1 // SPDX-License-Identifier: GPL-2.0
27 	pr_info("Linux runs in Hyper-V Virtual Trust Level\n");  in hv_vtl_init_platform()
42 	x86_platform.legacy.i8042 = X86_LEGACY_I8042_PLATFORM_ABSENT;  in hv_vtl_init_platform()
43 	x86_platform.legacy.rtc = 0;  in hv_vtl_init_platform()
44 	x86_platform.legacy.warm_reset = 0;  in hv_vtl_init_platform()
45 	x86_platform.legacy.reserve_bios_regions = 0;  in hv_vtl_init_platform()
46 	x86_platform.legacy.devices.pnpbios = 0;  in hv_vtl_init_platform()
53 	return ((u64)desc->base3 << 32) | ((u64)desc->base2 << 24) |  in hv_vtl_system_desc_base()
54 		(desc->base1 << 16) | desc->base0;  in hv_vtl_system_desc_base()
59 	return ((u32)desc->limit1 << 16) | (u32)desc->limit0;  in hv_vtl_system_desc_limit()
83 	u64 rsp = (unsigned long)idle->thread.sp;  in hv_vtl_bringup_vcpu()
99 	input->partition_id = HV_PARTITION_ID_SELF;  in hv_vtl_bringup_vcpu()
100 	input->vp_index = target_vp_index;  in hv_vtl_bringup_vcpu()
101 	input->target_vtl.target_vtl = HV_VTL_MGMT;  in hv_vtl_bringup_vcpu()
104 	 * The x86_64 Linux kernel follows the 16-bit -> 32-bit -> 64-bit  in hv_vtl_bringup_vcpu()
105 	 * mode transition sequence after waking up an AP with SIPI whose  in hv_vtl_bringup_vcpu()
106 	 * vector points to the 16-bit AP startup trampoline code. Here in  in hv_vtl_bringup_vcpu()
107 	 * VTL2, we can't perform that sequence as the AP has to start in  in hv_vtl_bringup_vcpu()
108 	 * the 64-bit mode.  in hv_vtl_bringup_vcpu()
110 	 * To make this happen, we tell the hypervisor to load a valid 64-bit  in hv_vtl_bringup_vcpu()
112 	 * so that AP jumps right to the 64-bit entry of the kernel, and the  in hv_vtl_bringup_vcpu()
117 	input->vp_context.rip = rip;  in hv_vtl_bringup_vcpu()
118 	input->vp_context.rsp = rsp;  in hv_vtl_bringup_vcpu()
119 	input->vp_context.rflags = 0x0000000000000002;  in hv_vtl_bringup_vcpu()
120 	input->vp_context.efer = __rdmsr(MSR_EFER);  in hv_vtl_bringup_vcpu()
121 	input->vp_context.cr0 = native_read_cr0();  in hv_vtl_bringup_vcpu()
122 	input->vp_context.cr3 = __native_read_cr3();  in hv_vtl_bringup_vcpu()
123 	input->vp_context.cr4 = native_read_cr4();  in hv_vtl_bringup_vcpu()
124 	input->vp_context.msr_cr_pat = __rdmsr(MSR_IA32_CR_PAT);  in hv_vtl_bringup_vcpu()
125 	input->vp_context.idtr.limit = idt_ptr.size;  in hv_vtl_bringup_vcpu()
126 	input->vp_context.idtr.base = idt_ptr.address;  in hv_vtl_bringup_vcpu()
127 	input->vp_context.gdtr.limit = gdt_ptr.size;  in hv_vtl_bringup_vcpu()
128 	input->vp_context.gdtr.base = gdt_ptr.address;  in hv_vtl_bringup_vcpu()
130 	/* Non-system desc (64bit), long, code, present */  in hv_vtl_bringup_vcpu()
131 	input->vp_context.cs.selector = __KERNEL_CS;  in hv_vtl_bringup_vcpu()
132 	input->vp_context.cs.base = 0;  in hv_vtl_bringup_vcpu()
133 	input->vp_context.cs.limit = 0xffffffff;  in hv_vtl_bringup_vcpu()
134 	input->vp_context.cs.attributes = 0xa09b;  in hv_vtl_bringup_vcpu()
135 	/* Non-system desc (64bit), data, present, granularity, default */  in hv_vtl_bringup_vcpu()
136 	input->vp_context.ss.selector = __KERNEL_DS;  in hv_vtl_bringup_vcpu()
137 	input->vp_context.ss.base = 0;  in hv_vtl_bringup_vcpu()
138 	input->vp_context.ss.limit = 0xffffffff;  in hv_vtl_bringup_vcpu()
139 	input->vp_context.ss.attributes = 0xc093;  in hv_vtl_bringup_vcpu()
142 	input->vp_context.ldtr.selector = GDT_ENTRY_LDT * 8;  in hv_vtl_bringup_vcpu()
143 	input->vp_context.ldtr.base = hv_vtl_system_desc_base(ldt);  in hv_vtl_bringup_vcpu()
144 	input->vp_context.ldtr.limit = hv_vtl_system_desc_limit(ldt);  in hv_vtl_bringup_vcpu()
145 	input->vp_context.ldtr.attributes = 0x82;  in hv_vtl_bringup_vcpu()
147 	/* System desc (128bit), present, TSS, 0x8b - busy, 0x89 -- default */  in hv_vtl_bringup_vcpu()
148 	input->vp_context.tr.selector = GDT_ENTRY_TSS * 8;  in hv_vtl_bringup_vcpu()
149 	input->vp_context.tr.base = hv_vtl_system_desc_base(tss);  in hv_vtl_bringup_vcpu()
150 	input->vp_context.tr.limit = hv_vtl_system_desc_limit(tss);  in hv_vtl_bringup_vcpu()
151 	input->vp_context.tr.attributes = 0x8b;  in hv_vtl_bringup_vcpu()
159 		ret = -EINVAL;  in hv_vtl_bringup_vcpu()
168 		ret = -EINVAL;  in hv_vtl_bringup_vcpu()
189 	input->partition_id = HV_PARTITION_ID_SELF;  in hv_vtl_apicid_to_vp_id()
190 	input->apic_ids[0] = apic_id;  in hv_vtl_apicid_to_vp_id()
203 		return -EINVAL;  in hv_vtl_apicid_to_vp_id()
219 		return -EINVAL;  in hv_vtl_wakeup_secondary_cpu()
226 		return -EINVAL;  in hv_vtl_wakeup_secondary_cpu()
230 		return -EINVAL;  in hv_vtl_wakeup_secondary_cpu()
243 		panic("XSAVE has to be disabled as it is not supported by this module.\n"  in hv_vtl_early_init()