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dm: add BIOS/ROM image loading support at High BIOS region

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Generic infrastructure for loading BIOS/ROM and providing EPT pages at
High BIOS region.

The size of High BIOS is rounded up to a multiple of 2MB.

v2 -> v3:
- refine mmap_hugetlbfs* to reduce code replication

v1 -> v2:
- make this code generic instead of OVMF-specific

Tracked-On: #1832
Signed-off-by: Peter Fang <peter.fang@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
This commit is contained in:
Peter Fang
2018-12-12 01:39:42 -08:00
committed by wenlingz
parent 653a57958b
commit 9e97fd0680
5 changed files with 138 additions and 58 deletions
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devicemodel/include/dm.h
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@@ -58,6 +58,7 @@ int vmexit_task_switch(struct vmctx *ctx, struct vhm_request *vhm_req,
*/
void *paddr_guest2host(struct vmctx *ctx, uintptr_t gaddr, size_t len);
int virtio_uses_msix(void);
size_t high_bios_size(void);
void ptdev_no_reset(bool enable);
void init_debugexit(void);
void deinit_debugexit(void);