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diff --git a/arch/x86/kvm/Makefile b/arch/x86/kvm/Makefile
index b804444e16d4..c94f8c4460f1 100644
--- a/arch/x86/kvm/Makefile
+++ b/arch/x86/kvm/Makefile
@@ -10,7 +10,9 @@ endif
KVM := ../../../virt/kvm
kvm-y += $(KVM)/kvm_main.o $(KVM)/coalesced_mmio.o \
- $(KVM)/eventfd.o $(KVM)/irqchip.o $(KVM)/vfio.o
+ $(KVM)/eventfd.o $(KVM)/irqchip.o $(KVM)/vfio.o \
+ svm/cachepc/cachepc.o svm/cachepc/util.o
+
kvm-$(CONFIG_KVM_ASYNC_PF) += $(KVM)/async_pf.o
kvm-y += x86.o emulate.o i8259.o irq.o lapic.o \
@@ -20,7 +22,8 @@ kvm-y += x86.o emulate.o i8259.o irq.o lapic.o \
kvm-intel-y += vmx/vmx.o vmx/vmenter.o vmx/pmu_intel.o vmx/vmcs12.o \
vmx/evmcs.o vmx/nested.o vmx/posted_intr.o
-kvm-amd-y += svm/svm.o svm/vmenter.o svm/pmu.o svm/nested.o svm/avic.o svm/sev.o
+kvm-amd-y += svm/svm.o svm/vmenter.o svm/pmu.o svm/nested.o svm/avic.o svm/sev.o \
+ svm/cachepc/cachepc.o svm/cachepc/util.o
obj-$(CONFIG_KVM) += kvm.o
obj-$(CONFIG_KVM_INTEL) += kvm-intel.o
diff --git a/arch/x86/kvm/svm/svm.c b/arch/x86/kvm/svm/svm.c
index 7b3cfbe8f7e3..71697d08e9e4 100644
--- a/arch/x86/kvm/svm/svm.c
+++ b/arch/x86/kvm/svm/svm.c
@@ -2,6 +2,8 @@
#include <linux/kvm_host.h>
+#include "cachepc/cachepc.h"
+
#include "irq.h"
#include "mmu.h"
#include "kvm_cache_regs.h"
@@ -3785,8 +3787,18 @@ static noinstr void svm_vcpu_enter_exit(struct kvm_vcpu *vcpu,
static __no_kcsan fastpath_t svm_vcpu_run(struct kvm_vcpu *vcpu)
{
- struct vcpu_svm *svm = to_svm(vcpu);
+ static struct cache_ctx *ctx = NULL;
+ static struct cacheline *ds = NULL;
+ static struct cacheline *head = NULL;
+ static int run_index = 0;
+ struct vcpu_svm *svm;
+
+ printk(KERN_WARNING "CachePC: svm_cpu_enter_exit()\n");
+
+ if (!ctx) ctx = cachepc_get_ctx(L1);
+ if (!ds) ds = cachepc_prepare_ds(ctx);
+ svm = to_svm(vcpu);
svm->vmcb->save.rax = vcpu->arch.regs[VCPU_REGS_RAX];
svm->vmcb->save.rsp = vcpu->arch.regs[VCPU_REGS_RSP];
svm->vmcb->save.rip = vcpu->arch.regs[VCPU_REGS_RIP];
@@ -3835,8 +3847,14 @@ static __no_kcsan fastpath_t svm_vcpu_run(struct kvm_vcpu *vcpu)
*/
x86_spec_ctrl_set_guest(svm->spec_ctrl, svm->virt_spec_ctrl);
+ head = cachepc_prime(ds);
+
svm_vcpu_enter_exit(vcpu, svm);
+ cachepc_probe(head);
+ //cachepc_print_msrmts(head);
+ cachepc_save_msrmts(head);
+
/*
* We do not use IBRS in the kernel. If this vCPU has used the
* SPEC_CTRL MSR it may have left it on; save the value and
@@ -3912,6 +3930,8 @@ static __no_kcsan fastpath_t svm_vcpu_run(struct kvm_vcpu *vcpu)
if (is_guest_mode(vcpu))
return EXIT_FASTPATH_NONE;
+ run_index += 1;
+
return svm_exit_handlers_fastpath(vcpu);
}
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 2541a17ff1c4..c219a214d904 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -51,6 +51,9 @@
#include <linux/io.h>
#include <linux/lockdep.h>
#include <linux/kthread.h>
+#include <linux/proc_fs.h>
+#include <linux/init.h>
+#include <asm/uaccess.h>
#include <asm/processor.h>
#include <asm/ioctl.h>
@@ -66,6 +69,8 @@
/* Worst case buffer size needed for holding an integer. */
#define ITOA_MAX_LEN 12
+#include "../../arch/x86/kvm/svm/cachepc/cachepc.h"
+
MODULE_AUTHOR("Qumranet");
MODULE_LICENSE("GPL");
@@ -143,6 +148,13 @@ static void hardware_disable_all(void);
static void kvm_io_bus_destroy(struct kvm_io_bus *bus);
+uint8_t *cachepc_msrmts;
+size_t cachepc_msrmts_count;
+struct proc_ops cachepc_proc_ops;
+
+EXPORT_SYMBOL(cachepc_msrmts);
+EXPORT_SYMBOL(cachepc_msrmts_count);
+
__visible bool kvm_rebooting;
EXPORT_SYMBOL_GPL(kvm_rebooting);
@@ -4765,6 +4777,50 @@ static void check_processor_compat(void *data)
*c->ret = kvm_arch_check_processor_compat(c->opaque);
}
+int
+kvm_cachepc_open(struct inode *inode, struct file *file)
+{
+ try_module_get(THIS_MODULE);
+
+ return 0;
+}
+
+int
+kvm_cachepc_close(struct inode *inode, struct file *file)
+{
+ module_put(THIS_MODULE);
+
+ return 0;
+}
+
+ssize_t
+kvm_cachepc_read(struct file *file, char *buf, size_t buflen, loff_t *off)
+{
+ size_t len, left;
+
+ printk(KERN_WARNING "CacheSC: Reading entries (%lu:%lli)\n",
+ buflen, off ? *off : 0);
+
+ if (!off || *off >= cachepc_msrmts_count || *off < 0)
+ return 0;
+
+ len = cachepc_msrmts_count - *off;
+ if (len > buflen) len = buflen;
+
+ left = copy_to_user(buf, cachepc_msrmts + *off, len);
+
+ len -= left;
+ *off += len;
+
+ return len;
+}
+
+ssize_t
+kvm_cachepc_write(struct file *file, const char *buf, size_t buflen, loff_t *off)
+{
+ return 0;
+}
+
int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
struct module *module)
{
@@ -4848,6 +4904,20 @@ int kvm_init(void *opaque, unsigned vcpu_size, unsigned vcpu_align,
r = kvm_vfio_ops_init();
WARN_ON(r);
+ cachepc_init_counters();
+
+ cachepc_msrmts_count = L1_SETS;
+ cachepc_msrmts = kzalloc(cachepc_msrmts_count, GFP_KERNEL);
+ BUG_ON(cachepc_msrmts == NULL);
+
+ memset(&cachepc_proc_ops, 0, sizeof(cachepc_proc_ops));
+ cachepc_proc_ops.proc_open = kvm_cachepc_open;
+ cachepc_proc_ops.proc_read = kvm_cachepc_read;
+ cachepc_proc_ops.proc_write = kvm_cachepc_write;
+ cachepc_proc_ops.proc_release = kvm_cachepc_close;
+
+ proc_create("cachepc", 0644, NULL, &cachepc_proc_ops);
+
return 0;
out_unreg:
@@ -4872,6 +4942,9 @@ EXPORT_SYMBOL_GPL(kvm_init);
void kvm_exit(void)
{
+ remove_proc_entry("cachepc", NULL);
+ kfree(cachepc_msrmts);
+
debugfs_remove_recursive(kvm_debugfs_dir);
misc_deregister(&kvm_dev);
kmem_cache_destroy(kvm_vcpu_cache);
|
