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66 Commits

Author SHA1 Message Date
Alexander Graf
83ad95957c pl031: Expose RTCICR as proper WC register 
The current PL031 RTCICR register implementation always clears the
IRQ pending status on a register write, regardless of the value the
guest writes.

To justify that behavior, it references the ARM926EJ-S Development
Chip Reference Manual (DDI0287B) and indicates that said document
states that any write clears the internal IRQ state.  It is indeed
true that in section 11.1 this document says:

  "The interrupt is cleared by writing any data value to the
   interrupt clear register RTCICR".

However, later in section 11.2.2 it contradicts itself by saying:

  "Writing 1 to bit 0 of RTCICR clears the RTCINTR flag."

The latter statement matches the PL031 TRM (DDI0224C), which says:

  "Writing 1 to bit position 0 clears the corresponding interrupt.
   Writing 0 has no effect."

Let's assume that the self-contradictory DDI0287B is in error, and
follow the reference manual for the device itself, by making the
register write-one-to-clear.

Reported-by: Hendrik Borghorst <hborghor@amazon.de>
Signed-off-by: Alexander Graf <graf@amazon.com>
Message-id: 20191104115228.30745-1-graf@amazon.com
[PMM: updated commit message to note that DDI0287B says two
 conflicting things]
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
 2019-11-19 13:20:27 +00:00
Paolo Bonzini
7a3e29b12f mc146818rtc: fix timer interrupt reinjection again 
Commit 369b41359a broke timer interrupt
reinjection when there is no period change by the guest.  In that
case, old_period is 0, which ends up zeroing irq_coalesced (counter of
reinjected interrupts).

The consequence is Windows 7 is unable to synchronize time via NTP.
Easily reproducible by playing a fullscreen video with cirrus and VNC.

Fix by passing s->period when periodic_timer_update is called due to
expiration of the timer.  With this change, old_period == 0 only
means that the periodic timer was off.

Reported-by: Marcelo Tosatti <mtosatti@redhat.com>
Co-developed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
 2019-11-19 10:02:13 +01:00
Paolo Bonzini
3ae32adff1 Revert "mc146818rtc: fix timer interrupt reinjection" 
This reverts commit b429de7301, except
that the reversal of the outer "if (period)" is left in.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
 2019-11-19 10:01:34 +01:00
Paolo Bonzini
673652a785 Merge commit 'df84f17' into HEAD 
This merge fixes a semantic conflict with the trivial tree.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
 2019-10-26 15:38:02 +02:00
Philippe Mathieu-Daudé
2330113bf5 hw/rtc/xlnx-zynqmp-rtc: Remove unused "ptimer.h" include 
The "hw/ptimer.h" header is not used, remove it.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20191003230404.19384-14-philmd@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
 2019-10-24 20:34:12 +02:00
Philippe Mathieu-Daudé
7ffcb73d3f hw/rtc/mc146818: Include mc146818rtc_regs.h a bit less 
Only 2 source files require the "mc146818rtc_regs.h" header.
Instead of having it processed 12 times, by all objects
using "mc146818rtc.h", include it directly where used.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20191003230404.19384-13-philmd@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
 2019-10-24 20:33:07 +02:00
Philippe Mathieu-Daudé
ea5dcf4e1d hw: Move Aspeed RTC from hw/timer/ to hw/rtc/ subdirectory 
Move RTC devices under the hw/rtc/ subdirectory.

Reviewed-by: Cédric Le Goater <clg@kaod.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20191003230404.19384-12-philmd@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
 2019-10-24 20:31:44 +02:00
Philippe Mathieu-Daudé
7f0df1ccdf hw: Move Exynos4210 RTC from hw/timer/ to hw/rtc/ subdirectory 
Move RTC devices under the hw/rtc/ subdirectory.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20191003230404.19384-11-philmd@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
 2019-10-24 20:29:18 +02:00
Philippe Mathieu-Daudé
8035f85ef3 hw: Move Xilinx ZynqMP RTC from hw/timer/ to hw/rtc/ subdirectory 
Move RTC devices under the hw/rtc/ subdirectory.

Remove Alistair outdated email address (see commit c22e580c2a).

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20191003230404.19384-10-philmd@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
 2019-10-24 20:28:01 +02:00
Philippe Mathieu-Daudé
64e85ffde8 hw: Move DS1338 device from hw/timer/ to hw/rtc/ subdirectory 
The DS1338 is a Real Time Clock, not a timer.
Move it under the hw/rtc/ subdirectory.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20191003230404.19384-9-philmd@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
 2019-10-24 20:26:35 +02:00
Philippe Mathieu-Daudé
6a648a5f23 hw: Move TWL92230 device from hw/timer/ to hw/rtc/ subdirectory 
The TWL92230 is an "energy management device" companion with
a RTC. Since we mostly model the RTC, move it under the hw/rtc/
subdirectory.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20191003230404.19384-8-philmd@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
 2019-10-24 20:24:50 +02:00
Philippe Mathieu-Daudé
2811ac3059 hw: Move sun4v hypervisor RTC from hw/timer/ to hw/rtc/ subdirectory 
Move RTC devices under the hw/rtc/ subdirectory.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Reviewed-by: Artyom Tarasenko <atar4qemu@gmail.com>
Message-Id: <20191003230404.19384-7-philmd@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
 2019-10-24 20:23:15 +02:00
Philippe Mathieu-Daudé
de04c31d31 hw: Move M41T80 device from hw/timer/ to hw/rtc/ subdirectory 
The M41T80 is a Real Time Clock, not a timer.
Move it under the hw/rtc/ subdirectory.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20191003230404.19384-6-philmd@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
 2019-10-24 20:22:12 +02:00
Philippe Mathieu-Daudé
819ce6b2a5 hw: Move M48T59 device from hw/timer/ to hw/rtc/ subdirectory 
The M48T59 is a Real Time Clock, not a timer.
Move it under the hw/rtc/ subdirectory.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20191003230404.19384-5-philmd@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
 2019-10-24 20:20:45 +02:00
Philippe Mathieu-Daudé
bcdb90640a hw: Move MC146818 device from hw/timer/ to hw/rtc/ subdirectory 
The MC146818 is a Real Time Clock, not a timer.
Move it under the hw/rtc/ subdirectory.

Use copyright statement from 80cabfad16 for "hw/rtc/mc146818rtc.h".

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20191003230404.19384-4-philmd@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
 2019-10-24 20:13:10 +02:00
Philippe Mathieu-Daudé
877c181cd4 hw: Move PL031 device from hw/timer/ to hw/rtc/ subdirectory 
The PL031 is a Real Time Clock, not a timer.
Move it under the hw/rtc/ subdirectory.

Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Acked-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20191003230404.19384-3-philmd@redhat.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
 2019-10-24 20:10:27 +02:00