[PATCH 17/19] drivers/hv: get and set partition property ioctls

From: Nuno Das Neves
Date: Fri May 28 2021 - 18:44:42 EST

Next message: Nuno Das Neves: "[PATCH 19/19] drivers/hv: Translate GVA to GPA"
Previous message: Nuno Das Neves: "[PATCH 18/19] drivers/hv: Add enlightenment bits to create partition ioctl"
In reply to: Nuno Das Neves: "[PATCH 18/19] drivers/hv: Add enlightenment bits to create partition ioctl"
Next in thread: Nuno Das Neves: "[PATCH 19/19] drivers/hv: Translate GVA to GPA"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]

Introduce ioctls for getting and setting properties of guest partitions.

Signed-off-by: Nuno Das Neves <nunodasneves@xxxxxxxxxxxxxxxxxxx>
---
Documentation/virt/mshv/api.rst | 8 ++++
drivers/hv/hv_call.c | 58 +++++++++++++++++++++++++
drivers/hv/mshv.h | 8 ++++
drivers/hv/mshv_main.c | 47 ++++++++++++++++++++
include/asm-generic/hyperv-tlfs.h | 19 +++++++++
include/uapi/asm-generic/hyperv-tlfs.h | 59 ++++++++++++++++++++++++++
include/uapi/linux/mshv.h | 9 ++++
7 files changed, 208 insertions(+)

diff --git a/Documentation/virt/mshv/api.rst b/Documentation/virt/mshv/api.rst
index bf3c060bd418..e660e0e6865e 100644
--- a/Documentation/virt/mshv/api.rst
+++ b/Documentation/virt/mshv/api.rst
@@ -159,4 +159,12 @@ Maps a page into userspace that can be used to get and set common registers
while the vp is suspended.
The page is laid out in struct hv_vp_register_page in asm/hyperv-tlfs.h.

+3.11 MSHV_SET_PARTITION_PROPERTY and MSHV_GET_PARTITION_PROPERTY
+----------------------------------------------------------------
+:Type: partition ioctl
+:Parameters: struct mshv_partition_property
+:Returns: 0 on success
+
+Can be used to get/set various properties of a partition.
+

diff --git a/drivers/hv/hv_call.c b/drivers/hv/hv_call.c
index a2ae0a31706b..67167fa93851 100644
--- a/drivers/hv/hv_call.c
+++ b/drivers/hv/hv_call.c
@@ -640,3 +640,61 @@ int hv_call_map_vp_state_page(

return ret;
}
+
+int hv_call_get_partition_property(
+ u64 partition_id,
+ u64 property_code,
+ u64 *property_value)
+{
+ u64 status;
+ unsigned long flags;
+ struct hv_get_partition_property_in *input;
+ struct hv_get_partition_property_out *output;
+
+ local_irq_save(flags);
+ input = (struct hv_get_partition_property_in *)(*this_cpu_ptr(
+ hyperv_pcpu_input_arg));
+ output = (struct hv_get_partition_property_out *)(*this_cpu_ptr(
+ hyperv_pcpu_output_arg));
+ memset(input, 0, sizeof(*input));
+ input->partition_id = partition_id;
+ input->property_code = property_code;
+ status = hv_do_hypercall(HVCALL_GET_PARTITION_PROPERTY, input,
+ output);
+
+ if (!hv_result_success(status)) {
+ pr_err("%s: %s\n", __func__, hv_status_to_string(status));
+ local_irq_restore(flags);
+ return hv_status_to_errno(status);
+ }
+ *property_value = output->property_value;
+
+ local_irq_restore(flags);
+
+ return 0;
+}
+
+int hv_call_set_partition_property(
+ u64 partition_id,
+ u64 property_code,
+ u64 property_value)
+{
+ u64 status;
+ unsigned long flags;
+ struct hv_set_partition_property *input;
+
+ local_irq_save(flags);
+ input = (struct hv_set_partition_property *)(*this_cpu_ptr(
+ hyperv_pcpu_input_arg));
+ memset(input, 0, sizeof(*input));
+ input->partition_id = partition_id;
+ input->property_code = property_code;
+ input->property_value = property_value;
+ status = hv_do_hypercall(HVCALL_SET_PARTITION_PROPERTY, input, NULL);
+ local_irq_restore(flags);
+
+ if (!hv_result_success(status))
+ pr_err("%s: %s\n", __func__, hv_status_to_string(status));
+
+ return hv_status_to_errno(status);
+}
diff --git a/drivers/hv/mshv.h b/drivers/hv/mshv.h
index a9215581be6b..8230368b4257 100644
--- a/drivers/hv/mshv.h
+++ b/drivers/hv/mshv.h
@@ -101,5 +101,13 @@ int hv_call_map_vp_state_page(
u32 vp_index,
u64 partition_id,
struct page **state_page);
+int hv_call_get_partition_property(
+ u64 partition_id,
+ u64 property_code,
+ u64 *property_value);
+int hv_call_set_partition_property(
+ u64 partition_id,
+ u64 property_code,
+ u64 property_value);

#endif /* _MSHV_H */
diff --git a/drivers/hv/mshv_main.c b/drivers/hv/mshv_main.c
index bc1df1f6e737..9be684d56da6 100644
--- a/drivers/hv/mshv_main.c
+++ b/drivers/hv/mshv_main.c
@@ -565,6 +565,45 @@ mshv_partition_ioctl_create_vp(struct mshv_partition *partition,
return ret;
}

+static long
+mshv_partition_ioctl_get_property(struct mshv_partition *partition,
+ void __user *user_args)
+{
+ struct mshv_partition_property args;
+ long ret;
+
+ if (copy_from_user(&args, user_args, sizeof(args)))
+ return -EFAULT;
+
+ ret = hv_call_get_partition_property(
+ partition->id,
+ args.property_code,
+ &args.property_value);
+
+ if (ret)
+ return ret;
+
+ if (copy_to_user(user_args, &args, sizeof(args)))
+ return -EFAULT;
+
+ return 0;
+}
+
+static long
+mshv_partition_ioctl_set_property(struct mshv_partition *partition,
+ void __user *user_args)
+{
+ struct mshv_partition_property args;
+
+ if (copy_from_user(&args, user_args, sizeof(args)))
+ return -EFAULT;
+
+ return hv_call_set_partition_property(
+ partition->id,
+ args.property_code,
+ args.property_value);
+}
+
static long
mshv_partition_ioctl_map_memory(struct mshv_partition *partition,
struct mshv_user_mem_region __user *user_mem)
@@ -784,6 +823,14 @@ mshv_partition_ioctl(struct file *filp, unsigned int ioctl, unsigned long arg)
ret = mshv_partition_ioctl_assert_interrupt(partition,
(void __user *)arg);
break;
+ case MSHV_GET_PARTITION_PROPERTY:
+ ret = mshv_partition_ioctl_get_property(partition,
+ (void __user *)arg);
+ break;
+ case MSHV_SET_PARTITION_PROPERTY:
+ ret = mshv_partition_ioctl_set_property(partition,
+ (void __user *)arg);
+ break;
default:
ret = -ENOTTY;
}
diff --git a/include/asm-generic/hyperv-tlfs.h b/include/asm-generic/hyperv-tlfs.h
index 8d4750d19c9d..2869d0300032 100644
--- a/include/asm-generic/hyperv-tlfs.h
+++ b/include/asm-generic/hyperv-tlfs.h
@@ -147,6 +147,8 @@ struct ms_hyperv_tsc_page {
#define HVCALL_INITIALIZE_PARTITION 0x0041
#define HVCALL_FINALIZE_PARTITION 0x0042
#define HVCALL_DELETE_PARTITION 0x0043
+#define HVCALL_GET_PARTITION_PROPERTY 0x0044
+#define HVCALL_SET_PARTITION_PROPERTY 0x0045
#define HVCALL_GET_PARTITION_ID 0x0046
#define HVCALL_DEPOSIT_MEMORY 0x0048
#define HVCALL_WITHDRAW_MEMORY 0x0049
@@ -882,4 +884,21 @@ struct hv_map_vp_state_page_out {
u64 map_location; /* page number */
} __packed;

+struct hv_get_partition_property_in {
+ u64 partition_id;
+ u32 property_code; /* enum hv_partition_property_code */
+ u32 padding;
+} __packed;
+
+struct hv_get_partition_property_out {
+ u64 property_value;
+} __packed;
+
+struct hv_set_partition_property {
+ u64 partition_id;
+ u32 property_code; /* enum hv_partition_property_code */
+ u32 padding;
+ u64 property_value;
+} __packed;
+
#endif
diff --git a/include/uapi/asm-generic/hyperv-tlfs.h b/include/uapi/asm-generic/hyperv-tlfs.h
index a1bc77e463dd..1e572d38234a 100644
--- a/include/uapi/asm-generic/hyperv-tlfs.h
+++ b/include/uapi/asm-generic/hyperv-tlfs.h
@@ -136,4 +136,63 @@ enum hv_vp_state_page_type {
HV_VP_STATE_PAGE_COUNT
};

+enum hv_partition_property_code {
+ /* Privilege properties */
+ HV_PARTITION_PROPERTY_PRIVILEGE_FLAGS = 0x00010000,
+
+ /* Scheduling properties */
+ HV_PARTITION_PROPERTY_SUSPEND = 0x00020000,
+ HV_PARTITION_PROPERTY_CPU_RESERVE = 0x00020001,
+ HV_PARTITION_PROPERTY_CPU_CAP = 0x00020002,
+ HV_PARTITION_PROPERTY_CPU_WEIGHT = 0x00020003,
+ HV_PARTITION_PROPERTY_CPU_GROUP_ID = 0x00020004,
+
+ /* Time properties */
+ HV_PARTITION_PROPERTY_TIME_FREEZE = 0x00030003,
+
+ /* Debugging properties */
+ HV_PARTITION_PROPERTY_DEBUG_CHANNEL_ID = 0x00040000,
+
+ /* Resource properties */
+ HV_PARTITION_PROPERTY_VIRTUAL_TLB_PAGE_COUNT = 0x00050000,
+ HV_PARTITION_PROPERTY_VSM_CONFIG = 0x00050001,
+ HV_PARTITION_PROPERTY_ZERO_MEMORY_ON_RESET = 0x00050002,
+ HV_PARTITION_PROPERTY_PROCESSORS_PER_SOCKET = 0x00050003,
+ HV_PARTITION_PROPERTY_NESTED_TLB_SIZE = 0x00050004,
+ HV_PARTITION_PROPERTY_GPA_PAGE_ACCESS_TRACKING = 0x00050005,
+ HV_PARTITION_PROPERTY_VSM_PERMISSIONS_DIRTY_SINCE_LAST_QUERY = 0x00050006,
+ HV_PARTITION_PROPERTY_SGX_LAUNCH_CONTROL_CONFIG = 0x00050007,
+ HV_PARTITION_PROPERTY_DEFAULT_SGX_LAUNCH_CONTROL0 = 0x00050008,
+ HV_PARTITION_PROPERTY_DEFAULT_SGX_LAUNCH_CONTROL1 = 0x00050009,
+ HV_PARTITION_PROPERTY_DEFAULT_SGX_LAUNCH_CONTROL2 = 0x0005000a,
+ HV_PARTITION_PROPERTY_DEFAULT_SGX_LAUNCH_CONTROL3 = 0x0005000b,
+ HV_PARTITION_PROPERTY_ISOLATION_STATE = 0x0005000c,
+ HV_PARTITION_PROPERTY_ISOLATION_CONTROL = 0x0005000d,
+ HV_PARTITION_PROPERTY_RDT_L3_COS_INDEX = 0x0005000e,
+ HV_PARTITION_PROPERTY_RDT_RMID = 0x0005000f,
+ HV_PARTITION_PROPERTY_IMPLEMENTED_PHYSICAL_ADDRESS_BITS = 0x00050010,
+ HV_PARTITION_PROPERTY_NON_ARCHITECTURAL_CORE_SHARING = 0x00050011,
+ HV_PARTITION_PROPERTY_HYPERCALL_DOORBELL_PAGE = 0x00050012,
+
+ /* Compatibility properties */
+ HV_PARTITION_PROPERTY_PROCESSOR_VENDOR = 0x00060000,
+ HV_PARTITION_PROPERTY_PROCESSOR_FEATURES_DEPRECATED = 0x00060001,
+ HV_PARTITION_PROPERTY_PROCESSOR_XSAVE_FEATURES = 0x00060002,
+ HV_PARTITION_PROPERTY_PROCESSOR_CL_FLUSH_SIZE = 0x00060003,
+ HV_PARTITION_PROPERTY_ENLIGHTENMENT_MODIFICATIONS = 0x00060004,
+ HV_PARTITION_PROPERTY_COMPATIBILITY_VERSION = 0x00060005,
+ HV_PARTITION_PROPERTY_PHYSICAL_ADDRESS_WIDTH = 0x00060006,
+ HV_PARTITION_PROPERTY_XSAVE_STATES = 0x00060007,
+ HV_PARTITION_PROPERTY_MAX_XSAVE_DATA_SIZE = 0x00060008,
+ HV_PARTITION_PROPERTY_PROCESSOR_CLOCK_FREQUENCY = 0x00060009,
+ HV_PARTITION_PROPERTY_PROCESSOR_FEATURES0 = 0x0006000a,
+ HV_PARTITION_PROPERTY_PROCESSOR_FEATURES1 = 0x0006000b,
+
+ /* Guest software properties */
+ HV_PARTITION_PROPERTY_GUEST_OS_ID = 0x00070000,
+
+ /* Nested virtualization properties */
+ HV_PARTITION_PROPERTY_PROCESSOR_VIRTUALIZATION_FEATURES = 0x00080000,
+};
+
#endif
diff --git a/include/uapi/linux/mshv.h b/include/uapi/linux/mshv.h
index 718a3617e1f1..1a6c22db4978 100644
--- a/include/uapi/linux/mshv.h
+++ b/include/uapi/linux/mshv.h
@@ -66,6 +66,11 @@ struct mshv_vp_state {
} buf;
};

+struct mshv_partition_property {
+ enum hv_partition_property_code property_code;
+ __u64 property_value;
+};
+
#define MSHV_IOCTL 0xB8

/* mshv device */
@@ -78,6 +83,10 @@ struct mshv_vp_state {
#define MSHV_CREATE_VP _IOW(MSHV_IOCTL, 0x04, struct mshv_create_vp)
#define MSHV_INSTALL_INTERCEPT _IOW(MSHV_IOCTL, 0x08, struct mshv_install_intercept)
#define MSHV_ASSERT_INTERRUPT _IOW(MSHV_IOCTL, 0x09, struct mshv_assert_interrupt)
+#define MSHV_SET_PARTITION_PROPERTY \
+ _IOW(MSHV_IOCTL, 0xC, struct mshv_partition_property)
+#define MSHV_GET_PARTITION_PROPERTY \
+ _IOWR(MSHV_IOCTL, 0xD, struct mshv_partition_property)

/* vp device */
#define MSHV_GET_VP_REGISTERS _IOWR(MSHV_IOCTL, 0x05, struct mshv_vp_registers)
--
2.25.1

Next message: Nuno Das Neves: "[PATCH 19/19] drivers/hv: Translate GVA to GPA"
Previous message: Nuno Das Neves: "[PATCH 18/19] drivers/hv: Add enlightenment bits to create partition ioctl"
In reply to: Nuno Das Neves: "[PATCH 18/19] drivers/hv: Add enlightenment bits to create partition ioctl"
Next in thread: Nuno Das Neves: "[PATCH 19/19] drivers/hv: Translate GVA to GPA"
Messages sorted by: [ date ] [ thread ] [ subject ] [ author ]