From: "Adalbert Lazăr" <alazar@bitdefender.com>
To: kvm@vger.kernel.org
Cc: virtualization@lists.linux-foundation.org,
"Paolo Bonzini" <pbonzini@redhat.com>,
"Adalbert Lazăr" <alazar@bitdefender.com>,
"Nicușor Cîțu" <ncitu@bitdefender.com>
Subject: [PATCH v9 48/84] KVM: introspection: add a jobs list to every introspected vCPU
Date: Wed, 22 Jul 2020 00:08:46 +0300 [thread overview]
Message-ID: <20200721210922.7646-49-alazar@bitdefender.com> (raw)
In-Reply-To: <20200721210922.7646-1-alazar@bitdefender.com>
Every vCPU has a lock-protected list in which the receiving thread
places the jobs that has to be done by the vCPU thread
once it is kicked out of guest (KVM_REQ_INTROSPECTION).
Co-developed-by: Nicușor Cîțu <ncitu@bitdefender.com>
Signed-off-by: Nicușor Cîțu <ncitu@bitdefender.com>
Signed-off-by: Adalbert Lazăr <alazar@bitdefender.com>
---
include/linux/kvmi_host.h | 10 +++++
virt/kvm/introspection/kvmi.c | 72 ++++++++++++++++++++++++++++++-
virt/kvm/introspection/kvmi_int.h | 1 +
3 files changed, 81 insertions(+), 2 deletions(-)
diff --git a/include/linux/kvmi_host.h b/include/linux/kvmi_host.h
index f96a9a3cfdd4..d3242a99f891 100644
--- a/include/linux/kvmi_host.h
+++ b/include/linux/kvmi_host.h
@@ -6,8 +6,18 @@
#include <asm/kvmi_host.h>
+struct kvmi_job {
+ struct list_head link;
+ void *ctx;
+ void (*fct)(struct kvm_vcpu *vcpu, void *ctx);
+ void (*free_fct)(void *ctx);
+};
+
struct kvm_vcpu_introspection {
struct kvm_vcpu_arch_introspection arch;
+
+ struct list_head job_list;
+ spinlock_t job_lock;
};
struct kvm_introspection {
diff --git a/virt/kvm/introspection/kvmi.c b/virt/kvm/introspection/kvmi.c
index a51e7342f837..b6595bca99f7 100644
--- a/virt/kvm/introspection/kvmi.c
+++ b/virt/kvm/introspection/kvmi.c
@@ -18,6 +18,7 @@ static DECLARE_BITMAP(Kvmi_known_vm_events, KVMI_NUM_EVENTS);
static DECLARE_BITMAP(Kvmi_known_vcpu_events, KVMI_NUM_EVENTS);
static struct kmem_cache *msg_cache;
+static struct kmem_cache *job_cache;
void *kvmi_msg_alloc(void)
{
@@ -34,14 +35,19 @@ static void kvmi_cache_destroy(void)
{
kmem_cache_destroy(msg_cache);
msg_cache = NULL;
+ kmem_cache_destroy(job_cache);
+ job_cache = NULL;
}
static int kvmi_cache_create(void)
{
msg_cache = kmem_cache_create("kvmi_msg", KVMI_MSG_SIZE_ALLOC,
4096, SLAB_ACCOUNT, NULL);
+ job_cache = kmem_cache_create("kvmi_job",
+ sizeof(struct kvmi_job),
+ 0, SLAB_ACCOUNT, NULL);
- if (!msg_cache) {
+ if (!msg_cache || !job_cache) {
kvmi_cache_destroy();
return -1;
@@ -107,6 +113,48 @@ void kvmi_uninit(void)
kvmi_cache_destroy();
}
+static int __kvmi_add_job(struct kvm_vcpu *vcpu,
+ void (*fct)(struct kvm_vcpu *vcpu, void *ctx),
+ void *ctx, void (*free_fct)(void *ctx))
+{
+ struct kvm_vcpu_introspection *vcpui = VCPUI(vcpu);
+ struct kvmi_job *job;
+
+ job = kmem_cache_zalloc(job_cache, GFP_KERNEL);
+ if (unlikely(!job))
+ return -ENOMEM;
+
+ INIT_LIST_HEAD(&job->link);
+ job->fct = fct;
+ job->ctx = ctx;
+ job->free_fct = free_fct;
+
+ spin_lock(&vcpui->job_lock);
+ list_add_tail(&job->link, &vcpui->job_list);
+ spin_unlock(&vcpui->job_lock);
+
+ return 0;
+}
+
+int kvmi_add_job(struct kvm_vcpu *vcpu,
+ void (*fct)(struct kvm_vcpu *vcpu, void *ctx),
+ void *ctx, void (*free_fct)(void *ctx))
+{
+ int err;
+
+ err = __kvmi_add_job(vcpu, fct, ctx, free_fct);
+
+ return err;
+}
+
+static void kvmi_free_job(struct kvmi_job *job)
+{
+ if (job->free_fct)
+ job->free_fct(job->ctx);
+
+ kmem_cache_free(job_cache, job);
+}
+
static bool alloc_vcpui(struct kvm_vcpu *vcpu)
{
struct kvm_vcpu_introspection *vcpui;
@@ -115,6 +163,9 @@ static bool alloc_vcpui(struct kvm_vcpu *vcpu)
if (!vcpui)
return false;
+ INIT_LIST_HEAD(&vcpui->job_list);
+ spin_lock_init(&vcpui->job_lock);
+
vcpu->kvmi = vcpui;
return true;
@@ -128,9 +179,26 @@ static int create_vcpui(struct kvm_vcpu *vcpu)
return 0;
}
+static void free_vcpu_jobs(struct kvm_vcpu_introspection *vcpui)
+{
+ struct kvmi_job *cur, *next;
+
+ list_for_each_entry_safe(cur, next, &vcpui->job_list, link) {
+ list_del(&cur->link);
+ kvmi_free_job(cur);
+ }
+}
+
static void free_vcpui(struct kvm_vcpu *vcpu)
{
- kfree(vcpu->kvmi);
+ struct kvm_vcpu_introspection *vcpui = VCPUI(vcpu);
+
+ if (!vcpui)
+ return;
+
+ free_vcpu_jobs(vcpui);
+
+ kfree(vcpui);
vcpu->kvmi = NULL;
}
diff --git a/virt/kvm/introspection/kvmi_int.h b/virt/kvm/introspection/kvmi_int.h
index 40e8647a6fd4..ceed50722dc1 100644
--- a/virt/kvm/introspection/kvmi_int.h
+++ b/virt/kvm/introspection/kvmi_int.h
@@ -19,6 +19,7 @@
kvm_info("%pU ERROR: " fmt, &kvmi->uuid, ## __VA_ARGS__)
#define KVMI(kvm) ((kvm)->kvmi)
+#define VCPUI(vcpu) ((vcpu)->kvmi)
/* kvmi_msg.c */
bool kvmi_sock_get(struct kvm_introspection *kvmi, int fd);
next prev parent reply other threads:[~2020-07-21 21:08 UTC|newest]
Thread overview: 88+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-21 21:07 [PATCH v9 00/84] VM introspection Adalbert Lazăr
2020-07-21 21:07 ` [PATCH v9 01/84] signal: export kill_pid_info() Adalbert Lazăr
2020-07-22 6:36 ` Christoph Hellwig
2020-07-21 21:08 ` [PATCH v9 02/84] KVM: UAPI: add error codes used by the VM introspection code Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 03/84] KVM: add kvm_vcpu_kick_and_wait() Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 04/84] KVM: add kvm_get_max_gfn() Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 05/84] KVM: doc: fix the hypercall numbering Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 06/84] KVM: x86: add kvm_arch_vcpu_get_regs() and kvm_arch_vcpu_get_sregs() Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 07/84] KVM: x86: add kvm_arch_vcpu_set_regs() Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 08/84] KVM: x86: avoid injecting #PF when emulate the VMCALL instruction Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 09/84] KVM: x86: add .bp_intercepted() to struct kvm_x86_ops Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 10/84] KVM: x86: add .control_cr3_intercept() " Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 11/84] KVM: x86: add .cr3_write_intercepted() Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 12/84] KVM: x86: add .desc_ctrl_supported() Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 13/84] KVM: svm: add support for descriptor-table exits Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 14/84] KVM: x86: add .control_desc_intercept() Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 15/84] KVM: x86: add .desc_intercepted() Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 16/84] KVM: x86: export .msr_write_intercepted() Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 17/84] KVM: x86: use MSR_TYPE_R, MSR_TYPE_W and MSR_TYPE_RW with AMD Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 18/84] KVM: svm: pass struct kvm_vcpu to set_msr_interception() Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 19/84] KVM: vmx: pass struct kvm_vcpu to the intercept msr related functions Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 20/84] KVM: x86: add .control_msr_intercept() Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 21/84] KVM: x86: vmx: use a symbolic constant when checking the exit qualifications Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 22/84] KVM: x86: save the error code during EPT/NPF exits handling Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 23/84] KVM: x86: add .fault_gla() Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 24/84] KVM: x86: add .spt_fault() Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 25/84] KVM: x86: add .gpt_translation_fault() Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 26/84] KVM: x86: add .control_singlestep() Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 27/84] KVM: x86: export kvm_arch_vcpu_set_guest_debug() Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 28/84] KVM: x86: extend kvm_mmu_gva_to_gpa_system() with the 'access' parameter Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 29/84] KVM: x86: export kvm_inject_pending_exception() Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 30/84] KVM: x86: export kvm_vcpu_ioctl_x86_get_xsave() Adalbert Lazăr
2020-07-22 1:31 ` kernel test robot
2020-07-21 21:08 ` [PATCH v9 31/84] KVM: x86: export kvm_vcpu_ioctl_x86_set_xsave() Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 32/84] KVM: x86: page track: provide all callbacks with the guest virtual address Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 33/84] KVM: x86: page track: add track_create_slot() callback Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 34/84] KVM: x86: page_track: add support for preread, prewrite and preexec Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 35/84] KVM: x86: wire in the preread/prewrite/preexec page trackers Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 36/84] KVM: x86: disable gpa_available optimization for fetch and page-walk SPT violations Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 37/84] KVM: introduce VM introspection Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 38/84] KVM: introspection: add hook/unhook ioctls Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 39/84] KVM: introspection: add permission access ioctls Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 40/84] KVM: introspection: add the read/dispatch message function Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 41/84] KVM: introspection: add KVMI_GET_VERSION Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 42/84] KVM: introspection: add KVMI_VM_CHECK_COMMAND and KVMI_VM_CHECK_EVENT Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 43/84] KVM: introspection: add KVMI_VM_GET_INFO Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 44/84] KVM: introspection: add KVMI_EVENT_UNHOOK Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 45/84] KVM: introspection: add KVMI_VM_CONTROL_EVENTS Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 46/84] KVM: introspection: add KVMI_VM_READ_PHYSICAL/KVMI_VM_WRITE_PHYSICAL Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 47/84] KVM: introspection: add vCPU related data Adalbert Lazăr
2020-07-21 21:08 ` Adalbert Lazăr [this message]
2020-07-21 21:08 ` [PATCH v9 49/84] KVM: introspection: handle vCPU introspection requests Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 50/84] KVM: introspection: handle vCPU commands Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 51/84] KVM: introspection: add KVMI_VCPU_GET_INFO Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 52/84] KVM: introspection: add KVMI_VCPU_PAUSE Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 53/84] KVM: introspection: add KVMI_EVENT_PAUSE_VCPU Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 54/84] KVM: introspection: add the crash action handling on the event reply Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 55/84] KVM: introspection: add KVMI_VCPU_CONTROL_EVENTS Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 56/84] KVM: introspection: add KVMI_VCPU_GET_REGISTERS Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 57/84] KVM: introspection: add KVMI_VCPU_SET_REGISTERS Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 58/84] KVM: introspection: add KVMI_VCPU_GET_CPUID Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 59/84] KVM: introspection: add KVMI_EVENT_HYPERCALL Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 60/84] KVM: introspection: add KVMI_EVENT_BREAKPOINT Adalbert Lazăr
2020-07-21 21:08 ` [PATCH v9 61/84] KVM: introspection: add cleanup support for vCPUs Adalbert Lazăr
2020-07-21 21:09 ` [PATCH v9 62/84] KVM: introspection: restore the state of #BP interception on unhook Adalbert Lazăr
2020-07-21 21:09 ` [PATCH v9 63/84] KVM: introspection: add KVMI_VM_CONTROL_CLEANUP Adalbert Lazăr
2020-07-21 21:09 ` [PATCH v9 64/84] KVM: introspection: add KVMI_VCPU_CONTROL_CR and KVMI_EVENT_CR Adalbert Lazăr
2020-07-21 21:09 ` [PATCH v9 65/84] KVM: introspection: restore the state of CR3 interception on unhook Adalbert Lazăr
2020-07-21 21:09 ` [PATCH v9 66/84] KVM: introspection: add KVMI_VCPU_INJECT_EXCEPTION + KVMI_EVENT_TRAP Adalbert Lazăr
2020-07-21 21:09 ` [PATCH v9 67/84] KVM: introspection: add KVMI_VM_GET_MAX_GFN Adalbert Lazăr
2020-07-21 21:09 ` [PATCH v9 68/84] KVM: introspection: add KVMI_EVENT_XSETBV Adalbert Lazăr
2020-07-21 21:09 ` [PATCH v9 69/84] KVM: introspection: add KVMI_VCPU_GET_XCR Adalbert Lazăr
2020-07-22 8:25 ` kernel test robot
2020-07-21 21:09 ` [PATCH v9 70/84] KVM: introspection: add KVMI_VCPU_GET_XSAVE Adalbert Lazăr
2020-07-21 21:09 ` [PATCH v9 71/84] KVM: introspection: add KVMI_VCPU_SET_XSAVE Adalbert Lazăr
2020-07-21 21:09 ` [PATCH v9 72/84] KVM: introspection: add KVMI_VCPU_GET_MTRR_TYPE Adalbert Lazăr
2020-07-21 21:09 ` [PATCH v9 73/84] KVM: introspection: add KVMI_EVENT_DESCRIPTOR Adalbert Lazăr
2020-07-21 21:09 ` [PATCH v9 74/84] KVM: introspection: restore the state of descriptor-table register interception on unhook Adalbert Lazăr
2020-07-21 21:09 ` [PATCH v9 75/84] KVM: introspection: add KVMI_VCPU_CONTROL_MSR and KVMI_EVENT_MSR Adalbert Lazăr
2020-07-21 21:09 ` [PATCH v9 76/84] KVM: introspection: restore the state of MSR interception on unhook Adalbert Lazăr
2020-07-21 21:09 ` [PATCH v9 77/84] KVM: introspection: add KVMI_VM_SET_PAGE_ACCESS Adalbert Lazăr
2020-07-21 21:09 ` [PATCH v9 78/84] KVM: introspection: add KVMI_EVENT_PF Adalbert Lazăr
2020-07-21 21:09 ` [PATCH v9 79/84] KVM: introspection: extend KVMI_GET_VERSION with struct kvmi_features Adalbert Lazăr
2020-07-21 21:09 ` [PATCH v9 80/84] KVM: introspection: add KVMI_VCPU_CONTROL_SINGLESTEP Adalbert Lazăr
2020-07-21 21:09 ` [PATCH v9 81/84] KVM: introspection: add KVMI_EVENT_SINGLESTEP Adalbert Lazăr
2020-07-21 21:09 ` [PATCH v9 82/84] KVM: introspection: add KVMI_VCPU_TRANSLATE_GVA Adalbert Lazăr
2020-07-21 21:09 ` [PATCH v9 83/84] KVM: introspection: emulate a guest page table walk on SPT violations due to A/D bit updates Adalbert Lazăr
2020-07-21 21:09 ` [PATCH v9 84/84] KVM: x86: call the page tracking code on emulation failure Adalbert Lazăr
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