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hv: pSRAM: add pSRAM support for pre-launched RTVM
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>
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Qian Wang
wenlingz
parent
7bd0f7507e
commit
99ee76781f
@ -10,9 +10,12 @@
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#include <reloc.h>
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#include <vacpi.h>
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#include <logmsg.h>
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#include <ptcm.h>
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#define ENTRY_HPA1 2U
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#define ENTRY_HPA1_HI 6U
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#define ENTRY_HPA1_LOW_PART1 2U
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#define ENTRY_HPA1_LOW_PART2 4U
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#define ENTRY_PSRAM 3U
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#define ENTRY_HPA1_HI 8U
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static struct e820_entry sos_vm_e820[E820_MAX_ENTRIES];
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static struct e820_entry pre_vm_e820[PRE_VM_NUM][E820_MAX_ENTRIES];
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@ -130,9 +133,20 @@ static const struct e820_entry pre_ve820_template[E820_MAX_ENTRIES] = {
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.length = 0x10000UL, /* 64KB */
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.type = E820_TYPE_RESERVED
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},
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{ /* hpa1 */
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.baseaddr = 0x100000UL, /* 1MB */
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.length = (MEM_2G - MEM_2M),
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/* pSRAM segment splits the lowmem into two parts */
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{ /* part1 of lowmem of hpa1*/
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.baseaddr = MEM_1M, /* 1MB */
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.length = PSRAM_BASE_GPA - MEM_1M,
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.type = E820_TYPE_RAM
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},
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{ /* pSRAM */
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.baseaddr = PSRAM_BASE_GPA,
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.length = PSRAM_MAX_SIZE,
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.type = E820_TYPE_RESERVED
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},
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{ /* part2 of lowmem of hpa1*/
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.baseaddr = PSRAM_BASE_GPA + PSRAM_MAX_SIZE,
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.length = MEM_2G - MEM_1M - (PSRAM_BASE_GPA + PSRAM_MAX_SIZE),
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.type = E820_TYPE_RAM
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},
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{ /* ACPI Reclaim */
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@ -170,23 +184,37 @@ static inline uint64_t add_ram_entry(struct e820_entry *entry, uint64_t gpa, uin
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*
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* entry0: usable under 1MB
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* entry1: reserved for MP Table/ACPI RSDP from 0xf0000 to 0xfffff
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* entry2: usable for hpa1 or hpa1_lo from 0x100000
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* entry3: ACPI Reclaim from 0x7ff00000 to 0x7ffeffff
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* entry4: ACPI NVS from 0x7fff0000 to 0x7fffffff
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* entry5: reserved for 32bit PCI hole from 0x80000000 to 0xffffffff
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* (entry6): usable for
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* a) hpa1_hi, if hpa1 > 2GB
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* b) hpa2, if (hpa1 + hpa2) < 2GB
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* c) hpa2_lo, if hpa1 < 2GB and (hpa1 + hpa2) > 2GB
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* (entry7): usable for
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* a) hpa2, if hpa1 > 2GB
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* b) hpa2_hi, if hpa1 < 2GB and (hpa1 + hpa2) > 2GB
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* entry2: usable, the part1 of hpa1 in lowmem, from 0x100000, and up to the bottom of pSRAM area.
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* entry3: reserved, pSRAM segment, which will be identically mapped to physical pSRAM segment rather than hpa1.
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* entry4: usable, the part2 of hpa1 in lowmem, from the ceil of pSRAM segment, and up to 2G-1M.
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* entry5: ACPI Reclaim from 0x7ff00000 to 0x7ffeffff
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* entry6: ACPI NVS from 0x7fff0000 to 0x7fffffff
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* entry7: reserved for 32bit PCI hole from 0x80000000 to 0xffffffff
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* (entry8): usable for
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* a) hpa1_hi, if hpa1 > 2GB - PSRAM_MAX_SIZE
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* b) hpa2, if (hpa1 + hpa2) < 2GB - PSRAM_MAX_SIZE
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* c) hpa2_lo, if hpa1 < 2GB - PSRAM_MAX_SIZE and (hpa1 + hpa2) > 2GB - PSRAM_MAX_SIZE
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* (entry9): usable for
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* a) hpa2, if hpa1 > 2GB - PSRAM_MAX_SIZE
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* b) hpa2_hi, if hpa1 < 2GB - PSRAM_MAX_SIZE and (hpa1 + hpa2) > 2GB - PSRAM_MAX_SIZE
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*/
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/*
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The actual memory mapping under 2G looks like below:
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|<--1M-->|
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|<-----hpa1_low_part1--->|
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|<---pSRAM--->|
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|<-----hpa1_low_part2--->|
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|<---Non-mapped hole (if there is)-->|
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|<---1M ACPI NVS/DATA--->|
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*/
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void create_prelaunched_vm_e820(struct acrn_vm *vm)
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{
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struct acrn_vm_config *vm_config = get_vm_config(vm->vm_id);
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uint64_t gpa_start = 0x100000000UL;
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uint64_t hpa1_hi_size, hpa2_lo_size;
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uint64_t lowmem_max_length = MEM_2G - PSRAM_MAX_SIZE;
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uint64_t hpa1_part1_max_length = PSRAM_BASE_GPA - MEM_1M;
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uint64_t remaining_hpa2_size = vm_config->memory.size_hpa2;
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uint32_t entry_idx = ENTRY_HPA1_HI;
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@ -195,24 +223,36 @@ void create_prelaunched_vm_e820(struct acrn_vm *vm)
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(const void *)pre_ve820_template, E820_MAX_ENTRIES * sizeof(struct e820_entry));
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/* sanitize entry for hpa1 */
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if (vm_config->memory.size > MEM_2G) {
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if (vm_config->memory.size > lowmem_max_length) {
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/* need to split hpa1 and add an entry for hpa1_hi */
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hpa1_hi_size = vm_config->memory.size - MEM_2G;
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hpa1_hi_size = vm_config->memory.size - lowmem_max_length;
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gpa_start = add_ram_entry((vm->e820_entries + entry_idx), gpa_start, hpa1_hi_size);
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entry_idx++;
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} else if (vm_config->memory.size <= MEM_1M + hpa1_part1_max_length + MEM_1M) {
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/* in this case, hpa1 is only enough for the first 1M + part1 + last 1M (ACPI NVS/DATA), so part2 will be empty */
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vm->e820_entries[ENTRY_HPA1_LOW_PART1].length = vm_config->memory.size - MEM_2M; /* 2M includes the first and last 1M */
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vm->e820_entries[ENTRY_HPA1_LOW_PART2].length = 0;
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} else {
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/* need to revise length of hpa1 entry to its actual size, excluding size of low 1MB and ACPI space */
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vm->e820_entries[ENTRY_HPA1].length = vm_config->memory.size - MEM_2M;
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/* Otherwise, part2 is not empty. */
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vm->e820_entries[ENTRY_HPA1_LOW_PART2].length = vm_config->memory.size - PSRAM_BASE_GPA - MEM_1M;
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/* need to set gpa_start for hpa2 */
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gpa_start = vm->e820_entries[ENTRY_HPA1].baseaddr + vm->e820_entries[ENTRY_HPA1].length;
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if ((vm_config->memory.size < MEM_2G)
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&& (remaining_hpa2_size > (MEM_2G - vm_config->memory.size))) {
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/* need to split hpa2 and add an entry for hpa2_lo */
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hpa2_lo_size = remaining_hpa2_size - (MEM_2G - vm_config->memory.size);
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gpa_start = add_ram_entry((vm->e820_entries + entry_idx), gpa_start, hpa2_lo_size);
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}
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hpa2_lo_size = (lowmem_max_length - vm_config->memory.size);
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gpa_start = vm->e820_entries[ENTRY_HPA1_LOW_PART2].baseaddr + vm->e820_entries[ENTRY_HPA1_LOW_PART2].length;
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if (hpa2_lo_size > 0 && remaining_hpa2_size > 0) {
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/* In this case, hpa2 may have some parts to be mapped to lowmem, so we add an entry for hpa2_lo */
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if (remaining_hpa2_size > hpa2_lo_size) {
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remaining_hpa2_size -= hpa2_lo_size;
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entry_idx++;
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gpa_start = 0x100000000U;
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}
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else {
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hpa2_lo_size = remaining_hpa2_size;
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remaining_hpa2_size = 0;
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}
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(void)add_ram_entry((vm->e820_entries + entry_idx), gpa_start, hpa2_lo_size);
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entry_idx++;
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}
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/* check whether need an entry for remaining hpa2 */
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@ -35,6 +35,7 @@
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#include <trampoline.h>
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#include <assign.h>
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#include <vgpio.h>
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#include <ptcm.h>
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/* Local variables */
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@ -228,7 +229,16 @@ static void prepare_prelaunched_vm_memmap(struct acrn_vm *vm, const struct acrn_
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const struct e820_entry *entry = &(vm->e820_entries[i]);
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if (entry->length == 0UL) {
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break;
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continue;
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} else {
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if (is_psram_initialized && (entry->baseaddr == PSRAM_BASE_GPA) &&
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((vm_config->guest_flags & GUEST_FLAG_RT) != 0U)){
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/* pass through pSRAM to pre-RTVM */
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pr_fatal("%s, %d___", __func__, __LINE__);
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ept_add_mr(vm, (uint64_t *)vm->arch_vm.nworld_eptp,
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PSRAM_BASE_HPA, PSRAM_BASE_GPA, PSRAM_MAX_SIZE, EPT_RWX | EPT_WB);
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continue;
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}
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}
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if (remaining_hpa_size >= entry->length) {
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