ac70750c65
The forthcoming microcode update will fix a TSX bug by clobbering PMC3 when TSX instructions are executed (even speculatively). There is an alternate mode where CPU executes all TSX instructions by aborting them, in which case PMC3 is still available to OS. Any code that correctly uses TSX must be ready to handle abort anyway. Since it is believed that FreeBSD population of hwpmc(4) users is significantly larger than the population of TSX users, switch the microcode into TSX abort mode whenever a pmc is allocated, and back to bug avoidance mode when the last pmc is deallocated. Sponsored by: The FreeBSD Foundation MFC after: 1 week |
||
|---|---|---|
| .. | ||
| hwpmc_amd.c | ||
| hwpmc_amd.h | ||
| hwpmc_arm64_md.c | ||
| hwpmc_arm64.c | ||
| hwpmc_arm64.h | ||
| hwpmc_arm.c | ||
| hwpmc_armv7.c | ||
| hwpmc_armv7.h | ||
| hwpmc_core.c | ||
| hwpmc_core.h | ||
| hwpmc_e500.c | ||
| hwpmc_intel.c | ||
| hwpmc_logging.c | ||
| hwpmc_mips24k.c | ||
| hwpmc_mips74k.c | ||
| hwpmc_mips.c | ||
| hwpmc_mod.c | ||
| hwpmc_mpc7xxx.c | ||
| hwpmc_octeon.c | ||
| hwpmc_powerpc.c | ||
| hwpmc_powerpc.h | ||
| hwpmc_ppc970.c | ||
| hwpmc_riscv.h | ||
| hwpmc_soft.c | ||
| hwpmc_soft.h | ||
| hwpmc_sparc64.c | ||
| hwpmc_tsc.c | ||
| hwpmc_tsc.h | ||
| hwpmc_uncore.c | ||
| hwpmc_uncore.h | ||
| hwpmc_x86.c | ||
| hwpmc_xscale.h | ||
| pmc_events.h | ||