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hypervisor: kvm: Import TDX vmcall structure

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Consistent with the other data structures and constants used in TDX
support code import the necessary structures from the kernel for
accessing the vmcall structure.

Signed-off-by: Rob Bradford <rbradford@rivosinc.com>
This commit is contained in:
Rob Bradford 2024-01-24 11:07:58 +00:00 committed by Bo Chen
parent 2c9cf8d8af
commit 3993663e5c
1 changed files with 60 additions and 4 deletions
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64
hypervisor/src/kvm/mod.rs
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@ -71,8 +71,6 @@ pub use x86_64::{CpuId, ExtendedControlRegisters, MsrEntries, VcpuKvmState, Xsav
#[cfg(target_arch = "aarch64")]
pub mod aarch64;
pub use kvm_bindings;
#[cfg(feature = "tdx")]
use kvm_bindings::KVMIO;
pub use kvm_bindings::{
kvm_clock_data, kvm_create_device, kvm_device_type_KVM_DEV_TYPE_VFIO, kvm_guest_debug,
kvm_irq_routing, kvm_irq_routing_entry, kvm_mp_state, kvm_userspace_memory_region,
@ -86,6 +84,8 @@ use kvm_bindings::{
KVM_REG_ARM64_SYSREG_OP0_MASK, KVM_REG_ARM64_SYSREG_OP1_MASK, KVM_REG_ARM64_SYSREG_OP2_MASK,
KVM_REG_ARM_CORE, KVM_REG_SIZE_U128, KVM_REG_SIZE_U32, KVM_REG_SIZE_U64,
};
#[cfg(feature = "tdx")]
use kvm_bindings::{kvm_run__bindgen_ty_1, KVMIO};
pub use kvm_ioctls;
pub use kvm_ioctls::{Cap, Kvm};
#[cfg(target_arch = "aarch64")]
@ -169,6 +169,52 @@ pub struct TdxCapabilities {
pub cpuid_configs: [TdxCpuidConfig; TDX_MAX_NR_CPUID_CONFIGS],
}
#[cfg(feature = "tdx")]
#[derive(Copy, Clone)]
pub struct KvmTdxExit {
pub type_: u32,
pub pad: u32,
pub u: KvmTdxExitU,
}
#[cfg(feature = "tdx")]
#[repr(C)]
#[derive(Copy, Clone)]
pub union KvmTdxExitU {
pub vmcall: KvmTdxExitVmcall,
}
#[cfg(feature = "tdx")]
#[repr(C)]
#[derive(Debug, Default, Copy, Clone, PartialEq)]
pub struct KvmTdxExitVmcall {
pub type_: u64,
pub subfunction: u64,
pub reg_mask: u64,
pub in_r12: u64,
pub in_r13: u64,
pub in_r14: u64,
pub in_r15: u64,
pub in_rbx: u64,
pub in_rdi: u64,
pub in_rsi: u64,
pub in_r8: u64,
pub in_r9: u64,
pub in_rdx: u64,
pub status_code: u64,
pub out_r11: u64,
pub out_r12: u64,
pub out_r13: u64,
pub out_r14: u64,
pub out_r15: u64,
pub out_rbx: u64,
pub out_rdi: u64,
pub out_rsi: u64,
pub out_r8: u64,
pub out_r9: u64,
pub out_rdx: u64,
}
impl From<kvm_userspace_memory_region> for UserMemoryRegion {
fn from(region: kvm_userspace_memory_region) -> Self {
let mut flags = USER_MEMORY_REGION_READ;
@ -2139,7 +2185,12 @@ impl cpu::Vcpu for KvmVcpu {
fn get_tdx_exit_details(&mut self) -> cpu::Result<TdxExitDetails> {
let kvm_run = self.fd.get_kvm_run();
// SAFETY: accessing a union field in a valid structure
let tdx_vmcall = unsafe { &mut kvm_run.__bindgen_anon_1.tdx.u.vmcall };
let tdx_vmcall = unsafe {
&mut (*((&mut kvm_run.__bindgen_anon_1) as *mut kvm_run__bindgen_ty_1
as *mut KvmTdxExit))
.u
.vmcall
};
tdx_vmcall.status_code = TDG_VP_VMCALL_INVALID_OPERAND;
@ -2163,7 +2214,12 @@ impl cpu::Vcpu for KvmVcpu {
fn set_tdx_status(&mut self, status: TdxExitStatus) {
let kvm_run = self.fd.get_kvm_run();
// SAFETY: accessing a union field in a valid structure
let tdx_vmcall = unsafe { &mut kvm_run.__bindgen_anon_1.tdx.u.vmcall };
let tdx_vmcall = unsafe {
&mut (*((&mut kvm_run.__bindgen_anon_1) as *mut kvm_run__bindgen_ty_1
as *mut KvmTdxExit))
.u
.vmcall
};
tdx_vmcall.status_code = match status {
TdxExitStatus::Success => TDG_VP_VMCALL_SUCCESS,