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| author | Marc Zyngier <[email protected]> | 2020-04-01 11:38:49 +0000 |
|---|---|---|
| committer | Marc Zyngier <[email protected]> | 2020-04-17 08:51:45 +0000 |
| commit | fdc9999e20cd038d9d5bf54496c1f0226bc2b64e (patch) | |
| tree | 905fb6601f8580c9fc5434d81ffd3a766e03cba1 /tools/perf/scripts/python/stackcollapse.py | |
| parent | KVM: arm64: PSCI: Narrow input registers when using 32bit functions (diff) | |
| download | kernel-fdc9999e20cd038d9d5bf54496c1f0226bc2b64e.tar.gz kernel-fdc9999e20cd038d9d5bf54496c1f0226bc2b64e.zip | |
KVM: arm64: PSCI: Forbid 64bit functions for 32bit guests
Implementing (and even advertising) 64bit PSCI functions to 32bit
guests is at least a bit odd, if not altogether violating the
spec which says ("5.2.1 Register usage in arguments and return values"):
"Adherence to the SMC Calling Conventions implies that any AArch32
caller of an SMC64 function will get a return code of 0xFFFFFFFF(int32).
This matches the NOT_SUPPORTED error code used in PSCI"
Tighten the implementation by pretending these functions are not
there for 32bit guests.
Reviewed-by: Christoffer Dall <[email protected]>
Reviewed-by: Alexandru Elisei <[email protected]>
Signed-off-by: Marc Zyngier <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions