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@brainfault.org>,
<palmer@dabbelt.com>, <Alistair.Francis@wdc.com>,
<bin.meng@windriver.com>, <fanliang@huawei.com>,
<wu.wubin@huawei.com>, <wanghaibin.wang@huawei.com>,
<wanbo13@huawei.com>, Yifei Jiang <jiangyifei@huawei.com>,
Mingwang Li <limingwang@huawei.com>,
Anup Patel <anup.patel@wdc.com>,
Alistair Francis <alistair.francis@wdc.com>
Subject: [PATCH v5 11/13] target/riscv: Implement virtual time adjusting with vm state changing
Date: Wed, 12 Jan 2022 16:13:27 +0800 [thread overview]
Message-ID: <20220112081329.1835-12-jiangyifei@huawei.com> (raw)
In-Reply-To: <20220112081329.1835-1-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>
Reviewed-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
---
target/riscv/kvm.c | 15 +++++++++++++++
1 file changed, 15 insertions(+)
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index a43d5a2988..e6b7cb6d4d 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -41,6 +41,7 @@
#include "sbi_ecall_interface.h"
#include "chardev/char-fe.h"
#include "migration/migration.h"
+#include "sysemu/runstate.h"
static uint64_t kvm_riscv_reg_id(CPURISCVState *env, uint64_t type,
uint64_t idx)
@@ -378,6 +379,18 @@ 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)
{
}
@@ -390,6 +403,8 @@ 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);
--
2.19.1
next prev parent reply other threads:[~2022-01-12 8:14 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-01-12 8:13 [PATCH v5 00/13] Add riscv kvm accel support Yifei Jiang
2022-01-12 8:13 ` [PATCH v5 01/13] update-linux-headers: Add asm-riscv/kvm.h Yifei Jiang
2022-01-12 8:13 ` [PATCH v5 02/13] target/riscv: Add target/riscv/kvm.c to place the public kvm interface Yifei Jiang
2022-01-12 8:13 ` [PATCH v5 03/13] target/riscv: Implement function kvm_arch_init_vcpu Yifei Jiang
2022-01-12 8:13 ` [PATCH v5 04/13] target/riscv: Implement kvm_arch_get_registers Yifei Jiang
2022-01-12 8:13 ` [PATCH v5 05/13] target/riscv: Implement kvm_arch_put_registers Yifei Jiang
2022-01-12 8:13 ` [PATCH v5 06/13] target/riscv: Support start kernel directly by KVM Yifei Jiang
2022-01-13 4:35 ` Anup Patel
2022-01-12 8:13 ` [PATCH v5 07/13] target/riscv: Support setting external interrupt " Yifei Jiang
2022-01-12 8:13 ` [PATCH v5 08/13] target/riscv: Handle KVM_EXIT_RISCV_SBI exit Yifei Jiang
2022-01-12 8:13 ` [PATCH v5 09/13] target/riscv: Add host cpu type Yifei Jiang
2022-01-12 8:13 ` [PATCH v5 10/13] target/riscv: Add kvm_riscv_get/put_regs_timer Yifei Jiang
2022-01-12 8:13 ` Yifei Jiang [this message]
2022-01-12 8:13 ` [PATCH v5 12/13] target/riscv: Support virtual time context synchronization Yifei Jiang
2022-01-12 8:13 ` [PATCH v5 13/13] target/riscv: enable riscv kvm accel Yifei Jiang
2022-01-13 4:30 ` Alistair Francis
2022-01-13 4:41 ` Anup Patel
2022-01-17 22:48 ` [PATCH v5 00/13] Add riscv kvm accel support Alistair Francis
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20220112081329.1835-12-jiangyifei@huawei.com \
--to=jiangyifei@huawei.com \
--cc=Alistair.Francis@wdc.com \
--cc=anup.patel@wdc.com \
--cc=anup@brainfault.org \
--cc=bin.meng@windriver.com \
--cc=fanliang@huawei.com \
--cc=kvm-riscv@lists.infradead.org \
--cc=kvm@vger.kernel.org \
--cc=libvir-list@redhat.com \
--cc=limingwang@huawei.com \
--cc=palmer@dabbelt.com \
--cc=qemu-devel@nongnu.org \
--cc=qemu-riscv@nongnu.org \
--cc=wanbo13@huawei.com \
--cc=wanghaibin.wang@huawei.com \
--cc=wu.wubin@huawei.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).