Date: Mon, 7 Sep 2015 10:13:15 +0000 (UTC) From: Andrew Turner <andrew@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r287532 - head/sys/arm64/arm64 Message-ID: <201509071013.t87ADFoT073115@repo.freebsd.org>
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Author: andrew Date: Mon Sep 7 10:13:14 2015 New Revision: 287532 URL: https://svnweb.freebsd.org/changeset/base/287532 Log: When dropping to EL1 ensure we have written to all special registers by moving the instruction barrier to just before we drop exception level. Sponsored by: ABT Systems Ltd Modified: head/sys/arm64/arm64/locore.S Modified: head/sys/arm64/arm64/locore.S ============================================================================== --- head/sys/arm64/arm64/locore.S Mon Sep 7 07:22:35 2015 (r287531) +++ head/sys/arm64/arm64/locore.S Mon Sep 7 10:13:14 2015 (r287532) @@ -246,11 +246,11 @@ drop_to_el1: mrs x2, icc_sre_el2 orr x2, x2, #ICC_SRE_EL2_EN /* Enable access from insecure EL1 */ msr icc_sre_el2, x2 - isb 2: /* Set the address to return to our return address */ msr elr_el2, x30 + isb eret
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