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dm:gvt:reserve gvt bar regions in ACRN-DM

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The current design has the following problem:
gvt uses some pci bar regions,
but ACRN-DM isn't aware of these regions.
So ACRN-DM may allocate these regions for other pci devices,
which will result in other pci devices bar regions
overlap with gvt bar regions.

The new design is the following:
(1) ACRN-DM reads gvt bar regions
which are provided by physical gpu;
(2) ACRN-DM reserves gvt bar regions

v6 -> v7:
	* use array to store reserved bar regions
	* rename some struct and func

v5 -> v6:
	* rename enable_gvt to gvt_enabled
	* add a interface to reserve bar regions
	* reserve gvt bar regions

Tracked-On: projectacrn#4005

Signed-off-by: Junming Liu <junming.liu@intel.com>
Reviewed-by: Zhao Yakui <yakui.zhao@intel.com>
Reviewed-by: Liu XinYun <xinyun.liu@intel.com>
Reviewed-by: Shuo A Liu <shuo.a.liu@intel.com>
Acked-by: Yu Wang <yu1.wang@intel.com>
This commit is contained in:
Junming Liu
2019-11-12 19:18:50 +00:00
committed by wenlingz
parent 72644ac2b2
commit 1ac0b57c6a
5 changed files with 146 additions and 0 deletions
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1
devicemodel/core/vmmapi.c
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@@ -128,6 +128,7 @@ vm_create(const char *name, uint64_t req_buf, int *vcpu_num)
/* Pass uuid as parameter of create vm*/
uuid_copy(create_vm.uuid, vm_uuid);
ctx->gvt_enabled = false;
ctx->fd = devfd;
ctx->lowmem_limit = 2 * GB;
ctx->highmem_gpa_base = PCI_EMUL_MEMLIMIT64;