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(parent: 45f59ed) | patch
x86/spec-ctrl: Mitigate TAA after S3 resume
authorAndrew Cooper <andrew.cooper3@citrix.com>
Thu, 20 May 2021 00:21:39 +0000 (01:21 +0100)
committerAndrew Cooper <andrew.cooper3@citrix.com>
Tue, 8 Jun 2021 16:43:06 +0000 (17:43 +0100)
commit8cf276cb2e0b99b96333865873f56b0b31555ff1
tree6b20bbb9777b919f6b8149a67fb8ef5783916ad6tree | snapshot
parent45f59ed8865318bb0356954bad067f329677ce9ecommit | diff
x86/spec-ctrl: Mitigate TAA after S3 resume

The user chosen setting for MSR_TSX_CTRL needs restoring after S3.

All APs get the correct setting via start_secondary(), but the BSP was missed
out.

This is XSA-377 / CVE-2021-28690.

Fixes: 8c4330818f6 ("x86/spec-ctrl: Mitigate the TSX Asynchronous Abort sidechannel")
Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
xen/arch/x86/acpi/power.c diff | blob | history
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