From: Jordan Niethe <jniethe5@gmail.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: alistair@popple.id.au, npiggin@gmail.com, bala24@linux.ibm.com,
Jordan Niethe <jniethe5@gmail.com>,
dja@axtens.net
Subject: [PATCH v6 25/28] powerpc: Test prefixed instructions in feature fixups
Date: Tue, 28 Apr 2020 11:58:11 +1000 [thread overview]
Message-ID: <20200428015814.15380-26-jniethe5@gmail.com> (raw)
In-Reply-To: <20200428015814.15380-1-jniethe5@gmail.com>
Expand the feature-fixups self-tests to includes tests for prefixed
instructions.
Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
---
v6: New to series
---
arch/powerpc/lib/feature-fixups-test.S | 68 +++++++++++++++++++++++
arch/powerpc/lib/feature-fixups.c | 74 ++++++++++++++++++++++++++
2 files changed, 142 insertions(+)
diff --git a/arch/powerpc/lib/feature-fixups-test.S b/arch/powerpc/lib/feature-fixups-test.S
index b12168c2447a..6e2da9123a9b 100644
--- a/arch/powerpc/lib/feature-fixups-test.S
+++ b/arch/powerpc/lib/feature-fixups-test.S
@@ -791,3 +791,71 @@ globl(lwsync_fixup_test_expected_SYNC)
1: or 1,1,1
sync
+globl(ftr_fixup_prefix1)
+ or 1,1,1
+ .long 1 << 26
+ .long 0x0000000
+ or 2,2,2
+globl(end_ftr_fixup_prefix1)
+
+globl(ftr_fixup_prefix1_orig)
+ or 1,1,1
+ .long 1 << 26
+ .long 0x0000000
+ or 2,2,2
+
+globl(ftr_fixup_prefix1_expected)
+ or 1,1,1
+ nop
+ nop
+ or 2,2,2
+
+globl(ftr_fixup_prefix2)
+ or 1,1,1
+ .long 1 << 26
+ .long 0x0000000
+ or 2,2,2
+globl(end_ftr_fixup_prefix2)
+
+globl(ftr_fixup_prefix2_orig)
+ or 1,1,1
+ .long 1 << 26
+ .long 0x0000000
+ or 2,2,2
+
+globl(ftr_fixup_prefix2_alt)
+ .long 0x7000000
+ .long 0x0000001
+
+globl(ftr_fixup_prefix2_expected)
+ or 1,1,1
+ .long 1 << 26
+ .long 0x0000001
+ or 2,2,2
+
+globl(ftr_fixup_prefix3)
+ or 1,1,1
+ .long 1 << 26
+ .long 0x0000000
+ or 2,2,2
+ or 3,3,3
+globl(end_ftr_fixup_prefix3)
+
+globl(ftr_fixup_prefix3_orig)
+ or 1,1,1
+ .long 1 << 26
+ .long 0x0000000
+ or 2,2,2
+ or 3,3,3
+
+globl(ftr_fixup_prefix3_alt)
+ .long 1 << 26
+ .long 0x0000001
+ nop
+
+globl(ftr_fixup_prefix3_expected)
+ or 1,1,1
+ .long 1 << 26
+ .long 0x0000001
+ nop
+ or 3,3,3
diff --git a/arch/powerpc/lib/feature-fixups.c b/arch/powerpc/lib/feature-fixups.c
index 243011f85287..6fc499b1d63e 100644
--- a/arch/powerpc/lib/feature-fixups.c
+++ b/arch/powerpc/lib/feature-fixups.c
@@ -687,6 +687,75 @@ static void test_lwsync_macros(void)
}
}
+#ifdef __powerpc64__
+static void __init test_prefix_patching(void)
+{
+ extern unsigned int ftr_fixup_prefix1[];
+ extern unsigned int end_ftr_fixup_prefix1[];
+ extern unsigned int ftr_fixup_prefix1_orig[];
+ extern unsigned int ftr_fixup_prefix1_expected[];
+ int size = sizeof(unsigned int) * (end_ftr_fixup_prefix1 - ftr_fixup_prefix1);
+
+ fixup.value = fixup.mask = 8;
+ fixup.start_off = calc_offset(&fixup, ftr_fixup_prefix1 + 1);
+ fixup.end_off = calc_offset(&fixup, ftr_fixup_prefix1 + 3);
+ fixup.alt_start_off = fixup.alt_end_off = 0;
+
+ /* Sanity check */
+ check(memcmp(ftr_fixup_prefix1, ftr_fixup_prefix1_orig, size) == 0);
+
+ patch_feature_section(0, &fixup);
+ check(memcmp(ftr_fixup_prefix1, ftr_fixup_prefix1_expected, size) == 0);
+ check(memcmp(ftr_fixup_prefix1, ftr_fixup_prefix1_orig, size) != 0);
+}
+
+static void __init test_prefix_alt_patching(void)
+{
+ extern unsigned int ftr_fixup_prefix2[];
+ extern unsigned int end_ftr_fixup_prefix2[];
+ extern unsigned int ftr_fixup_prefix2_orig[];
+ extern unsigned int ftr_fixup_prefix2_expected[];
+ extern unsigned int ftr_fixup_prefix2_alt[];
+ int size = sizeof(unsigned int) * (end_ftr_fixup_prefix2 - ftr_fixup_prefix2);
+
+ fixup.value = fixup.mask = 8;
+ fixup.start_off = calc_offset(&fixup, ftr_fixup_prefix2 + 1);
+ fixup.end_off = calc_offset(&fixup, ftr_fixup_prefix2 + 3);
+ fixup.alt_start_off = calc_offset(&fixup, ftr_fixup_prefix2_alt);
+ fixup.alt_end_off = calc_offset(&fixup, ftr_fixup_prefix2_alt + 2);
+ /* Sanity check */
+ check(memcmp(ftr_fixup_prefix2, ftr_fixup_prefix2_orig, size) == 0);
+
+ patch_feature_section(0, &fixup);
+ check(memcmp(ftr_fixup_prefix2, ftr_fixup_prefix2_expected, size) == 0);
+ patch_feature_section(0, &fixup);
+ check(memcmp(ftr_fixup_prefix2, ftr_fixup_prefix2_orig, size) != 0);
+}
+
+static void __init test_prefix_word_alt_patching(void)
+{
+ extern unsigned int ftr_fixup_prefix3[];
+ extern unsigned int end_ftr_fixup_prefix3[];
+ extern unsigned int ftr_fixup_prefix3_orig[];
+ extern unsigned int ftr_fixup_prefix3_expected[];
+ extern unsigned int ftr_fixup_prefix3_alt[];
+ int size = sizeof(unsigned int) * (end_ftr_fixup_prefix3 - ftr_fixup_prefix3);
+
+ fixup.value = fixup.mask = 8;
+ fixup.start_off = calc_offset(&fixup, ftr_fixup_prefix3 + 1);
+ fixup.end_off = calc_offset(&fixup, ftr_fixup_prefix3 + 4);
+ fixup.alt_start_off = calc_offset(&fixup, ftr_fixup_prefix3_alt);
+ fixup.alt_end_off = calc_offset(&fixup, ftr_fixup_prefix3_alt + 3);
+ /* Sanity check */
+ check(memcmp(ftr_fixup_prefix3, ftr_fixup_prefix3_orig, size) == 0);
+
+ patch_feature_section(0, &fixup);
+ check(memcmp(ftr_fixup_prefix3, ftr_fixup_prefix3_expected, size) == 0);
+ patch_feature_section(0, &fixup);
+ check(memcmp(ftr_fixup_prefix3, ftr_fixup_prefix3_orig, size) != 0);
+}
+#endif /* __powerpc64__ */
+
static int __init test_feature_fixups(void)
{
printk(KERN_DEBUG "Running feature fixup self-tests ...\n");
@@ -701,6 +770,11 @@ static int __init test_feature_fixups(void)
test_cpu_macros();
test_fw_macros();
test_lwsync_macros();
+#ifdef __powerpc64__
+ test_prefix_patching();
+ test_prefix_alt_patching();
+ test_prefix_word_alt_patching();
+#endif
return 0;
}
--
2.17.1
next prev parent reply other threads:[~2020-04-28 2:50 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-28 1:57 [PATCH v6 00/28] Initial Prefixed Instruction support Jordan Niethe
2020-04-28 1:57 ` [PATCH v6 01/28] powerpc/xmon: Remove store_inst() for patch_instruction() Jordan Niethe
2020-04-28 1:57 ` [PATCH v6 02/28] powerpc/xmon: Move breakpoint instructions to own array Jordan Niethe
2020-04-28 1:57 ` [PATCH v6 03/28] powerpc/xmon: Move breakpoints to text section Jordan Niethe
2020-04-28 5:19 ` Christophe Leroy
2020-04-28 5:30 ` Jordan Niethe
2020-04-28 5:36 ` Christophe Leroy
2020-04-29 2:45 ` Jordan Niethe
2020-04-28 1:57 ` [PATCH v6 04/28] powerpc/xmon: Use bitwise calculations in_breakpoint_table() Jordan Niethe
2020-04-28 1:57 ` [PATCH v6 05/28] powerpc: Change calling convention for create_branch() et. al Jordan Niethe
2020-04-28 1:57 ` [PATCH v6 06/28] powerpc: Use a macro for creating instructions from u32s Jordan Niethe
2020-04-28 1:57 ` [PATCH v6 07/28] powerpc: Use an accessor for instructions Jordan Niethe
2020-04-28 1:57 ` [PATCH v6 08/28] powerpc: Use a function for getting the instruction op code Jordan Niethe
2020-04-28 1:57 ` [PATCH v6 09/28] powerpc: Use a function for byte swapping instructions Jordan Niethe
2020-04-28 1:57 ` [PATCH v6 10/28] powerpc: Introduce functions for instruction equality Jordan Niethe
2020-04-29 1:59 ` Alistair Popple
2020-04-29 2:52 ` Jordan Niethe
2020-04-28 1:57 ` [PATCH v6 11/28] powerpc: Use a datatype for instructions Jordan Niethe
2020-04-29 2:02 ` Alistair Popple
2020-04-29 2:57 ` Jordan Niethe
2020-04-28 1:57 ` [PATCH v6 12/28] powerpc: Use a function for reading instructions Jordan Niethe
2020-04-28 1:57 ` [PATCH v6 13/28] powerpc: Add a probe_user_read_inst() function Jordan Niethe
2020-04-28 1:58 ` [PATCH v6 14/28] powerpc: Add a probe_kernel_read_inst() function Jordan Niethe
2020-04-28 1:58 ` [PATCH v6 15/28] powerpc/kprobes: Use patch_instruction() Jordan Niethe
2020-04-28 1:58 ` [PATCH v6 16/28] powerpc: Define and use __get_user_instr{, inatomic}() Jordan Niethe
2020-04-28 1:58 ` [PATCH v6 17/28] powerpc: Introduce a function for reporting instruction length Jordan Niethe
2020-04-28 1:58 ` [PATCH v6 18/28] powerpc/xmon: Use a function for reading instructions Jordan Niethe
2020-04-28 1:58 ` [PATCH v6 19/28] powerpc/xmon: Move insertion of breakpoint for xol'ing Jordan Niethe
2020-04-28 1:58 ` [PATCH v6 20/28] powerpc: Make test_translate_branch() independent of instruction length Jordan Niethe
2020-04-28 1:58 ` [PATCH v6 21/28] powerpc: Enable Prefixed Instructions Jordan Niethe
2020-04-28 1:58 ` [PATCH v6 22/28] powerpc: Define new SRR1 bits for a future ISA version Jordan Niethe
2020-04-28 1:58 ` [PATCH v6 23/28] powerpc: Add prefixed instructions to instruction data type Jordan Niethe
2020-04-28 1:58 ` [PATCH v6 24/28] powerpc: Test prefixed code patching Jordan Niethe
2020-04-28 1:58 ` Jordan Niethe [this message]
2020-04-28 1:58 ` [PATCH v6 26/28] powerpc: Support prefixed instructions in alignment handler Jordan Niethe
2020-04-28 1:58 ` [PATCH v6 27/28] powerpc sstep: Add support for prefixed load/stores Jordan Niethe
2020-04-28 1:58 ` [PATCH v6 28/28] powerpc sstep: Add support for prefixed fixed-point arithmetic Jordan Niethe
2020-04-28 10:06 ` [PATCH v6 00/28] Initial Prefixed Instruction support Balamuruhan S
2020-04-29 2:51 ` Jordan Niethe
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