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From: Liran Alon <liran.alon@oracle.com>
To: qemu-devel@nongnu.org
Cc: pbonzini@redhat.com, mtosatti@redhat.com, rth@twiddle.net,
	ehabkost@redhat.com, kvm@vger.kernel.org, jmattson@google.com,
	maran.wilson@oracle.com, dgilbert@redhat.com,
	Liran Alon <liran.alon@oracle.com>
Subject: [QEMU PATCH v3 1/9] KVM: Introduce kvm_arch_destroy_vcpu()
Date: Mon, 17 Jun 2019 20:56:50 +0300
Message-ID: <20190617175658.135869-2-liran.alon@oracle.com> (raw)
In-Reply-To: <20190617175658.135869-1-liran.alon@oracle.com>

Simiar to how kvm_init_vcpu() calls kvm_arch_init_vcpu() to perform
arch-dependent initialisation, introduce kvm_arch_destroy_vcpu()
to be called from kvm_destroy_vcpu() to perform arch-dependent
destruction.

This was added because some architectures (Such as i386)
currently do not free memory that it have allocated in
kvm_arch_init_vcpu().

Suggested-by: Maran Wilson <maran.wilson@oracle.com>
Signed-off-by: Liran Alon <liran.alon@oracle.com>
---
 accel/kvm/kvm-all.c  |  5 +++++
 include/sysemu/kvm.h |  1 +
 target/arm/kvm32.c   |  5 +++++
 target/arm/kvm64.c   |  5 +++++
 target/i386/kvm.c    | 12 ++++++++++++
 target/mips/kvm.c    |  5 +++++
 target/ppc/kvm.c     |  5 +++++
 target/s390x/kvm.c   | 10 ++++++++++
 8 files changed, 48 insertions(+)

diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index 524c4ddfbd0f..59a3aa3a40da 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -292,6 +292,11 @@ int kvm_destroy_vcpu(CPUState *cpu)
 
     DPRINTF("kvm_destroy_vcpu\n");
 
+    ret = kvm_arch_destroy_vcpu(cpu);
+    if (ret < 0) {
+        goto err;
+    }
+
     mmap_size = kvm_ioctl(s, KVM_GET_VCPU_MMAP_SIZE, 0);
     if (mmap_size < 0) {
         ret = mmap_size;
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index a6d1cd190fed..64f55e519df7 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -371,6 +371,7 @@ int kvm_arch_put_registers(CPUState *cpu, int level);
 int kvm_arch_init(MachineState *ms, KVMState *s);
 
 int kvm_arch_init_vcpu(CPUState *cpu);
+int kvm_arch_destroy_vcpu(CPUState *cpu);
 
 bool kvm_vcpu_id_is_valid(int vcpu_id);
 
diff --git a/target/arm/kvm32.c b/target/arm/kvm32.c
index 4e54e372a668..51f78f722b18 100644
--- a/target/arm/kvm32.c
+++ b/target/arm/kvm32.c
@@ -240,6 +240,11 @@ int kvm_arch_init_vcpu(CPUState *cs)
     return kvm_arm_init_cpreg_list(cpu);
 }
 
+int kvm_arch_destroy_vcpu(CPUState *cs)
+{
+	return 0;
+}
+
 typedef struct Reg {
     uint64_t id;
     int offset;
diff --git a/target/arm/kvm64.c b/target/arm/kvm64.c
index 998d21f399f4..22d19c9aec6f 100644
--- a/target/arm/kvm64.c
+++ b/target/arm/kvm64.c
@@ -654,6 +654,11 @@ int kvm_arch_init_vcpu(CPUState *cs)
     return kvm_arm_init_cpreg_list(cpu);
 }
 
+int kvm_arch_destroy_vcpu(CPUState *cs)
+{
+    return 0;
+}
+
 bool kvm_arm_reg_syncs_via_cpreg_list(uint64_t regidx)
 {
     /* Return true if the regidx is a register we should synchronize
diff --git a/target/i386/kvm.c b/target/i386/kvm.c
index 3b29ce5c0d08..29889aa6b001 100644
--- a/target/i386/kvm.c
+++ b/target/i386/kvm.c
@@ -1349,6 +1349,18 @@ int kvm_arch_init_vcpu(CPUState *cs)
     return r;
 }
 
+int kvm_arch_destroy_vcpu(CPUState *cs)
+{
+    X86CPU *cpu = X86_CPU(cs);
+
+    if (cpu->kvm_msr_buf) {
+        g_free(cpu->kvm_msr_buf);
+        cpu->kvm_msr_buf = NULL;
+    }
+
+    return 0;
+}
+
 void kvm_arch_reset_vcpu(X86CPU *cpu)
 {
     CPUX86State *env = &cpu->env;
diff --git a/target/mips/kvm.c b/target/mips/kvm.c
index 8e72850962e1..938f8f144b74 100644
--- a/target/mips/kvm.c
+++ b/target/mips/kvm.c
@@ -91,6 +91,11 @@ int kvm_arch_init_vcpu(CPUState *cs)
     return ret;
 }
 
+int kvm_arch_destroy_vcpu(CPUState *cs)
+{
+    return 0;
+}
+
 void kvm_mips_reset_vcpu(MIPSCPU *cpu)
 {
     CPUMIPSState *env = &cpu->env;
diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
index 3bf0a46c3352..1967ccc51791 100644
--- a/target/ppc/kvm.c
+++ b/target/ppc/kvm.c
@@ -521,6 +521,11 @@ int kvm_arch_init_vcpu(CPUState *cs)
     return ret;
 }
 
+int kvm_arch_destroy_vcpu(CPUState *cs)
+{
+    return 0;
+}
+
 static void kvm_sw_tlb_put(PowerPCCPU *cpu)
 {
     CPUPPCState *env = &cpu->env;
diff --git a/target/s390x/kvm.c b/target/s390x/kvm.c
index e5e2b691f253..c2747c31649b 100644
--- a/target/s390x/kvm.c
+++ b/target/s390x/kvm.c
@@ -368,6 +368,16 @@ int kvm_arch_init_vcpu(CPUState *cs)
     return 0;
 }
 
+int kvm_arch_destroy_vcpu(CPUState *cs)
+{
+    S390CPU *cpu = S390_CPU(cs);
+
+    g_free(cpu->irqstate);
+    cpu->irqstate = NULL;
+
+    return 0;
+}
+
 void kvm_s390_reset_vcpu(S390CPU *cpu)
 {
     CPUState *cs = CPU(cpu);
-- 
2.20.1


  reply index

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-17 17:56 [QEMU PATCH v3 0/9]: KVM: i386: Add support for save and restore of nested state Liran Alon
2019-06-17 17:56 ` Liran Alon [this message]
2019-06-18 22:15   ` [Qemu-devel] [QEMU PATCH v3 1/9] KVM: Introduce kvm_arch_destroy_vcpu() Maran Wilson
2019-06-17 17:56 ` [QEMU PATCH v3 2/9] KVM: i386: Use symbolic constant for #DB/#BP exception constants Liran Alon
2019-06-17 17:56 ` [QEMU PATCH v3 3/9] KVM: i386: Re-inject #DB to guest with updated DR6 Liran Alon
2019-06-17 17:56 ` [QEMU PATCH v3 4/9] KVM: i386: Block migration for vCPUs exposed with nested virtualization Liran Alon
2019-06-18  8:44   ` Dr. David Alan Gilbert
2019-06-18 22:16   ` [Qemu-devel] " Maran Wilson
2019-06-17 17:56 ` [QEMU PATCH v3 5/9] linux-headers: i386: Modify struct kvm_nested_state to have explicit fields for data Liran Alon
2019-06-18 22:16   ` [Qemu-devel] " Maran Wilson
2019-06-17 17:56 ` [QEMU PATCH v3 6/9] vmstate: Add support for kernel integer types Liran Alon
2019-06-18  8:55   ` Dr. David Alan Gilbert
2019-06-18 15:36     ` Liran Alon
2019-06-18 15:42       ` Dr. David Alan Gilbert
2019-06-18 16:44         ` Paolo Bonzini
2019-06-17 17:56 ` [QEMU PATCH v3 7/9] KVM: i386: Add support for save and restore nested state Liran Alon
2019-06-18  9:03   ` Dr. David Alan Gilbert
2019-06-18 15:40     ` Liran Alon
2019-06-18 15:48       ` Dr. David Alan Gilbert
2019-06-18 15:50         ` Liran Alon
2019-06-18 16:16         ` Paolo Bonzini
2019-06-18 22:16   ` [Qemu-devel] " Maran Wilson
2019-06-17 17:56 ` [QEMU PATCH v3 8/9] KVM: i386: Add support for KVM_CAP_EXCEPTION_PAYLOAD Liran Alon
2019-06-18  9:07   ` Dr. David Alan Gilbert
2019-06-18 15:45     ` Liran Alon
2019-06-17 17:56 ` [QEMU PATCH v3 9/9] KVM: i386: Remove VMX migration blocker Liran Alon
2019-06-18 22:17   ` [Qemu-devel] " Maran Wilson

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