diff options
| -rw-r--r-- | usr.sbin/bhyve/mem.c | 50 | ||||
| -rw-r--r-- | usr.sbin/bhyve/mem.h | 1 | ||||
| -rw-r--r-- | usr.sbin/bhyve/pci_emul.c | 31 |
3 files changed, 65 insertions, 17 deletions
diff --git a/usr.sbin/bhyve/mem.c b/usr.sbin/bhyve/mem.c index 27f4782..c2b5ab4 100644 --- a/usr.sbin/bhyve/mem.c +++ b/usr.sbin/bhyve/mem.c @@ -62,7 +62,7 @@ struct mmio_rb_range { struct mmio_rb_tree; RB_PROTOTYPE(mmio_rb_tree, mmio_rb_range, mr_link, mmio_rb_range_compare); -RB_HEAD(mmio_rb_tree, mmio_rb_range) mmio_rbroot; +RB_HEAD(mmio_rb_tree, mmio_rb_range) mmio_rb_root, mmio_rb_fallback; /* * Per-vCPU cache. Since most accesses from a vCPU will be to @@ -82,13 +82,14 @@ mmio_rb_range_compare(struct mmio_rb_range *a, struct mmio_rb_range *b) } static int -mmio_rb_lookup(uint64_t addr, struct mmio_rb_range **entry) +mmio_rb_lookup(struct mmio_rb_tree *rbt, uint64_t addr, + struct mmio_rb_range **entry) { struct mmio_rb_range find, *res; find.mr_base = find.mr_end = addr; - res = RB_FIND(mmio_rb_tree, &mmio_rbroot, &find); + res = RB_FIND(mmio_rb_tree, rbt, &find); if (res != NULL) { *entry = res; @@ -99,11 +100,11 @@ mmio_rb_lookup(uint64_t addr, struct mmio_rb_range **entry) } static int -mmio_rb_add(struct mmio_rb_range *new) +mmio_rb_add(struct mmio_rb_tree *rbt, struct mmio_rb_range *new) { struct mmio_rb_range *overlap; - overlap = RB_INSERT(mmio_rb_tree, &mmio_rbroot, new); + overlap = RB_INSERT(mmio_rb_tree, rbt, new); if (overlap != NULL) { #ifdef RB_DEBUG @@ -120,11 +121,11 @@ mmio_rb_add(struct mmio_rb_range *new) #if 0 static void -mmio_rb_dump(void) +mmio_rb_dump(struct mmio_rb_tree *rbt) { struct mmio_rb_range *np; - RB_FOREACH(np, mmio_rb_tree, &mmio_rbroot) { + RB_FOREACH(np, mmio_rb_tree, rbt) { printf(" %lx:%lx, %s\n", np->mr_base, np->mr_end, np->mr_param.name); } @@ -172,22 +173,22 @@ emulate_mem(struct vmctx *ctx, int vcpu, uint64_t paddr, struct vie *vie) entry = NULL; if (entry == NULL) { - if (mmio_rb_lookup(paddr, &entry)) + if (!mmio_rb_lookup(&mmio_rb_root, paddr, &entry)) { + /* Update the per-vCPU cache */ + mmio_hint[vcpu] = entry; + } else if (mmio_rb_lookup(&mmio_rb_fallback, paddr, &entry)) { return (ESRCH); - - /* Update the per-vCPU cache */ - mmio_hint[vcpu] = entry; + } } - assert(entry != NULL && entry == mmio_hint[vcpu]); - + assert(entry != NULL); err = vmm_emulate_instruction(ctx, vcpu, paddr, vie, mem_read, mem_write, &entry->mr_param); return (err); } -int -register_mem(struct mem_range *memp) +static int +register_mem_int(struct mmio_rb_tree *rbt, struct mem_range *memp) { struct mmio_rb_range *mrp; int err; @@ -201,7 +202,7 @@ register_mem(struct mem_range *memp) mrp->mr_base = memp->base; mrp->mr_end = memp->base + memp->size - 1; - err = mmio_rb_add(mrp); + err = mmio_rb_add(rbt, mrp); if (err) free(mrp); } else @@ -210,9 +211,24 @@ register_mem(struct mem_range *memp) return (err); } +int +register_mem(struct mem_range *memp) +{ + + return (register_mem_int(&mmio_rb_root, memp)); +} + +int +register_mem_fallback(struct mem_range *memp) +{ + + return (register_mem_int(&mmio_rb_fallback, memp)); +} + void init_mem(void) { - RB_INIT(&mmio_rbroot); + RB_INIT(&mmio_rb_root); + RB_INIT(&mmio_rb_fallback); } diff --git a/usr.sbin/bhyve/mem.h b/usr.sbin/bhyve/mem.h index 88fafe1..05e7508 100644 --- a/usr.sbin/bhyve/mem.h +++ b/usr.sbin/bhyve/mem.h @@ -53,5 +53,6 @@ void init_mem(void); int emulate_mem(struct vmctx *, int vcpu, uint64_t paddr, struct vie *vie); int register_mem(struct mem_range *memp); +int register_mem_fallback(struct mem_range *memp); #endif /* _MEM_H_ */ diff --git a/usr.sbin/bhyve/pci_emul.c b/usr.sbin/bhyve/pci_emul.c index d883a54..cb09b7c 100644 --- a/usr.sbin/bhyve/pci_emul.c +++ b/usr.sbin/bhyve/pci_emul.c @@ -846,12 +846,29 @@ pci_emul_iscap(struct pci_devinst *pi, int offset) return (found); } +static int +pci_emul_fallback_handler(struct vmctx *ctx, int vcpu, int dir, uint64_t addr, + int size, uint64_t *val, void *arg1, long arg2) +{ + /* + * Ignore writes; return 0xff's for reads. The mem read code + * will take care of truncating to the correct size. + */ + if (dir == MEM_F_READ) { + *val = 0xffffffffffffffff; + } + + return (0); +} + void init_pci(struct vmctx *ctx) { + struct mem_range memp; struct pci_devemu *pde; struct slotinfo *si; int slot, func; + int error; pci_emul_iobase = PCI_EMUL_IOBASE; pci_emul_membase32 = PCI_EMUL_MEMBASE32; @@ -879,6 +896,20 @@ init_pci(struct vmctx *ctx) lirq[11].li_generic = 1; lirq[12].li_generic = 1; lirq[15].li_generic = 1; + + /* + * Setup the PCI hole to return 0xff's when accessed in a region + * with no devices + */ + memset(&memp, 0, sizeof(struct mem_range)); + memp.name = "PCI hole"; + memp.flags = MEM_F_RW; + memp.base = lomem_sz; + memp.size = (4ULL * 1024 * 1024 * 1024) - lomem_sz; + memp.handler = pci_emul_fallback_handler; + + error = register_mem_fallback(&memp); + assert(error == 0); } int |
