The patch titled
Subject: selftests/vm/pkeys: fix number of reserved powerpc pkeys
has been added to the -mm tree. Its filename is
selftests-vm-pkeys-fix-number-of-reserved-powerpc-pkeys.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/selftests-vm-pkeys-fix-number-of-reserved-powerpc-pkeys.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/selftests-vm-pkeys-fix-number-of-reserved-powerpc-pkeys.patch
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From: "Desnes A. Nunes do Rosario" <desnesn@xxxxxxxxxxxxxxxxxx>
Subject: selftests/vm/pkeys: fix number of reserved powerpc pkeys
The number of reserved pkeys in a PowerNV environment is different from
that on PowerVM or KVM.
Tested on PowerVM and PowerNV environments.
Link: http://lkml.kernel.org/r/0341a0ca961166814b44c9e724774672c18d54ca.1585646528.git.sandipan@xxxxxxxxxxxxx
Signed-off-by: "Desnes A. Nunes do Rosario" <desnesn@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Ram Pai <linuxram@xxxxxxxxxx>
Signed-off-by: Sandipan Das <sandipan@xxxxxxxxxxxxx>
Acked-by: Dave Hansen <dave.hansen@xxxxxxxxx>
Cc: Florian Weimer <fweimer@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Thiago Jung Bauermann <bauerman@xxxxxxxxxxxxx>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxx>
Cc: Michael Ellerman <mpe@xxxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: Michal Suchanek <msuchanek@xxxxxxx>
Cc: Shuah Khan <shuah@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
tools/testing/selftests/vm/pkey-powerpc.h | 22 ++++++++++++++++++--
1 file changed, 20 insertions(+), 2 deletions(-)
--- a/tools/testing/selftests/vm/pkey-powerpc.h~selftests-vm-pkeys-fix-number-of-reserved-powerpc-pkeys
+++ a/tools/testing/selftests/vm/pkey-powerpc.h
@@ -28,7 +28,10 @@
#define NR_RESERVED_PKEYS_4K 27 /* pkey-0, pkey-1, exec-only-pkey
and 24 other keys that cannot be
represented in the PTE */
-#define NR_RESERVED_PKEYS_64K 3 /* pkey-0, pkey-1 and exec-only-pkey */
+#define NR_RESERVED_PKEYS_64K_3KEYS 3 /* PowerNV and KVM: pkey-0,
+ pkey-1 and exec-only key */
+#define NR_RESERVED_PKEYS_64K_4KEYS 4 /* PowerVM: pkey-0, pkey-1,
+ pkey-31 and exec-only key */
#define PKEY_BITS_PER_PKEY 2
#define HPAGE_SIZE (1UL << 24)
#define PAGE_SIZE (1UL << 16)
@@ -65,12 +68,27 @@ static inline int cpu_has_pku(void)
return 1;
}
+static inline bool arch_is_powervm()
+{
+ struct stat buf;
+
+ if ((stat("/sys/firmware/devicetree/base/ibm,partition-name", &buf) == 0) &&
+ (stat("/sys/firmware/devicetree/base/hmc-managed?", &buf) == 0) &&
+ (stat("/sys/firmware/devicetree/base/chosen/qemu,graphic-width", &buf) == -1) )
+ return true;
+
+ return false;
+}
+
static inline int get_arch_reserved_keys(void)
{
if (sysconf(_SC_PAGESIZE) == 4096)
return NR_RESERVED_PKEYS_4K;
else
- return NR_RESERVED_PKEYS_64K;
+ if (arch_is_powervm())
+ return NR_RESERVED_PKEYS_64K_4KEYS;
+ else
+ return NR_RESERVED_PKEYS_64K_3KEYS;
}
void expect_fault_on_read_execonly_key(void *p1, int pkey)
_
Patches currently in -mm which might be from desnesn@xxxxxxxxxxxxxxxxxx are
selftests-vm-pkeys-fix-number-of-reserved-powerpc-pkeys.patch
