FEX-Emu/linux
1
0
Fork 0
mirror of https://github.com/FEX-Emu/linux.git synced 2024-12-27 11:55:53 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

powerpc/rfi-flush: Always enable fallback flush on pseries

Browse Source 
This ensures the fallback flush area is always allocated on pseries,
so in case a LPAR is migrated from a patched to an unpatched system,
it is possible to enable the fallback flush in the target system.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Mauricio Faria de Oliveira <mauricfo@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Michael Ellerman 2018-03-14 19:40:40 -03:00
parent abf110f3e1
commit 84749a58b6
1 changed files with 1 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
arch/powerpc/platforms/pseries/setup.c
View File

@ -468,26 +468,18 @@ static void pseries_setup_rfi_flush(void)
/* Enable by default */
enable = true;
types = L1D_FLUSH_FALLBACK;
rc = plpar_get_cpu_characteristics(&result);
if (rc == H_SUCCESS) {
types = L1D_FLUSH_NONE;
if (result.character & H_CPU_CHAR_L1D_FLUSH_TRIG2)
types |= L1D_FLUSH_MTTRIG;
if (result.character & H_CPU_CHAR_L1D_FLUSH_ORI30)
types |= L1D_FLUSH_ORI;
/* Use fallback if nothing set in hcall */
if (types == L1D_FLUSH_NONE)
types = L1D_FLUSH_FALLBACK;
if ((!(result.behaviour & H_CPU_BEHAV_L1D_FLUSH_PR)) ||
(!(result.behaviour & H_CPU_BEHAV_FAVOUR_SECURITY)))
enable = false;
} else {
/* Default to fallback if case hcall is not available */
types = L1D_FLUSH_FALLBACK;
}
setup_rfi_flush(types, enable);