From a7538ca0791880b6aeb2cc4cc8c00305e2d975f8 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?C=C3=A9dric=20Le=20Goater?= Date: Tue, 19 Mar 2024 08:33:20 +0100 Subject: [PATCH] aspeed/smc: Only wire flash devices at reset MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The Aspeed machines have many Static Memory Controllers (SMC), up to 8, which can only drive flash memory devices. Commit 27a2c66c92ec ("aspeed/smc: Wire CS lines at reset") tried to ease the definitions of these devices by allowing flash devices from the command line to be attached to a SSI bus. For that, the wiring of the CS lines of the Aspeed SMC controller was moved at reset. Two assumptions are made though, first that the device has a SSI_GPIO_CS GPIO line, which is not always the case, and second that it is a flash device. Correct this problem by ensuring that the devices attached to the bus are of the correct flash type. This fixes a QEMU abort when devices without a CS line, such as the max111x, are passed on the command line. While at it, export TYPE_M25P80 used in the Xilinx Versal Virtual machine. Resolves: https://gitlab.com/qemu-project/qemu/-/issues/2228 Fixes: 27a2c66c92ec ("aspeed/smc: Wire CS lines at reset") Reported-by: Thomas Huth Reviewed-by: Thomas Huth Tested-by: Thomas Huth [ clg: minor fixes in the commit log ] Signed-off-by: Cédric Le Goater --- hw/arm/xlnx-versal-virt.c | 3 ++- hw/block/m25p80.c | 1 - hw/ssi/aspeed_smc.c | 9 +++++++++ include/hw/block/flash.h | 2 ++ 4 files changed, 13 insertions(+), 2 deletions(-) diff --git a/hw/arm/xlnx-versal-virt.c b/hw/arm/xlnx-versal-virt.c index bfaed1aebf..962f98fee2 100644 --- a/hw/arm/xlnx-versal-virt.c +++ b/hw/arm/xlnx-versal-virt.c @@ -13,6 +13,7 @@ #include "qemu/error-report.h" #include "qapi/error.h" #include "sysemu/device_tree.h" +#include "hw/block/flash.h" #include "hw/boards.h" #include "hw/sysbus.h" #include "hw/arm/fdt.h" @@ -759,7 +760,7 @@ static void versal_virt_init(MachineState *machine) flash_klass = object_class_by_name(s->ospi_model); if (!flash_klass || object_class_is_abstract(flash_klass) || - !object_class_dynamic_cast(flash_klass, "m25p80-generic")) { + !object_class_dynamic_cast(flash_klass, TYPE_M25P80)) { error_setg(&error_fatal, "'%s' is either abstract or" " not a subtype of m25p80", s->ospi_model); return; diff --git a/hw/block/m25p80.c b/hw/block/m25p80.c index 08a00a6d9b..8dec134832 100644 --- a/hw/block/m25p80.c +++ b/hw/block/m25p80.c @@ -515,7 +515,6 @@ struct M25P80Class { FlashPartInfo *pi; }; -#define TYPE_M25P80 "m25p80-generic" OBJECT_DECLARE_TYPE(Flash, M25P80Class, M25P80) static inline Manufacturer get_man(Flash *s) diff --git a/hw/ssi/aspeed_smc.c b/hw/ssi/aspeed_smc.c index 3c93936fd1..6e1a84c197 100644 --- a/hw/ssi/aspeed_smc.c +++ b/hw/ssi/aspeed_smc.c @@ -23,6 +23,7 @@ */ #include "qemu/osdep.h" +#include "hw/block/flash.h" #include "hw/sysbus.h" #include "migration/vmstate.h" #include "qemu/log.h" @@ -695,6 +696,14 @@ static void aspeed_smc_reset(DeviceState *d) for (i = 0; i < asc->cs_num_max; i++) { DeviceState *dev = ssi_get_cs(s->spi, i); if (dev) { + Object *o = OBJECT(dev); + + if (!object_dynamic_cast(o, TYPE_M25P80)) { + warn_report("Aspeed SMC %s.%d : Invalid %s device type", + BUS(s->spi)->name, i, object_get_typename(o)); + continue; + } + qemu_irq cs_line = qdev_get_gpio_in_named(dev, SSI_GPIO_CS, 0); qdev_connect_gpio_out_named(DEVICE(s), "cs", i, cs_line); } diff --git a/include/hw/block/flash.h b/include/hw/block/flash.h index de93756cbe..2b5ccd92f4 100644 --- a/include/hw/block/flash.h +++ b/include/hw/block/flash.h @@ -78,6 +78,8 @@ extern const VMStateDescription vmstate_ecc_state; /* m25p80.c */ +#define TYPE_M25P80 "m25p80-generic" + BlockBackend *m25p80_get_blk(DeviceState *dev); #endif