diff options
author | Ingo Molnar <mingo@elte.hu> | 2010-10-25 19:38:43 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2010-10-25 19:38:52 +0200 |
commit | 7d7a48b76012eeee25871e1d69104dec4b6d740f (patch) | |
tree | c27e3d8bb2e80ad93c7b4a5c850e1ffbc090bcd2 /arch/x86/kernel/vmlinux.lds.S | |
parent | e4072a9a9d186fe86293effe8828faa4be75b4a4 (diff) | |
parent | 229aebb873e29726b91e076161649cf45154b0bf (diff) |
Merge branch 'linus' into x86/urgent
Merge reason: We want to queue up a dependent fix.
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/vmlinux.lds.S')
-rw-r--r-- | arch/x86/kernel/vmlinux.lds.S | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/arch/x86/kernel/vmlinux.lds.S b/arch/x86/kernel/vmlinux.lds.S index d0bb52296fa3..e03530aebfd0 100644 --- a/arch/x86/kernel/vmlinux.lds.S +++ b/arch/x86/kernel/vmlinux.lds.S @@ -242,6 +242,12 @@ SECTIONS __x86_cpu_dev_end = .; } + /* + * start address and size of operations which during runtime + * can be patched with virtualization friendly instructions or + * baremetal native ones. Think page table operations. + * Details in paravirt_types.h + */ . = ALIGN(8); .parainstructions : AT(ADDR(.parainstructions) - LOAD_OFFSET) { __parainstructions = .; @@ -249,6 +255,11 @@ SECTIONS __parainstructions_end = .; } + /* + * struct alt_inst entries. From the header (alternative.h): + * "Alternative instructions for different CPU types or capabilities" + * Think locking instructions on spinlocks. + */ . = ALIGN(8); .altinstructions : AT(ADDR(.altinstructions) - LOAD_OFFSET) { __alt_instructions = .; @@ -256,11 +267,28 @@ SECTIONS __alt_instructions_end = .; } + /* + * And here are the replacement instructions. The linker sticks + * them as binary blobs. The .altinstructions has enough data to + * get the address and the length of them to patch the kernel safely. + */ .altinstr_replacement : AT(ADDR(.altinstr_replacement) - LOAD_OFFSET) { *(.altinstr_replacement) } /* + * struct iommu_table_entry entries are injected in this section. + * It is an array of IOMMUs which during run time gets sorted depending + * on its dependency order. After rootfs_initcall is complete + * this section can be safely removed. + */ + .iommu_table : AT(ADDR(.iommu_table) - LOAD_OFFSET) { + __iommu_table = .; + *(.iommu_table) + __iommu_table_end = .; + } + . = ALIGN(8); + /* * .exit.text is discard at runtime, not link time, to deal with * references from .altinstructions and .eh_frame */ @@ -273,7 +301,7 @@ SECTIONS } #if !defined(CONFIG_X86_64) || !defined(CONFIG_SMP) - PERCPU(PAGE_SIZE) + PERCPU(THREAD_SIZE) #endif . = ALIGN(PAGE_SIZE); |