Merge tag 'pull-target-arm-20231219' of https://git.linaro.org/people/pmaydell/qemu-arm into staging

target-arm queue:
 * arm/kvm: drop the split between "common KVM support" and
   "64-bit KVM support", since 32-bit Arm KVM no longer exists
 * arm/kvm: clean up APIs to be consistent about CPU arguments
 * Don't implement *32_EL2 registers when EL1 is AArch64 only
 * Restrict DC CVAP & DC CVADP instructions to TCG accel
 * Restrict TCG specific helpers
 * Propagate MDCR_EL2.HPMN into PMCR_EL0.N
 * Include missing 'exec/exec-all.h' header
 * fsl-imx: add simple RTC emulation for i.MX6 and i.MX7 boards

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# gpg: Signature made Tue 19 Dec 2023 14:10:05 EST
# gpg:                using RSA key E1A5C593CD419DE28E8315CF3C2525ED14360CDE
# gpg:                issuer "peter.maydell@linaro.org"
# gpg: Good signature from "Peter Maydell <peter.maydell@linaro.org>" [full]
# gpg:                 aka "Peter Maydell <pmaydell@gmail.com>" [full]
# gpg:                 aka "Peter Maydell <pmaydell@chiark.greenend.org.uk>" [full]
# gpg:                 aka "Peter Maydell <peter@archaic.org.uk>" [unknown]
# Primary key fingerprint: E1A5 C593 CD41 9DE2 8E83  15CF 3C25 25ED 1436 0CDE

* tag 'pull-target-arm-20231219' of https://git.linaro.org/people/pmaydell/qemu-arm: (43 commits)
  fsl-imx: add simple RTC emulation for i.MX6 and i.MX7 boards
  target/arm/helper: Propagate MDCR_EL2.HPMN into PMCR_EL0.N
  target/arm/tcg: Including missing 'exec/exec-all.h' header
  target/arm: Restrict DC CVAP & DC CVADP instructions to TCG accel
  target/arm: Restrict TCG specific helpers
  target/arm: Don't implement *32_EL2 registers when EL1 is AArch64 only
  target/arm/kvm: Have kvm_arm_hw_debug_active take a ARMCPU argument
  target/arm/kvm: Have kvm_arm_handle_debug take a ARMCPU argument
  target/arm/kvm: Have kvm_arm_handle_dabt_nisv take a ARMCPU argument
  target/arm/kvm: Have kvm_arm_verify_ext_dabt_pending take a ARMCPU arg
  target/arm/kvm: Have kvm_arm_[get|put]_virtual_time take ARMCPU argument
  target/arm/kvm: Have kvm_arm_vcpu_finalize take a ARMCPU argument
  target/arm/kvm: Have kvm_arm_vcpu_init take a ARMCPU argument
  target/arm/kvm: Have kvm_arm_pmu_set_irq take a ARMCPU argument
  target/arm/kvm: Have kvm_arm_pmu_init take a ARMCPU argument
  target/arm/kvm: Have kvm_arm_pvtime_init take a ARMCPU argument
  target/arm/kvm: Have kvm_arm_set_device_attr take a ARMCPU argument
  target/arm/kvm: Have kvm_arm_sve_get_vls take a ARMCPU argument
  target/arm/kvm: Have kvm_arm_sve_set_vls take a ARMCPU argument
  target/arm/kvm: Have kvm_arm_add_vcpu_properties take a ARMCPU argument
  ...

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>

1 files changed, 86 insertions, 7 deletions

diff --git a/hw/misc/imx7_snvs.c b/hw/misc/imx7_snvs.c
index a245f96cd4..8e7f43187f 100644
--- a/hw/misc/imx7_snvs.c
+++ b/hw/misc/imx7_snvs.c
@@ -13,28 +13,100 @@
  */
 
 #include "qemu/osdep.h"
+#include "qemu/bitops.h"
+#include "qemu/timer.h"
+#include "migration/vmstate.h"
 #include "hw/misc/imx7_snvs.h"
+#include "qemu/cutils.h"
 #include "qemu/module.h"
+#include "sysemu/sysemu.h"
+#include "sysemu/rtc.h"
 #include "sysemu/runstate.h"
 #include "trace.h"
 
+#define RTC_FREQ    32768ULL
+
+static const VMStateDescription vmstate_imx7_snvs = {
+    .name = TYPE_IMX7_SNVS,
+    .version_id = 1,
+    .minimum_version_id = 1,
+    .fields = (VMStateField[]) {
+        VMSTATE_UINT64(tick_offset, IMX7SNVSState),
+        VMSTATE_UINT64(lpcr, IMX7SNVSState),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+static uint64_t imx7_snvs_get_count(IMX7SNVSState *s)
+{
+    uint64_t ticks = muldiv64(qemu_clock_get_ns(rtc_clock), RTC_FREQ,
+                              NANOSECONDS_PER_SECOND);
+    return s->tick_offset + ticks;
+}
+
 static uint64_t imx7_snvs_read(void *opaque, hwaddr offset, unsigned size)
 {
-    trace_imx7_snvs_read(offset, 0);
+    IMX7SNVSState *s = IMX7_SNVS(opaque);
+    uint64_t ret = 0;
+
+    switch (offset) {
+    case SNVS_LPSRTCMR:
+        ret = extract64(imx7_snvs_get_count(s), 32, 15);
+        break;
+    case SNVS_LPSRTCLR:
+        ret = extract64(imx7_snvs_get_count(s), 0, 32);
+        break;
+    case SNVS_LPCR:
+        ret = s->lpcr;
+        break;
+    }
 
-    return 0;
+    trace_imx7_snvs_read(offset, ret, size);
+
+    return ret;
+}
+
+static void imx7_snvs_reset(DeviceState *dev)
+{
+    IMX7SNVSState *s = IMX7_SNVS(dev);
+
+    s->lpcr = 0;
 }
 
 static void imx7_snvs_write(void *opaque, hwaddr offset,
                             uint64_t v, unsigned size)
 {
-    const uint32_t value = v;
-    const uint32_t mask  = SNVS_LPCR_TOP | SNVS_LPCR_DP_EN;
+    trace_imx7_snvs_write(offset, v, size);
+
+    IMX7SNVSState *s = IMX7_SNVS(opaque);
 
-    trace_imx7_snvs_write(offset, value);
+    uint64_t new_value = 0, snvs_count = 0;
 
-    if (offset == SNVS_LPCR && ((value & mask) == mask)) {
-        qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
+    if (offset == SNVS_LPSRTCMR || offset == SNVS_LPSRTCLR) {
+        snvs_count = imx7_snvs_get_count(s);
+    }
+
+    switch (offset) {
+    case SNVS_LPSRTCMR:
+        new_value = deposit64(snvs_count, 32, 32, v);
+        break;
+    case SNVS_LPSRTCLR:
+        new_value = deposit64(snvs_count, 0, 32, v);
+        break;
+    case SNVS_LPCR: {
+        s->lpcr = v;
+
+        const uint32_t mask  = SNVS_LPCR_TOP | SNVS_LPCR_DP_EN;
+
+        if ((v & mask) == mask) {
+            qemu_system_shutdown_request(SHUTDOWN_CAUSE_GUEST_SHUTDOWN);
+        }
+        break;
+    }
+    }
+
+    if (offset == SNVS_LPSRTCMR || offset == SNVS_LPSRTCLR) {
+        s->tick_offset += new_value - snvs_count;
     }
 }
 
@@ -59,17 +131,24 @@ static void imx7_snvs_init(Object *obj)
 {
     SysBusDevice *sd = SYS_BUS_DEVICE(obj);
     IMX7SNVSState *s = IMX7_SNVS(obj);
+    struct tm tm;
 
     memory_region_init_io(&s->mmio, obj, &imx7_snvs_ops, s,
                           TYPE_IMX7_SNVS, 0x1000);
 
     sysbus_init_mmio(sd, &s->mmio);
+
+    qemu_get_timedate(&tm, 0);
+    s->tick_offset = mktimegm(&tm) -
+        qemu_clock_get_ns(rtc_clock) / NANOSECONDS_PER_SECOND;
 }
 
 static void imx7_snvs_class_init(ObjectClass *klass, void *data)
 {
     DeviceClass *dc = DEVICE_CLASS(klass);
 
+    dc->reset = imx7_snvs_reset;
+    dc->vmsd = &vmstate_imx7_snvs;
     dc->desc  = "i.MX7 Secure Non-Volatile Storage Module";
 }