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9ae0983847
This change adds infrastructure (CONFIG_TILE_HVGLUE_TRACE) that provides C code wrappers for the calls the kernel makes to the Tilera hypervisor. This allows standard kernel infrastructure like FTRACE to be able to instrument hypervisor calls. To allow direct calls to the true API, we export their names with a leading underscore as well. This is important for the few contexts where we need to make hypervisor calls without touching the stack. As part of this change, we also switch from creating the symbols with linker magic to creating them with assembler magic. This lets us provide a symbol type and generally make them appear more as symbols and less as just random values in the Elf namespace. Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
36 lines
1.1 KiB
Plaintext
36 lines
1.1 KiB
Plaintext
menu "Kernel hacking"
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source "lib/Kconfig.debug"
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config EARLY_PRINTK
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bool "Early printk" if EXPERT && DEBUG_KERNEL
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default y
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help
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Write kernel log output directly via the hypervisor console.
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This is useful for kernel debugging when your machine crashes very
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early before the console code is initialized. For normal operation
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it is not recommended because it looks ugly and doesn't cooperate
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with klogd/syslogd. You should normally N here,
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unless you want to debug such a crash.
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config DEBUG_EXTRA_FLAGS
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string "Additional compiler arguments when building with '-g'"
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depends on DEBUG_INFO
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default ""
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help
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Debug info can be large, and flags like
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`-femit-struct-debug-baseonly' can reduce the kernel file
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size and build time noticeably. Such flags are often
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helpful if the main use of debug info is line number info.
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config TILE_HVGLUE_TRACE
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bool "Provide wrapper functions for hypervisor ABI calls"
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default n
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help
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Provide wrapper functions for the hypervisor ABI calls
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defined in arch/tile/kernel/hvglue.S. This allows tracing
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mechanisms, etc., to have visibility into those calls.
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endmenu
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