Mike Gerow bb9603b19f Revert "x86: cpuid: clear FSRM bit" ... This reverts commit fa1e6e3249. Reason for revert: This turns out to have been a bug in the kernel that can be addressed with the following patch: ``` diff --git a/arch/x86/kernel/cpu/intel.c b/arch/x86/kernel/cpu/intel.c index 2d7ea5480ec3..71b412f820c7 100644 --- a/arch/x86/kernel/cpu/intel.c +++ b/arch/x86/kernel/cpu/intel.c @@ -328,6 +328,7 @@ static void early_init_intel(struct cpuinfo_x86 *c) pr_info("Disabled fast string operations\n"); setup_clear_cpu_cap(X86_FEATURE_REP_GOOD); setup_clear_cpu_cap(X86_FEATURE_ERMS); + setup_clear_cpu_cap(X86_FEATURE_FSRM); } } ``` Original change's description: > x86: cpuid: clear FSRM bit > > This seems to cause an unexpected fault under Bruschetta, and possibly > any other software using Ice Lake's Fast Short REP MOVs. > > This is a port of a patch from AOSP[1]. > > [1]: https://android-review.googlesource.com/c/platform/external/crosvm/+/2138413 > > BUG=b:228795137 > TEST=deployed to brya board, bruschetta bootup no longer hangs after > entering smpboot > > Change-Id: Ifb4e8af104ee8e2945598ea4c06001cbd98c40e9 > Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/3913990 > Auto-Submit: Mike Gerow <gerow@google.com> > Reviewed-by: Daniel Verkamp <dverkamp@chromium.org> > Commit-Queue: Daniel Verkamp <dverkamp@chromium.org> Bug: b:228795137 Change-Id: I7bd8be1b33315dddb5b73df62303bd967ac0573e No-Presubmit: true No-Tree-Checks: true No-Try: true Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/3916337 Reviewed-by: Daniel Verkamp <dverkamp@chromium.org> Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com> Commit-Queue: Daniel Verkamp <dverkamp@chromium.org> Auto-Submit: Mike Gerow <gerow@google.com>		2022-09-27 19:14:59 +00:00
..
src	Revert "x86: cpuid: clear FSRM bit"	2022-09-27 19:14:59 +00:00
Cargo.toml	gdb: Upgrade gdbstub & gdbstub_arch dependencies	2022-09-01 16:24:00 +00:00