Minki/linux
1
0
Fork 1
mirror of https://github.com/torvalds/linux.git synced 2024-12-28 05:41:55 +00:00
Code Issues Packages Projects Releases Wiki Activity

- Flush the translation service tables to prevent unpredictable behavior

Browse Source 
on non-coherent GIC devices
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEzv7L6UO9uDPlPSfHEsHwGGHeVUoFAmVaFXoACgkQEsHwGGHe
 VUrEwQ//Q+KombMw6g2SkKqQkhIP+xCT661NFuaDNSvf2lZU6vLde4CUfGzJiZXq
 YR+vksBl40i0F/w5yOQUW6hIGDoUHjsICOzW29E/5e7aVQzSgW0RKkdI3d3Hwa8i
 UwIl2cFJGdHy1on8p8RknuBGr73j2VojozovU1sHA84R2QTdVRge42t+jQJdmYwl
 HuVTz5hwbdpYoPwke2uRAqaO7Ko6tzgB0YKS/TIisfELyn3hdgXoQLV+q+ve2j+K
 cxUAQ4r8ztCFvex2GybJeoDoLzkUOS0bZP0PSu72a91HZH2JRAfPPlX7kWSv4ykU
 d0YSV7Rfj+ZeT+LTyilHSj/Ds1TGC8mqSn1oiO/U4Wf+06vt9sWhGlWcHejUTKrr
 gY/ZDsNUQ2pnMVfSIKuKfsSgzWzyTb+mQogk/EvGWjQwDb0BW137OQ/d++D+pt0W
 2zXCdTgjAGm1+sbYJUrtH70QFhoKo3PIqxF4pKFvQvbaEObstwmwWfCmvdvwIWr5
 hozVBoURu/JSVkR5uPG+XRRKTeeinhS05QlO8zie4aUi8pzFPIb/tUF3WEm6GQaL
 n/FNrDOId7LNlbUfqRQ3XzsqFUReCG1ubw38c7xBpmmeIiN8JXI0FZiwWDfhm/F0
 ktjRcUv6CwBAclS67DlKczq5AzkEK6vNjQ1Fgir9RxZ3dRASrds=
 =8Fkv
 -----END PGP SIGNATURE-----

Merge tag 'irq_urgent_for_v6.7_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull irq fix from Borislav Petkov:

 - Flush the translation service tables to prevent unpredictable
   behavior on non-coherent GIC devices

* tag 'irq_urgent_for_v6.7_rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  irqchip/gic-v3-its: Flush ITS tables correctly in non-coherent GIC designs
This commit is contained in:
Linus Torvalds 2023-11-19 13:49:32 -08:00
commit 46a29dd146
1 changed files with 10 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
drivers/irqchip/irq-gic-v3-its.c
View File

@ -2379,12 +2379,12 @@ retry_baser:
break;
}
if (!shr)
gic_flush_dcache_to_poc(base, PAGE_ORDER_TO_SIZE(order));
its_write_baser(its, baser, val);
tmp = baser->val;
if (its->flags & ITS_FLAGS_FORCE_NON_SHAREABLE)
tmp &= ~GITS_BASER_SHAREABILITY_MASK;
if ((val ^ tmp) & GITS_BASER_SHAREABILITY_MASK) {
/*
* Shareability didn't stick. Just use
@ -2394,10 +2394,9 @@ retry_baser:
* non-cacheable as well.
*/
shr = tmp & GITS_BASER_SHAREABILITY_MASK;
if (!shr) {
if (!shr)
cache = GITS_BASER_nC;
gic_flush_dcache_to_poc(base, PAGE_ORDER_TO_SIZE(order));
}
goto retry_baser;
}
@ -2609,6 +2608,11 @@ static int its_alloc_tables(struct its_node *its)
/* erratum 24313: ignore memory access type */
cache = GITS_BASER_nCnB;
if (its->flags & ITS_FLAGS_FORCE_NON_SHAREABLE) {
cache = GITS_BASER_nC;
shr = 0;
}
for (i = 0; i < GITS_BASER_NR_REGS; i++) {
struct its_baser *baser = its->tables + i;
u64 val = its_read_baser(its, baser);