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hw/ppc/spapr: Use machine_memory_devices_init()

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Let's use our new helper and stop always allocating ms->device_memory.
There is no difference in common memory-device code anymore between
ms->device_memory being NULL or the size being 0. So we only have to
teach spapr code that ms->device_memory isn't always around.

We can now modify two maxram_size checks to rely on ms->device_memory
for detecting whether we have memory devices.

Cc: Daniel Henrique Barboza <danielhb413@gmail.com>
Cc: "Cédric Le Goater" <clg@kaod.org>
Cc: David Gibson <david@gibson.dropbear.id.au>
Cc: Greg Kurz <groug@kaod.org>
Cc: Harsh Prateek Bora <harshpb@linux.ibm.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20230623124553.400585-5-david@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
This commit is contained in:
David Hildenbrand 2023-06-23 14:45:47 +02:00
parent 176d073029
commit c0ce7b4acb
2 changed files with 20 additions and 19 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

37
hw/ppc/spapr.c
View file

@ -547,10 +547,8 @@ static int spapr_dt_dynamic_reconfiguration_memory(SpaprMachineState *spapr,
cpu_to_be32(lmb_size & 0xffffffff)};
MemoryDeviceInfoList *dimms = NULL;
/*
* Don't create the node if there is no device memory
*/
if (machine->ram_size == machine->maxram_size) {
/* Don't create the node if there is no device memory. */
if (!machine->device_memory) {
return 0;
}
@ -860,16 +858,23 @@ static void spapr_dt_rtas(SpaprMachineState *spapr, void *fdt)
int rtas;
GString *hypertas = g_string_sized_new(256);
GString *qemu_hypertas = g_string_sized_new(256);
uint64_t max_device_addr = MACHINE(spapr)->device_memory->base +
memory_region_size(&MACHINE(spapr)->device_memory->mr);
uint32_t lrdr_capacity[] = {
cpu_to_be32(max_device_addr >> 32),
cpu_to_be32(max_device_addr & 0xffffffff),
0,
0,
cpu_to_be32(SPAPR_MEMORY_BLOCK_SIZE >> 32),
cpu_to_be32(SPAPR_MEMORY_BLOCK_SIZE & 0xffffffff),
cpu_to_be32(ms->smp.max_cpus / ms->smp.threads),
};
/* Do we have device memory? */
if (MACHINE(spapr)->device_memory) {
uint64_t max_device_addr = MACHINE(spapr)->device_memory->base +
memory_region_size(&MACHINE(spapr)->device_memory->mr);
lrdr_capacity[0] = cpu_to_be32(max_device_addr >> 32);
lrdr_capacity[1] = cpu_to_be32(max_device_addr & 0xffffffff);
}
_FDT(rtas = fdt_add_subnode(fdt, 0, "rtas"));
/* hypertas */
@ -2455,6 +2460,7 @@ static void spapr_create_lmb_dr_connectors(SpaprMachineState *spapr)
uint32_t nr_lmbs = (machine->maxram_size - machine->ram_size)/lmb_size;
int i;
g_assert(!nr_lmbs || machine->device_memory);
for (i = 0; i < nr_lmbs; i++) {
uint64_t addr;
@ -2876,12 +2882,11 @@ static void spapr_machine_init(MachineState *machine)
/* map RAM */
memory_region_add_subregion(sysmem, 0, machine->ram);
/* always allocate the device memory information */
machine->device_memory = g_malloc0(sizeof(*machine->device_memory));
/* initialize hotplug memory address space */
if (machine->ram_size < machine->maxram_size) {
ram_addr_t device_mem_size = machine->maxram_size - machine->ram_size;
hwaddr device_mem_base;
/*
* Limit the number of hotpluggable memory slots to half the number
* slots that KVM supports, leaving the other half for PCI and other
@ -2900,12 +2905,8 @@ static void spapr_machine_init(MachineState *machine)
exit(1);
}
machine->device_memory->base = ROUND_UP(machine->ram_size,
SPAPR_DEVICE_MEM_ALIGN);
memory_region_init(&machine->device_memory->mr, OBJECT(spapr),
"device-memory", device_mem_size);
memory_region_add_subregion(sysmem, machine->device_memory->base,
&machine->device_memory->mr);
device_mem_base = ROUND_UP(machine->ram_size, SPAPR_DEVICE_MEM_ALIGN);
machine_memory_devices_init(machine, device_mem_base, device_mem_size);
}
if (smc->dr_lmb_enabled) {
@ -5119,7 +5120,7 @@ static bool phb_placement_2_7(SpaprMachineState *spapr, uint32_t index,
int i;
/* Do we have device memory? */
if (MACHINE(spapr)->maxram_size > ram_top) {
if (MACHINE(spapr)->device_memory) {
/* Can't just use maxram_size, because there may be an
* alignment gap between normal and device memory regions
*/

2
hw/ppc/spapr_hcall.c
View file

@ -32,7 +32,7 @@ bool is_ram_address(SpaprMachineState *spapr, hwaddr addr)
if (addr < machine->ram_size) {
return true;
}
if ((addr >= dms->base)
if (dms && (addr >= dms->base)
&& ((addr - dms->base) < memory_region_size(&dms->mr))) {
return true;
}