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[PATCH 3/7] target/arm: Implement v8.3 EnhancedPAC
From: |
Aaron Lindsay |
Subject: |
[PATCH 3/7] target/arm: Implement v8.3 EnhancedPAC |
Date: |
Thu, 2 Feb 2023 16:11:25 -0500 |
Signed-off-by: Aaron Lindsay <aaron@os.amperecomputing.com>
---
target/arm/pauth_helper.c | 14 +++++++++-----
1 file changed, 9 insertions(+), 5 deletions(-)
diff --git a/target/arm/pauth_helper.c b/target/arm/pauth_helper.c
index f525ef7fad..a83956652f 100644
--- a/target/arm/pauth_helper.c
+++ b/target/arm/pauth_helper.c
@@ -347,11 +347,15 @@ static uint64_t pauth_addpac(CPUARMState *env, uint64_t
ptr, uint64_t modifier,
*/
test = sextract64(ptr, bot_bit, top_bit - bot_bit);
if (test != 0 && test != -1) {
- /*
- * Note that our top_bit is one greater than the pseudocode's
- * version, hence "- 2" here.
- */
- pac ^= MAKE_64BIT_MASK(top_bit - 2, 1);
+ if (cpu_isar_feature(aa64_pauth_epac, env_archcpu(env))) {
+ pac = 0;
+ } else {
+ /*
+ * Note that our top_bit is one greater than the pseudocode's
+ * version, hence "- 2" here.
+ */
+ pac ^= MAKE_64BIT_MASK(top_bit - 2, 1);
+ }
}
/*
--
2.25.1
- [PATCH 0/7] Implement Most ARMv8.3 Pointer Authentication Features, Aaron Lindsay, 2023/02/02
- [PATCH 1/7] target/arm: v8.3 PAC ID_AA64ISAR[12] feature-detection, Aaron Lindsay, 2023/02/02
- [PATCH 3/7] target/arm: Implement v8.3 EnhancedPAC,
Aaron Lindsay <=
- [PATCH 2/7] target/arm: Implement v8.3 QARMA3 PAC cipher, Aaron Lindsay, 2023/02/02
- [PATCH 4/7] target/arm: Implement v8.3 Pauth2, Aaron Lindsay, 2023/02/02
- [PATCH 5/7] targer/arm: Inform helpers whether a PAC instruction is 'combined', Aaron Lindsay, 2023/02/02
- [PATCH 6/7] target/arm: Implement v8.3 FPAC and FPACCOMBINE, Aaron Lindsay, 2023/02/02
- [PATCH 7/7] target/arm: Add CPU properties for most v8.3 PAC features, Aaron Lindsay, 2023/02/02