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author | Michael Kelley <mikelley@microsoft.com> | 2021-07-14 11:34:46 -0700 |
---|---|---|
committer | Wei Liu <wei.liu@kernel.org> | 2021-07-15 12:59:45 +0000 |
commit | 9d7cf2c9675838c12cd5cf5a4ebe2ba41bd78a44 (patch) | |
tree | e00c6e6187ddf5fcca3cc30d94e540dc8a0d348b /drivers/hv | |
parent | afca4d95dd7d7936d46a0ff02169cc40f534a6a3 (diff) | |
download | linux-stable-9d7cf2c9675838c12cd5cf5a4ebe2ba41bd78a44.tar.gz linux-stable-9d7cf2c9675838c12cd5cf5a4ebe2ba41bd78a44.tar.bz2 linux-stable-9d7cf2c9675838c12cd5cf5a4ebe2ba41bd78a44.zip |
Drivers: hv: Add arch independent default functions for some Hyper-V handlers
Architecture independent Hyper-V code calls various arch-specific handlers
when needed. To aid in supporting multiple architectures, provide weak
defaults that can be overridden by arch-specific implementations where
appropriate. But when arch-specific overrides aren't needed or haven't
been implemented yet for a particular architecture, these stubs reduce
the amount of clutter under arch/.
No functional change.
Signed-off-by: Michael Kelley <mikelley@microsoft.com>
Link: https://lore.kernel.org/r/1626287687-2045-3-git-send-email-mikelley@microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'drivers/hv')
-rw-r--r-- | drivers/hv/hv_common.c | 49 |
1 files changed, 49 insertions, 0 deletions
diff --git a/drivers/hv/hv_common.c b/drivers/hv/hv_common.c index e836002bc0ce..fe333f410d1d 100644 --- a/drivers/hv/hv_common.c +++ b/drivers/hv/hv_common.c @@ -16,6 +16,7 @@ #include <linux/export.h> #include <linux/bitfield.h> #include <linux/cpumask.h> +#include <linux/ptrace.h> #include <linux/slab.h> #include <asm/hyperv-tlfs.h> #include <asm/mshyperv.h> @@ -202,3 +203,51 @@ bool hv_query_ext_cap(u64 cap_query) return hv_extended_cap & cap_query; } EXPORT_SYMBOL_GPL(hv_query_ext_cap); + +/* These __weak functions provide default "no-op" behavior and + * may be overridden by architecture specific versions. Architectures + * for which the default "no-op" behavior is sufficient can leave + * them unimplemented and not be cluttered with a bunch of stub + * functions in arch-specific code. + */ + +bool __weak hv_is_isolation_supported(void) +{ + return false; +} +EXPORT_SYMBOL_GPL(hv_is_isolation_supported); + +void __weak hv_setup_vmbus_handler(void (*handler)(void)) +{ +} +EXPORT_SYMBOL_GPL(hv_setup_vmbus_handler); + +void __weak hv_remove_vmbus_handler(void) +{ +} +EXPORT_SYMBOL_GPL(hv_remove_vmbus_handler); + +void __weak hv_setup_kexec_handler(void (*handler)(void)) +{ +} +EXPORT_SYMBOL_GPL(hv_setup_kexec_handler); + +void __weak hv_remove_kexec_handler(void) +{ +} +EXPORT_SYMBOL_GPL(hv_remove_kexec_handler); + +void __weak hv_setup_crash_handler(void (*handler)(struct pt_regs *regs)) +{ +} +EXPORT_SYMBOL_GPL(hv_setup_crash_handler); + +void __weak hv_remove_crash_handler(void) +{ +} +EXPORT_SYMBOL_GPL(hv_remove_crash_handler); + +void __weak hyperv_cleanup(void) +{ +} +EXPORT_SYMBOL_GPL(hyperv_cleanup); |