Merge tag 'x86-cleanups-2021-06-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 cleanups from Ingo Molnar:
 "Misc cleanups & removal of obsolete code"

* tag 'x86-cleanups-2021-06-28' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/sgx: Correct kernel-doc's arg name in sgx_encl_release()
  doc: Remove references to IBM Calgary
  x86/setup: Document that Windows reserves the first MiB
  x86/crash: Remove crash_reserve_low_1M()
  x86/setup: Remove CONFIG_X86_RESERVE_LOW and reservelow= options
  x86/alternative: Align insn bytes vertically
  x86: Fix leftover comment typos
  x86/asm: Simplify __smp_mb() definition
  x86/alternatives: Make the x86nops[] symbol static

2 files changed, 1 insertions, 35 deletions

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index ef5048c127a3..1347b2c33451 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -4775,11 +4775,6 @@
 			Reserves a hole at the top of the kernel virtual
 			address space.
 
-	reservelow=	[X86]
-			Format: nn[K]
-			Set the amount of memory to reserve for BIOS at
-			the bottom of the address space.
-
 	reset_devices	[KNL] Force drivers to reset the underlying device
 			during initialization.
 
diff --git a/Documentation/x86/x86_64/boot-options.rst b/Documentation/x86/x86_64/boot-options.rst
index 324cefff92e7..5f62b3b86357 100644
--- a/Documentation/x86/x86_64/boot-options.rst
+++ b/Documentation/x86/x86_64/boot-options.rst
@@ -247,16 +247,11 @@ Multiple x86-64 PCI-DMA mapping implementations exist, for example:
       Kernel boot message: "PCI-DMA: Using software bounce buffering
       for IO (SWIOTLB)"
 
-   4. <arch/x86_64/pci-calgary.c> : IBM Calgary hardware IOMMU. Used in IBM
-      pSeries and xSeries servers. This hardware IOMMU supports DMA address
-      mapping with memory protection, etc.
-      Kernel boot message: "PCI-DMA: Using Calgary IOMMU"
-
 ::
 
   iommu=[<size>][,noagp][,off][,force][,noforce]
   [,memaper[=<order>]][,merge][,fullflush][,nomerge]
-  [,noaperture][,calgary]
+  [,noaperture]
 
 General iommu options:
 
@@ -295,8 +290,6 @@ iommu options only relevant to the AMD GART hardware IOMMU:
       Don't initialize the AGP driver and use full aperture.
     panic
       Always panic when IOMMU overflows.
-    calgary
-      Use the Calgary IOMMU if it is available
 
 iommu options only relevant to the software bounce buffering (SWIOTLB) IOMMU
 implementation:
@@ -307,28 +300,6 @@ implementation:
       force
         Force all IO through the software TLB.
 
-Settings for the IBM Calgary hardware IOMMU currently found in IBM
-pSeries and xSeries machines
-
-    calgary=[64k,128k,256k,512k,1M,2M,4M,8M]
-      Set the size of each PCI slot's translation table when using the
-      Calgary IOMMU. This is the size of the translation table itself
-      in main memory. The smallest table, 64k, covers an IO space of
-      32MB; the largest, 8MB table, can cover an IO space of 4GB.
-      Normally the kernel will make the right choice by itself.
-    calgary=[translate_empty_slots]
-      Enable translation even on slots that have no devices attached to
-      them, in case a device will be hotplugged in the future.
-    calgary=[disable=<PCI bus number>]
-      Disable translation on a given PHB. For
-      example, the built-in graphics adapter resides on the first bridge
-      (PCI bus number 0); if translation (isolation) is enabled on this
-      bridge, X servers that access the hardware directly from user
-      space might stop working. Use this option if you have devices that
-      are accessed from userspace directly on some PCI host bridge.
-    panic
-      Always panic when IOMMU overflows
-
 
 Miscellaneous
 =============