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>,
<bin.meng@windriver.com>, <wu.wubin@huawei.com>,
<fanliang@huawei.com>, <wanghaibin.wang@huawei.com>,
<limingwang@huawei.com>, Yifei Jiang <jiangyifei@huawei.com>
Subject: [PATCH RFC v6 11/12] target/riscv: Implement virtual time adjusting with vm state changing
Date: Tue, 17 Aug 2021 11:24:46 +0800 [thread overview]
Message-ID: <20210817032447.2055-12-jiangyifei@huawei.com> (raw)
In-Reply-To: <20210817032447.2055-1-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: Mingwang Li <limingwang@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 d1ab4b1247..60c61ba924 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 uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type, uint64_t idx)
{
@@ -447,6 +448,17 @@ unsigned long kvm_arch_vcpu_id(CPUState *cpu)
return cpu->cpu_index;
}
+static void kvm_riscv_vm_state_change(void *opaque, bool 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)
{
}
@@ -459,6 +471,8 @@ int kvm_arch_init_vcpu(CPUState *cs)
CPURISCVState *env = &cpu->env;
uint64_t 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
next prev parent reply other threads:[~2021-08-17 3:25 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-17 3:24 [PATCH RFC v6 00/12] Add riscv kvm accel support Yifei Jiang
2021-08-17 3:24 ` [PATCH RFC v6 01/12] linux-header: Update linux/kvm.h Yifei Jiang
2021-08-17 3:24 ` [PATCH RFC v6 02/12] target/riscv: Add target/riscv/kvm.c to place the public kvm interface Yifei Jiang
2021-08-17 3:24 ` [PATCH RFC v6 03/12] target/riscv: Implement function kvm_arch_init_vcpu Yifei Jiang
2021-08-17 3:24 ` [PATCH RFC v6 04/12] target/riscv: Implement kvm_arch_get_registers Yifei Jiang
2021-08-17 3:24 ` [PATCH RFC v6 05/12] target/riscv: Implement kvm_arch_put_registers Yifei Jiang
2021-08-17 3:24 ` [PATCH RFC v6 06/12] target/riscv: Support start kernel directly by KVM Yifei Jiang
2021-08-17 3:24 ` [PATCH RFC v6 07/12] target/riscv: Support setting external interrupt " Yifei Jiang
2021-08-17 3:24 ` [PATCH RFC v6 08/12] target/riscv: Handle KVM_EXIT_RISCV_SBI exit Yifei Jiang
2021-08-19 6:13 ` Alistair Francis
2021-08-20 9:23 ` Jiangyifei
2021-08-17 3:24 ` [PATCH RFC v6 09/12] target/riscv: Add host cpu type Yifei Jiang
2021-08-17 3:24 ` [PATCH RFC v6 10/12] target/riscv: Add kvm_riscv_get/put_regs_timer Yifei Jiang
2021-08-17 3:24 ` Yifei Jiang [this message]
2021-08-17 3:24 ` [PATCH RFC v6 12/12] target/riscv: Support virtual time context synchronization Yifei Jiang
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