mshv-ioctls: update get_regs to use register page

Signed-off-by: Muminul Islam <[email protected]>

Author: russell-islam

mshv-bindings/src/x86_64/regs.rs

@@ -787,6 +787,18 @@ macro_rules! set_gp_regs_field_ptr {
     };
 }
 
+#[macro_export]
+macro_rules! get_gp_regs_field_ptr {
+    ($this: ident, $name: ident) => {
+        (*$this)
+            .__bindgen_anon_1
+            .__bindgen_anon_1
+            .__bindgen_anon_1
+            .__bindgen_anon_1
+            .$name
+    };
+}
+
 #[cfg(test)]
 mod tests {
     use super::*;

mshv-ioctls/src/ioctls/vcpu.rs

@@ -199,59 +199,33 @@ impl VcpuFd {
     /// Returns the vCPU general purpose registers.
     #[cfg(not(target_arch = "aarch64"))]
     pub fn get_regs(&self) -> Result<StandardRegisters> {
-        let reg_names = [
-            hv_register_name_HV_X64_REGISTER_RAX,
-            hv_register_name_HV_X64_REGISTER_RBX,
-            hv_register_name_HV_X64_REGISTER_RCX,
-            hv_register_name_HV_X64_REGISTER_RDX,
-            hv_register_name_HV_X64_REGISTER_RSI,
-            hv_register_name_HV_X64_REGISTER_RDI,
-            hv_register_name_HV_X64_REGISTER_RSP,
-            hv_register_name_HV_X64_REGISTER_RBP,
-            hv_register_name_HV_X64_REGISTER_R8,
-            hv_register_name_HV_X64_REGISTER_R9,
-            hv_register_name_HV_X64_REGISTER_R10,
-            hv_register_name_HV_X64_REGISTER_R11,
-            hv_register_name_HV_X64_REGISTER_R12,
-            hv_register_name_HV_X64_REGISTER_R13,
-            hv_register_name_HV_X64_REGISTER_R14,
-            hv_register_name_HV_X64_REGISTER_R15,
-            hv_register_name_HV_X64_REGISTER_RIP,
-            hv_register_name_HV_X64_REGISTER_RFLAGS,
-        ];
-        let mut reg_assocs: Vec<hv_register_assoc> = reg_names
-            .iter()
-            .map(|name| hv_register_assoc {
-                name: *name,
-                ..Default::default()
-            })
-            .collect();
-        self.get_reg(&mut reg_assocs)?;
+        let vp_reg_page = self.get_vp_reg_page();
         let mut ret_regs = StandardRegisters::default();
         // SAFETY: access union fields
         unsafe {
-            ret_regs.rax = reg_assocs[0].value.reg64;
-            ret_regs.rbx = reg_assocs[1].value.reg64;
-            ret_regs.rcx = reg_assocs[2].value.reg64;
-            ret_regs.rdx = reg_assocs[3].value.reg64;
-            ret_regs.rsi = reg_assocs[4].value.reg64;
-            ret_regs.rdi = reg_assocs[5].value.reg64;
-            ret_regs.rsp = reg_assocs[6].value.reg64;
-            ret_regs.rbp = reg_assocs[7].value.reg64;
-            ret_regs.r8 = reg_assocs[8].value.reg64;
-            ret_regs.r9 = reg_assocs[9].value.reg64;
-            ret_regs.r10 = reg_assocs[10].value.reg64;
-            ret_regs.r11 = reg_assocs[11].value.reg64;
-            ret_regs.r12 = reg_assocs[12].value.reg64;
-            ret_regs.r13 = reg_assocs[13].value.reg64;
-            ret_regs.r14 = reg_assocs[14].value.reg64;
-            ret_regs.r15 = reg_assocs[15].value.reg64;
-            ret_regs.rip = reg_assocs[16].value.reg64;
-            ret_regs.rflags = reg_assocs[17].value.reg64;
+            ret_regs.rax = get_gp_regs_field_ptr!(vp_reg_page, rax);
+            ret_regs.rbx = get_gp_regs_field_ptr!(vp_reg_page, rbx);
+            ret_regs.rcx = get_gp_regs_field_ptr!(vp_reg_page, rcx);
+            ret_regs.rdx = get_gp_regs_field_ptr!(vp_reg_page, rdx);
+            ret_regs.rsi = get_gp_regs_field_ptr!(vp_reg_page, rsi);
+            ret_regs.rdi = get_gp_regs_field_ptr!(vp_reg_page, rdi);
+            ret_regs.rsp = get_gp_regs_field_ptr!(vp_reg_page, rsp);
+            ret_regs.rbp = get_gp_regs_field_ptr!(vp_reg_page, rbp);
+            ret_regs.r8 = get_gp_regs_field_ptr!(vp_reg_page, r8);
+            ret_regs.r9 = get_gp_regs_field_ptr!(vp_reg_page, r9);
+            ret_regs.r10 = get_gp_regs_field_ptr!(vp_reg_page, r10);
+            ret_regs.r11 = get_gp_regs_field_ptr!(vp_reg_page, r11);
+            ret_regs.r12 = get_gp_regs_field_ptr!(vp_reg_page, r12);
+            ret_regs.r13 = get_gp_regs_field_ptr!(vp_reg_page, r13);
+            ret_regs.r14 = get_gp_regs_field_ptr!(vp_reg_page, r14);
+            ret_regs.r15 = get_gp_regs_field_ptr!(vp_reg_page, r15);
+            ret_regs.rip = (*vp_reg_page).__bindgen_anon_1.__bindgen_anon_1.rip;
+            ret_regs.rflags = (*vp_reg_page).__bindgen_anon_1.__bindgen_anon_1.rflags;
         }
 
         Ok(ret_regs)
     }
+
     /// Returns the vCPU special registers.
     #[cfg(not(target_arch = "aarch64"))]
     pub fn get_sregs(&self) -> Result<SpecialRegisters> {