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From: Yifei Jiang <jiangyifei@huawei.com>
To: <qemu-devel@nongnu.org>, <qemu-riscv@nongnu.org>
Cc: <kvm-riscv@lists.infradead.org>, <kvm@vger.kernel.org>,
	<libvir-list@redhat.com>, <anup.patel@wdc.com>,
	<palmer@dabbelt.com>, <Alistair.Francis@wdc.com>,
	<sagark@eecs.berkeley.edu>, <kbastian@mail.uni-paderborn.de>,
	<bin.meng@windriver.com>, <fanliang@huawei.com>,
	<wu.wubin@huawei.com>, <zhang.zhanghailiang@huawei.com>,
	<yinyipeng1@huawei.com>, Yifei Jiang <jiangyifei@huawei.com>
Subject: [PATCH RFC v5 11/12] target/riscv: Implement virtual time adjusting with vm state changing
Date: Mon, 12 Apr 2021 14:52:45 +0800	[thread overview]
Message-ID: <20210412065246.1853-12-jiangyifei@huawei.com> (raw)
In-Reply-To: <20210412065246.1853-1-jiangyifei@huawei.com>

We hope that virtual time adjusts with vm state changing. When a vm
is stopped, guest virtual time should stop counting and kvm_timer
should be stopped. When the vm is resumed, guest virtual time should
continue to count and kvm_timer should be restored.

Signed-off-by: Yifei Jiang <jiangyifei@huawei.com>
Signed-off-by: Yipeng Yin <yinyipeng1@huawei.com>
---
 target/riscv/kvm.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index ec693795ce..50328c537e 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -40,6 +40,7 @@
 #include "kvm_riscv.h"
 #include "sbi_ecall_interface.h"
 #include "chardev/char-fe.h"
+#include "sysemu/runstate.h"
 
 static __u64 kvm_riscv_reg_id(CPURISCVState *env, __u64 type, __u64 idx)
 {
@@ -448,6 +449,17 @@ unsigned long kvm_arch_vcpu_id(CPUState *cpu)
     return cpu->cpu_index;
 }
 
+static void kvm_riscv_vm_state_change(void *opaque, int running, RunState state)
+{
+    CPUState *cs = opaque;
+
+    if (running) {
+        kvm_riscv_put_regs_timer(cs);
+    } else {
+        kvm_riscv_get_regs_timer(cs);
+    }
+}
+
 void kvm_arch_init_irq_routing(KVMState *s)
 {
 }
@@ -460,6 +472,8 @@ int kvm_arch_init_vcpu(CPUState *cs)
     CPURISCVState *env = &cpu->env;
     __u64 id;
 
+    qemu_add_vm_change_state_handler(kvm_riscv_vm_state_change, cs);
+
     id = kvm_riscv_reg_id(env, KVM_REG_RISCV_CONFIG, KVM_REG_RISCV_CONFIG_REG(isa));
     ret = kvm_get_one_reg(cs, id, &isa);
     if (ret) {
-- 
2.19.1


  parent reply	other threads:[~2021-04-12  6:53 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-04-12  6:52 [PATCH RFC v5 00/12] Add riscv kvm accel support Yifei Jiang
2021-04-12  6:52 ` [PATCH RFC v5 01/12] linux-header: Update linux/kvm.h Yifei Jiang
2021-04-12  6:52 ` [PATCH RFC v5 02/12] target/riscv: Add target/riscv/kvm.c to place the public kvm interface Yifei Jiang
2021-04-12  6:52 ` [PATCH RFC v5 03/12] target/riscv: Implement function kvm_arch_init_vcpu Yifei Jiang
2021-04-14 22:32   ` Alistair Francis
2021-04-12  6:52 ` [PATCH RFC v5 04/12] target/riscv: Implement kvm_arch_get_registers Yifei Jiang
2021-04-14 22:39   ` Alistair Francis
2021-04-12  6:52 ` [PATCH RFC v5 05/12] target/riscv: Implement kvm_arch_put_registers Yifei Jiang
2021-04-14 22:46   ` Alistair Francis
2021-04-12  6:52 ` [PATCH RFC v5 06/12] target/riscv: Support start kernel directly by KVM Yifei Jiang
2021-04-14 22:48   ` Alistair Francis
2021-04-12  6:52 ` [PATCH RFC v5 07/12] hw/riscv: PLIC update external interrupt by KVM when kvm enabled Yifei Jiang
2021-04-14 22:50   ` Alistair Francis
2021-04-30  4:53   ` Anup Patel
2021-05-06  7:59     ` Jiangyifei
2021-04-12  6:52 ` [PATCH RFC v5 08/12] target/riscv: Handle KVM_EXIT_RISCV_SBI exit Yifei Jiang
2021-04-12  6:52 ` [PATCH RFC v5 09/12] target/riscv: Add host cpu type Yifei Jiang
2021-04-14 22:33   ` Alistair Francis
2021-04-12  6:52 ` [PATCH RFC v5 10/12] target/riscv: Add kvm_riscv_get/put_regs_timer Yifei Jiang
2021-04-12  6:52 ` Yifei Jiang [this message]
2021-04-12  6:52 ` [PATCH RFC v5 12/12] target/riscv: Support virtual time context synchronization Yifei Jiang

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