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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>,
	<victor.zhangxiaofeng@huawei.com>, <wu.wubin@huawei.com>,
	<zhang.zhanghailiang@huawei.com>, <dengkai1@huawei.com>,
	<yinyipeng1@huawei.com>, Yifei Jiang <jiangyifei@huawei.com>
Subject: [PATCH RFC v4 14/15] target/riscv: Synchronize vcpu's frequency with KVM
Date: Thu, 3 Dec 2020 20:47:02 +0800	[thread overview]
Message-ID: <20201203124703.168-15-jiangyifei@huawei.com> (raw)
In-Reply-To: <20201203124703.168-1-jiangyifei@huawei.com>

If vcpu's frequency is specified by cpu option 'frequency', it
will be set into KVM by KVM_SET_ONE_REG ioctl. Otherwise, vcpu's
frequency will follow KVM by KVM_GET_ONE_REG ioctl.

Signed-off-by: Yifei Jiang <jiangyifei@huawei.com>
Signed-off-by: Yipeng Yin <yinyipeng1@huawei.com>
---
 target/riscv/kvm.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index 1e16d24544..3499efd4eb 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -409,6 +409,8 @@ int kvm_arch_get_registers(CPUState *cs)
 int kvm_arch_put_registers(CPUState *cs, int level)
 {
     int ret = 0;
+    RISCVCPU *cpu = RISCV_CPU(cs);
+    CPURISCVState *env = &cpu->env;
 
     ret = kvm_riscv_put_regs_core(cs);
     if (ret) {
@@ -425,6 +427,10 @@ int kvm_arch_put_registers(CPUState *cs, int level)
         return ret;
     }
 
+    if (env->frequency) {
+        ret = kvm_set_one_reg(cs, RISCV_TIMER_REG(frequency), &env->frequency);
+    }
+
     return ret;
 }
 
@@ -481,6 +487,17 @@ int kvm_arch_init_vcpu(CPUState *cs)
     }
     env->misa = isa;
 
+    /*
+     * Synchronize vcpu's frequency with KVM. If vcpu's frequency is specified
+     * by cpu option 'frequency', this will be set to KVM. Otherwise, vcpu's
+     * frequency will follow KVM.
+     */
+    if (env->user_frequency) {
+        ret = kvm_set_one_reg(cs, RISCV_TIMER_REG(frequency), &env->frequency);
+    } else {
+        ret = kvm_get_one_reg(cs, RISCV_TIMER_REG(frequency), &env->frequency);
+    }
+
     return ret;
 }
 
-- 
2.19.1


WARNING: multiple messages have this Message-ID (diff)
From: Yifei Jiang <jiangyifei@huawei.com>
To: <qemu-devel@nongnu.org>, <qemu-riscv@nongnu.org>
Cc: victor.zhangxiaofeng@huawei.com, sagark@eecs.berkeley.edu,
	kvm@vger.kernel.org, libvir-list@redhat.com,
	kbastian@mail.uni-paderborn.de, anup.patel@wdc.com,
	yinyipeng1@huawei.com, Alistair.Francis@wdc.com,
	Yifei Jiang <jiangyifei@huawei.com>,
	kvm-riscv@lists.infradead.org, palmer@dabbelt.com,
	dengkai1@huawei.com, wu.wubin@huawei.com,
	zhang.zhanghailiang@huawei.com
Subject: [PATCH RFC v4 14/15] target/riscv: Synchronize vcpu's frequency with KVM
Date: Thu, 3 Dec 2020 20:47:02 +0800	[thread overview]
Message-ID: <20201203124703.168-15-jiangyifei@huawei.com> (raw)
In-Reply-To: <20201203124703.168-1-jiangyifei@huawei.com>

If vcpu's frequency is specified by cpu option 'frequency', it
will be set into KVM by KVM_SET_ONE_REG ioctl. Otherwise, vcpu's
frequency will follow KVM by KVM_GET_ONE_REG ioctl.

Signed-off-by: Yifei Jiang <jiangyifei@huawei.com>
Signed-off-by: Yipeng Yin <yinyipeng1@huawei.com>
---
 target/riscv/kvm.c | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index 1e16d24544..3499efd4eb 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -409,6 +409,8 @@ int kvm_arch_get_registers(CPUState *cs)
 int kvm_arch_put_registers(CPUState *cs, int level)
 {
     int ret = 0;
+    RISCVCPU *cpu = RISCV_CPU(cs);
+    CPURISCVState *env = &cpu->env;
 
     ret = kvm_riscv_put_regs_core(cs);
     if (ret) {
@@ -425,6 +427,10 @@ int kvm_arch_put_registers(CPUState *cs, int level)
         return ret;
     }
 
+    if (env->frequency) {
+        ret = kvm_set_one_reg(cs, RISCV_TIMER_REG(frequency), &env->frequency);
+    }
+
     return ret;
 }
 
@@ -481,6 +487,17 @@ int kvm_arch_init_vcpu(CPUState *cs)
     }
     env->misa = isa;
 
+    /*
+     * Synchronize vcpu's frequency with KVM. If vcpu's frequency is specified
+     * by cpu option 'frequency', this will be set to KVM. Otherwise, vcpu's
+     * frequency will follow KVM.
+     */
+    if (env->user_frequency) {
+        ret = kvm_set_one_reg(cs, RISCV_TIMER_REG(frequency), &env->frequency);
+    } else {
+        ret = kvm_get_one_reg(cs, RISCV_TIMER_REG(frequency), &env->frequency);
+    }
+
     return ret;
 }
 
-- 
2.19.1



  parent reply	other threads:[~2020-12-03 12:48 UTC|newest]

Thread overview: 52+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-12-03 12:46 [PATCH RFC v4 00/15] Add riscv kvm accel support Yifei Jiang
2020-12-03 12:46 ` Yifei Jiang
2020-12-03 12:46 ` [PATCH RFC v4 01/15] linux-header: Update linux/kvm.h Yifei Jiang
2020-12-03 12:46   ` Yifei Jiang
2020-12-03 12:46 ` [PATCH RFC v4 02/15] target/riscv: Add target/riscv/kvm.c to place the public kvm interface Yifei Jiang
2020-12-03 12:46   ` Yifei Jiang
2020-12-03 12:46 ` [PATCH RFC v4 03/15] target/riscv: Implement function kvm_arch_init_vcpu Yifei Jiang
2020-12-03 12:46   ` Yifei Jiang
2020-12-08 22:13   ` Alistair Francis
2020-12-08 22:13     ` Alistair Francis
2020-12-03 12:46 ` [PATCH RFC v4 04/15] target/riscv: Implement kvm_arch_get_registers Yifei Jiang
2020-12-03 12:46   ` Yifei Jiang
2020-12-03 12:46 ` [PATCH RFC v4 05/15] target/riscv: Implement kvm_arch_put_registers Yifei Jiang
2020-12-03 12:46   ` Yifei Jiang
2020-12-03 12:46 ` [PATCH RFC v4 06/15] target/riscv: Support start kernel directly by KVM Yifei Jiang
2020-12-03 12:46   ` Yifei Jiang
2020-12-08 22:19   ` Alistair Francis
2020-12-08 22:19     ` Alistair Francis
2020-12-15  7:19     ` Jiangyifei
2020-12-15  7:19       ` Jiangyifei
2020-12-03 12:46 ` [PATCH RFC v4 07/15] hw/riscv: PLIC update external interrupt by KVM when kvm enabled Yifei Jiang
2020-12-03 12:46   ` Yifei Jiang
2020-12-08 22:29   ` Alistair Francis
2020-12-08 22:29     ` Alistair Francis
2020-12-15  7:33     ` Jiangyifei
2020-12-15  7:33       ` Jiangyifei
2020-12-03 12:46 ` [PATCH RFC v4 08/15] target/riscv: Handle KVM_EXIT_RISCV_SBI exit Yifei Jiang
2020-12-03 12:46   ` Yifei Jiang
2020-12-03 12:46 ` [PATCH RFC v4 09/15] target/riscv: Add host cpu type Yifei Jiang
2020-12-03 12:46   ` Yifei Jiang
2020-12-08 22:21   ` Alistair Francis
2020-12-08 22:21     ` Alistair Francis
2020-12-15  7:21     ` Jiangyifei
2020-12-15  7:21       ` Jiangyifei
2020-12-03 12:46 ` [PATCH RFC v4 10/15] target/riscv: Add kvm_riscv_get/put_regs_timer Yifei Jiang
2020-12-03 12:46   ` Yifei Jiang
2020-12-03 12:46 ` [PATCH RFC v4 11/15] target/riscv: Implement virtual time adjusting with vm state changing Yifei Jiang
2020-12-03 12:46   ` Yifei Jiang
2020-12-03 12:47 ` [PATCH RFC v4 12/15] target/riscv: Support virtual time context synchronization Yifei Jiang
2020-12-03 12:47   ` Yifei Jiang
2020-12-03 12:47 ` [PATCH RFC v4 13/15] target/riscv: Introduce dynamic time frequency for virt machine Yifei Jiang
2020-12-03 12:47   ` Yifei Jiang
2020-12-08 22:25   ` Alistair Francis
2020-12-08 22:25     ` Alistair Francis
2020-12-15  7:31     ` Jiangyifei
2020-12-15  7:31       ` Jiangyifei
2021-01-05 17:36       ` Alistair Francis
2021-01-05 17:36         ` Alistair Francis
2020-12-03 12:47 ` Yifei Jiang [this message]
2020-12-03 12:47   ` [PATCH RFC v4 14/15] target/riscv: Synchronize vcpu's frequency with KVM Yifei Jiang
2020-12-03 12:47 ` [PATCH RFC v4 15/15] target/riscv: Add time frequency migration support Yifei Jiang
2020-12-03 12:47   ` Yifei Jiang

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