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hv: reserve hypervisor region in e820 table

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Mark hypervisor memory region as unusable in its e820 table to avoid
being overlapped by e820_alloc_memory(). As it is already filtered out
in hypervisor e820 table, there is no longer need to filter it out in
service VM e820.

Tracked-On: #8738
Signed-off-by: Jiaqing Zhao <jiaqing.zhao@linux.intel.com>
Reviewed-by: Fei Li <fei1.li@intel.com>
This commit is contained in:
Jiaqing Zhao 2024-09-18 08:18:29 +00:00
parent a8715330d1
commit d0213fdf39
No known key found for this signature in database
GPG Key ID: 417F6A489F7DAFDD
2 changed files with 46 additions and 28 deletions
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70
hypervisor/arch/x86/e820.c
View File

@ -10,6 +10,7 @@
#include <asm/e820.h>
#include <asm/mmu.h>
#include <boot.h>
#include <reloc.h>
#include <efi_mmap.h>
#include <logmsg.h>
#include <asm/guest/ept.h>
@ -232,6 +233,47 @@ static void calculate_e820_ram_size(void)
dev_dbg(DBG_LEVEL_E820, "ram size: 0x%016lx ",hv_e820_ram_size);
}
static void reserve_e820_region(uint64_t start_hpa, uint64_t end_hpa)
{
uint32_t e820_index;
uint64_t entry_start, entry_end;
for (e820_index = 0; e820_index < hv_e820_entries_nr; e820_index++) {
entry_start = hv_e820[e820_index].baseaddr;
entry_end = hv_e820[e820_index].baseaddr + hv_e820[e820_index].length;
/* No need handle in these cases*/
if ((hv_e820[e820_index].type != E820_TYPE_RAM) || (entry_end <= start_hpa) || (entry_start >= end_hpa)) {
continue;
}
if ((entry_start <= start_hpa) && (entry_end >= end_hpa)) {
hv_e820[e820_index].length = start_hpa - entry_start;
if (end_hpa < entry_end) {
/*
* .......|start_hpa......................end_hpa|.....
* |entry_start..............................entry_end|
*/
insert_e820_entry(e820_index + 1, end_hpa, entry_end - end_hpa, E820_TYPE_RAM);
}
} else {
panic("%s: region 0x%016x-0x%016x crosses multiple e820 entries, check your bootloader!",
__func__, entry_start, entry_end);
}
}
}
static void alloc_hv_memory(void)
{
uint64_t hv_start = hva2hpa((void *)(get_hv_image_base()));
uint64_t hv_end = hv_start + get_hv_image_size();
pr_err("%s: hv start: 0x%016x, end: 0x%016x", __func__, hv_start, hv_end);
reserve_e820_region(hv_start, hv_end);
}
static void alloc_mods_memory(void)
{
uint32_t mod_index, e820_index, target_index;
@ -242,32 +284,11 @@ static void alloc_mods_memory(void)
/* 1st pass: remove the exact region */
for (mod_index = 0; mod_index < abi->mods_count; mod_index++) {
mod_start = hva2hpa(abi->mods[mod_index].start);
mod_end = hva2hpa(abi->mods[mod_index].start) + abi->mods[mod_index].size;
mod_end = mod_start + abi->mods[mod_index].size;
for (e820_index = 0; e820_index < hv_e820_entries_nr; e820_index++) {
entry_start = hv_e820[e820_index].baseaddr;
entry_end = hv_e820[e820_index].baseaddr + hv_e820[e820_index].length;
pr_err("%s: mod %d, start: 0x%016x, end: 0x%016x", __func__, mod_index, mod_start, mod_end);
/* No need handle in these cases*/
if ((hv_e820[e820_index].type != E820_TYPE_RAM) || (entry_end <= mod_start) || (entry_start >= mod_end)) {
continue;
}
if ((entry_start <= mod_start) && (entry_end >= mod_end)) {
hv_e820[e820_index].length = mod_start - entry_start;
if (mod_end < entry_end) {
/*
* .......|start_pa... ....................end_pa|.....
* |entry_start..............................entry_end|
*/
insert_e820_entry(e820_index + 1, mod_end, entry_end - mod_end, E820_TYPE_RAM);
}
} else {
panic("%s: region 0x%016x-0x%016x crosses multiple e820 entries, check your bootloader!",
__func__, entry_start, entry_end);
}
}
reserve_e820_region(mod_start, mod_end);
}
/* 2nd pass: shrink the entries to page boundary */
@ -300,6 +321,7 @@ void init_e820(void)
}
calculate_e820_ram_size();
alloc_hv_memory();
/* reserve multiboot modules memory */
alloc_mods_memory();
}

4
hypervisor/arch/x86/guest/ve820.c
View File

@ -138,8 +138,6 @@ void create_service_vm_e820(struct acrn_vm *vm)
{
uint16_t vm_id;
uint32_t i;
uint64_t hv_start_pa = hva2hpa((void *)(get_hv_image_base()));
uint64_t hv_end_pa = hv_start_pa + get_hv_image_size();
uint32_t entries_count = get_e820_entries_count();
struct acrn_vm_config *service_vm_config = get_vm_config(vm->vm_id);
@ -148,8 +146,6 @@ void create_service_vm_e820(struct acrn_vm *vm)
vm->e820_entry_num = entries_count;
vm->e820_entries = service_vm_e820;
/* filter out hv memory from e820 table */
filter_mem_from_service_vm_e820(vm, hv_start_pa, hv_end_pa);
/* filter out prelaunched vm memory from e820 table */
for (vm_id = 0U; vm_id < CONFIG_MAX_VM_NUM; vm_id++) {