Searched hist:"1 d6d6802dd547c8b378a9a47572ee72e68cceb3b" (Results 1 – 4 of 4) sorted by relevance
| /rk3399_ARM-atf/bl31/aarch64/ |
| H A D | ea_delegate.S | 1d6d6802dd547c8b378a9a47572ee72e68cceb3b Tue Dec 06 09:03:42 UTC 2022 Boyan Karatotev <boyan.karatotev@arm.com> fix(pmu): unconditionally save PMCR_EL0
Reading back a RES0 bit does not necessarily mean it will be read as 0.
The Arm ARM explicitly warns against doing this. The PMU initialisation
code tries to set such bits to 1 (in MDCR_EL3) regardless of whether
they are in use or are RES0, checking their value could be wrong and
PMCR_EL0 might not end up being saved.
Save PMCR_EL0 unconditionally to prevent this. Remove the security state
change as the outgoing state is not relevant to what the root world
context should look like.
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
Change-Id: Id43667d37b0e2da3ded0beaf23fa0d4f9013f470
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| H A D | runtime_exceptions.S | 1d6d6802dd547c8b378a9a47572ee72e68cceb3b Tue Dec 06 09:03:42 UTC 2022 Boyan Karatotev <boyan.karatotev@arm.com> fix(pmu): unconditionally save PMCR_EL0
Reading back a RES0 bit does not necessarily mean it will be read as 0.
The Arm ARM explicitly warns against doing this. The PMU initialisation
code tries to set such bits to 1 (in MDCR_EL3) regardless of whether
they are in use or are RES0, checking their value could be wrong and
PMCR_EL0 might not end up being saved.
Save PMCR_EL0 unconditionally to prevent this. Remove the security state
change as the outgoing state is not relevant to what the root world
context should look like.
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
Change-Id: Id43667d37b0e2da3ded0beaf23fa0d4f9013f470
|
| /rk3399_ARM-atf/bl1/aarch64/ |
| H A D | bl1_exceptions.S | 1d6d6802dd547c8b378a9a47572ee72e68cceb3b Tue Dec 06 09:03:42 UTC 2022 Boyan Karatotev <boyan.karatotev@arm.com> fix(pmu): unconditionally save PMCR_EL0
Reading back a RES0 bit does not necessarily mean it will be read as 0.
The Arm ARM explicitly warns against doing this. The PMU initialisation
code tries to set such bits to 1 (in MDCR_EL3) regardless of whether
they are in use or are RES0, checking their value could be wrong and
PMCR_EL0 might not end up being saved.
Save PMCR_EL0 unconditionally to prevent this. Remove the security state
change as the outgoing state is not relevant to what the root world
context should look like.
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
Change-Id: Id43667d37b0e2da3ded0beaf23fa0d4f9013f470
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| /rk3399_ARM-atf/lib/el3_runtime/aarch64/ |
| H A D | context.S | 1d6d6802dd547c8b378a9a47572ee72e68cceb3b Tue Dec 06 09:03:42 UTC 2022 Boyan Karatotev <boyan.karatotev@arm.com> fix(pmu): unconditionally save PMCR_EL0
Reading back a RES0 bit does not necessarily mean it will be read as 0.
The Arm ARM explicitly warns against doing this. The PMU initialisation
code tries to set such bits to 1 (in MDCR_EL3) regardless of whether
they are in use or are RES0, checking their value could be wrong and
PMCR_EL0 might not end up being saved.
Save PMCR_EL0 unconditionally to prevent this. Remove the security state
change as the outgoing state is not relevant to what the root world
context should look like.
Signed-off-by: Boyan Karatotev <boyan.karatotev@arm.com>
Change-Id: Id43667d37b0e2da3ded0beaf23fa0d4f9013f470
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