Date: Wed, 15 Aug 2018 01:17:55 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: current@freebsd.org Subject: EFIRT on machines with pcid after r337773 Message-ID: <20180814221755.GV2340@kib.kiev.ua>
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If you use UEFI boot, have EFIRT compiled in kernel (the case of GENERIC) or pre-loaded as module, and efirt is not disabled by a tunable, and the machine resets during kernel initialization, try this. diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c index d5d795ab502..c9334eab916 100644 --- a/sys/amd64/amd64/pmap.c +++ b/sys/amd64/amd64/pmap.c @@ -1188,7 +1188,7 @@ pmap_bootstrap(vm_paddr_t *firstaddr) kernel_pmap->pm_pcids[i].pm_pcid = PMAP_PCID_KERN; kernel_pmap->pm_pcids[i].pm_gen = 1; } - PCPU_SET(pcid_next, PMAP_PCID_KERN + 1); + PCPU_SET(pcid_next, PMAP_PCID_KERN + 2); PCPU_SET(pcid_gen, 1); /* * pcpu area for APs is zeroed during AP startup. @@ -2651,8 +2651,8 @@ pmap_pinit0(pmap_t pmap) bzero(&pmap->pm_stats, sizeof pmap->pm_stats); pmap->pm_flags = pmap_flags; CPU_FOREACH(i) { - pmap->pm_pcids[i].pm_pcid = PMAP_PCID_NONE; - pmap->pm_pcids[i].pm_gen = 0; + pmap->pm_pcids[i].pm_pcid = PMAP_PCID_KERN + 1; + pmap->pm_pcids[i].pm_gen = 1; if (!pti) { __pcpu[i].pc_kcr3 = PMAP_NO_CR3; __pcpu[i].pc_ucr3 = PMAP_NO_CR3;
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