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adfe7512e1
Today, PAT is usable only with MTRR being active, with some nasty tweaks to make PAT usable when running as a Xen PV guest which doesn't support MTRR. The reason for this coupling is that both PAT MSR changes and MTRR changes require a similar sequence and so full PAT support was added using the already available MTRR handling. Xen PV PAT handling can work without MTRR, as it just needs to consume the PAT MSR setting done by the hypervisor without the ability and need to change it. This in turn has resulted in a convoluted initialization sequence and wrong decisions regarding cache mode availability due to misguiding PAT availability flags. Fix all of that by allowing to use PAT without MTRR and by reworking the current PAT initialization sequence to match better with the newly introduced generic cache initialization. This removes the need of the recently added pat_force_disabled flag, so remove the remnants of the patch adding it. Signed-off-by: Juergen Gross <jgross@suse.com> Signed-off-by: Borislav Petkov <bp@suse.de> Link: https://lore.kernel.org/r/20221102074713.21493-14-jgross@suse.com Signed-off-by: Borislav Petkov <bp@suse.de> |
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| .. | ||
| mce | ||
| microcode | ||
| mtrr | ||
| resctrl | ||
| sgx | ||
| .gitignore | ||
| acrn.c | ||
| amd.c | ||
| aperfmperf.c | ||
| bugs.c | ||
| cacheinfo.c | ||
| centaur.c | ||
| common.c | ||
| cpu.h | ||
| cpuid-deps.c | ||
| cyrix.c | ||
| feat_ctl.c | ||
| hygon.c | ||
| hypervisor.c | ||
| intel_epb.c | ||
| intel_pconfig.c | ||
| intel.c | ||
| Makefile | ||
| match.c | ||
| mkcapflags.sh | ||
| mshyperv.c | ||
| perfctr-watchdog.c | ||
| powerflags.c | ||
| proc.c | ||
| rdrand.c | ||
| scattered.c | ||
| topology.c | ||
| transmeta.c | ||
| tsx.c | ||
| umc.c | ||
| umwait.c | ||
| vmware.c | ||
| vortex.c | ||
| zhaoxin.c | ||