svn commit: r355474 - head/sys/amd64/amd64

[Konstantin Belousov]

Author: kib
Date: Sat Dec  7 00:23:19 2019
New Revision: 355474
URL: https://svnweb.freebsd.org/changeset/base/355474

Log:
  amd64: properly set the start of the io permission bitmap for BSP
  
  ... after the initial common TSS is copied into its final location
  during PCPU reallocation.
  
  Reported by:	pho
  Sponsored by:	The FreeBSD Foundation
  MFC after:	1 week

Modified:
  head/sys/amd64/amd64/pmap.c

Modified: head/sys/amd64/amd64/pmap.c
==============================================================================
--- head/sys/amd64/amd64/pmap.c	Fri Dec  6 23:59:23 2019	(r355473)
+++ head/sys/amd64/amd64/pmap.c	Sat Dec  7 00:23:19 2019	(r355474)
@@ -1771,6 +1771,8 @@ pmap_bootstrap(vm_paddr_t *firstaddr)
 	pcpu_init(&__pcpu[0], 0, sizeof(struct pcpu));
 	amd64_bsp_pcpu_init1(&__pcpu[0]);
 	amd64_bsp_ist_init(&__pcpu[0]);
+	__pcpu[0].pc_common_tss.tss_iobase = sizeof(struct amd64tss) +
+	    IOPERM_BITMAP_SIZE;
 	memcpy(__pcpu[0].pc_gdt, temp_bsp_pcpu.pc_gdt, NGDT *
 	    sizeof(struct user_segment_descriptor));
 	gdt_segs[GPROC0_SEL].ssd_base = (uintptr_t)&__pcpu[0].pc_common_tss;