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hw/arm/virt: Provide a secure-only RAM if booting in Secure mode

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If we're booting in Secure mode, provide a secure-only RAM
(just 16MB) so that secure firmware has somewhere to run
from that won't be accessible to the Non-secure guest.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1455288361-30117-2-git-send-email-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2016-03-04 11:30:17 +00:00
parent 8b41c30525
commit 83ec1923cd
2 changed files with 24 additions and 0 deletions
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23
hw/arm/virt.c
View file

@ -144,6 +144,7 @@ static const MemMapEntry a15memmap[] = {
[VIRT_MMIO] = { 0x0a000000, 0x00000200 },
/* ...repeating for a total of NUM_VIRTIO_TRANSPORTS, each of that size */
[VIRT_PLATFORM_BUS] = { 0x0c000000, 0x02000000 },
[VIRT_SECURE_MEM] = { 0x0e000000, 0x01000000 },
[VIRT_PCIE_MMIO] = { 0x10000000, 0x2eff0000 },
[VIRT_PCIE_PIO] = { 0x3eff0000, 0x00010000 },
[VIRT_PCIE_ECAM] = { 0x3f000000, 0x01000000 },
@ -977,6 +978,27 @@ static void create_platform_bus(VirtBoardInfo *vbi, qemu_irq *pic)
sysbus_mmio_get_region(s, 0));
}
static void create_secure_ram(VirtBoardInfo *vbi, MemoryRegion *secure_sysmem)
{
MemoryRegion *secram = g_new(MemoryRegion, 1);
char *nodename;
hwaddr base = vbi->memmap[VIRT_SECURE_MEM].base;
hwaddr size = vbi->memmap[VIRT_SECURE_MEM].size;
memory_region_init_ram(secram, NULL, "virt.secure-ram", size, &error_fatal);
vmstate_register_ram_global(secram);
memory_region_add_subregion(secure_sysmem, base, secram);
nodename = g_strdup_printf("/secram@%" PRIx64, base);
qemu_fdt_add_subnode(vbi->fdt, nodename);
qemu_fdt_setprop_string(vbi->fdt, nodename, "device_type", "memory");
qemu_fdt_setprop_sized_cells(vbi->fdt, nodename, "reg", 2, base, 2, size);
qemu_fdt_setprop_string(vbi->fdt, nodename, "status", "disabled");
qemu_fdt_setprop_string(vbi->fdt, nodename, "secure-status", "okay");
g_free(nodename);
}
static void *machvirt_dtb(const struct arm_boot_info *binfo, int *fdt_size)
{
const VirtBoardInfo *board = (const VirtBoardInfo *)binfo;
@ -1169,6 +1191,7 @@ static void machvirt_init(MachineState *machine)
create_uart(vbi, pic, VIRT_UART, sysmem);
if (vms->secure) {
create_secure_ram(vbi, secure_sysmem);
create_uart(vbi, pic, VIRT_SECURE_UART, secure_sysmem);
}

1
include/hw/arm/virt.h
View file

@ -61,6 +61,7 @@ enum {
VIRT_PCIE_MMIO_HIGH,
VIRT_GPIO,
VIRT_SECURE_UART,
VIRT_SECURE_MEM,
};
typedef struct MemMapEntry {