From 3ac24188eccffe4b6038b47f446c3472897abdf4 Mon Sep 17 00:00:00 2001 From: Mark Cave-Ayland Date: Fri, 10 Aug 2018 11:40:37 +0100 Subject: [PATCH 1/2] sun4u: ensure kernel_top is always initialised Valgrind reports that when loading a non-ELF kernel, kernel_top may be used uninitialised when checking for an initrd. Since there are no known non-ELF kernels for SPARC64 then we can simply initialise kernel_top to 0 and then skip the initrd load process if it hasn't been set by load_elf(). Reported-by: Thomas Huth Signed-off-by: Mark Cave-Ayland --- hw/sparc64/sun4u.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/hw/sparc64/sun4u.c b/hw/sparc64/sun4u.c index 74b748497e..d16843b30e 100644 --- a/hw/sparc64/sun4u.c +++ b/hw/sparc64/sun4u.c @@ -139,7 +139,7 @@ static uint64_t sun4u_load_kernel(const char *kernel_filename, unsigned int i; long kernel_size; uint8_t *ptr; - uint64_t kernel_top; + uint64_t kernel_top = 0; linux_boot = (kernel_filename != NULL); @@ -172,7 +172,7 @@ static uint64_t sun4u_load_kernel(const char *kernel_filename, } /* load initrd above kernel */ *initrd_size = 0; - if (initrd_filename) { + if (initrd_filename && kernel_top) { *initrd_addr = TARGET_PAGE_ALIGN(kernel_top); *initrd_size = load_image_targphys(initrd_filename, From 8498321421e95a822dc7a5dd3184890766a029bb Mon Sep 17 00:00:00 2001 From: Mark Cave-Ayland Date: Fri, 10 Aug 2018 12:41:10 +0100 Subject: [PATCH 2/2] sun4m: don't use legacy fw_cfg_init_mem() function Instead initialise the device via qdev to allow us to set device properties directly as required. Signed-off-by: Mark Cave-Ayland --- hw/sparc/sun4m.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) diff --git a/hw/sparc/sun4m.c b/hw/sparc/sun4m.c index d981de1841..3c29b68e67 100644 --- a/hw/sparc/sun4m.c +++ b/hw/sparc/sun4m.c @@ -1035,7 +1035,17 @@ static void sun4m_hw_init(const struct sun4m_hwdef *hwdef, ecc_init(hwdef->ecc_base, slavio_irq[28], hwdef->ecc_version); - fw_cfg = fw_cfg_init_mem(CFG_ADDR, CFG_ADDR + 2); + dev = qdev_create(NULL, TYPE_FW_CFG_MEM); + fw_cfg = FW_CFG(dev); + qdev_prop_set_uint32(dev, "data_width", 1); + qdev_prop_set_bit(dev, "dma_enabled", false); + object_property_add_child(OBJECT(qdev_get_machine()), TYPE_FW_CFG, + OBJECT(fw_cfg), NULL); + qdev_init_nofail(dev); + s = SYS_BUS_DEVICE(dev); + sysbus_mmio_map(s, 0, CFG_ADDR); + sysbus_mmio_map(s, 1, CFG_ADDR + 2); + fw_cfg_add_i16(fw_cfg, FW_CFG_NB_CPUS, (uint16_t)smp_cpus); fw_cfg_add_i16(fw_cfg, FW_CFG_MAX_CPUS, (uint16_t)max_cpus); fw_cfg_add_i64(fw_cfg, FW_CFG_RAM_SIZE, (uint64_t)ram_size);