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Date: Tue, 28 Sep 2021 11:31:14 -0700
From: Nuno Das Neves <nunodasneves@...ux.microsoft.com>
To: linux-hyperv@...r.kernel.org, linux-kernel@...r.kernel.org
Cc: virtualization@...ts.linux-foundation.org, mikelley@...rosoft.com,
viremana@...ux.microsoft.com, sunilmut@...rosoft.com,
wei.liu@...nel.org, vkuznets@...hat.com, ligrassi@...rosoft.com,
kys@...rosoft.com, sthemmin@...rosoft.com,
anbelski@...ux.microsoft.com
Subject: [PATCH v3 18/19] drivers/hv: Add enlightenment bits to create partition ioctl
Introduce hv_partition_synthetic_processor features mask to
MSHV_CREATE_PARTITION ioctl, which can be used to enable hypervisor
enlightenments for exo partitions.
Signed-off-by: Nuno Das Neves <nunodasneves@...ux.microsoft.com>
---
Documentation/virt/mshv/api.rst | 3 +
arch/x86/include/uapi/asm/hyperv-tlfs.h | 125 ++++++++++++++++++++++++
drivers/hv/mshv_main.c | 7 ++
include/uapi/asm-generic/hyperv-tlfs.h | 1 +
include/uapi/linux/mshv.h | 1 +
5 files changed, 137 insertions(+)
diff --git a/Documentation/virt/mshv/api.rst b/Documentation/virt/mshv/api.rst
index e660e0e6865e..56a6edfcfe29 100644
--- a/Documentation/virt/mshv/api.rst
+++ b/Documentation/virt/mshv/api.rst
@@ -167,4 +167,7 @@ The page is laid out in struct hv_vp_register_page in asm/hyperv-tlfs.h.
Can be used to get/set various properties of a partition.
+Some properties can only be set at partition creation. For these, there are
+parameters in MSHV_CREATE_PARTITION.
+
diff --git a/arch/x86/include/uapi/asm/hyperv-tlfs.h b/arch/x86/include/uapi/asm/hyperv-tlfs.h
index 5430f3c98934..4447ef5362e9 100644
--- a/arch/x86/include/uapi/asm/hyperv-tlfs.h
+++ b/arch/x86/include/uapi/asm/hyperv-tlfs.h
@@ -1146,4 +1146,129 @@ struct hv_vp_register_page {
__u64 instruction_emulation_hints;
} __packed;
+#define HV_PARTITION_SYNTHETIC_PROCESSOR_FEATURES_BANKS 1
+
+union hv_partition_synthetic_processor_features {
+ __u64 as_uint64[HV_PARTITION_SYNTHETIC_PROCESSOR_FEATURES_BANKS];
+
+ struct {
+ /* Report a hypervisor is present. CPUID leaves
+ * 0x40000000 and 0x40000001 are supported.
+ */
+ __u64 hypervisor_present:1;
+
+ /*
+ * Features associated with HV#1:
+ */
+
+ /* Report support for Hv1 (CPUID leaves 0x40000000 - 0x40000006). */
+ __u64 hv1:1;
+
+ /* Access to HV_X64_MSR_VP_RUNTIME.
+ * Corresponds to access_vp_run_time_reg privilege.
+ */
+ __u64 access_vp_run_time_reg:1;
+
+ /* Access to HV_X64_MSR_TIME_REF_COUNT.
+ * Corresponds to access_partition_reference_counter privilege.
+ */
+ __u64 access_partition_reference_counter:1;
+
+ /* Access to SINT-related registers (HV_X64_MSR_SCONTROL through
+ * HV_X64_MSR_EOM and HV_X64_MSR_SINT0 through HV_X64_MSR_SINT15).
+ * Corresponds to access_synic_regs privilege.
+ */
+ __u64 access_synic_regs:1;
+
+ /* Access to synthetic timers and associated MSRs
+ * (HV_X64_MSR_STIMER0_CONFIG through HV_X64_MSR_STIMER3_COUNT).
+ * Corresponds to access_synthetic_timer_regs privilege.
+ */
+ __u64 access_synthetic_timer_regs:1;
+
+ /* Access to APIC MSRs (HV_X64_MSR_EOI, HV_X64_MSR_ICR and HV_X64_MSR_TPR)
+ * as well as the VP assist page.
+ * Corresponds to access_intr_ctrl_regs privilege.
+ */
+ __u64 access_intr_ctrl_regs:1;
+
+ /* Access to registers associated with hypercalls (HV_X64_MSR_GUEST_OS_ID
+ * and HV_X64_MSR_HYPERCALL).
+ * Corresponds to access_hypercall_msrs privilege.
+ */
+ __u64 access_hypercall_regs:1;
+
+ /* VP index can be queried. corresponds to access_vp_index privilege. */
+ __u64 access_vp_index:1;
+
+ /* Access to the reference TSC. Corresponds to access_partition_reference_tsc
+ * privilege.
+ */
+ __u64 access_partition_reference_tsc:1;
+
+ /* Partition has access to the guest idle reg. Corresponds to
+ * access_guest_idle_reg privilege.
+ */
+ __u64 access_guest_idle_reg:1;
+
+ /* Partition has access to frequency regs. corresponds to access_frequency_regs
+ * privilege.
+ */
+ __u64 access_frequency_regs:1;
+
+ __u64 reserved_z12:1; /* Reserved for access_reenlightenment_controls. */
+ __u64 reserved_z13:1; /* Reserved for access_root_scheduler_reg. */
+ __u64 reserved_z14:1; /* Reserved for access_tsc_invariant_controls. */
+
+ /* Extended GVA ranges for HvCallFlushVirtualAddressList hypercall.
+ * Corresponds to privilege.
+ */
+ __u64 enable_extended_gva_ranges_for_flush_virtual_address_list:1;
+
+ __u64 reserved_z16:1; /* Reserved for access_vsm. */
+ __u64 reserved_z17:1; /* Reserved for access_vp_registers. */
+
+ /* Use fast hypercall output. Corresponds to privilege. */
+ __u64 fast_hypercall_output:1;
+
+ __u64 reserved_z19:1; /* Reserved for enable_extended_hypercalls. */
+
+ /*
+ * HvStartVirtualProcessor can be used to start virtual processors.
+ * Corresponds to privilege.
+ */
+ __u64 start_virtual_processor:1;
+
+ __u64 reserved_z21:1; /* Reserved for Isolation. */
+
+ /* Synthetic timers in direct mode. */
+ __u64 direct_synthetic_timers:1;
+
+ __u64 reserved_z23:1; /* Reserved for synthetic time unhalted timer */
+
+ /* Use extended processor masks. */
+ __u64 extended_processor_masks:1;
+
+ /* HvCallFlushVirtualAddressSpace / HvCallFlushVirtualAddressList are supported. */
+ __u64 tb_flush_hypercalls:1;
+
+ /* HvCallSendSyntheticClusterIpi is supported. */
+ __u64 synthetic_cluster_ipi:1;
+
+ /* HvCallNotifyLongSpinWait is supported. */
+ __u64 notify_long_spin_wait:1;
+
+ /* HvCallQueryNumaDistance is supported. */
+ __u64 query_numa_distance:1;
+
+ /* HvCallSignalEvent is supported. Corresponds to privilege. */
+ __u64 signal_events:1;
+
+ /* HvCallRetargetDeviceInterrupt is supported. */
+ __u64 retarget_device_interrupt:1;
+
+ __u64 reserved:33;
+ } __packed;
+};
+
#endif
diff --git a/drivers/hv/mshv_main.c b/drivers/hv/mshv_main.c
index d65bcd8567a4..766ba7d5d168 100644
--- a/drivers/hv/mshv_main.c
+++ b/drivers/hv/mshv_main.c
@@ -1000,6 +1000,13 @@ mshv_ioctl_create_partition(void __user *user_arg)
if (ret)
goto put_fd;
+ ret = hv_call_set_partition_property(
+ partition->id,
+ HV_PARTITION_PROPERTY_SYNTHETIC_PROC_FEATURES,
+ args.synthetic_processor_features.as_uint64[0]);
+ if (ret)
+ goto delete_partition;
+
ret = hv_call_initialize_partition(partition->id);
if (ret)
goto delete_partition;
diff --git a/include/uapi/asm-generic/hyperv-tlfs.h b/include/uapi/asm-generic/hyperv-tlfs.h
index 1e572d38234a..5d8d5e89f432 100644
--- a/include/uapi/asm-generic/hyperv-tlfs.h
+++ b/include/uapi/asm-generic/hyperv-tlfs.h
@@ -139,6 +139,7 @@ enum hv_vp_state_page_type {
enum hv_partition_property_code {
/* Privilege properties */
HV_PARTITION_PROPERTY_PRIVILEGE_FLAGS = 0x00010000,
+ HV_PARTITION_PROPERTY_SYNTHETIC_PROC_FEATURES = 0x00010001,
/* Scheduling properties */
HV_PARTITION_PROPERTY_SUSPEND = 0x00020000,
diff --git a/include/uapi/linux/mshv.h b/include/uapi/linux/mshv.h
index 1a6c22db4978..ec8281712430 100644
--- a/include/uapi/linux/mshv.h
+++ b/include/uapi/linux/mshv.h
@@ -19,6 +19,7 @@
struct mshv_create_partition {
__u64 flags;
struct hv_partition_creation_properties partition_creation_properties;
+ union hv_partition_synthetic_processor_features synthetic_processor_features;
};
/*
--
2.23.4
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