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>
Mohamed Mediouni committed
Mar 24, 2026 at 16:13 UTC
e2a11aea4e6e4046f1686acaa07c16ef903989c9
1 file changed
+23
-1
target/i386/whpx/whpx-all.c
+23
-1
@@ -885,10 +885,32 @@ static void read_segment_descriptor(CPUState *cpu,
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}
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}
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+static bool is_protected_mode(CPUState *cpu)
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+{
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+ AccelCPUState *vcpu = cpu->accel;
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+
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+ return vcpu->exit_ctx.VpContext.ExecutionState.Cr0Pe == 1;
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+}
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+
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+static bool is_long_mode(CPUState *cpu)
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+{
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+ AccelCPUState *vcpu = cpu->accel;
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+
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+ return vcpu->exit_ctx.VpContext.ExecutionState.EferLma == 1;
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+}
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+
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+static bool is_user_mode(CPUState *cpu)
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+{
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+ AccelCPUState *vcpu = cpu->accel;
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+ return vcpu->exit_ctx.VpContext.ExecutionState.Cpl == 3;
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+}
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static const struct x86_emul_ops whpx_x86_emul_ops = {
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.read_segment_descriptor = read_segment_descriptor,
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- .handle_io = handle_io
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+ .handle_io = handle_io,
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+ .is_protected_mode = is_protected_mode,
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+ .is_long_mode = is_long_mode,
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+ .is_user_mode = is_user_mode
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};
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static void whpx_init_emu(void)