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hv: pSRAM: add pSRAM support for pre-launched RTVM

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1.Modified the virtual e820 table for pre-launched VM. We added a
segment for pSRAM, and thus lowmem RAM is split into two parts.
Logics are added to deal with the split.
2.Added EPT mapping of pSRAM segment for pre-launched RTVM if it
uses pSRAM.

Tracked-On: #5330
Signed-off-by: Qian Wang <qian1.wang@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Qian Wang
2020-10-27 15:16:58 +08:00
committed by wenlingz
parent 7bd0f7507e
commit 99ee76781f
2 changed files with 78 additions and 28 deletions
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12
hypervisor/arch/x86/guest/vm.c
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@@ -35,6 +35,7 @@
#include <trampoline.h>
#include <assign.h>
#include <vgpio.h>
#include <ptcm.h>
/* Local variables */
@@ -228,7 +229,16 @@ static void prepare_prelaunched_vm_memmap(struct acrn_vm *vm, const struct acrn_
const struct e820_entry *entry = &(vm->e820_entries[i]);
if (entry->length == 0UL) {
break;
continue;
} else {
if (is_psram_initialized && (entry->baseaddr == PSRAM_BASE_GPA) &&
((vm_config->guest_flags & GUEST_FLAG_RT) != 0U)){
/* pass through pSRAM to pre-RTVM */
pr_fatal("%s, %d___", __func__, __LINE__);
ept_add_mr(vm, (uint64_t *)vm->arch_vm.nworld_eptp,
PSRAM_BASE_HPA, PSRAM_BASE_GPA, PSRAM_MAX_SIZE, EPT_RWX | EPT_WB);
continue;
}
}
if (remaining_hpa_size >= entry->length) {