From b4ff21284be784b5dc0f5dc8f3be07e57aa3faf8 Mon Sep 17 00:00:00 2001 From: Akihiko Odaki Date: Mon, 6 Nov 2023 18:51:01 +0000 Subject: [PATCH] cpu: Call plugin hooks only when ready MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit The initialization and exit hooks will not affect the state of vCPU outside TCG context, but they may depend on the state of vCPU. Therefore, it's better to call plugin hooks after the vCPU state is fully initialized and before it gets uninitialized. Signed-off-by: Akihiko Odaki Reviewed-by: Alex Bennée Message-Id: <20231025093128.33116-16-akihiko.odaki@daynix.com> Signed-off-by: Alex Bennée Message-Id: <20231106185112.2755262-12-alex.bennee@linaro.org> --- cpu-target.c | 11 ----------- hw/core/cpu-common.c | 10 ++++++++++ 2 files changed, 10 insertions(+), 11 deletions(-) diff --git a/cpu-target.c b/cpu-target.c index f3e1ad8bcd..508013e23d 100644 --- a/cpu-target.c +++ b/cpu-target.c @@ -42,7 +42,6 @@ #include "hw/core/accel-cpu.h" #include "trace/trace-root.h" #include "qemu/accel.h" -#include "qemu/plugin.h" uintptr_t qemu_host_page_size; intptr_t qemu_host_page_mask; @@ -143,11 +142,6 @@ bool cpu_exec_realizefn(CPUState *cpu, Error **errp) /* Wait until cpu initialization complete before exposing cpu. */ cpu_list_add(cpu); - /* Plugin initialization must wait until cpu_index assigned. */ - if (tcg_enabled()) { - qemu_plugin_vcpu_init_hook(cpu); - } - #ifdef CONFIG_USER_ONLY assert(qdev_get_vmsd(DEVICE(cpu)) == NULL || qdev_get_vmsd(DEVICE(cpu))->unmigratable); @@ -176,11 +170,6 @@ void cpu_exec_unrealizefn(CPUState *cpu) } #endif - /* Call the plugin hook before clearing cpu->cpu_index in cpu_list_remove */ - if (tcg_enabled()) { - qemu_plugin_vcpu_exit_hook(cpu); - } - cpu_list_remove(cpu); /* * Now that the vCPU has been removed from the RCU list, we can call diff --git a/hw/core/cpu-common.c b/hw/core/cpu-common.c index d4112b8919..82dae51a55 100644 --- a/hw/core/cpu-common.c +++ b/hw/core/cpu-common.c @@ -214,6 +214,11 @@ static void cpu_common_realizefn(DeviceState *dev, Error **errp) cpu_resume(cpu); } + /* Plugin initialization must wait until the cpu is fully realized. */ + if (tcg_enabled()) { + qemu_plugin_vcpu_init_hook(cpu); + } + /* NOTE: latest generic point where the cpu is fully realized */ } @@ -221,6 +226,11 @@ static void cpu_common_unrealizefn(DeviceState *dev) { CPUState *cpu = CPU(dev); + /* Call the plugin hook before clearing the cpu is fully unrealized */ + if (tcg_enabled()) { + qemu_plugin_vcpu_exit_hook(cpu); + } + /* NOTE: latest generic point before the cpu is fully unrealized */ cpu_exec_unrealizefn(cpu); } -- 2.11.4.GIT