Re: Re: [PATCH v3 1/1] hw/riscv: Fix max size limit when put initrd to RAM
Hi,
On 2023-04-05 13:53, Alistair Francis wrote:
>
>On Mon, Mar 13, 2023 at 11:12 PM Hang Xu wrote:
>>
>> Because the starting address of ram is not necessarily 0,
>> the remaining free space in ram is
>> ram_size - (start - ram_base) instead of ram_size-start.
>
>I think this could be clearer. It's not clear here that you mean the
>free space after the kernel (for in the initrd).
>
>>
>> Signed-off-by: Hang Xu
>> ---
>> hw/riscv/boot.c | 19 +--
>> hw/riscv/microchip_pfsoc.c | 5 -
>> hw/riscv/opentitan.c | 2 +-
>> hw/riscv/sifive_e.c | 2 +-
>> hw/riscv/sifive_u.c | 5 -
>> hw/riscv/spike.c | 5 -
>> hw/riscv/virt.c | 5 -
>> include/hw/riscv/boot.h | 2 ++
>> 8 files changed, 33 insertions(+), 12 deletions(-)
>>
>> diff --git a/hw/riscv/boot.c b/hw/riscv/boot.c
>> index 52bf8e67de..cfbc376a82 100644
>> --- a/hw/riscv/boot.c
>> +++ b/hw/riscv/boot.c
>> @@ -173,13 +173,14 @@ target_ulong riscv_load_firmware(const char
>> *firmware_filename,
>> exit(1);
>> }
>>
>> -static void riscv_load_initrd(MachineState *machine, uint64_t kernel_entry)
>> +static void riscv_load_initrd(MachineState *machine, uint64_t kernel_entry,
>> + uint64_t ram_base, uint64_t ram_size)
>> {
>> const char *filename = machine->initrd_filename;
>> - uint64_t mem_size = machine->ram_size;
>> void *fdt = machine->fdt;
>> hwaddr start, end;
>> ssize_t size;
>> + uint64_t max_initrd;
>>
>> g_assert(filename != NULL);
>>
>> @@ -193,12 +194,16 @@ static void riscv_load_initrd(MachineState *machine,
>> uint64_t kernel_entry)
>> * So for boards with less than 256MB of RAM we put the initrd
>> * halfway into RAM, and for boards with 256MB of RAM or more we put
>> * the initrd at 128MB.
>> + * A ram_size == 0, usually from a MemMapEntry[].size element,
>> + * means that the RAM block goes all the way to ms->ram_size.
>> */
>> - start = kernel_entry + MIN(mem_size / 2, 128 * MiB);
>> + ram_size = ram_size ? MIN(machine->ram_size, ram_size) :
>> machine->ram_size;
>
>This doesn't seem right. If machine->ram_size is greater then the
>board can support we should tell the user and have them set a correct
>size
>
Here is considering that some machines may divide machine->ram_size into
multiple non-contiguous ram_blocks, and the function parameter 'ram_size'
is only one of them, just like microchip_pfsoc does. In addition,
if ram_size == 0, usually it comes from a MemMapEntry[].size element ,which
uses machine->ram_size at this time. Consider the above two situations：
"ram_size = ram_size ? MIN(machine->ram_size, ram_size) : machine->ram_size"
Hang Xu
>> + start = kernel_entry + MIN(ram_size / 2, 128 * MiB);
>> + max_initrd = ram_size - (start - ram_base);
>
>Good catch. Passing the base address of memory is a good move here.
>
>Alistair
>
>>
>> - size = load_ramdisk(filename, start, mem_size - start);
>> + size = load_ramdisk(filename, start, max_initrd);
>> if (size == -1) {
>> - size = load_image_targphys(filename, start, mem_size - start);
>> + size = load_image_targphys(filename, start, max_initrd);
>> if (size == -1) {
>> error_report("could not load ramdisk '%s'", filename);
>> exit(1);
>> @@ -217,6 +222,8 @@ target_ulong riscv_load_kernel(MachineState *machine,
>> RISCVHartArrayState *harts,
>> target_ulong kernel_start_addr,
>> bool load_initrd,
>> + uint64_t ram_base,
>> + uint64_t ram_size,
>> symbol_fn_t sym_cb)
>> {
>> const char *kernel_filename = machine->kernel_filename;
>> @@ -263,7 +270,7 @@ out:
>> }
>>
>> if (load_initrd && machine->initrd_filename) {
>> - riscv_load_initrd(machine, kernel_entry);
>> + riscv_load_initrd(machine, kernel_entry, ram_base, ram_size);
>> }
>>
>> if (fdt && machine->kernel_cmdline && *machine->kernel_cmdline) {
>> diff --git a/hw/riscv/microchip_pfsoc.c b/hw/riscv/microchip_pfsoc.c
>> index e81bbd12df..b42d90b89e 100644
>> --- a/hw/riscv/microchip_pfsoc.
[PATCH v3 0/1] Fix max initrd size limit when put initrd to RAM
Because the starting address of ram is not necessarily 0, the remaining free space in ram is ram_size - (start - ram_base) instead of ram_size-start. v3: * Declare 'max_initrd' at the start of the function * Fix title typo v2: * Rebase * Considering that the ram block may be discontinuous Hang Xu (1): hw/riscv: Fix max size limit when put initrd to RAM hw/riscv/boot.c| 19 +-- hw/riscv/microchip_pfsoc.c | 5 - hw/riscv/opentitan.c | 2 +- hw/riscv/sifive_e.c| 2 +- hw/riscv/sifive_u.c| 5 - hw/riscv/spike.c | 5 - hw/riscv/virt.c| 5 - include/hw/riscv/boot.h| 2 ++ 8 files changed, 33 insertions(+), 12 deletions(-) -- 2.17.1
[PATCH v3 1/1] hw/riscv: Fix max size limit when put initrd to RAM
Because the starting address of ram is not necessarily 0,
the remaining free space in ram is
ram_size - (start - ram_base) instead of ram_size-start.
Signed-off-by: Hang Xu
---
hw/riscv/boot.c| 19 +--
hw/riscv/microchip_pfsoc.c | 5 -
hw/riscv/opentitan.c | 2 +-
hw/riscv/sifive_e.c| 2 +-
hw/riscv/sifive_u.c| 5 -
hw/riscv/spike.c | 5 -
hw/riscv/virt.c| 5 -
include/hw/riscv/boot.h| 2 ++
8 files changed, 33 insertions(+), 12 deletions(-)
diff --git a/hw/riscv/boot.c b/hw/riscv/boot.c
index 52bf8e67de..cfbc376a82 100644
--- a/hw/riscv/boot.c
+++ b/hw/riscv/boot.c
@@ -173,13 +173,14 @@ target_ulong riscv_load_firmware(const char
*firmware_filename,
exit(1);
}
-static void riscv_load_initrd(MachineState *machine, uint64_t kernel_entry)
+static void riscv_load_initrd(MachineState *machine, uint64_t kernel_entry,
+ uint64_t ram_base, uint64_t ram_size)
{
const char *filename = machine->initrd_filename;
-uint64_t mem_size = machine->ram_size;
void *fdt = machine->fdt;
hwaddr start, end;
ssize_t size;
+uint64_t max_initrd;
g_assert(filename != NULL);
@@ -193,12 +194,16 @@ static void riscv_load_initrd(MachineState *machine,
uint64_t kernel_entry)
* So for boards with less than 256MB of RAM we put the initrd
* halfway into RAM, and for boards with 256MB of RAM or more we put
* the initrd at 128MB.
+ * A ram_size == 0, usually from a MemMapEntry[].size element,
+ * means that the RAM block goes all the way to ms->ram_size.
*/
-start = kernel_entry + MIN(mem_size / 2, 128 * MiB);
+ram_size = ram_size ? MIN(machine->ram_size, ram_size) : machine->ram_size;
+start = kernel_entry + MIN(ram_size / 2, 128 * MiB);
+max_initrd = ram_size - (start - ram_base);
-size = load_ramdisk(filename, start, mem_size - start);
+size = load_ramdisk(filename, start, max_initrd);
if (size == -1) {
-size = load_image_targphys(filename, start, mem_size - start);
+size = load_image_targphys(filename, start, max_initrd);
if (size == -1) {
error_report("could not load ramdisk '%s'", filename);
exit(1);
@@ -217,6 +222,8 @@ target_ulong riscv_load_kernel(MachineState *machine,
RISCVHartArrayState *harts,
target_ulong kernel_start_addr,
bool load_initrd,
+ uint64_t ram_base,
+ uint64_t ram_size,
symbol_fn_t sym_cb)
{
const char *kernel_filename = machine->kernel_filename;
@@ -263,7 +270,7 @@ out:
}
if (load_initrd && machine->initrd_filename) {
-riscv_load_initrd(machine, kernel_entry);
+riscv_load_initrd(machine, kernel_entry, ram_base, ram_size);
}
if (fdt && machine->kernel_cmdline && *machine->kernel_cmdline) {
diff --git a/hw/riscv/microchip_pfsoc.c b/hw/riscv/microchip_pfsoc.c
index e81bbd12df..b42d90b89e 100644
--- a/hw/riscv/microchip_pfsoc.c
+++ b/hw/riscv/microchip_pfsoc.c
@@ -630,7 +630,10 @@ static void microchip_icicle_kit_machine_init(MachineState
*machine)
firmware_end_addr);
kernel_entry = riscv_load_kernel(machine, &s->soc.u_cpus,
- kernel_start_addr, true, NULL);
+ kernel_start_addr, true,
+ memmap[MICROCHIP_PFSOC_DRAM_LO].base,
+ memmap[MICROCHIP_PFSOC_DRAM_LO].size,
+ NULL);
/* Compute the fdt load address in dram */
fdt_load_addr =
riscv_compute_fdt_addr(memmap[MICROCHIP_PFSOC_DRAM_LO].base,
diff --git a/hw/riscv/opentitan.c b/hw/riscv/opentitan.c
index b06944d382..bb663523d5 100644
--- a/hw/riscv/opentitan.c
+++ b/hw/riscv/opentitan.c
@@ -103,7 +103,7 @@ static void opentitan_board_init(MachineState *machine)
if (machine->kernel_filename) {
riscv_load_kernel(machine, &s->soc.cpus,
memmap[IBEX_DEV_RAM].base,
- false, NULL);
+ false, 0, 0, NULL);
}
}
diff --git a/hw/riscv/sifive_e.c b/hw/riscv/sifive_e.c
index 04939b60c3..5b47d539a6 100644
--- a/hw/riscv/sifive_e.c
+++ b/hw/riscv/sifive_e.c
@@ -116,7 +116,7 @@ static void sifive_e_machine_init(MachineState *machine)
if (machine->kernel_filename) {
riscv_load_kernel(machine, &s->soc.cpus,
memmap[SIFIVE_E_DEV_DTIM].base,
- false, NULL);
+ false, 0, 0, NULL);
}
}
diff
