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| author | Seongman Lee <[email protected]> | 2025-05-11 09:23:28 +0000 |
|---|---|---|
| committer | Borislav Petkov (AMD) <[email protected]> | 2025-05-11 09:38:03 +0000 |
| commit | f7387eff4bad33d12719c66c43541c095556ae4e (patch) | |
| tree | 9a0bbfb1dbc673dddf38f9ac5879762eed7d568b /scripts/gcc-plugins/gcc-generate-simple_ipa-pass.h | |
| parent | x86/microcode: Consolidate the loader enablement checking (diff) | |
| download | kernel-f7387eff4bad33d12719c66c43541c095556ae4e.tar.gz kernel-f7387eff4bad33d12719c66c43541c095556ae4e.zip | |
x86/sev: Fix operator precedence in GHCB_MSR_VMPL_REQ_LEVEL macro
The GHCB_MSR_VMPL_REQ_LEVEL macro lacked parentheses around the bitmask
expression, causing the shift operation to bind too early. As a result,
when requesting VMPL1 (e.g., GHCB_MSR_VMPL_REQ_LEVEL(1)), incorrect
values such as 0x000000016 were generated instead of the intended
0x100000016 (the requested VMPL level is specified in GHCBData[39:32]).
Fix the precedence issue by grouping the masked value before applying
the shift.
[ bp: Massage commit message. ]
Fixes: 34ff65901735 ("x86/sev: Use kernel provided SVSM Calling Areas")
Signed-off-by: Seongman Lee <[email protected]>
Signed-off-by: Borislav Petkov (AMD) <[email protected]>
Link: https://lore.kernel.org/[email protected]
Diffstat (limited to 'scripts/gcc-plugins/gcc-generate-simple_ipa-pass.h')
0 files changed, 0 insertions, 0 deletions