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hv:remove accessing shared log buffer cases between stac/clac

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Shared buffer is allocated by VM and is protected by SMAP.
Accessing to shared buffer between stac/clac pair will invalidate
SMAP protection.This patch is to remove these cases.
Fix minor stac/clac mis-usage,and add comments as stac/clac usage BKM

Tracked-On: #2526
Signed-off-by: Yonghua Huang <yonghua.huang@intel.com>
Reviewed-by: Yin Fengwei <fengwei.yin@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Yonghua Huang
2019-04-30 21:28:36 +08:00
committed by wenlingz
parent 321ad5c374
commit be2fe2a44d
5 changed files with 17 additions and 9 deletions
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5
hypervisor/arch/x86/guest/ept.c
View File

@@ -49,11 +49,8 @@ uint64_t local_gpa2hpa(struct acrn_vm *vm, uint64_t gpa, uint32_t *size)
if (pgentry != NULL) {
hpa = ((*pgentry & (~(pg_size - 1UL)))
| (gpa & (pg_size - 1UL)));
pr_dbg("GPA2HPA: 0x%llx->0x%llx", gpa, hpa);
} else {
pr_err("VM %d GPA2HPA: failed for gpa 0x%llx",
vm->vm_id, gpa);
}
/**
* If specified parameter size is not NULL and
* the HPA of parameter gpa is found, pg_size shall

1
hypervisor/arch/x86/seed/seed_sbl.c
View File

@@ -94,7 +94,6 @@ bool parse_seed_sbl(uint64_t addr, struct physical_seed *phy_seed)
*/
if ((entry->index != dseed_index) ||
(entry->index >= BOOTLOADER_SEED_MAX_ENTRIES)) {
pr_warn("%s: Invalid seed index.", __func__);
status = false;
break;
}