linux.git/arch/x86/include/asm/uv, branch master

x86/platform/uv: Fix UBSAN array-index-out-of-bounds

2025-12-14T07:46:53+00:00

When UBSAN is enabled, multiple array-index-out-of-bounds messages are
printed:

  [    0.000000] [     T0] UBSAN: array-index-out-of-bounds in arch/x86/kernel/apic/x2apic_uv_x.c:276:23
  [    0.000000] [     T0] index 1 is out of range for type ' [1]'
  ...
  [    0.000000] [     T0] UBSAN: array-index-out-of-bounds in arch/x86/kernel/apic/x2apic_uv_x.c:277:32
  [    0.000000] [     T0] index 1 is out of range for type ' [1]'
  ...
  [    0.000000] [     T0] UBSAN: array-index-out-of-bounds in arch/x86/kernel/apic/x2apic_uv_x.c:282:16
  [    0.000000] [     T0] index 1 is out of range for type ' [1]'
  ...
  [    0.515850] [     T1] UBSAN: array-index-out-of-bounds in arch/x86/kernel/apic/x2apic_uv_x.c:1344:23
  [    0.519851] [     T1] index 1 is out of range for type ' [1]'
  ...
  [    0.603850] [     T1] UBSAN: array-index-out-of-bounds in arch/x86/kernel/apic/x2apic_uv_x.c:1345:32
  [    0.607850] [     T1] index 1 is out of range for type ' [1]'
  ...
  [    0.691850] [     T1] UBSAN: array-index-out-of-bounds in arch/x86/kernel/apic/x2apic_uv_x.c:1353:20
  [    0.695850] [     T1] index 1 is out of range for type ' [1]'

One-element arrays have been deprecated:

  https://docs.kernel.org/process/deprecated.html#zero-length-and-one-element-arrays

Switch entry in struct uv_systab to a flexible array member to fix UBSAN
array-index-out-of-bounds messages.

sizeof(struct uv_systab) is passed to early_memremap() and ioremap(). The
flexible array member is not accessed until the UV system table size is used to
remap the entire UV system table, so changes to sizeof(struct uv_systab) have no
impact.

Signed-off-by: Kyle Meyer 
Signed-off-by: Ingo Molnar 
Link: https://patch.msgid.link/aTxksN-3otY41WvQ@hpe.com

x86/platform/uv: Remove unused declaration uv_irq_2_mmr_info()

2024-08-14T10:49:35+00:00

Commit 43fe1abc18a2 ("x86/uv: Use hierarchical irqdomain to manage UV interrupts")
removed the implementation but left declaration.

Signed-off-by: Yue Haibing 
Signed-off-by: Thomas Gleixner 
Link: https://lore.kernel.org/all/20240814031636.1304772-1-yuehaibing@huawei.com

arch/x86: Fix typos

2024-01-03T10:46:22+00:00

Fix typos, most reported by "codespell arch/x86".  Only touches comments,
no code changes.

Signed-off-by: Bjorn Helgaas 
Signed-off-by: Ingo Molnar 
Reviewed-by: Randy Dunlap 
Link: https://lore.kernel.org/r/20240103004011.1758650-1-helgaas@kernel.org

efi/runtime-wrappers: Remove duplicated macro for service returning void

2023-08-22T08:39:26+00:00

__efi_call_virt() exists as an alternative for efi_call_virt() for the
sole reason that ResetSystem() returns void, and so we cannot use a call
to it in the RHS of an assignment.

Given that there is only a single user, let's drop the macro, and expand
it into the caller. That way, the remaining macro can be tightened
somewhat in terms of type safety too.

Note that the use of typeof() on the runtime service invocation does not
result in an actual call being made, but it does require a few pointer
types to be fixed up and converted into the proper function pointer
prototypes.

Signed-off-by: Ard Biesheuvel

x86/platform/uv: UV support for sub-NUMA clustering

2023-05-31T16:34:59+00:00

Sub-NUMA clustering (SNC) invalidates previous assumptions of a 1:1
relationship between blades, sockets, and nodes.  Fix these
assumptions and build tables correctly when SNC is enabled.

Signed-off-by: Steve Wahl 
Signed-off-by: Dave Hansen 
Link: https://lore.kernel.org/all/20230519190752.3297140-7-steve.wahl%40hpe.com

x86/platform/uv: Introduce helper function uv_pnode_to_socket.

2023-05-31T16:34:59+00:00

Add and use uv_pnode_to_socket() function, which parallels other
helper functions in here, and will enable avoiding duplicate code
in an upcoming patch.

Signed-off-by: Steve Wahl 
Signed-off-by: Dave Hansen 
Link: https://lore.kernel.org/all/20230519190752.3297140-3-steve.wahl%40hpe.com

x86/platform/uv: Add platform resolving #defines for misc GAM_MMIOH_REDIRECT*

2023-05-31T16:34:59+00:00

Upcoming changes will require use of new #defines
UVH_RH_GAM_MMIOH_REDIRECT_CONFIG0_NASID_MASK and
UVH_RH_GAM_MMIOH_REDIRECT_CONFIG1_NASID_MASK, which provide the
appropriate values on different uv platforms.

Also, fix typo that defined a couple of "*_CONFIG0_*" values twice
where "*_CONFIG1_*" was intended.

Signed-off-by: Steve Wahl 
Signed-off-by: Dave Hansen 
Link: https://lore.kernel.org/all/20230519190752.3297140-2-steve.wahl%40hpe.com

x86: Fix various typos in comments

2021-03-18T14:31:53+00:00

Fix ~144 single-word typos in arch/x86/ code comments.

Doing this in a single commit should reduce the churn.

Signed-off-by: Ingo Molnar 
Cc: Borislav Petkov 
Cc: Thomas Gleixner 
Cc: Peter Zijlstra 
Cc: Paolo Bonzini 
Cc: Bjorn Helgaas 
Cc: linux-kernel@vger.kernel.org

x86/platform/uv: Add kernel interfaces for obtaining system info

2020-12-07T18:44:54+00:00

Add kernel interfaces used to obtain info for the uv_sysfs driver
to display.

Signed-off-by: Mike Travis 
Signed-off-by: Borislav Petkov 
Reviewed-by: Steve Wahl 
Acked-by: Hans de Goede 
Link: https://lkml.kernel.org/r/20201128034227.120869-2-mike.travis@hpe.com

x86/platform/uv: Add and export uv_bios_* functions

2020-11-26T11:50:44+00:00

Add additional uv_bios_call() variant functions to expose information
needed by the new uv_sysfs driver. This includes the addition of several
new data types defined by UV BIOS and used in the new functions.

Signed-off-by: Justin Ernst 
Signed-off-by: Borislav Petkov 
Reviewed-by: Steve Wahl 
Acked-by: Hans de Goede 
Link: https://lkml.kernel.org/r/20201125175444.279074-3-justin.ernst@hpe.com