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Fix lstopo

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Lstopo doesn't have system memory mappings at low addresses. Make
sure we leave enough GPUVM address space for kernel allocations
(currently only CWSR) before the start of the user-managed SVM
aperture.

Change-Id: Ic197f7bd5a3cfb150a0da2bfdbc848664e7869be


[ROCm/ROCR-Runtime commit: cac0c08496]
This commit is contained in:
Felix Kuehling
2016-03-10 14:37:53 -05:00
committed by Gerrit Code Review
parent 6409b00f8f
commit 68f1b37518
1 changed files with 5 additions and 2 deletions
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projects/rocr-runtime/src/fmm.c
+5 -2
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@@ -1787,6 +1787,9 @@ err:
return ret;
}
#define DGPU_APERTURE_ADDR_MIN 0x1000000 /* Leave at least 16MB for kernel */
#define DGPU_APERTURE_ADDR_INC 0x200000 /* Search in huge-page increments */
static HSAKMT_STATUS dgpu_mem_init(uint32_t gpu_mem_id, void **base, void **limit)
{
bool found;
@@ -1815,9 +1818,9 @@ static HSAKMT_STATUS dgpu_mem_init(uint32_t gpu_mem_id, void **base, void **limi
found = false;
for (len = max_vm_limit+1; !found && len >= min_vm_size; len >>= 1) {
for (addr = (void *)TONGA_PAGE_SIZE, ret_addr = NULL;
for (addr = (void *)DGPU_APERTURE_ADDR_MIN, ret_addr = NULL;
(HSAuint64)addr + (len >> 1) < max_vm_limit;
addr = (void *)((HSAuint64)addr + TONGA_PAGE_SIZE)) {
addr = (void *)((HSAuint64)addr + DGPU_APERTURE_ADDR_INC)) {
ret_addr = reserve_address(addr, len);
if (!ret_addr)
break;