i386 (MSHV, migration) and Rust changes for 2025-10-09

[PULL 18/35] target/i386/mshv: Add CPU create and remove logic

Paolo Bonzini posted 35 patches 1 month ago

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Maintainers: Paolo Bonzini <pbonzini@redhat.com>, Richard Henderson <richard.henderson@linaro.org>, "Philippe Mathieu-Daudé" <philmd@linaro.org>, Magnus Kulke <magnus.kulke@linux.microsoft.com>, Wei Liu <wei.liu@kernel.org>, "Alex Bennée" <alex.bennee@linaro.org>, Thomas Huth <thuth@redhat.com>, "Daniel P. Berrangé" <berrange@redhat.com>, Markus Armbruster <armbru@redhat.com>, "Dr. David Alan Gilbert" <dave@treblig.org>, Eduardo Habkost <eduardo@habkost.net>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, Yanan Wang <wangyanan55@huawei.com>, Zhao Liu <zhao1.liu@intel.com>, "Michael S. Tsirkin" <mst@redhat.com>, Cornelia Huck <cohuck@redhat.com>, "Marc-André Lureau" <marcandre.lureau@redhat.com>, Eric Blake <eblake@redhat.com>, Manos Pitsidianakis <manos.pitsidianakis@linaro.org>, Cameron Esfahani <dirty@apple.com>, Roman Bolshakov <rbolshakov@ddn.com>, Phil Dennis-Jordan <phil@philjordan.eu>, Marcelo Tosatti <mtosatti@redhat.com>

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[PULL 18/35] target/i386/mshv: Add CPU create and remove logic

Posted by Paolo Bonzini 1 month ago

From: Magnus Kulke <magnuskulke@linux.microsoft.com>

Implement MSHV-specific hooks for vCPU creation and teardown in the
i386 target.

Signed-off-by: Magnus Kulke <magnuskulke@linux.microsoft.com>
Link: https://lore.kernel.org/r/20250916164847.77883-13-magnuskulke@linux.microsoft.com
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---
 target/i386/mshv/mshv-cpu.c | 23 +++++++++++++++++------
 1 file changed, 17 insertions(+), 6 deletions(-)

diff --git a/target/i386/mshv/mshv-cpu.c b/target/i386/mshv/mshv-cpu.c
index 02d71ebc14a..5069ab7a22f 100644
--- a/target/i386/mshv/mshv-cpu.c
+++ b/target/i386/mshv/mshv-cpu.c
@@ -30,6 +30,8 @@
 #include "trace-accel_mshv.h"
 #include "trace.h"
 
+#include <sys/ioctl.h>
+
 int mshv_store_regs(CPUState *cpu)
 {
     error_report("unimplemented");
@@ -62,20 +64,29 @@ int mshv_run_vcpu(int vm_fd, CPUState *cpu, hv_message *msg, MshvVmExit *exit)
 
 void mshv_remove_vcpu(int vm_fd, int cpu_fd)
 {
-    error_report("unimplemented");
-    abort();
+    close(cpu_fd);
 }
 
+
 int mshv_create_vcpu(int vm_fd, uint8_t vp_index, int *cpu_fd)
 {
-    error_report("unimplemented");
-    abort();
+    int ret;
+    struct mshv_create_vp vp_arg = {
+        .vp_index = vp_index,
+    };
+    ret = ioctl(vm_fd, MSHV_CREATE_VP, &vp_arg);
+    if (ret < 0) {
+        error_report("failed to create mshv vcpu: %s", strerror(errno));
+        return -1;
+    }
+
+    *cpu_fd = ret;
+
+    return 0;
 }
 
 void mshv_init_mmio_emu(void)
 {
-    error_report("unimplemented");
-    abort();
 }
 
 void mshv_arch_init_vcpu(CPUState *cpu)
-- 
2.51.0