d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Handle TLB shootdown IPI during the EFI runtime calls, on SandyBridge

Browse Source 
and IvyBridge machines, which support PCID but do not have INVPCID
instruction.

MFC after:	1 week
This commit is contained in:
Konstantin Belousov 2016-09-26 17:25:25 +00:00
parent 20692187ea
commit 9fc97c9010
1 changed files with 15 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
sys/amd64/amd64/efirt.c
View File

@ -53,6 +53,7 @@ __FBSDID("$FreeBSD$");
#include <machine/vmparam.h>
#include <vm/vm.h>
#include <vm/pmap.h>
#include <vm/vm_map.h>
#include <vm/vm_object.h>
#include <vm/vm_page.h>
#include <vm/vm_pager.h>
@ -301,6 +302,17 @@ efi_enter(void)
PMAP_UNLOCK(curpmap);
return (error);
}
/*
* IPI TLB shootdown handler invltlb_pcid_handler() reloads
* %cr3 from the curpmap->pm_cr3, which would disable runtime
* segments mappings. Block the handler's action by setting
* curpmap to impossible value. See also comment in
* pmap.c:pmap_activate_sw().
*/
if (pmap_pcid_enabled && !invpcid_works)
PCPU_SET(curpmap, NULL);
load_cr3(VM_PAGE_TO_PHYS(efi_pml4_page) | (pmap_pcid_enabled ?
curpmap->pm_pcids[PCPU_GET(cpuid)].pm_pcid : 0));
/*
@ -317,7 +329,9 @@ efi_leave(void)
{
pmap_t curpmap;
curpmap = PCPU_GET(curpmap);
curpmap = &curproc->p_vmspace->vm_pmap;
if (pmap_pcid_enabled && !invpcid_works)
PCPU_SET(curpmap, curpmap);
load_cr3(curpmap->pm_cr3 | (pmap_pcid_enabled ?
curpmap->pm_pcids[PCPU_GET(cpuid)].pm_pcid : 0));
if (!pmap_pcid_enabled)