#include "kvm_ppc.h"
#include "cpu.h"
#include "device_tree.h"
+#include "hw/sysbus.h"
+#include "hw/spapr.h"
#include "hw/sysbus.h"
#include "hw/spapr.h"
static int cap_interrupt_level = false;
static int cap_segstate;
static int cap_booke_sregs;
+static int cap_ppc_smt;
+static int cap_ppc_rma;
+static int cap_spapr_tce;
/* XXX We have a race condition where we actually have a level triggered
* interrupt, but the infrastructure can't expose that yet, so the guest
cap_interrupt_level = kvm_check_extension(s, KVM_CAP_PPC_IRQ_LEVEL);
cap_segstate = kvm_check_extension(s, KVM_CAP_PPC_SEGSTATE);
cap_booke_sregs = kvm_check_extension(s, KVM_CAP_PPC_BOOKE_SREGS);
+ cap_ppc_smt = kvm_check_extension(s, KVM_CAP_PPC_SMT);
+ cap_ppc_rma = kvm_check_extension(s, KVM_CAP_PPC_RMA);
+ cap_spapr_tce = kvm_check_extension(s, KVM_CAP_SPAPR_TCE);
if (!cap_interrupt_level) {
fprintf(stderr, "KVM: Couldn't find level irq capability. Expect the "
return 0;
}
-uint64_t kvmppc_get_clockfreq(void)
+/* Read a CPU node property from the host device tree that's a single
+ * integer (32-bit or 64-bit). Returns 0 if anything goes wrong
+ * (can't find or open the property, or doesn't understand the
+ * format) */
+static uint64_t kvmppc_read_int_cpu_dt(const char *propname)
{
- char buf[512];
- uint32_t tb[2];
+ char buf[PATH_MAX];
+ union {
+ uint32_t v32;
+ uint64_t v64;
+ } u;
FILE *f;
int len;
if (kvmppc_find_cpu_dt(buf, sizeof(buf))) {
- return 0;
+ return -1;
}
- strncat(buf, "/clock-frequency", sizeof(buf) - strlen(buf));
+ strncat(buf, "/", sizeof(buf) - strlen(buf));
+ strncat(buf, propname, sizeof(buf) - strlen(buf));
f = fopen(buf, "rb");
if (!f) {
return -1;
}
- len = fread(tb, sizeof(tb[0]), 2, f);
+ len = fread(&u, 1, sizeof(u), f);
fclose(f);
switch (len) {
- case 1:
- /* freq is only a single cell */
- return tb[0];
- case 2:
- return *(uint64_t*)tb;
+ case 4:
+ /* property is a 32-bit quantity */
+ return be32_to_cpu(u.v32);
+ case 8:
+ return be64_to_cpu(u.v64);
}
return 0;
}
+uint64_t kvmppc_get_clockfreq(void)
+{
+ return kvmppc_read_int_cpu_dt("clock-frequency");
+}
+
+uint32_t kvmppc_get_vmx(void)
+{
+ return kvmppc_read_int_cpu_dt("ibm,vmx");
+}
+
+uint32_t kvmppc_get_dfp(void)
+{
+ return kvmppc_read_int_cpu_dt("ibm,dfp");
+}
+
int kvmppc_get_hypercall(CPUState *env, uint8_t *buf, int buf_len)
{
uint32_t *hc = (uint32_t*)buf;
cpu_abort(env, "This KVM version does not support PAPR\n");
}
+int kvmppc_smt_threads(void)
+{
+ return cap_ppc_smt ? cap_ppc_smt : 1;
+}
+
+off_t kvmppc_alloc_rma(const char *name, MemoryRegion *sysmem)
+{
+ 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
+ * not necessary on this hardware
+ * if cap_ppc_rma == 2, contiguous RMA allocation is needed on this hardware
+ *
+ * FIXME: We should allow the user to force contiguous RMA
+ * allocation in the cap_ppc_rma==1 case.
+ */
+ if (cap_ppc_rma < 2) {
+ return 0;
+ }
+
+ fd = kvm_vm_ioctl(kvm_state, KVM_ALLOCATE_RMA, &ret);
+ if (fd < 0) {
+ fprintf(stderr, "KVM: Error on KVM_ALLOCATE_RMA: %s\n",
+ strerror(errno));
+ return -1;
+ }
+
+ size = MIN(ret.rma_size, 256ul << 20);
+
+ 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);
+ memory_region_add_subregion(sysmem, 0, rma_region);
+
+ return size;
+}
+
+void *kvmppc_create_spapr_tce(uint32_t liobn, uint32_t window_size, int *pfd)
+{
+ struct kvm_create_spapr_tce args = {
+ .liobn = liobn,
+ .window_size = window_size,
+ };
+ long len;
+ int fd;
+ void *table;
+
+ if (!cap_spapr_tce) {
+ return NULL;
+ }
+
+ fd = kvm_vm_ioctl(kvm_state, KVM_CREATE_SPAPR_TCE, &args);
+ if (fd < 0) {
+ return NULL;
+ }
+
+ len = (window_size / SPAPR_VIO_TCE_PAGE_SIZE) * sizeof(VIOsPAPR_RTCE);
+ /* FIXME: round this up to page size */
+
+ table = mmap(NULL, len, PROT_READ, MAP_SHARED, fd, 0);
+ if (table == MAP_FAILED) {
+ close(fd);
+ return NULL;
+ }
+
+ *pfd = fd;
+ return table;
+}
+
+int kvmppc_remove_spapr_tce(void *table, int fd, uint32_t window_size)
+{
+ long len;
+
+ if (fd < 0) {
+ return -1;
+ }
+
+ len = (window_size / SPAPR_VIO_TCE_PAGE_SIZE)*sizeof(VIOsPAPR_RTCE);
+ if ((munmap(table, len) < 0) ||
+ (close(fd) < 0)) {
+ fprintf(stderr, "KVM: Unexpected error removing KVM SPAPR TCE "
+ "table: %s", strerror(errno));
+ /* Leak the table */
+ }
+
+ return 0;
+}
+
+static inline uint32_t mfpvr(void)
+{
+ uint32_t pvr;
+
+ asm ("mfpvr %0"
+ : "=r"(pvr));
+ return pvr;
+}
+
+static void alter_insns(uint64_t *word, uint64_t flags, bool on)
+{
+ if (on) {
+ *word |= flags;
+ } else {
+ *word &= ~flags;
+ }
+}
+
+const ppc_def_t *kvmppc_host_cpu_def(void)
+{
+ uint32_t host_pvr = mfpvr();
+ const ppc_def_t *base_spec;
+ ppc_def_t *spec;
+ uint32_t vmx = kvmppc_get_vmx();
+ uint32_t dfp = kvmppc_get_dfp();
+
+ base_spec = ppc_find_by_pvr(host_pvr);
+
+ spec = g_malloc0(sizeof(*spec));
+ memcpy(spec, base_spec, sizeof(*spec));
+
+ /* Now fix up the spec with information we can query from the host */
+
+ if (vmx != -1) {
+ /* Only override when we know what the host supports */
+ alter_insns(&spec->insns_flags, PPC_ALTIVEC, vmx > 0);
+ alter_insns(&spec->insns_flags2, PPC2_VSX, vmx > 1);
+ }
+ if (dfp != -1) {
+ /* Only override when we know what the host supports */
+ alter_insns(&spec->insns_flags2, PPC2_DFP, dfp);
+ }
+
+ return spec;
+}
+
bool kvm_arch_stop_on_emulation_error(CPUState *env)
{
return true;
projects / qemu.git / blobdiff