[PATCH 1/4] system: Select WHPX by default when no other accelerator is available

[Philippe Mathieu-Daudé]

When testing with a WHPX-only binary, we get:

  qemu-system-aarch64.exe: No accelerator selected and no default accelerator 
available

Fix by checking for WHPX in configure_accelerators() and using
it by default when no other accelerator is available, similarly
to commit 964d2a0cf81 ("system: Select HVF by default ...").

Signed-off-by: Philippe Mathieu-Daudé <phi...@oss.qualcomm.com>
---
 system/vl.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/system/vl.c b/system/vl.c
index 1d14e2e2076..4f6d1e1ca8b 100644
--- a/system/vl.c
+++ b/system/vl.c
@@ -2444,6 +2444,7 @@ static void configure_accelerators(const char *progname)
             bool have_tcg = accel_find("tcg");
             bool have_kvm = accel_find("kvm");
             bool have_hvf = accel_find("hvf");
+            const bool have_whpx = accel_find("whpx");
 
             if (have_tcg && have_kvm) {
                 if (g_str_has_suffix(progname, "kvm")) {
@@ -2458,6 +2459,8 @@ static void configure_accelerators(const char *progname)
                 accelerators = "tcg";
             } else if (have_hvf) {
                 accelerators = "hvf";
+            } else if (have_whpx) {
+                accelerators = "whpx";
             } else {
                 error_report("No accelerator selected and"
                              " no default accelerator available");
-- 
2.53.0