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authorPeter Maydell <peter.maydell@linaro.org>2016-02-11 14:16:25 +0000
committerPeter Maydell <peter.maydell@linaro.org>2016-02-18 18:15:12 +0000
commit70bc9b6cb7588ae05cf4f8d6a67d60942c0e7490 (patch)
treef8b61f1ab07f37c20f03618615f70d8ac664b9e9
parent61b33408bb211dfd53d4b0e2f22d5c1bc9dd24f4 (diff)
downloadqemu-arm-70bc9b6cb7588ae05cf4f8d6a67d60942c0e7490.tar.gz
hw/arm/virt: Make first flash device Secure-only if booting secure
If the virt board is started with the 'secure' property set to request a Secure setup, then make the first flash device be visible only to the Secure world. This is a breaking change, but I don't expect it to be noticed by anybody, because running TZ-aware guests isn't common and those guests are generally going to be booting from the flash and implicitly expecting their Non-secure guests to not touch it. Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
-rw-r--r--hw/arm/virt.c63
1 files changed, 49 insertions, 14 deletions
diff --git a/hw/arm/virt.c b/hw/arm/virt.c
index 391cf3f978..4499e2cf1b 100644
--- a/hw/arm/virt.c
+++ b/hw/arm/virt.c
@@ -679,7 +679,8 @@ static void create_virtio_devices(const VirtBoardInfo *vbi, qemu_irq *pic)
}
static void create_one_flash(const char *name, hwaddr flashbase,
- hwaddr flashsize, const char *file)
+ hwaddr flashsize, const char *file,
+ MemoryRegion *sysmem)
{
/* Create and map a single flash device. We use the same
* parameters as the flash devices on the Versatile Express board.
@@ -706,7 +707,8 @@ static void create_one_flash(const char *name, hwaddr flashbase,
qdev_prop_set_string(dev, "name", name);
qdev_init_nofail(dev);
- sysbus_mmio_map(sbd, 0, flashbase);
+ memory_region_add_subregion(sysmem, flashbase,
+ sysbus_mmio_get_region(SYS_BUS_DEVICE(dev), 0));
if (file) {
char *fn;
@@ -732,26 +734,59 @@ static void create_one_flash(const char *name, hwaddr flashbase,
}
}
-static void create_flash(const VirtBoardInfo *vbi)
+static void create_flash(const VirtBoardInfo *vbi,
+ MemoryRegion *sysmem,
+ MemoryRegion *secure_sysmem)
{
/* Create two flash devices to fill the VIRT_FLASH space in the memmap.
* Any file passed via -bios goes in the first of these.
+ * sysmem is the system memory space. secure_sysmem is the secure view
+ * of the system, and the first flash device should be made visible only
+ * there. The second flash device is visible to both secure and nonsecure.
+ * If sysmem == secure_sysmem this means there is no separate Secure
+ * address space and both flash devices are generally visible.
*/
hwaddr flashsize = vbi->memmap[VIRT_FLASH].size / 2;
hwaddr flashbase = vbi->memmap[VIRT_FLASH].base;
char *nodename;
- create_one_flash("virt.flash0", flashbase, flashsize, bios_name);
- create_one_flash("virt.flash1", flashbase + flashsize, flashsize, NULL);
+ create_one_flash("virt.flash0", flashbase, flashsize,
+ bios_name, secure_sysmem);
+ create_one_flash("virt.flash1", flashbase + flashsize, flashsize,
+ NULL, sysmem);
- nodename = g_strdup_printf("/flash@%" PRIx64, flashbase);
- qemu_fdt_add_subnode(vbi->fdt, nodename);
- qemu_fdt_setprop_string(vbi->fdt, nodename, "compatible", "cfi-flash");
- qemu_fdt_setprop_sized_cells(vbi->fdt, nodename, "reg",
- 2, flashbase, 2, flashsize,
- 2, flashbase + flashsize, 2, flashsize);
- qemu_fdt_setprop_cell(vbi->fdt, nodename, "bank-width", 4);
- g_free(nodename);
+ if (sysmem == secure_sysmem) {
+ /* Report both flash devices as a single node in the DT */
+ nodename = g_strdup_printf("/flash@%" PRIx64, flashbase);
+ qemu_fdt_add_subnode(vbi->fdt, nodename);
+ qemu_fdt_setprop_string(vbi->fdt, nodename, "compatible", "cfi-flash");
+ qemu_fdt_setprop_sized_cells(vbi->fdt, nodename, "reg",
+ 2, flashbase, 2, flashsize,
+ 2, flashbase + flashsize, 2, flashsize);
+ qemu_fdt_setprop_cell(vbi->fdt, nodename, "bank-width", 4);
+ g_free(nodename);
+ } else {
+ /* Report the devices as separate nodes so we can mark one as
+ * only visible to the secure world.
+ */
+ nodename = g_strdup_printf("/secflash@%" PRIx64, flashbase);
+ qemu_fdt_add_subnode(vbi->fdt, nodename);
+ qemu_fdt_setprop_string(vbi->fdt, nodename, "compatible", "cfi-flash");
+ qemu_fdt_setprop_sized_cells(vbi->fdt, nodename, "reg",
+ 2, flashbase, 2, flashsize);
+ qemu_fdt_setprop_cell(vbi->fdt, nodename, "bank-width", 4);
+ qemu_fdt_setprop_string(vbi->fdt, nodename, "status", "disabled");
+ qemu_fdt_setprop_string(vbi->fdt, nodename, "secure-status", "okay");
+ g_free(nodename);
+
+ nodename = g_strdup_printf("/flash@%" PRIx64, flashbase);
+ qemu_fdt_add_subnode(vbi->fdt, nodename);
+ qemu_fdt_setprop_string(vbi->fdt, nodename, "compatible", "cfi-flash");
+ qemu_fdt_setprop_sized_cells(vbi->fdt, nodename, "reg",
+ 2, flashbase + flashsize, 2, flashsize);
+ qemu_fdt_setprop_cell(vbi->fdt, nodename, "bank-width", 4);
+ g_free(nodename);
+ }
}
static void create_fw_cfg(const VirtBoardInfo *vbi, AddressSpace *as)
@@ -1171,7 +1206,7 @@ static void machvirt_init(MachineState *machine)
machine->ram_size);
memory_region_add_subregion(sysmem, vbi->memmap[VIRT_MEM].base, ram);
- create_flash(vbi);
+ create_flash(vbi, sysmem, secure_sysmem ? secure_sysmem : sysmem);
create_gic(vbi, pic, gic_version, vms->secure);