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| author |   Desnes A. Nunes do Rosario <desnesn@linux.vnet.ibm.com> | 2020-06-04 16:52:19 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-04 19:06:27 -0700 |
| commit | c63e5e7f9942ac18bc6cc7e8853ad709e72e9f8b (patch) | |
| tree | 9edba462a364de7c02322dde74937b1eead0e0fd /tools/testing | |
| parent | selftests/vm/pkeys: introduce powerpc support (diff) | |
| download | wireguard-linux-c63e5e7f9942ac18bc6cc7e8853ad709e72e9f8b.tar.xz wireguard-linux-c63e5e7f9942ac18bc6cc7e8853ad709e72e9f8b.zip | |
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.
Signed-off-by: "Desnes A. Nunes do Rosario" <desnesn@linux.vnet.ibm.com>
Signed-off-by: Ram Pai <linuxram@us.ibm.com>
Signed-off-by: Sandipan Das <sandipan@linux.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Dave Hansen <dave.hansen@intel.com>
Cc: Florian Weimer <fweimer@redhat.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thiago Jung Bauermann <bauerman@linux.ibm.com>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Michal Suchanek <msuchanek@suse.de>
Cc: Shuah Khan <shuah@kernel.org>
Link: http://lkml.kernel.org/r/0341a0ca961166814b44c9e724774672c18d54ca.1585646528.git.sandipan@linux.ibm.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'tools/testing')
| -rw-r--r-- | tools/testing/selftests/vm/pkey-powerpc.h | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/tools/testing/selftests/vm/pkey-powerpc.h b/tools/testing/selftests/vm/pkey-powerpc.h index 3fded948856d..7ad283d4524e 100644 --- a/tools/testing/selftests/vm/pkey-powerpc.h +++ b/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) @@ -66,12 +69,27 @@ 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) |