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spapr: Move RMA memory region registration code 

PPC970 does not support VRMA (virtual RMA) so real memory required
for SLOF to execute must be allocated by the KVM_ALLOCATE_RMA ioctl.
Later this memory is used as a part of the guest RAM area.
The RMA allocating code also registers a memory region for this piece
of RAM.

We are going to simplify memory regions layout: RMA memory region
will be a subregion in the RAM memory region, both starting from zero.
This way we will not have to take care of start address alignment for
the piece of RAM next to the RMA.

This moves memory region business closer to the RAM memory region
creation/allocation code.

As this is a mechanical patch, no change in behaviour is expected.

Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
[agraf: fix compilation on non-kvm systems]
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Alexey Kardashevskiy 2014-07-11 01:03:41 +10:00 committed by Alexander Graf
parent e938ba0c35
commit 658fa66b81
3 changed files with 16 additions and 13 deletions
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12
hw/ppc/spapr.c
View File

@ -1223,6 +1223,8 @@ static void ppc_spapr_init(MachineState *machine)
int i;
MemoryRegion *sysmem = get_system_memory();
MemoryRegion *ram = g_new(MemoryRegion, 1);
MemoryRegion *rma_region;
void *rma = NULL;
hwaddr rma_alloc_size;
hwaddr node0_size = (nb_numa_nodes > 1) ? numa_info[0].node_mem : ram_size;
uint32_t initrd_base = 0;
@ -1239,7 +1241,7 @@ static void ppc_spapr_init(MachineState *machine)
cpu_ppc_hypercall = emulate_spapr_hypercall;
/* Allocate RMA if necessary */
rma_alloc_size = kvmppc_alloc_rma("ppc_spapr.rma", sysmem);
rma_alloc_size = kvmppc_alloc_rma(&rma);
if (rma_alloc_size == -1) {
hw_error("qemu: Unable to create RMA\n");
@ -1342,6 +1344,14 @@ static void ppc_spapr_init(MachineState *machine)
memory_region_add_subregion(sysmem, nonrma_base, ram);
}
if (rma_alloc_size && rma) {
rma_region = g_new(MemoryRegion, 1);
memory_region_init_ram_ptr(rma_region, NULL, "ppc_spapr.rma",
rma_alloc_size, rma);
vmstate_register_ram_global(rma_region);
memory_region_add_subregion(sysmem, 0, rma_region);
}
filename = qemu_find_file(QEMU_FILE_TYPE_BIOS, "spapr-rtas.bin");
spapr->rtas_size = load_image_targphys(filename, spapr->rtas_addr,
rtas_limit - spapr->rtas_addr);

13
target-ppc/kvm.c
View File

@ -1580,13 +1580,11 @@ int kvmppc_smt_threads(void)
}
#ifdef TARGET_PPC64
off_t kvmppc_alloc_rma(const char *name, MemoryRegion *sysmem)
off_t kvmppc_alloc_rma(void **rma)
{
void *rma;
off_t size;
int fd;
struct kvm_allocate_rma ret;
MemoryRegion *rma_region;
/* If cap_ppc_rma == 0, contiguous RMA allocation is not supported
* if cap_ppc_rma == 1, contiguous RMA allocation is supported, but
@ -1609,17 +1607,12 @@ off_t kvmppc_alloc_rma(const char *name, MemoryRegion *sysmem)
size = MIN(ret.rma_size, 256ul << 20);
rma = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
if (rma == MAP_FAILED) {
*rma = mmap(NULL, size, PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
if (*rma == MAP_FAILED) {
fprintf(stderr, "KVM: Error mapping RMA: %s\n", strerror(errno));
return -1;
};
rma_region = g_new(MemoryRegion, 1);
memory_region_init_ram_ptr(rma_region, NULL, name, size, rma);
vmstate_register_ram_global(rma_region);
memory_region_add_subregion(sysmem, 0, rma_region);
return size;
}

4
target-ppc/kvm_ppc.h
View File

@ -31,7 +31,7 @@ int kvmppc_or_tsr_bits(PowerPCCPU *cpu, uint32_t tsr_bits);
int kvmppc_set_tcr(PowerPCCPU *cpu);
int kvmppc_booke_watchdog_enable(PowerPCCPU *cpu);
#ifndef CONFIG_USER_ONLY
off_t kvmppc_alloc_rma(const char *name, MemoryRegion *sysmem);
off_t kvmppc_alloc_rma(void **rma);
bool kvmppc_spapr_use_multitce(void);
void *kvmppc_create_spapr_tce(uint32_t liobn, uint32_t window_size, int *pfd,
bool vfio_accel);
@ -134,7 +134,7 @@ static inline int kvmppc_booke_watchdog_enable(PowerPCCPU *cpu)
}
#ifndef CONFIG_USER_ONLY
static inline off_t kvmppc_alloc_rma(const char *name, MemoryRegion *sysmem)
static inline off_t kvmppc_alloc_rma(void **rma)
{
return 0;
}