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| author | Star Zeng <star.zeng@intel.com> | 2018-06-05 16:04:38 +0800 |
|---|---|---|
| committer | Star Zeng <star.zeng@intel.com> | 2018-06-06 12:46:43 +0800 |
| commit | 8653ea2088a386075c0d65bfc891ad3c8072db9f (patch) | |
| tree | 2582a9657ddb9cfcb48b6f350645de732470c38a /IntelSiliconPkg/Feature/VTd/IntelVTdDxe/VtdReg.c | |
| parent | 91c31ff04a7a72b4b0e476972ad3c76e03a106a2 (diff) | |
| download | edk2-8653ea2088a386075c0d65bfc891ad3c8072db9f.zip edk2-8653ea2088a386075c0d65bfc891ad3c8072db9f.tar.gz edk2-8653ea2088a386075c0d65bfc891ad3c8072db9f.tar.bz2 | |
IntelSiliconPkg IntelVTdDxe: Fix incorrect code to clear VTd error
According to VTd spec, Software writes the value read from this
field (F) to Clear it. But current code is using 0 to clear the
field, that is incorrect.
And R_FSTS_REG register value clearing should be not in the for loop.
Without this patch, we will see same VTd error message appears again
and again after it occurs first time.
Cc: Jiewen Yao <jiewen.yao@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Star Zeng <star.zeng@intel.com>
Reviewed-by: Jiewen Yao <jiewen.yao@intel.com>
Diffstat (limited to 'IntelSiliconPkg/Feature/VTd/IntelVTdDxe/VtdReg.c')
| -rw-r--r-- | IntelSiliconPkg/Feature/VTd/IntelVTdDxe/VtdReg.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/VtdReg.c b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/VtdReg.c index 8dbc83f..e564d37 100644 --- a/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/VtdReg.c +++ b/IntelSiliconPkg/Feature/VTd/IntelVTdDxe/VtdReg.c @@ -554,11 +554,13 @@ DumpVtdIfError ( for (Index = 0; Index < (UINTN)CapReg.Bits.NFR + 1; Index++) {
FrcdReg.Uint64[1] = MmioRead64 (mVtdUnitInformation[Num].VtdUnitBaseAddress + ((CapReg.Bits.FRO * 16) + (Index * 16) + R_FRCD_REG + sizeof(UINT64)));
if (FrcdReg.Bits.F != 0) {
- FrcdReg.Bits.F = 0;
+ //
+ // Software writes the value read from this field (F) to Clear it.
+ //
MmioWrite64 (mVtdUnitInformation[Num].VtdUnitBaseAddress + ((CapReg.Bits.FRO * 16) + (Index * 16) + R_FRCD_REG + sizeof(UINT64)), FrcdReg.Uint64[1]);
}
- MmioWrite32 (mVtdUnitInformation[Num].VtdUnitBaseAddress + R_FSTS_REG, MmioRead32 (mVtdUnitInformation[Num].VtdUnitBaseAddress + R_FSTS_REG));
}
+ MmioWrite32 (mVtdUnitInformation[Num].VtdUnitBaseAddress + R_FSTS_REG, MmioRead32 (mVtdUnitInformation[Num].VtdUnitBaseAddress + R_FSTS_REG));
}
}
}
|