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plugins: add userdata to qemu_plugin_register_vcpu_syscall_filter_cb

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Reviewed-by: Manos Pitsidianakis <manos.pitsidianakis@linaro.org>
Link: https://lore.kernel.org/qemu-devel/20260615193526.2883349-21-pierrick.bouvier@oss.qualcomm.com
Signed-off-by: Pierrick Bouvier <pierrick.bouvier@oss.qualcomm.com>
This commit is contained in:
Pierrick Bouvier
2026-06-15 12:35:19 -07:00
parent b8cdea393f
commit d7706f7e89
5 changed files with 14 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
include/plugins/qemu-plugin.h
View File

@@ -863,6 +863,7 @@ typedef void
* @a7: the 7th syscall argument
* @a8: the 8th syscall argument
* @sysret: reference of the syscall return value, must set this if filtered
* @userdata: user data for callback
*
* Returns true if you want to filter this syscall (i.e. stop it being
* handled further), otherwise returns false.
@@ -872,7 +873,8 @@ typedef bool
int64_t num, uint64_t a1, uint64_t a2,
uint64_t a3, uint64_t a4, uint64_t a5,
uint64_t a6, uint64_t a7, uint64_t a8,
uint64_t *sysret);
uint64_t *sysret,
void *userdata);
/**
* typedef qemu_plugin_vcpu_syscall_ret_cb_t - vCPU syscall return callback
@@ -906,6 +908,7 @@ void qemu_plugin_register_vcpu_syscall_cb(qemu_plugin_id_t id,
* callback
* @id: plugin id
* @cb: callback of type qemu_plugin_vcpu_syscall_filter_cb_t
* @userdata: user data for callback
*
* This registers a callback for every syscall executed by the guest. The @cb
* function is executed before a syscall is handled by the host. If the
@@ -916,7 +919,8 @@ void qemu_plugin_register_vcpu_syscall_cb(qemu_plugin_id_t id,
QEMU_PLUGIN_API
void
qemu_plugin_register_vcpu_syscall_filter_cb(qemu_plugin_id_t id,
qemu_plugin_vcpu_syscall_filter_cb_t cb);
qemu_plugin_vcpu_syscall_filter_cb_t cb,
void *userdata);
/**
* qemu_plugin_register_vcpu_syscall_ret_cb() - register a syscall entry

5
plugins/api.c
View File

@@ -217,9 +217,10 @@ qemu_plugin_register_vcpu_syscall_ret_cb(qemu_plugin_id_t id,
void
qemu_plugin_register_vcpu_syscall_filter_cb(qemu_plugin_id_t id,
qemu_plugin_vcpu_syscall_filter_cb_t cb)
qemu_plugin_vcpu_syscall_filter_cb_t cb,
void *userdata)
{
plugin_register_cb(id, QEMU_PLUGIN_EV_VCPU_SYSCALL_FILTER, cb);
plugin_register_cb_udata(id, QEMU_PLUGIN_EV_VCPU_SYSCALL_FILTER, cb, userdata);
}
/*

2
plugins/core.c
View File

@@ -591,7 +591,7 @@ qemu_plugin_vcpu_syscall_filter(CPUState *cpu, int64_t num, uint64_t a1,
qemu_plugin_vcpu_syscall_filter_cb_t func = cb->f.vcpu_syscall_filter;
if (func(cpu->cpu_index, num, a1, a2, a3, a4,
a5, a6, a7, a8, sysret)) {
a5, a6, a7, a8, sysret, cb->udata)) {
filtered = true;
break;
}

4
tests/tcg/plugins/setpc.c
View File

@@ -27,7 +27,7 @@ static bool vcpu_syscall_filter(unsigned int vcpu_index,
int64_t num, uint64_t a1, uint64_t a2,
uint64_t a3, uint64_t a4, uint64_t a5,
uint64_t a6, uint64_t a7, uint64_t a8,
uint64_t *sysret)
uint64_t *sysret, void *userdata)
{
if (num == MAGIC_SYSCALL) {
if (a1 == SETPC) {
@@ -99,7 +99,7 @@ QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id,
int argc, char **argv)
{
qemu_plugin_register_vcpu_syscall_filter_cb(id, vcpu_syscall_filter);
qemu_plugin_register_vcpu_syscall_filter_cb(id, vcpu_syscall_filter, NULL);
qemu_plugin_register_vcpu_tb_trans_cb(id, vcpu_tb_trans, NULL);
return 0;
}

4
tests/tcg/plugins/syscall.c
View File

@@ -175,7 +175,7 @@ static bool vcpu_syscall_filter(unsigned int vcpu_index,
int64_t num, uint64_t a1, uint64_t a2,
uint64_t a3, uint64_t a4, uint64_t a5,
uint64_t a6, uint64_t a7, uint64_t a8,
uint64_t *sysret)
uint64_t *sysret, void *userdata)
{
/* Special syscall to test the filter functionality. */
if (num == 4096 && a1 == 0x66CCFF) {
@@ -274,7 +274,7 @@ QEMU_PLUGIN_EXPORT int qemu_plugin_install(qemu_plugin_id_t id,
qemu_plugin_register_vcpu_syscall_cb(id, vcpu_syscall, NULL);
qemu_plugin_register_vcpu_syscall_ret_cb(id, vcpu_syscall_ret);
qemu_plugin_register_vcpu_syscall_filter_cb(id, vcpu_syscall_filter);
qemu_plugin_register_vcpu_syscall_filter_cb(id, vcpu_syscall_filter, NULL);
qemu_plugin_register_atexit_cb(id, plugin_exit, NULL);
return 0;
}