Message ID | 20220110051606.4031241-1-alistair.francis@opensource.wdc.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show |
Series | hw: timer: ibex_timer: Fixup reading w/o register | expand |
On Mon, Jan 10, 2022 at 1:16 PM Alistair Francis <alistair.francis@opensource.wdc.com> wrote: > > From: Wilfred Mallawa <wilfred.mallawa@wdc.com> > > This change fixes a bug where a write only register is read. > As per https://docs.opentitan.org/hw/ip/rv_timer/doc/#register-table > the 'INTR_TEST0' register is write only. > > Signed-off-by: Wilfred Mallawa <wilfred.mallawa@wdc.com> > --- > hw/timer/ibex_timer.c | 14 +++++--------- > include/hw/timer/ibex_timer.h | 1 - > 2 files changed, 5 insertions(+), 10 deletions(-) > Reviewed-by: Bin Meng <bmeng.cn@gmail.com>
On Mon, Jan 10, 2022 at 3:16 PM Alistair Francis <alistair.francis@opensource.wdc.com> wrote: > > From: Wilfred Mallawa <wilfred.mallawa@wdc.com> > > This change fixes a bug where a write only register is read. > As per https://docs.opentitan.org/hw/ip/rv_timer/doc/#register-table > the 'INTR_TEST0' register is write only. > > Signed-off-by: Wilfred Mallawa <wilfred.mallawa@wdc.com> Thanks for the patch! Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Alistair > --- > hw/timer/ibex_timer.c | 14 +++++--------- > include/hw/timer/ibex_timer.h | 1 - > 2 files changed, 5 insertions(+), 10 deletions(-) > > diff --git a/hw/timer/ibex_timer.c b/hw/timer/ibex_timer.c > index 66e1f8e48c..826c38b653 100644 > --- a/hw/timer/ibex_timer.c > +++ b/hw/timer/ibex_timer.c > @@ -130,7 +130,6 @@ static void ibex_timer_reset(DeviceState *dev) > s->timer_compare_upper0 = 0xFFFFFFFF; > s->timer_intr_enable = 0x00000000; > s->timer_intr_state = 0x00000000; > - s->timer_intr_test = 0x00000000; > > ibex_timer_update_irqs(s); > } > @@ -168,7 +167,8 @@ static uint64_t ibex_timer_read(void *opaque, hwaddr addr, > retvalue = s->timer_intr_state; > break; > case R_INTR_TEST: > - retvalue = s->timer_intr_test; > + qemu_log_mask(LOG_GUEST_ERROR, > + "Attempted to read INTR_TEST, a write only register"); > break; > default: > qemu_log_mask(LOG_GUEST_ERROR, > @@ -215,10 +215,7 @@ static void ibex_timer_write(void *opaque, hwaddr addr, > s->timer_intr_state &= ~val; > break; > case R_INTR_TEST: > - s->timer_intr_test = val; > - if (s->timer_intr_enable & > - s->timer_intr_test & > - R_INTR_ENABLE_IE_0_MASK) { > + if (s->timer_intr_enable & val & R_INTR_ENABLE_IE_0_MASK) { > s->timer_intr_state |= R_INTR_STATE_IS_0_MASK; > qemu_set_irq(s->irq, true); > } > @@ -247,8 +244,8 @@ static int ibex_timer_post_load(void *opaque, int version_id) > > static const VMStateDescription vmstate_ibex_timer = { > .name = TYPE_IBEX_TIMER, > - .version_id = 1, > - .minimum_version_id = 1, > + .version_id = 2, > + .minimum_version_id = 2, > .post_load = ibex_timer_post_load, > .fields = (VMStateField[]) { > VMSTATE_UINT32(timer_ctrl, IbexTimerState), > @@ -257,7 +254,6 @@ static const VMStateDescription vmstate_ibex_timer = { > VMSTATE_UINT32(timer_compare_upper0, IbexTimerState), > VMSTATE_UINT32(timer_intr_enable, IbexTimerState), > VMSTATE_UINT32(timer_intr_state, IbexTimerState), > - VMSTATE_UINT32(timer_intr_test, IbexTimerState), > VMSTATE_END_OF_LIST() > } > }; > diff --git a/include/hw/timer/ibex_timer.h b/include/hw/timer/ibex_timer.h > index b6f69b38ee..1a0a28d5fa 100644 > --- a/include/hw/timer/ibex_timer.h > +++ b/include/hw/timer/ibex_timer.h > @@ -43,7 +43,6 @@ struct IbexTimerState { > uint32_t timer_compare_upper0; > uint32_t timer_intr_enable; > uint32_t timer_intr_state; > - uint32_t timer_intr_test; > > uint32_t timebase_freq; > > -- > 2.34.1 >
On 1/10/22 06:16, Alistair Francis wrote: > From: Wilfred Mallawa <wilfred.mallawa@wdc.com> > > This change fixes a bug where a write only register is read. > As per https://docs.opentitan.org/hw/ip/rv_timer/doc/#register-table > the 'INTR_TEST0' register is write only. > > Signed-off-by: Wilfred Mallawa <wilfred.mallawa@wdc.com> > --- > hw/timer/ibex_timer.c | 14 +++++--------- > include/hw/timer/ibex_timer.h | 1 - > 2 files changed, 5 insertions(+), 10 deletions(-) Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
On Mon, Jan 10, 2022 at 3:16 PM Alistair Francis <alistair.francis@opensource.wdc.com> wrote: > > From: Wilfred Mallawa <wilfred.mallawa@wdc.com> > > This change fixes a bug where a write only register is read. > As per https://docs.opentitan.org/hw/ip/rv_timer/doc/#register-table > the 'INTR_TEST0' register is write only. > > Signed-off-by: Wilfred Mallawa <wilfred.mallawa@wdc.com> Thanks! Applied to riscv-to-apply.next Alistair > --- > hw/timer/ibex_timer.c | 14 +++++--------- > include/hw/timer/ibex_timer.h | 1 - > 2 files changed, 5 insertions(+), 10 deletions(-) > > diff --git a/hw/timer/ibex_timer.c b/hw/timer/ibex_timer.c > index 66e1f8e48c..826c38b653 100644 > --- a/hw/timer/ibex_timer.c > +++ b/hw/timer/ibex_timer.c > @@ -130,7 +130,6 @@ static void ibex_timer_reset(DeviceState *dev) > s->timer_compare_upper0 = 0xFFFFFFFF; > s->timer_intr_enable = 0x00000000; > s->timer_intr_state = 0x00000000; > - s->timer_intr_test = 0x00000000; > > ibex_timer_update_irqs(s); > } > @@ -168,7 +167,8 @@ static uint64_t ibex_timer_read(void *opaque, hwaddr addr, > retvalue = s->timer_intr_state; > break; > case R_INTR_TEST: > - retvalue = s->timer_intr_test; > + qemu_log_mask(LOG_GUEST_ERROR, > + "Attempted to read INTR_TEST, a write only register"); > break; > default: > qemu_log_mask(LOG_GUEST_ERROR, > @@ -215,10 +215,7 @@ static void ibex_timer_write(void *opaque, hwaddr addr, > s->timer_intr_state &= ~val; > break; > case R_INTR_TEST: > - s->timer_intr_test = val; > - if (s->timer_intr_enable & > - s->timer_intr_test & > - R_INTR_ENABLE_IE_0_MASK) { > + if (s->timer_intr_enable & val & R_INTR_ENABLE_IE_0_MASK) { > s->timer_intr_state |= R_INTR_STATE_IS_0_MASK; > qemu_set_irq(s->irq, true); > } > @@ -247,8 +244,8 @@ static int ibex_timer_post_load(void *opaque, int version_id) > > static const VMStateDescription vmstate_ibex_timer = { > .name = TYPE_IBEX_TIMER, > - .version_id = 1, > - .minimum_version_id = 1, > + .version_id = 2, > + .minimum_version_id = 2, > .post_load = ibex_timer_post_load, > .fields = (VMStateField[]) { > VMSTATE_UINT32(timer_ctrl, IbexTimerState), > @@ -257,7 +254,6 @@ static const VMStateDescription vmstate_ibex_timer = { > VMSTATE_UINT32(timer_compare_upper0, IbexTimerState), > VMSTATE_UINT32(timer_intr_enable, IbexTimerState), > VMSTATE_UINT32(timer_intr_state, IbexTimerState), > - VMSTATE_UINT32(timer_intr_test, IbexTimerState), > VMSTATE_END_OF_LIST() > } > }; > diff --git a/include/hw/timer/ibex_timer.h b/include/hw/timer/ibex_timer.h > index b6f69b38ee..1a0a28d5fa 100644 > --- a/include/hw/timer/ibex_timer.h > +++ b/include/hw/timer/ibex_timer.h > @@ -43,7 +43,6 @@ struct IbexTimerState { > uint32_t timer_compare_upper0; > uint32_t timer_intr_enable; > uint32_t timer_intr_state; > - uint32_t timer_intr_test; > > uint32_t timebase_freq; > > -- > 2.34.1 >
diff --git a/hw/timer/ibex_timer.c b/hw/timer/ibex_timer.c index 66e1f8e48c..826c38b653 100644 --- a/hw/timer/ibex_timer.c +++ b/hw/timer/ibex_timer.c @@ -130,7 +130,6 @@ static void ibex_timer_reset(DeviceState *dev) s->timer_compare_upper0 = 0xFFFFFFFF; s->timer_intr_enable = 0x00000000; s->timer_intr_state = 0x00000000; - s->timer_intr_test = 0x00000000; ibex_timer_update_irqs(s); } @@ -168,7 +167,8 @@ static uint64_t ibex_timer_read(void *opaque, hwaddr addr, retvalue = s->timer_intr_state; break; case R_INTR_TEST: - retvalue = s->timer_intr_test; + qemu_log_mask(LOG_GUEST_ERROR, + "Attempted to read INTR_TEST, a write only register"); break; default: qemu_log_mask(LOG_GUEST_ERROR, @@ -215,10 +215,7 @@ static void ibex_timer_write(void *opaque, hwaddr addr, s->timer_intr_state &= ~val; break; case R_INTR_TEST: - s->timer_intr_test = val; - if (s->timer_intr_enable & - s->timer_intr_test & - R_INTR_ENABLE_IE_0_MASK) { + if (s->timer_intr_enable & val & R_INTR_ENABLE_IE_0_MASK) { s->timer_intr_state |= R_INTR_STATE_IS_0_MASK; qemu_set_irq(s->irq, true); } @@ -247,8 +244,8 @@ static int ibex_timer_post_load(void *opaque, int version_id) static const VMStateDescription vmstate_ibex_timer = { .name = TYPE_IBEX_TIMER, - .version_id = 1, - .minimum_version_id = 1, + .version_id = 2, + .minimum_version_id = 2, .post_load = ibex_timer_post_load, .fields = (VMStateField[]) { VMSTATE_UINT32(timer_ctrl, IbexTimerState), @@ -257,7 +254,6 @@ static const VMStateDescription vmstate_ibex_timer = { VMSTATE_UINT32(timer_compare_upper0, IbexTimerState), VMSTATE_UINT32(timer_intr_enable, IbexTimerState), VMSTATE_UINT32(timer_intr_state, IbexTimerState), - VMSTATE_UINT32(timer_intr_test, IbexTimerState), VMSTATE_END_OF_LIST() } }; diff --git a/include/hw/timer/ibex_timer.h b/include/hw/timer/ibex_timer.h index b6f69b38ee..1a0a28d5fa 100644 --- a/include/hw/timer/ibex_timer.h +++ b/include/hw/timer/ibex_timer.h @@ -43,7 +43,6 @@ struct IbexTimerState { uint32_t timer_compare_upper0; uint32_t timer_intr_enable; uint32_t timer_intr_state; - uint32_t timer_intr_test; uint32_t timebase_freq;