diff options
| author | Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com> | 2020-07-09 08:59:33 +0530 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2020-07-20 22:57:58 +1000 |
| commit | c529afd7cbc71ae1dc44a31efc7c1c9db3c3a143 (patch) | |
| tree | 08c2be27ab217d293233ba4236de26199d500893 /arch/powerpc/mm | |
| parent | a4678d4b477c3d2901f101986ca01406f3b7eaea (diff) | |
powerpc/book3s64/pkeys: Convert pkey_total to num_pkey
num_pkey now represents max number of keys supported such that we return
to userspace 0 - num_pkey - 1.
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20200709032946.881753-11-aneesh.kumar@linux.ibm.com
Diffstat (limited to 'arch/powerpc/mm')
| -rw-r--r-- | arch/powerpc/mm/book3s64/pkeys.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/arch/powerpc/mm/book3s64/pkeys.c b/arch/powerpc/mm/book3s64/pkeys.c index 8bdb56ce8b43..65926c00c8a6 100644 --- a/arch/powerpc/mm/book3s64/pkeys.c +++ b/arch/powerpc/mm/book3s64/pkeys.c @@ -13,7 +13,7 @@ #include <linux/of_device.h> DEFINE_STATIC_KEY_FALSE(pkey_disabled); -int pkeys_total; /* Total pkeys as per device tree */ +int num_pkey; /* Max number of pkeys supported */ u32 initial_allocation_mask; /* Bits set for the initially allocated keys */ /* * Keys marked in the reservation list cannot be allocated by userspace @@ -93,7 +93,7 @@ static int scan_pkey_feature(void) static int pkey_initialize(void) { - int os_reserved, i; + int pkeys_total, i; /* * We define PKEY_DISABLE_EXECUTE in addition to the arch-neutral @@ -133,12 +133,12 @@ static int pkey_initialize(void) * The OS can manage only 8 pkeys due to its inability to represent them * in the Linux 4K PTE. Mark all other keys reserved. */ - os_reserved = pkeys_total - 8; + num_pkey = min(8, pkeys_total); #else - os_reserved = 0; + num_pkey = pkeys_total; #endif - if (unlikely((pkeys_total - os_reserved) <= execute_only_key)) { + if (unlikely(num_pkey <= execute_only_key)) { /* * Insufficient number of keys to support * execute only key. Mark it unavailable. @@ -185,10 +185,10 @@ static int pkey_initialize(void) default_uamor &= ~(0x3ul << pkeyshift(1)); /* - * Prevent the usage of OS reserved the keys. Update UAMOR + * Prevent the usage of OS reserved keys. Update UAMOR * for those keys. */ - for (i = (pkeys_total - os_reserved); i < pkeys_total; i++) { + for (i = num_pkey; i < pkeys_total; i++) { reserved_allocation_mask |= (0x1 << i); default_uamor &= ~(0x3ul << pkeyshift(i)); } |