diff options
| author | Sunil Muthuswamy <sunilmut@microsoft.com> | 2021-03-23 21:47:16 +0300 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2021-03-24 14:35:24 +0300 |
| commit | 6dc2a774cb4fdb524b7eb0b8db74198a1b4815ea (patch) | |
| tree | 537cf3fba82d5d7e438f930a428b564c8d6b6e8e /include/asm-generic/mshyperv.h | |
| parent | 1b60280834683dddf4975bbf9662a74f123ba770 (diff) | |
| download | linux-6dc2a774cb4fdb524b7eb0b8db74198a1b4815ea.tar.xz | |
x86/Hyper-V: Support for free page reporting
Linux has support for free page reporting now (36e66c554b5c) for
virtualized environment. On Hyper-V when virtually backed VMs are
configured, Hyper-V will advertise cold memory discard capability,
when supported. This patch adds the support to hook into the free
page reporting infrastructure and leverage the Hyper-V cold memory
discard hint hypercall to report/free these pages back to the host.
Signed-off-by: Sunil Muthuswamy <sunilmut@microsoft.com>
Tested-by: Matheus Castello <matheus@castello.eng.br>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
Tested-by: Nathan Chancellor <nathan@kernel.org>
Link: https://lore.kernel.org/r/SN4PR2101MB0880121FA4E2FEC67F35C1DCC0649@SN4PR2101MB0880.namprd21.prod.outlook.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Diffstat (limited to 'include/asm-generic/mshyperv.h')
| -rw-r--r-- | include/asm-generic/mshyperv.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h index 2d1b6cd9f000..63c0e579bf6d 100644 --- a/include/asm-generic/mshyperv.h +++ b/include/asm-generic/mshyperv.h @@ -27,7 +27,7 @@ struct ms_hyperv_info { u32 features; - u32 features_b; + u32 priv_high; u32 misc_features; u32 hints; u32 nested_features; @@ -179,6 +179,7 @@ bool hv_is_hibernation_supported(void); enum hv_isolation_type hv_get_isolation_type(void); bool hv_is_isolation_supported(void); void hyperv_cleanup(void); +bool hv_query_ext_cap(u64 cap_query); #else /* CONFIG_HYPERV */ static inline bool hv_is_hyperv_initialized(void) { return false; } static inline bool hv_is_hibernation_supported(void) { return false; } |