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nova: support write combining

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Fixes #1566
This commit is contained in:
Alexander Boettcher
2015-08-25 11:46:32 +02:00
committed by Christian Helmuth
parent e304bd926e
commit 0f2c2a675a
7 changed files with 24 additions and 16 deletions
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12
repos/base-nova/include/nova/syscall-generic.h
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@@ -540,7 +540,8 @@ namespace Nova {
bool kern_pd = false,
bool update_guest_pt = false,
bool translate_map = false,
bool dma_mem = false)
bool dma_mem = false,
bool write_combined = false)
{
/* transfer items start at the end of the UTCB */
items += 1 << 16;
@@ -556,16 +557,19 @@ namespace Nova {
/* map from hypervisor or current pd */
unsigned h = kern_pd ? (1 << 11) : 0;
/* map write-combined */
unsigned wc = write_combined ? (1 << 10) : 0;
/* update guest page table */
unsigned g = update_guest_pt ? (1 << 10) : 0;
unsigned g = update_guest_pt ? (1 << 9) : 0;
/* mark memory dma able */
unsigned d = dma_mem ? (1 << 9) : 0;
unsigned d = dma_mem ? (1 << 8) : 0;
/* set type of delegation, either 'map' or 'translate and map' */
unsigned m = translate_map ? 2 : 1;
item->hotspot = crd.hotspot(sel_hotspot) | g | h | d | m;
item->hotspot = crd.hotspot(sel_hotspot) | g | h | wc | d | m;
item->crd = crd.value();
return true;