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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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hypervisor/arch/x86/seed/seed_sbl.c
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@@ -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;
}