whpx: i386: add implementation of new x86_emul_ops

target/i386/emulate now has new ops for fetching whether the guest is in
protected mode, long mode or user mode without fetching control
registers.

Use those for faster vmexits.

Signed-off-by: Mohamed Mediouni <mohamed@unpredictable.fr>
Link: https://lore.kernel.org/r/20260324151323.74473-8-mohamed@unpredictable.fr
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/target/i386/whpx/whpx-all.c b/target/i386/whpx/whpx-all.c
index 69d141e7cce8d858ad0b3c92c6b4ff149b0af515..b97dc9fd514419f631596e7b5f7cb96bae63b7c5 100644 (file)
--- a/target/i386/whpx/whpx-all.c
+++ b/target/i386/whpx/whpx-all.c
@@ -885,10 +885,32 @@ static void read_segment_descriptor(CPUState *cpu,
     }
 }
 
+static bool is_protected_mode(CPUState *cpu)
+{
+    AccelCPUState *vcpu = cpu->accel;
+
+    return vcpu->exit_ctx.VpContext.ExecutionState.Cr0Pe == 1;
+}
+
+static bool is_long_mode(CPUState *cpu)
+{
+    AccelCPUState *vcpu = cpu->accel;
+
+    return vcpu->exit_ctx.VpContext.ExecutionState.EferLma == 1;
+}
+
+static bool is_user_mode(CPUState *cpu)
+{
+    AccelCPUState *vcpu = cpu->accel;
+    return vcpu->exit_ctx.VpContext.ExecutionState.Cpl == 3;
+}
 
 static const struct x86_emul_ops whpx_x86_emul_ops = {
     .read_segment_descriptor = read_segment_descriptor,
-    .handle_io = handle_io
+    .handle_io = handle_io,
+    .is_protected_mode = is_protected_mode,
+    .is_long_mode = is_long_mode,
+    .is_user_mode = is_user_mode
 };
 
 static void whpx_init_emu(void)