diff options
| author | Nuno Das Neves <nunodasneves@linux.microsoft.com> | 2025-02-21 11:56:34 -0800 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2025-02-22 02:21:45 +0000 |
| commit | db912b8954c23a55dbc6dc683e0e06ffcb433848 (patch) | |
| tree | 8a933867846cc3e373233cf25371f6c79f267502 /include/asm-generic | |
| parent | 9d8731a1757bef8630cb47e5ae3a1abbcf863e90 (diff) | |
hyperv: Change hv_root_partition into a function
Introduce hv_curr_partition_type to store the partition type
as an enum.
Right now this is limited to guest or root partition, but there will
be other kinds in future and the enum is easily extensible.
Set up hv_curr_partition_type early in Hyper-V initialization with
hv_identify_partition_type(). hv_root_partition() just queries this
value, and shouldn't be called before that.
Making this check into a function sets the stage for adding a config
option to gate the compilation of root partition code. In particular,
hv_root_partition() can be stubbed out always be false if root
partition support isn't desired.
Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com>
Reviewed-by: Easwar Hariharan <eahariha@linux.microsoft.com>
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Link: https://lore.kernel.org/r/1740167795-13296-3-git-send-email-nunodasneves@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Message-ID: <1740167795-13296-3-git-send-email-nunodasneves@linux.microsoft.com>
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/mshyperv.h | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h index 3f115e2bcdaa..54ebd630e72c 100644 --- a/include/asm-generic/mshyperv.h +++ b/include/asm-generic/mshyperv.h @@ -28,6 +28,11 @@ #define VTPM_BASE_ADDRESS 0xfed40000 +enum hv_partition_type { + HV_PARTITION_TYPE_GUEST, + HV_PARTITION_TYPE_ROOT, +}; + struct ms_hyperv_info { u32 features; u32 priv_high; @@ -59,6 +64,7 @@ struct ms_hyperv_info { extern struct ms_hyperv_info ms_hyperv; extern bool hv_nested; extern u64 hv_current_partition_id; +extern enum hv_partition_type hv_curr_partition_type; extern void * __percpu *hyperv_pcpu_input_arg; extern void * __percpu *hyperv_pcpu_output_arg; @@ -190,8 +196,6 @@ void hv_remove_crash_handler(void); extern int vmbus_interrupt; extern int vmbus_irq; -extern bool hv_root_partition; - #if IS_ENABLED(CONFIG_HYPERV) /* * Hypervisor's notion of virtual processor ID is different from @@ -213,6 +217,7 @@ void __init hv_common_free(void); void __init ms_hyperv_late_init(void); int hv_common_cpu_init(unsigned int cpu); int hv_common_cpu_die(unsigned int cpu); +void hv_identify_partition_type(void); void *hv_alloc_hyperv_page(void); void *hv_alloc_hyperv_zeroed_page(void); @@ -310,6 +315,7 @@ void hyperv_cleanup(void); bool hv_query_ext_cap(u64 cap_query); void hv_setup_dma_ops(struct device *dev, bool coherent); #else /* CONFIG_HYPERV */ +static inline void hv_identify_partition_type(void) {} static inline bool hv_is_hyperv_initialized(void) { return false; } static inline bool hv_is_hibernation_supported(void) { return false; } static inline void hyperv_cleanup(void) {} @@ -321,4 +327,9 @@ static inline enum hv_isolation_type hv_get_isolation_type(void) } #endif /* CONFIG_HYPERV */ +static inline bool hv_root_partition(void) +{ + return hv_curr_partition_type == HV_PARTITION_TYPE_ROOT; +} + #endif |