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[Qemu-devel] [PATCH-for-4.1 v7 1/1] hw/block/pflash_cfi01: Add missing D
From: |
Philippe Mathieu-Daudé |
Subject: |
[Qemu-devel] [PATCH-for-4.1 v7 1/1] hw/block/pflash_cfi01: Add missing DeviceReset() handler |
Date: |
Thu, 18 Jul 2019 12:48:37 +0200 |
To avoid incoherent states when the machine resets (see but report
below), add the device reset callback.
A "system reset" sets the device state machine in READ_ARRAY mode
and, after some delay, set the SR.7 READY bit.
Since we do not model timings, we set the SR.7 bit directly.
Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1678713
Reported-by: Laszlo Ersek <address@hidden>
Reviewed-by: John Snow <address@hidden>
Reviewed-by: Alistair Francis <address@hidden>
Signed-off-by: Philippe Mathieu-Daudé <address@hidden>
---
hw/block/pflash_cfi01.c | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/hw/block/pflash_cfi01.c b/hw/block/pflash_cfi01.c
index 435be1e35c..a1ec1faae5 100644
--- a/hw/block/pflash_cfi01.c
+++ b/hw/block/pflash_cfi01.c
@@ -865,6 +865,24 @@ static void pflash_cfi01_realize(DeviceState *dev, Error
**errp)
pfl->cfi_table[0x3f] = 0x01; /* Number of protection fields */
}
+static void pflash_cfi01_system_reset(DeviceState *dev)
+{
+ PFlashCFI01 *pfl = PFLASH_CFI01(dev);
+
+ /*
+ * The command 0x00 is not assigned by the CFI open standard,
+ * but QEMU historically uses it for the READ_ARRAY command (0xff).
+ */
+ pfl->cmd = 0x00;
+ pfl->wcycle = 0;
+ memory_region_rom_device_set_romd(&pfl->mem, true);
+ /*
+ * The WSM ready timer occurs at most 150ns after system reset.
+ * This model deliberately ignores this delay.
+ */
+ pfl->status = 0x80;
+}
+
static Property pflash_cfi01_properties[] = {
DEFINE_PROP_DRIVE("drive", PFlashCFI01, blk),
/* num-blocks is the number of blocks actually visible to the guest,
@@ -909,6 +927,7 @@ static void pflash_cfi01_class_init(ObjectClass *klass,
void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
+ dc->reset = pflash_cfi01_system_reset;
dc->realize = pflash_cfi01_realize;
dc->props = pflash_cfi01_properties;
dc->vmsd = &vmstate_pflash;
--
2.20.1
- [Qemu-devel] [PATCH-for-4.1 v7 0/1] hw/block/pflash_cfi01: Add DeviceReset() handler, Philippe Mathieu-Daudé, 2019/07/18
- [Qemu-devel] [PATCH-for-4.1 v7 1/1] hw/block/pflash_cfi01: Add missing DeviceReset() handler,
Philippe Mathieu-Daudé <=
- Re: [Qemu-devel] [PATCH-for-4.1 v7 1/1] hw/block/pflash_cfi01: Add missing DeviceReset() handler, Laszlo Ersek, 2019/07/18
- Re: [Qemu-devel] [PATCH-for-4.1 v7 1/1] hw/block/pflash_cfi01: Add missing DeviceReset() handler, Laszlo Ersek, 2019/07/18
- Re: [Qemu-devel] [PATCH-for-4.1 v7 1/1] hw/block/pflash_cfi01: Add missing DeviceReset() handler, Philippe Mathieu-Daudé, 2019/07/18
- Re: [Qemu-devel] [PATCH-for-4.1 v7 1/1] hw/block/pflash_cfi01: Add missing DeviceReset() handler, Philippe Mathieu-Daudé, 2019/07/19
- Re: [Qemu-devel] [PATCH-for-4.1 v7 1/1] hw/block/pflash_cfi01: Add missing DeviceReset() handler, Laszlo Ersek, 2019/07/22
- Re: [Qemu-devel] [PATCH-for-4.1 v7 1/1] hw/block/pflash_cfi01: Add missing DeviceReset() handler, Philippe Mathieu-Daudé, 2019/07/22
- Re: [Qemu-devel] [PATCH-for-4.1 v7 1/1] hw/block/pflash_cfi01: Add missing DeviceReset() handler, Peter Maydell, 2019/07/22
- Re: [Qemu-devel] [PATCH-for-4.1 v7 1/1] hw/block/pflash_cfi01: Add missing DeviceReset() handler, Laszlo Ersek, 2019/07/23
Re: [Qemu-devel] [PATCH-for-4.1 v7 1/1] hw/block/pflash_cfi01: Add missing DeviceReset() handler, Philippe Mathieu-Daudé, 2019/07/22