression < 0 is always false
    for (i = 0; i < ARRAY_SIZE(feature_properties); ++i, ++fp) {
                  ^

Suggested-by: Michael Ellerman 
Signed-off-by: Mathieu Malaterre 
Signed-off-by: Michael Ellerman