#
ptp-y := ptp_clock.o ptp_chardev.o ptp_sysfs.o
+ptp_kvm-$(CONFIG_X86) := ptp_kvm_x86.o ptp_kvm_common.o
obj-$(CONFIG_PTP_1588_CLOCK) += ptp.o
obj-$(CONFIG_PTP_1588_CLOCK_DTE) += ptp_dte.o
obj-$(CONFIG_PTP_1588_CLOCK_INES) += ptp_ines.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Virtual PTP 1588 clock for use with KVM guests
- *
- * Copyright (C) 2017 Red Hat Inc.
- */
-#include <linux/device.h>
-#include <linux/err.h>
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <uapi/linux/kvm_para.h>
-#include <asm/kvm_para.h>
-#include <asm/pvclock.h>
-#include <asm/kvmclock.h>
-#include <uapi/asm/kvm_para.h>
-
-#include <linux/ptp_clock_kernel.h>
-
-struct kvm_ptp_clock {
- struct ptp_clock *ptp_clock;
- struct ptp_clock_info caps;
-};
-
-static DEFINE_SPINLOCK(kvm_ptp_lock);
-
-static struct pvclock_vsyscall_time_info *hv_clock;
-
-static struct kvm_clock_pairing clock_pair;
-static phys_addr_t clock_pair_gpa;
-
-static int ptp_kvm_get_time_fn(ktime_t *device_time,
- struct system_counterval_t *system_counter,
- void *ctx)
-{
- unsigned long ret;
- struct timespec64 tspec;
- unsigned version;
- int cpu;
- struct pvclock_vcpu_time_info *src;
-
- spin_lock(&kvm_ptp_lock);
-
- preempt_disable_notrace();
- cpu = smp_processor_id();
- src = &hv_clock[cpu].pvti;
-
- do {
- /*
- * We are using a TSC value read in the hosts
- * kvm_hc_clock_pairing handling.
- * So any changes to tsc_to_system_mul
- * and tsc_shift or any other pvclock
- * data invalidate that measurement.
- */
- version = pvclock_read_begin(src);
-
- ret = kvm_hypercall2(KVM_HC_CLOCK_PAIRING,
- clock_pair_gpa,
- KVM_CLOCK_PAIRING_WALLCLOCK);
- if (ret != 0) {
- pr_err_ratelimited("clock pairing hypercall ret %lu\n", ret);
- spin_unlock(&kvm_ptp_lock);
- preempt_enable_notrace();
- return -EOPNOTSUPP;
- }
-
- tspec.tv_sec = clock_pair.sec;
- tspec.tv_nsec = clock_pair.nsec;
- ret = __pvclock_read_cycles(src, clock_pair.tsc);
- } while (pvclock_read_retry(src, version));
-
- preempt_enable_notrace();
-
- system_counter->cycles = ret;
- system_counter->cs = &kvm_clock;
-
- *device_time = timespec64_to_ktime(tspec);
-
- spin_unlock(&kvm_ptp_lock);
-
- return 0;
-}
-
-static int ptp_kvm_getcrosststamp(struct ptp_clock_info *ptp,
- struct system_device_crosststamp *xtstamp)
-{
- return get_device_system_crosststamp(ptp_kvm_get_time_fn, NULL,
- NULL, xtstamp);
-}
-
-/*
- * PTP clock operations
- */
-
-static int ptp_kvm_adjfreq(struct ptp_clock_info *ptp, s32 ppb)
-{
- return -EOPNOTSUPP;
-}
-
-static int ptp_kvm_adjtime(struct ptp_clock_info *ptp, s64 delta)
-{
- return -EOPNOTSUPP;
-}
-
-static int ptp_kvm_settime(struct ptp_clock_info *ptp,
- const struct timespec64 *ts)
-{
- return -EOPNOTSUPP;
-}
-
-static int ptp_kvm_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts)
-{
- unsigned long ret;
- struct timespec64 tspec;
-
- spin_lock(&kvm_ptp_lock);
-
- ret = kvm_hypercall2(KVM_HC_CLOCK_PAIRING,
- clock_pair_gpa,
- KVM_CLOCK_PAIRING_WALLCLOCK);
- if (ret != 0) {
- pr_err_ratelimited("clock offset hypercall ret %lu\n", ret);
- spin_unlock(&kvm_ptp_lock);
- return -EOPNOTSUPP;
- }
-
- tspec.tv_sec = clock_pair.sec;
- tspec.tv_nsec = clock_pair.nsec;
- spin_unlock(&kvm_ptp_lock);
-
- memcpy(ts, &tspec, sizeof(struct timespec64));
-
- return 0;
-}
-
-static int ptp_kvm_enable(struct ptp_clock_info *ptp,
- struct ptp_clock_request *rq, int on)
-{
- return -EOPNOTSUPP;
-}
-
-static const struct ptp_clock_info ptp_kvm_caps = {
- .owner = THIS_MODULE,
- .name = "KVM virtual PTP",
- .max_adj = 0,
- .n_ext_ts = 0,
- .n_pins = 0,
- .pps = 0,
- .adjfreq = ptp_kvm_adjfreq,
- .adjtime = ptp_kvm_adjtime,
- .gettime64 = ptp_kvm_gettime,
- .settime64 = ptp_kvm_settime,
- .enable = ptp_kvm_enable,
- .getcrosststamp = ptp_kvm_getcrosststamp,
-};
-
-/* module operations */
-
-static struct kvm_ptp_clock kvm_ptp_clock;
-
-static void __exit ptp_kvm_exit(void)
-{
- ptp_clock_unregister(kvm_ptp_clock.ptp_clock);
-}
-
-static int __init ptp_kvm_init(void)
-{
- long ret;
-
- if (!kvm_para_available())
- return -ENODEV;
-
- clock_pair_gpa = slow_virt_to_phys(&clock_pair);
- hv_clock = pvclock_get_pvti_cpu0_va();
-
- if (!hv_clock)
- return -ENODEV;
-
- ret = kvm_hypercall2(KVM_HC_CLOCK_PAIRING, clock_pair_gpa,
- KVM_CLOCK_PAIRING_WALLCLOCK);
- if (ret == -KVM_ENOSYS || ret == -KVM_EOPNOTSUPP)
- return -ENODEV;
-
- kvm_ptp_clock.caps = ptp_kvm_caps;
-
- kvm_ptp_clock.ptp_clock = ptp_clock_register(&kvm_ptp_clock.caps, NULL);
-
- return PTR_ERR_OR_ZERO(kvm_ptp_clock.ptp_clock);
-}
-
-module_init(ptp_kvm_init);
-module_exit(ptp_kvm_exit);
-
-MODULE_AUTHOR("Marcelo Tosatti <mtosatti@redhat.com>");
-MODULE_DESCRIPTION("PTP clock using KVMCLOCK");
-MODULE_LICENSE("GPL");
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Virtual PTP 1588 clock for use with KVM guests
+ *
+ * Copyright (C) 2017 Red Hat Inc.
+ */
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/module.h>
+#include <linux/ptp_kvm.h>
+#include <uapi/linux/kvm_para.h>
+#include <asm/kvm_para.h>
+#include <uapi/asm/kvm_para.h>
+
+#include <linux/ptp_clock_kernel.h>
+
+struct kvm_ptp_clock {
+ struct ptp_clock *ptp_clock;
+ struct ptp_clock_info caps;
+};
+
+static DEFINE_SPINLOCK(kvm_ptp_lock);
+
+static int ptp_kvm_get_time_fn(ktime_t *device_time,
+ struct system_counterval_t *system_counter,
+ void *ctx)
+{
+ long ret;
+ u64 cycle;
+ struct timespec64 tspec;
+ struct clocksource *cs;
+
+ spin_lock(&kvm_ptp_lock);
+
+ preempt_disable_notrace();
+ ret = kvm_arch_ptp_get_crosststamp(&cycle, &tspec, &cs);
+ if (ret) {
+ spin_unlock(&kvm_ptp_lock);
+ preempt_enable_notrace();
+ return ret;
+ }
+
+ preempt_enable_notrace();
+
+ system_counter->cycles = cycle;
+ system_counter->cs = cs;
+
+ *device_time = timespec64_to_ktime(tspec);
+
+ spin_unlock(&kvm_ptp_lock);
+
+ return 0;
+}
+
+static int ptp_kvm_getcrosststamp(struct ptp_clock_info *ptp,
+ struct system_device_crosststamp *xtstamp)
+{
+ return get_device_system_crosststamp(ptp_kvm_get_time_fn, NULL,
+ NULL, xtstamp);
+}
+
+/*
+ * PTP clock operations
+ */
+
+static int ptp_kvm_adjfreq(struct ptp_clock_info *ptp, s32 ppb)
+{
+ return -EOPNOTSUPP;
+}
+
+static int ptp_kvm_adjtime(struct ptp_clock_info *ptp, s64 delta)
+{
+ return -EOPNOTSUPP;
+}
+
+static int ptp_kvm_settime(struct ptp_clock_info *ptp,
+ const struct timespec64 *ts)
+{
+ return -EOPNOTSUPP;
+}
+
+static int ptp_kvm_gettime(struct ptp_clock_info *ptp, struct timespec64 *ts)
+{
+ long ret;
+ struct timespec64 tspec;
+
+ spin_lock(&kvm_ptp_lock);
+
+ ret = kvm_arch_ptp_get_clock(&tspec);
+ if (ret) {
+ spin_unlock(&kvm_ptp_lock);
+ return ret;
+ }
+
+ spin_unlock(&kvm_ptp_lock);
+
+ memcpy(ts, &tspec, sizeof(struct timespec64));
+
+ return 0;
+}
+
+static int ptp_kvm_enable(struct ptp_clock_info *ptp,
+ struct ptp_clock_request *rq, int on)
+{
+ return -EOPNOTSUPP;
+}
+
+static const struct ptp_clock_info ptp_kvm_caps = {
+ .owner = THIS_MODULE,
+ .name = "KVM virtual PTP",
+ .max_adj = 0,
+ .n_ext_ts = 0,
+ .n_pins = 0,
+ .pps = 0,
+ .adjfreq = ptp_kvm_adjfreq,
+ .adjtime = ptp_kvm_adjtime,
+ .gettime64 = ptp_kvm_gettime,
+ .settime64 = ptp_kvm_settime,
+ .enable = ptp_kvm_enable,
+ .getcrosststamp = ptp_kvm_getcrosststamp,
+};
+
+/* module operations */
+
+static struct kvm_ptp_clock kvm_ptp_clock;
+
+static void __exit ptp_kvm_exit(void)
+{
+ ptp_clock_unregister(kvm_ptp_clock.ptp_clock);
+}
+
+static int __init ptp_kvm_init(void)
+{
+ long ret;
+
+ ret = kvm_arch_ptp_init();
+ if (ret) {
+ pr_err("fail to initialize ptp_kvm");
+ return ret;
+ }
+
+ kvm_ptp_clock.caps = ptp_kvm_caps;
+
+ kvm_ptp_clock.ptp_clock = ptp_clock_register(&kvm_ptp_clock.caps, NULL);
+
+ return PTR_ERR_OR_ZERO(kvm_ptp_clock.ptp_clock);
+}
+
+module_init(ptp_kvm_init);
+module_exit(ptp_kvm_exit);
+
+MODULE_AUTHOR("Marcelo Tosatti <mtosatti@redhat.com>");
+MODULE_DESCRIPTION("PTP clock using KVMCLOCK");
+MODULE_LICENSE("GPL");
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Virtual PTP 1588 clock for use with KVM guests
+ *
+ * Copyright (C) 2017 Red Hat Inc.
+ */
+
+#include <linux/device.h>
+#include <linux/kernel.h>
+#include <asm/pvclock.h>
+#include <asm/kvmclock.h>
+#include <linux/module.h>
+#include <uapi/asm/kvm_para.h>
+#include <uapi/linux/kvm_para.h>
+#include <linux/ptp_clock_kernel.h>
+#include <linux/ptp_kvm.h>
+
+struct pvclock_vsyscall_time_info *hv_clock;
+
+static phys_addr_t clock_pair_gpa;
+static struct kvm_clock_pairing clock_pair;
+
+int kvm_arch_ptp_init(void)
+{
+ long ret;
+
+ if (!kvm_para_available())
+ return -ENODEV;
+
+ clock_pair_gpa = slow_virt_to_phys(&clock_pair);
+ hv_clock = pvclock_get_pvti_cpu0_va();
+ if (!hv_clock)
+ return -ENODEV;
+
+ ret = kvm_hypercall2(KVM_HC_CLOCK_PAIRING, clock_pair_gpa,
+ KVM_CLOCK_PAIRING_WALLCLOCK);
+ if (ret == -KVM_ENOSYS || ret == -KVM_EOPNOTSUPP)
+ return -ENODEV;
+
+ return 0;
+}
+
+int kvm_arch_ptp_get_clock(struct timespec64 *ts)
+{
+ long ret;
+
+ ret = kvm_hypercall2(KVM_HC_CLOCK_PAIRING,
+ clock_pair_gpa,
+ KVM_CLOCK_PAIRING_WALLCLOCK);
+ if (ret != 0) {
+ pr_err_ratelimited("clock offset hypercall ret %lu\n", ret);
+ return -EOPNOTSUPP;
+ }
+
+ ts->tv_sec = clock_pair.sec;
+ ts->tv_nsec = clock_pair.nsec;
+
+ return 0;
+}
+
+int kvm_arch_ptp_get_crosststamp(u64 *cycle, struct timespec64 *tspec,
+ struct clocksource **cs)
+{
+ struct pvclock_vcpu_time_info *src;
+ unsigned int version;
+ long ret;
+ int cpu;
+
+ cpu = smp_processor_id();
+ src = &hv_clock[cpu].pvti;
+
+ do {
+ /*
+ * We are using a TSC value read in the hosts
+ * kvm_hc_clock_pairing handling.
+ * So any changes to tsc_to_system_mul
+ * and tsc_shift or any other pvclock
+ * data invalidate that measurement.
+ */
+ version = pvclock_read_begin(src);
+
+ ret = kvm_hypercall2(KVM_HC_CLOCK_PAIRING,
+ clock_pair_gpa,
+ KVM_CLOCK_PAIRING_WALLCLOCK);
+ if (ret != 0) {
+ pr_err_ratelimited("clock pairing hypercall ret %lu\n", ret);
+ return -EOPNOTSUPP;
+ }
+ tspec->tv_sec = clock_pair.sec;
+ tspec->tv_nsec = clock_pair.nsec;
+ *cycle = __pvclock_read_cycles(src, clock_pair.tsc);
+ } while (pvclock_read_retry(src, version));
+
+ *cs = &kvm_clock;
+
+ return 0;
+}
--- /dev/null
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Virtual PTP 1588 clock for use with KVM guests
+ *
+ * Copyright (C) 2017 Red Hat Inc.
+ */
+
+#ifndef _PTP_KVM_H_
+#define _PTP_KVM_H_
+
+struct timespec64;
+struct clocksource;
+
+int kvm_arch_ptp_init(void);
+int kvm_arch_ptp_get_clock(struct timespec64 *ts);
+int kvm_arch_ptp_get_crosststamp(u64 *cycle,
+ struct timespec64 *tspec, struct clocksource **cs);
+
+#endif /* _PTP_KVM_H_ */
projects / linux-2.6-microblaze.git / commitdiff