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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/common/hypercall.c
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@@ -1177,7 +1177,6 @@ int32_t hcall_vm_intr_monitor(struct acrn_vm *vm, uint16_t vmid, uint64_t param)
}
status = 0;
pr_dbg("intr monitor:%d, cnt=%d", intr_hdr->cmd, intr_hdr->buf_cnt);
}
clac();
}