Handle TLB shootdown IPI during the EFI runtime calls, on SandyBridge
and IvyBridge machines, which support PCID but do not have INVPCID instruction. MFC after: 1 week
This commit is contained in:
parent
20692187ea
commit
9fc97c9010
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=306351
@ -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)
|
||||
|
Loading…
Reference in New Issue
Block a user