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SEV: Update ReducedPhysBits

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Updating this field, as `cpuid` provides host level data, which is not
what a guest would expect for Reduced Phsycial Bits. In almost all
cases, we should be using `1` for the value here.

Amend: Adding unit test change.

Fixes: #5006

Signed-off-by: Larry Dewey <larry.dewey@amd.com>
This commit is contained in:
Larry Dewey 2022-08-25 13:43:05 -05:00
parent bd1e8a2a24
commit 67b8f0773f
2 changed files with 2 additions and 2 deletions
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2
src/runtime/virtcontainers/qemu_amd64.go
View File

@ -290,7 +290,7 @@ func (q *qemuAmd64) appendProtectionDevice(devices []govmmQemu.Device, firmware,
Debug: false, Debug: false,
File: firmware, File: firmware,
CBitPos: cpuid.AMDMemEncrypt.CBitPosition, CBitPos: cpuid.AMDMemEncrypt.CBitPosition,
ReducedPhysBits: cpuid.AMDMemEncrypt.PhysAddrReduction, ReducedPhysBits: 1,
}), "", nil }), "", nil
case snpProtection: case snpProtection:
return append(devices, return append(devices,

2
src/runtime/virtcontainers/qemu_amd64_test.go
View File

@ -286,7 +286,7 @@ func TestQemuAmd64AppendProtectionDevice(t *testing.T) {
Debug: false, Debug: false,
File: firmware, File: firmware,
CBitPos: cpuid.AMDMemEncrypt.CBitPosition, CBitPos: cpuid.AMDMemEncrypt.CBitPosition,
ReducedPhysBits: cpuid.AMDMemEncrypt.PhysAddrReduction, ReducedPhysBits: 1,
}, },
} }