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From: Sandipan Das <sandipan@linux.ibm.com>
To: shuah@kernel.org, linux-kselftest@vger.kernel.org
Cc: linux-arch@vger.kernel.org, fweimer@redhat.com,
	dave.hansen@intel.com, x86@kernel.org, linuxram@us.ibm.com,
	mhocko@kernel.org, linux-mm@kvack.org, mingo@redhat.com,
	aneesh.kumar@linux.ibm.com, bauerman@linux.ibm.com,
	msuchanek@suse.de, mpe@ellerman.id.au,
	linuxppc-dev@lists.ozlabs.org,
	"Desnes A. Nunes do Rosario" <desnesn@linux.vnet.ibm.com>
Subject: [PATCH v17 15/24] selftests/vm/pkeys: Fix number of reserved powerpc pkeys
Date: Mon, 20 Jan 2020 14:06:12 +0530
Message-ID: <7ec3f35788b60da183697f1462ee11dd9d62eef1.1579507768.git.sandipan@linux.ibm.com> (raw)
In-Reply-To: <cover.1579507768.git.sandipan@linux.ibm.com>
In-Reply-To: <cover.1579507768.git.sandipan@linux.ibm.com>

From: "Desnes A. Nunes do Rosario" <desnesn@linux.vnet.ibm.com>

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>
---
 tools/testing/selftests/vm/pkey-powerpc.h | 22 ++++++++++++++++++++--
 1 file changed, 20 insertions(+), 2 deletions(-)

diff --git a/tools/testing/selftests/vm/pkey-powerpc.h b/tools/testing/selftests/vm/pkey-powerpc.h
index c79f4160a6a0..319673bbab0b 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)
@@ -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)
-- 
2.17.1


  parent reply index

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-01-20  8:35 [PATCH v16 00/23] selftests, powerpc, x86: Memory Protection Keys Sandipan Das
2020-01-20  8:35 ` [PATCH v17 01/24] selftests/x86/pkeys: Move selftests to arch-neutral directory Sandipan Das
2020-01-20  8:35   ` Sandipan Das
2020-01-20  8:35 ` [PATCH v17 02/24] selftests: vm: pkeys: Fix multilib builds for x86 Sandipan Das
2020-01-20  8:35   ` Sandipan Das
2020-01-20  8:35 ` [PATCH v17 00/23] selftests, powerpc, x86: Memory Protection Keys Sandipan Das
2020-01-20  8:36 ` [PATCH v17 03/24] selftests/vm/pkeys: Rename all references to pkru to a generic name Sandipan Das
2020-01-20  8:36 ` [PATCH v17 04/24] selftests/vm/pkeys: Move generic definitions to header file Sandipan Das
2020-01-20  8:36 ` [PATCH v17 05/24] selftests/vm/pkeys: Move some definitions to arch-specific header Sandipan Das
2020-01-20  8:36 ` [PATCH v17 06/24] selftests/vm/pkeys: Make gcc check arguments of sigsafe_printf() Sandipan Das
2020-01-20  8:36 ` [PATCH v17 07/24] selftests: vm: pkeys: Use sane types for pkey register Sandipan Das
2020-01-20  8:36 ` [PATCH v17 08/24] selftests: vm: pkeys: Add helpers for pkey bits Sandipan Das
2020-01-20  8:36 ` [PATCH v17 09/24] selftests/vm/pkeys: Fix pkey_disable_clear() Sandipan Das
2020-01-20  8:36 ` [PATCH v17 10/24] selftests/vm/pkeys: Fix assertion in pkey_disable_set/clear() Sandipan Das
2020-01-20  8:36 ` [PATCH v17 11/24] selftests/vm/pkeys: Fix alloc_random_pkey() to make it really random Sandipan Das
2020-01-20  8:36 ` [PATCH v17 12/24] selftests: vm: pkeys: Use the correct huge page size Sandipan Das
2020-01-20  8:36 ` [PATCH v17 13/24] selftests/vm/pkeys: Introduce generic pkey abstractions Sandipan Das
2020-01-20  8:36 ` [PATCH v17 14/24] selftests/vm/pkeys: Introduce powerpc support Sandipan Das
2020-01-20  8:36 ` Sandipan Das [this message]
2020-01-20  8:36 ` [PATCH v17 16/24] selftests/vm/pkeys: Fix assertion in test_pkey_alloc_exhaust() Sandipan Das
2020-01-20  8:36 ` [PATCH v17 17/24] selftests/vm/pkeys: Improve checks to determine pkey support Sandipan Das
2020-01-20  8:36 ` [PATCH v17 18/24] selftests/vm/pkeys: Associate key on a mapped page and detect access violation Sandipan Das
2020-01-20  8:36 ` [PATCH v17 19/24] selftests/vm/pkeys: Associate key on a mapped page and detect write violation Sandipan Das
2020-01-20  8:36 ` [PATCH v17 20/24] selftests/vm/pkeys: Detect write violation on a mapped access-denied-key page Sandipan Das
2020-01-20  8:36 ` [PATCH v17 21/24] selftests/vm/pkeys: Introduce a sub-page allocator Sandipan Das
2020-01-20  8:36 ` [PATCH v17 22/24] selftests/vm/pkeys: Test correct behaviour of pkey-0 Sandipan Das
2020-01-20  8:36 ` [PATCH v17 23/24] selftests/vm/pkeys: Override access right definitions on powerpc Sandipan Das
2020-01-20  8:36 ` [PATCH v17 24/24] selftests: vm: pkeys: Use the correct page size " Sandipan Das
2020-01-22 18:45 ` [PATCH v16 00/23] selftests, powerpc, x86: Memory Protection Keys Dave Hansen
2020-01-27 10:11   ` Sandipan Das
2020-01-27 15:42     ` Dave Hansen
2020-01-28  9:38       ` Sandipan Das
2020-01-29  9:56         ` Sandipan Das
2020-01-29 18:59         ` Dave Hansen
2020-01-30  6:19           ` Sandipan Das
2020-01-30  9:20             ` Sandipan Das
2020-01-29 19:04   ` Florian Weimer

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