Min Xu 7012cb73c4 MdePkg: Probe Cc guest in BaseIoLibIntrinsicSev ... BZ: https://bugzilla.tianocore.org/show_bug.cgi?id=3902 Bad IO performance in SEC phase is observed after TDX features was introduced. (after commit b6b2de8848 - "MdePkg: Support mmio for Tdx guest in BaseIoLibIntrinsic"). This is because IsTdxGuest() will be called in each MMIO operation. It is trying to cache the result of the probe in the efi data segment. However, that doesn't work in SEC, because the data segment is read only (so the write seems to succeed but a read will always return the original value), leading to us calling TdIsEnabled() check for every mmio we do, which is causing the slowdown because it's very expensive. This patch is to call CcProbe instead of TdIsEnabled in IsTdxGuest. Null instance of CcProbe always returns CCGuestTypeNonEncrypted. Its OvmfPkg version returns the guest type in Ovmf work area. Cc: Michael D Kinney <michael.d.kinney@intel.com> Cc: Liming Gao <gaoliming@byosoft.com.cn> Cc: Zhiguang Liu <zhiguang.liu@intel.com> Cc: James Bottomley <jejb@linux.ibm.com> Cc: James Bottomley <James.Bottomley@HansenPartnership.com> Cc: Jiewen Yao <jiewen.yao@intel.com> Cc: Gerd Hoffmann <kraxel@redhat.com> Reviewed-by: Liming Gao <gaoliming@byosoft.com.cn> Reviewed-by: Jiewen Yao <jiewen.yao@intel.com> Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Min Xu <min.m.xu@intel.com>		2022-04-19 01:26:08 +00:00
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Include	MdePkg: Add CcProbeLibNull	2022-04-19 01:26:08 +00:00
Library	MdePkg: Probe Cc guest in BaseIoLibIntrinsicSev	2022-04-19 01:26:08 +00:00
Test	MdePkg: Apply uncrustify changes	2021-12-07 17:24:28 +00:00
MdeLibs.dsc.inc	MdePkg: Add MdeLibs.dsc.inc file to MdePkg	2021-03-30 12:48:30 +00:00
MdePkg.ci.yaml	MdePkg: Update YAML to ignore specific ECC files/errors	2021-11-30 14:19:07 +00:00
MdePkg.dec	MdePkg: Add CcProbeLibNull	2022-04-19 01:26:08 +00:00
MdePkg.dsc	MdePkg: Add CcProbeLibNull	2022-04-19 01:26:08 +00:00
MdePkg.uni	MdePkg: Add PcdSpeculationBarrierType	2019-04-30 16:39:09 -07:00
MdePkgExtra.uni	MdePkg: Replace BSD License with BSD+Patent License	2019-04-09 10:58:13 -07:00