Searched hist:ce08459a1c8eac243e79c0104c554ee740434552 (Results 1 – 6 of 6) sorted by relevance
| /optee_os/core/arch/arm/include/kernel/ |
| H A D | thread_arch.h | ce08459a1c8eac243e79c0104c554ee740434552 Thu Mar 24 19:59:55 UTC 2022 Jens Wiklander <jens.wiklander@linaro.org> core: arm: spectre-bhb software workaround
Expands the config option CFG_CORE_WORKAROUND_SPECTRE_BP_SEC to cover
CVE-2022-23960 (aka Spectre-BHB) too since both have much in common.
Spectre-BHB is another speculation attack on branch prediction. Further
details can be found at [1].
The software workaround added for CPUs vulnerable to Spectre-V2 covers
Spectre-BHB too. New software workaround is only needed for CPUs immune to
Spectre-V2, but not so to Spectre-BHB.
The Spectre-V2 workaround is to invalidate the entire branch predictor
table. Most new CPU immune to Spectre-V2 but vulnerable to Spectre-BHB
can avoid invalidating the entire branch predictor table, instead is
this invalidation replaced by a loop designed to exhaust the branch
predictor in a way that the exploit isn't possible any longer.
Link: [1] https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability/spectre-bhb
Fixes: CVE-2022-23960
Acked-by: Etienne Carriere <etienne.carriere@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
|
| H A D | thread_private_arch.h | ce08459a1c8eac243e79c0104c554ee740434552 Thu Mar 24 19:59:55 UTC 2022 Jens Wiklander <jens.wiklander@linaro.org> core: arm: spectre-bhb software workaround
Expands the config option CFG_CORE_WORKAROUND_SPECTRE_BP_SEC to cover
CVE-2022-23960 (aka Spectre-BHB) too since both have much in common.
Spectre-BHB is another speculation attack on branch prediction. Further
details can be found at [1].
The software workaround added for CPUs vulnerable to Spectre-V2 covers
Spectre-BHB too. New software workaround is only needed for CPUs immune to
Spectre-V2, but not so to Spectre-BHB.
The Spectre-V2 workaround is to invalidate the entire branch predictor
table. Most new CPU immune to Spectre-V2 but vulnerable to Spectre-BHB
can avoid invalidating the entire branch predictor table, instead is
this invalidation replaced by a loop designed to exhaust the branch
predictor in a way that the exploit isn't possible any longer.
Link: [1] https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability/spectre-bhb
Fixes: CVE-2022-23960
Acked-by: Etienne Carriere <etienne.carriere@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
|
| /optee_os/core/arch/arm/kernel/ |
| H A D | asm-defines.c | ce08459a1c8eac243e79c0104c554ee740434552 Thu Mar 24 19:59:55 UTC 2022 Jens Wiklander <jens.wiklander@linaro.org> core: arm: spectre-bhb software workaround
Expands the config option CFG_CORE_WORKAROUND_SPECTRE_BP_SEC to cover
CVE-2022-23960 (aka Spectre-BHB) too since both have much in common.
Spectre-BHB is another speculation attack on branch prediction. Further
details can be found at [1].
The software workaround added for CPUs vulnerable to Spectre-V2 covers
Spectre-BHB too. New software workaround is only needed for CPUs immune to
Spectre-V2, but not so to Spectre-BHB.
The Spectre-V2 workaround is to invalidate the entire branch predictor
table. Most new CPU immune to Spectre-V2 but vulnerable to Spectre-BHB
can avoid invalidating the entire branch predictor table, instead is
this invalidation replaced by a loop designed to exhaust the branch
predictor in a way that the exploit isn't possible any longer.
Link: [1] https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability/spectre-bhb
Fixes: CVE-2022-23960
Acked-by: Etienne Carriere <etienne.carriere@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
|
| H A D | thread_a64.S | ce08459a1c8eac243e79c0104c554ee740434552 Thu Mar 24 19:59:55 UTC 2022 Jens Wiklander <jens.wiklander@linaro.org> core: arm: spectre-bhb software workaround
Expands the config option CFG_CORE_WORKAROUND_SPECTRE_BP_SEC to cover
CVE-2022-23960 (aka Spectre-BHB) too since both have much in common.
Spectre-BHB is another speculation attack on branch prediction. Further
details can be found at [1].
The software workaround added for CPUs vulnerable to Spectre-V2 covers
Spectre-BHB too. New software workaround is only needed for CPUs immune to
Spectre-V2, but not so to Spectre-BHB.
The Spectre-V2 workaround is to invalidate the entire branch predictor
table. Most new CPU immune to Spectre-V2 but vulnerable to Spectre-BHB
can avoid invalidating the entire branch predictor table, instead is
this invalidation replaced by a loop designed to exhaust the branch
predictor in a way that the exploit isn't possible any longer.
Link: [1] https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability/spectre-bhb
Fixes: CVE-2022-23960
Acked-by: Etienne Carriere <etienne.carriere@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
|
| H A D | thread.c | ce08459a1c8eac243e79c0104c554ee740434552 Thu Mar 24 19:59:55 UTC 2022 Jens Wiklander <jens.wiklander@linaro.org> core: arm: spectre-bhb software workaround
Expands the config option CFG_CORE_WORKAROUND_SPECTRE_BP_SEC to cover
CVE-2022-23960 (aka Spectre-BHB) too since both have much in common.
Spectre-BHB is another speculation attack on branch prediction. Further
details can be found at [1].
The software workaround added for CPUs vulnerable to Spectre-V2 covers
Spectre-BHB too. New software workaround is only needed for CPUs immune to
Spectre-V2, but not so to Spectre-BHB.
The Spectre-V2 workaround is to invalidate the entire branch predictor
table. Most new CPU immune to Spectre-V2 but vulnerable to Spectre-BHB
can avoid invalidating the entire branch predictor table, instead is
this invalidation replaced by a loop designed to exhaust the branch
predictor in a way that the exploit isn't possible any longer.
Link: [1] https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability/spectre-bhb
Fixes: CVE-2022-23960
Acked-by: Etienne Carriere <etienne.carriere@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
|
| /optee_os/core/arch/arm/ |
| H A D | arm.mk | ce08459a1c8eac243e79c0104c554ee740434552 Thu Mar 24 19:59:55 UTC 2022 Jens Wiklander <jens.wiklander@linaro.org> core: arm: spectre-bhb software workaround
Expands the config option CFG_CORE_WORKAROUND_SPECTRE_BP_SEC to cover
CVE-2022-23960 (aka Spectre-BHB) too since both have much in common.
Spectre-BHB is another speculation attack on branch prediction. Further
details can be found at [1].
The software workaround added for CPUs vulnerable to Spectre-V2 covers
Spectre-BHB too. New software workaround is only needed for CPUs immune to
Spectre-V2, but not so to Spectre-BHB.
The Spectre-V2 workaround is to invalidate the entire branch predictor
table. Most new CPU immune to Spectre-V2 but vulnerable to Spectre-BHB
can avoid invalidating the entire branch predictor table, instead is
this invalidation replaced by a loop designed to exhaust the branch
predictor in a way that the exploit isn't possible any longer.
Link: [1] https://developer.arm.com/support/arm-security-updates/speculative-processor-vulnerability/spectre-bhb
Fixes: CVE-2022-23960
Acked-by: Etienne Carriere <etienne.carriere@linaro.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
|