diff options
| author |   Damjan Marion <damarion@cisco.com> | 2019-02-21 14:44:59 +0100 |
|---|---|---|
| committer |   Florin Coras <florin.coras@gmail.com> | 2019-02-21 17:35:35 +0000 |
| commit | 5a6c8096cb51065b056c927133781c9f2db9148d (patch) | |
| tree | 7eabb5921aeebf1d1eebc9f892aae6b0d1a989f0 /src/vlib/physmem.c | |
| parent | 30307af14583f6955eacafe73c3001164ee58a07 (diff) | |
physmem: keep physmem VA in 39-bit address space on x86_64
Some x86 CPUs have IOMMU capable dealing only with 39-bit address space
This patch also adds option to specify physmem base address from
startup.conf
Change-Id: I9e8abd26efb60e9c4ad54c035fb1751a4a61f4dc
Signed-off-by: Damjan Marion <damarion@cisco.com>
Diffstat (limited to 'src/vlib/physmem.c')
| -rwxr-xr-x | src/vlib/physmem.c | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/src/vlib/physmem.c b/src/vlib/physmem.c index 21fe44fc1ca..64920e1ebe2 100755 --- a/src/vlib/physmem.c +++ b/src/vlib/physmem.c @@ -29,6 +29,15 @@ #include <vlib/pci/pci.h> #include <vlib/linux/vfio.h> +#ifdef __x86_64__ +/* we keep physmem in low 38 bits of VA address space as some + IOMMU implamentation cannot map above that range */ +#define VLIB_PHYSMEM_DEFAULT_BASE_ADDDR (1ULL << 36) +#else +/* let kernel decide */ +#define VLIB_PHYSMEM_DEFAULT_BASE_ADDDR 0 +#endif + clib_error_t * vlib_physmem_shared_map_create (vlib_main_t * vm, char *name, uword size, u32 log2_page_sz, u32 numa_node, @@ -102,7 +111,11 @@ vlib_physmem_init (vlib_main_t * vm) CLIB_CACHE_LINE_BYTES); memset (p, 0, sizeof (clib_pmalloc_main_t)); vpm->pmalloc_main = (clib_pmalloc_main_t *) p; - clib_pmalloc_init (vpm->pmalloc_main, 0); + + if (vpm->base_addr == 0) + vpm->base_addr = VLIB_PHYSMEM_DEFAULT_BASE_ADDDR; + + clib_pmalloc_init (vpm->pmalloc_main, vpm->base_addr, 0); return error; } @@ -151,6 +164,25 @@ VLIB_CLI_COMMAND (show_physmem_command, static) = { }; /* *INDENT-ON* */ +static clib_error_t * +vlib_physmem_config (vlib_main_t * vm, unformat_input_t * input) +{ + vlib_physmem_main_t *vpm = &vm->physmem_main; + + while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) + { + if (unformat (input, "base-addr 0x%lx", &vpm->base_addr)) + ; + else + return unformat_parse_error (input); + } + + unformat_free (input); + return 0; +} + +VLIB_EARLY_CONFIG_FUNCTION (vlib_physmem_config, "physmem"); + /* * fd.io coding-style-patch-verification: ON * |