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tune-corei7.inc: tell qemu to emulate a matching processor 

If tune-corei7 is in use then the target binaries may contain instructions that
qemu-x86-64 can't execute by default, resulting in errors on rootfs construction:

NOTE: Running intercept scripts:
NOTE: > Executing update_font_cache intercept ...
qemu: uncaught target signal 4 (Illegal instruction) - core dumped

In this case the instruction is popcnt, part of SSE4.2, so tell Qemu to emulate
the CPU that the tune targets (in this case, Nehalem). Also pass check=false as
the Nehalem machine supports VME but user-space qemu doesn't, which produces a
warning unless CPUID checking is disabled.

[ YOCTO #8888 ]

(From OE-Core rev: fef106b9b97ec48bad2b9a084357b884f653d6c8)

Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Ross Burton 2016-02-08 15:00:24 +00:00 committed by Richard Purdie
parent 5b70ee405a
commit 5b2b343453
1 changed files with 4 additions and 0 deletions
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4
meta/conf/machine/include/tune-corei7.inc
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@ -11,6 +11,7 @@ DEFAULTTUNE ?= "corei7-64"
# Pull in the previous tune in to pull in PACKAGE_EXTRA_ARCHS
require conf/machine/include/tune-core2.inc
# Extra tune features
TUNEVALID[corei7] = "Enable corei7 specific processor optimizations"
TUNE_CCARGS .= "${@bb.utils.contains('TUNE_FEATURES', 'corei7', ' -march=corei7 -mtune=corei7 -mfpmath=sse -msse4.2', '', d)}"
@ -21,15 +22,18 @@ TUNE_FEATURES_tune-corei7-32 = "${TUNE_FEATURES_tune-x86} corei7"
BASE_LIB_tune-corei7-32 = "lib"
TUNE_PKGARCH_tune-corei7-32 = "corei7-32"
PACKAGE_EXTRA_ARCHS_tune-corei7-32 = "${PACKAGE_EXTRA_ARCHS_tune-core2} corei7-32"
QEMU_EXTRAOPTIONS_corei7-32 = " -cpu Nehalem,check=false"
AVAILTUNES += "corei7-64"
TUNE_FEATURES_tune-corei7-64 = "${TUNE_FEATURES_tune-x86-64} corei7"
BASE_LIB_tune-corei7-64 = "lib64"
TUNE_PKGARCH_tune-corei7-64 = "corei7-64"
PACKAGE_EXTRA_ARCHS_tune-corei7-64 = "${PACKAGE_EXTRA_ARCHS_tune-core2-64} corei7-64"
QEMU_EXTRAOPTIONS_corei7-64 = " -cpu Nehalem,check=false"
AVAILTUNES += "corei7-64-x32"
TUNE_FEATURES_tune-corei7-64-x32 = "${TUNE_FEATURES_tune-x86-64-x32} corei7"
BASE_LIB_tune-corei7-64-x32 = "libx32"
TUNE_PKGARCH_tune-corei7-64-x32 = "corei7-64-x32"
PACKAGE_EXTRA_ARCHS_tune-corei7-64-x32 = "${PACKAGE_EXTRA_ARCHS_tune-core2-64-x32} corei7-64-x32"
QEMU_EXTRAOPTIONS_corei7-64-x32 = " -cpu Nehalem,check=false"