Merge tag 'hyperv-next-signed-20260218' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux

Pull Hyper-V updates from Wei Liu:

 - Debugfs support for MSHV statistics (Nuno Das Neves)

 - Support for the integrated scheduler (Stanislav Kinsburskii)

 - Various fixes for MSHV memory management and hypervisor status
   handling (Stanislav Kinsburskii)

 - Expose more capabilities and flags for MSHV partition management
   (Anatol Belski, Muminul Islam, Magnus Kulke)

 - Miscellaneous fixes to improve code quality and stability (Carlos
   López, Ethan Nelson-Moore, Li RongQing, Michael Kelley, Mukesh
   Rathor, Purna Pavan Chandra Aekkaladevi, Stanislav Kinsburskii, Uros
   Bizjak)

 - PREEMPT_RT fixes for vmbus interrupts (Jan Kiszka)

* tag 'hyperv-next-signed-20260218' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux: (34 commits)
  mshv: Handle insufficient root memory hypervisor statuses
  mshv: Handle insufficient contiguous memory hypervisor status
  mshv: Introduce hv_deposit_memory helper functions
  mshv: Introduce hv_result_needs_memory() helper function
  mshv: Add SMT_ENABLED_GUEST partition creation flag
  mshv: Add nested virtualization creation flag
  Drivers: hv: vmbus: Simplify allocation of vmbus_evt
  mshv: expose the scrub partition hypercall
  mshv: Add support for integrated scheduler
  mshv: Use try_cmpxchg() instead of cmpxchg()
  x86/hyperv: Fix error pointer dereference
  x86/hyperv: Reserve 3 interrupt vectors used exclusively by MSHV
  Drivers: hv: vmbus: Use kthread for vmbus interrupts on PREEMPT_RT
  x86/hyperv: Remove ASM_CALL_CONSTRAINT with VMMCALL insn
  x86/hyperv: Use savesegment() instead of inline asm() to save segment registers
  mshv: fix SRCU protection in irqfd resampler ack handler
  mshv: make field names descriptive in a header struct
  x86/hyperv: Update comment in hyperv_cleanup()
  mshv: clear eventfd counter on irqfd shutdown
  x86/hyperv: Use memremap()/memunmap() instead of ioremap_cache()/iounmap()
  ...

5 files changed, 63 insertions, 28 deletions

diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h
index ecedab554c80..d37b68238c97 100644
--- a/include/asm-generic/mshyperv.h
+++ b/include/asm-generic/mshyperv.h
@@ -342,6 +342,9 @@ static inline bool hv_parent_partition(void)
 {
 	return hv_root_partition() || hv_l1vh_partition();
 }
+
+bool hv_result_needs_memory(u64 status);
+int hv_deposit_memory_node(int node, u64 partition_id, u64 status);
 int hv_call_deposit_pages(int node, u64 partition_id, u32 num_pages);
 int hv_call_add_logical_proc(int node, u32 lp_index, u32 acpi_id);
 int hv_call_create_vp(int node, u64 partition_id, u32 vp_index, u32 flags);
@@ -350,6 +353,11 @@ int hv_call_create_vp(int node, u64 partition_id, u32 vp_index, u32 flags);
 static inline bool hv_root_partition(void) { return false; }
 static inline bool hv_l1vh_partition(void) { return false; }
 static inline bool hv_parent_partition(void) { return false; }
+static inline bool hv_result_needs_memory(u64 status) { return false; }
+static inline int hv_deposit_memory_node(int node, u64 partition_id, u64 status)
+{
+	return -EOPNOTSUPP;
+}
 static inline int hv_call_deposit_pages(int node, u64 partition_id, u32 num_pages)
 {
 	return -EOPNOTSUPP;
@@ -364,6 +372,11 @@ static inline int hv_call_create_vp(int node, u64 partition_id, u32 vp_index, u3
 }
 #endif /* CONFIG_MSHV_ROOT */
 
+static inline int hv_deposit_memory(u64 partition_id, u64 status)
+{
+	return hv_deposit_memory_node(NUMA_NO_NODE, partition_id, status);
+}
+
 #if IS_ENABLED(CONFIG_HYPERV_VTL_MODE)
 u8 __init get_vtl(void);
 #else
diff --git a/include/hyperv/hvgdk_mini.h b/include/hyperv/hvgdk_mini.h
index 30fbbde81c5c..056ef7b6b360 100644
--- a/include/hyperv/hvgdk_mini.h
+++ b/include/hyperv/hvgdk_mini.h
@@ -14,33 +14,36 @@ struct hv_u128 {
 } __packed;
 
 /* NOTE: when adding below, update hv_result_to_string() */
-#define HV_STATUS_SUCCESS			    0x0
-#define HV_STATUS_INVALID_HYPERCALL_CODE	    0x2
-#define HV_STATUS_INVALID_HYPERCALL_INPUT	    0x3
-#define HV_STATUS_INVALID_ALIGNMENT		    0x4
-#define HV_STATUS_INVALID_PARAMETER		    0x5
-#define HV_STATUS_ACCESS_DENIED			    0x6
-#define HV_STATUS_INVALID_PARTITION_STATE	    0x7
-#define HV_STATUS_OPERATION_DENIED		    0x8
-#define HV_STATUS_UNKNOWN_PROPERTY		    0x9
-#define HV_STATUS_PROPERTY_VALUE_OUT_OF_RANGE	    0xA
-#define HV_STATUS_INSUFFICIENT_MEMORY		    0xB
-#define HV_STATUS_INVALID_PARTITION_ID		    0xD
-#define HV_STATUS_INVALID_VP_INDEX		    0xE
-#define HV_STATUS_NOT_FOUND			    0x10
-#define HV_STATUS_INVALID_PORT_ID		    0x11
-#define HV_STATUS_INVALID_CONNECTION_ID		    0x12
-#define HV_STATUS_INSUFFICIENT_BUFFERS		    0x13
-#define HV_STATUS_NOT_ACKNOWLEDGED		    0x14
-#define HV_STATUS_INVALID_VP_STATE		    0x15
-#define HV_STATUS_NO_RESOURCES			    0x1D
-#define HV_STATUS_PROCESSOR_FEATURE_NOT_SUPPORTED   0x20
-#define HV_STATUS_INVALID_LP_INDEX		    0x41
-#define HV_STATUS_INVALID_REGISTER_VALUE	    0x50
-#define HV_STATUS_OPERATION_FAILED		    0x71
-#define HV_STATUS_TIME_OUT			    0x78
-#define HV_STATUS_CALL_PENDING			    0x79
-#define HV_STATUS_VTL_ALREADY_ENABLED		    0x86
+#define HV_STATUS_SUCCESS				0x0
+#define HV_STATUS_INVALID_HYPERCALL_CODE		0x2
+#define HV_STATUS_INVALID_HYPERCALL_INPUT		0x3
+#define HV_STATUS_INVALID_ALIGNMENT			0x4
+#define HV_STATUS_INVALID_PARAMETER			0x5
+#define HV_STATUS_ACCESS_DENIED				0x6
+#define HV_STATUS_INVALID_PARTITION_STATE		0x7
+#define HV_STATUS_OPERATION_DENIED			0x8
+#define HV_STATUS_UNKNOWN_PROPERTY			0x9
+#define HV_STATUS_PROPERTY_VALUE_OUT_OF_RANGE		0xA
+#define HV_STATUS_INSUFFICIENT_MEMORY			0xB
+#define HV_STATUS_INVALID_PARTITION_ID			0xD
+#define HV_STATUS_INVALID_VP_INDEX			0xE
+#define HV_STATUS_NOT_FOUND				0x10
+#define HV_STATUS_INVALID_PORT_ID			0x11
+#define HV_STATUS_INVALID_CONNECTION_ID			0x12
+#define HV_STATUS_INSUFFICIENT_BUFFERS			0x13
+#define HV_STATUS_NOT_ACKNOWLEDGED			0x14
+#define HV_STATUS_INVALID_VP_STATE			0x15
+#define HV_STATUS_NO_RESOURCES				0x1D
+#define HV_STATUS_PROCESSOR_FEATURE_NOT_SUPPORTED	0x20
+#define HV_STATUS_INVALID_LP_INDEX			0x41
+#define HV_STATUS_INVALID_REGISTER_VALUE		0x50
+#define HV_STATUS_OPERATION_FAILED			0x71
+#define HV_STATUS_INSUFFICIENT_ROOT_MEMORY		0x73
+#define HV_STATUS_INSUFFICIENT_CONTIGUOUS_MEMORY	0x75
+#define HV_STATUS_TIME_OUT				0x78
+#define HV_STATUS_CALL_PENDING				0x79
+#define HV_STATUS_INSUFFICIENT_CONTIGUOUS_ROOT_MEMORY	0x83
+#define HV_STATUS_VTL_ALREADY_ENABLED			0x86
 
 /*
  * The Hyper-V TimeRefCount register and the TSC
@@ -474,6 +477,7 @@ union hv_vp_assist_msr_contents {	 /* HV_REGISTER_VP_ASSIST_PAGE */
 #define HVCALL_NOTIFY_PARTITION_EVENT                   0x0087
 #define HVCALL_ENTER_SLEEP_STATE			0x0084
 #define HVCALL_NOTIFY_PORT_RING_EMPTY			0x008b
+#define HVCALL_SCRUB_PARTITION				0x008d
 #define HVCALL_REGISTER_INTERCEPT_RESULT		0x0091
 #define HVCALL_ASSERT_VIRTUAL_INTERRUPT			0x0094
 #define HVCALL_CREATE_PORT				0x0095
diff --git a/include/hyperv/hvhdk.h b/include/hyperv/hvhdk.h
index 08965970c17d..245f3db53bf1 100644
--- a/include/hyperv/hvhdk.h
+++ b/include/hyperv/hvhdk.h
@@ -10,6 +10,13 @@
 #include "hvhdk_mini.h"
 #include "hvgdk.h"
 
+/*
+ * Hypervisor statistics page format
+ */
+struct hv_stats_page {
+	u64 data[HV_HYP_PAGE_SIZE / sizeof(u64)];
+} __packed;
+
 /* Bits for dirty mask of hv_vp_register_page */
 #define HV_X64_REGISTER_CLASS_GENERAL	0
 #define HV_X64_REGISTER_CLASS_IP	1
@@ -328,6 +335,8 @@ union hv_partition_isolation_properties {
 #define HV_PARTITION_ISOLATION_HOST_TYPE_RESERVED   0x2
 
 /* Note: Exo partition is enabled by default */
+#define HV_PARTITION_CREATION_FLAG_SMT_ENABLED_GUEST			BIT(0)
+#define HV_PARTITION_CREATION_FLAG_NESTED_VIRTUALIZATION_CAPABLE	BIT(1)
 #define HV_PARTITION_CREATION_FLAG_GPA_SUPER_PAGES_ENABLED		BIT(4)
 #define HV_PARTITION_CREATION_FLAG_EXO_PARTITION			BIT(8)
 #define HV_PARTITION_CREATION_FLAG_LAPIC_ENABLED			BIT(13)
diff --git a/include/hyperv/hvhdk_mini.h b/include/hyperv/hvhdk_mini.h
index 41a29bf8ec14..091c03e26046 100644
--- a/include/hyperv/hvhdk_mini.h
+++ b/include/hyperv/hvhdk_mini.h
@@ -7,6 +7,8 @@
 
 #include "hvgdk_mini.h"
 
+#define HV_MAX_CONTIGUOUS_ALLOCATION_PAGES	8
+
 /*
  * Doorbell connection_info flags.
  */
@@ -87,6 +89,9 @@ enum hv_partition_property_code {
 	HV_PARTITION_PROPERTY_PRIVILEGE_FLAGS			= 0x00010000,
 	HV_PARTITION_PROPERTY_SYNTHETIC_PROC_FEATURES		= 0x00010001,
 
+	/* Integrated scheduling properties */
+	HV_PARTITION_PROPERTY_INTEGRATED_SCHEDULER_ENABLED	= 0x00020005,
+
 	/* Resource properties */
 	HV_PARTITION_PROPERTY_GPA_PAGE_ACCESS_TRACKING		= 0x00050005,
 	HV_PARTITION_PROPERTY_UNIMPLEMENTED_MSR_ACTION		= 0x00050017,
@@ -102,7 +107,7 @@ enum hv_partition_property_code {
 };
 
 #define HV_PARTITION_VMM_CAPABILITIES_BANK_COUNT		1
-#define HV_PARTITION_VMM_CAPABILITIES_RESERVED_BITFIELD_COUNT	59
+#define HV_PARTITION_VMM_CAPABILITIES_RESERVED_BITFIELD_COUNT	57
 
 struct hv_partition_property_vmm_capabilities {
 	u16 bank_count;
@@ -119,6 +124,8 @@ struct hv_partition_property_vmm_capabilities {
 			u64 reservedbit3: 1;
 #endif
 			u64 assignable_synthetic_proc_features: 1;
+			u64 reservedbit5: 1;
+			u64 vmm_enable_integrated_scheduler : 1;
 			u64 reserved0: HV_PARTITION_VMM_CAPABILITIES_RESERVED_BITFIELD_COUNT;
 		} __packed;
 	};
diff --git a/include/uapi/linux/mshv.h b/include/uapi/linux/mshv.h
index dee3ece28ce5..e0645a34b55b 100644
--- a/include/uapi/linux/mshv.h
+++ b/include/uapi/linux/mshv.h
@@ -27,6 +27,8 @@ enum {
 	MSHV_PT_BIT_X2APIC,
 	MSHV_PT_BIT_GPA_SUPER_PAGES,
 	MSHV_PT_BIT_CPU_AND_XSAVE_FEATURES,
+	MSHV_PT_BIT_NESTED_VIRTUALIZATION,
+	MSHV_PT_BIT_SMT_ENABLED_GUEST,
 	MSHV_PT_BIT_COUNT,
 };