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hv: remove hardcoding of SW SRAM HPA base

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Physical address to SW SRAM region maybe different
 on different platforms, this hardcoded address may
 result in address mismatch for SW SRAM operations.

 This patch removes above hardcoded address and uses
 the physical address parsed from native RTCT.

Tracked-On: #5649
Signed-off-by: Yonghua Huang <yonghua.huang@intel.com>
Reviewed-by: Fei Li <fei1.li@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Yonghua Huang
2021-01-26 22:56:07 +08:00
committed by wenlingz
parent a6420e8cfa
commit a6e666dbe7
5 changed files with 56 additions and 45 deletions
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10
hypervisor/common/hypercall.c
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@@ -583,13 +583,15 @@ static int32_t add_vm_memory_region(struct acrn_vm *vm, struct acrn_vm *target_v
}
/* If Software SRAM is initialized, and HV received a request to map Software SRAM
* area to guest, we should add EPT_WB flag to make Software SRAM effective.
* Assumption: SOS must assign the Software SRAM area as a whole and as a separate memory
* region whose base address is SOFTWARE_SRAM_BASE_HPA
* TODO: We can enforce WB for any region has overlap with Software SRAM, for simplicity,
* and leave it to SOS to make sure it won't violate.
*/
if ((hpa == SOFTWARE_SRAM_BASE_HPA) && is_sw_sram_initialized) {
prot |= EPT_WB;
if (is_sw_sram_initialized) {
base_paddr = get_software_sram_base();
if ((hpa >= base_paddr) &&
((hpa + region->size) <= (base_paddr + get_software_sram_size()))) {
prot |= EPT_WB;
}
}
/* create gpa to hpa EPT mapping */
ept_add_mr(target_vm, pml4_page, hpa,