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fix(cpus): workaround for CVE-2024-5660 for Neoverse-V3

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Implements mitigation for CVE-2024-5660 that affects Neoverse-V3
revisions r0p0, r0p1.
The workaround is to disable the hardware page aggregation at
EL3 by setting CPUECTLR_EL1[46] = 1'b1.

Public Documentation:
https://developer.arm.com/Arm%20Security%20Center/Arm%20CPU%20Vulnerability%20CVE-2024-5660

Change-Id: I9ed2590bf1215bf6a692f01dfd351e469ff072f8
Signed-off-by: Sona Mathew <sonarebecca.mathew@arm.com>
This commit is contained in:
Sona Mathew 2024-05-21 13:51:31 -05:00
parent af65cbb954
commit ad3da01990
1 changed files with 7 additions and 0 deletions
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7
lib/cpus/aarch64/neoverse_v3.S
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@ -26,6 +26,13 @@
wa_cve_2022_23960_bhb_vector_table NEOVERSE_V3_BHB_LOOP_COUNT, neoverse_v3
#endif /* WORKAROUND_CVE_2022_23960 */
/* Disable hardware page aggregation. Enables mitigation for `CVE-2024-5660` */
workaround_reset_start neoverse_v3, CVE(2024, 5660), WORKAROUND_CVE_2024_5660
sysreg_bit_set NEOVERSE_V3_CPUECTLR_EL1, BIT(46)
workaround_reset_end neoverse_v3, CVE(2024, 5660)
check_erratum_ls neoverse_v3, CVE(2024, 5660), CPU_REV(0, 1)
workaround_reset_start neoverse_v3, CVE(2022,23960), WORKAROUND_CVE_2022_23960
#if IMAGE_BL31
/*