From: Richard Henderson <richard.henderson@linaro.org>
To: qemu-devel@nongnu.org
Cc: peter.maydell@linaro.org, qemu-arm@nongnu.org
Subject: [PATCH v5 16/22] target/arm: Implement data cache set allocation tags
Date: Fri, 11 Oct 2019 09:47:38 -0400 [thread overview]
Message-ID: <20191011134744.2477-17-richard.henderson@linaro.org> (raw)
In-Reply-To: <20191011134744.2477-1-richard.henderson@linaro.org>
This is DC GVA and DC GZVA.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
v2: Use allocation_tag_mem + memset.
v3: Require pre-cleaned addresses.
---
target/arm/cpu.h | 4 +++-
target/arm/helper-a64.h | 1 +
target/arm/helper.c | 16 ++++++++++++++++
target/arm/mte_helper.c | 28 ++++++++++++++++++++++++++++
target/arm/translate-a64.c | 9 +++++++++
5 files changed, 57 insertions(+), 1 deletion(-)
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index d99bb5e956..93a362708b 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -2233,7 +2233,9 @@ static inline uint64_t cpreg_to_kvm_id(uint32_t cpregid)
#define ARM_CP_NZCV (ARM_CP_SPECIAL | 0x0300)
#define ARM_CP_CURRENTEL (ARM_CP_SPECIAL | 0x0400)
#define ARM_CP_DC_ZVA (ARM_CP_SPECIAL | 0x0500)
-#define ARM_LAST_SPECIAL ARM_CP_DC_ZVA
+#define ARM_CP_DC_GVA (ARM_CP_SPECIAL | 0x0600)
+#define ARM_CP_DC_GZVA (ARM_CP_SPECIAL | 0x0700)
+#define ARM_LAST_SPECIAL ARM_CP_DC_GZVA
#define ARM_CP_FPU 0x1000
#define ARM_CP_SVE 0x2000
#define ARM_CP_NO_GDB 0x4000
diff --git a/target/arm/helper-a64.h b/target/arm/helper-a64.h
index 405aa60016..c82605b51e 100644
--- a/target/arm/helper-a64.h
+++ b/target/arm/helper-a64.h
@@ -118,3 +118,4 @@ DEF_HELPER_FLAGS_3(st2g_parallel, TCG_CALL_NO_WG, void, env, i64, i64)
DEF_HELPER_FLAGS_2(ldgm, TCG_CALL_NO_WG, i64, env, i64)
DEF_HELPER_FLAGS_3(stgm, TCG_CALL_NO_WG, void, env, i64, i64)
DEF_HELPER_FLAGS_3(stzgm, TCG_CALL_NO_WG, void, env, i64, i64)
+DEF_HELPER_FLAGS_2(dc_gva, TCG_CALL_NO_RWG, void, env, i64)
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 33bc176e1c..eec9064d88 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -6026,6 +6026,22 @@ static const ARMCPRegInfo mte_reginfo[] = {
{ .name = "CIGDVAC", .state = ARM_CP_STATE_AA64,
.opc0 = 1, .opc1 = 3, .crn = 7, .crm = 14, .opc2 = 5,
.type = ARM_CP_NOP, .access = PL1_W },
+ { .name = "GVA", .state = ARM_CP_STATE_AA64,
+ .opc0 = 1, .opc1 = 3, .crn = 7, .crm = 4, .opc2 = 3,
+ .access = PL0_W, .type = ARM_CP_DC_GVA,
+#ifndef CONFIG_USER_ONLY
+ /* Avoid overhead of an access check that always passes in user-mode */
+ .accessfn = aa64_zva_access,
+#endif
+ },
+ { .name = "GZVA", .state = ARM_CP_STATE_AA64,
+ .opc0 = 1, .opc1 = 3, .crn = 7, .crm = 4, .opc2 = 4,
+ .access = PL0_W, .type = ARM_CP_DC_GZVA,
+#ifndef CONFIG_USER_ONLY
+ /* Avoid overhead of an access check that always passes in user-mode */
+ .accessfn = aa64_zva_access,
+#endif
+ },
REGINFO_SENTINEL
};
diff --git a/target/arm/mte_helper.c b/target/arm/mte_helper.c
index f1315bae37..e8d8a6bedb 100644
--- a/target/arm/mte_helper.c
+++ b/target/arm/mte_helper.c
@@ -510,3 +510,31 @@ void HELPER(stzgm)(CPUARMState *env, uint64_t ptr, uint64_t val)
}
}
}
+
+void HELPER(dc_gva)(CPUARMState *env, uint64_t ptr)
+{
+ ARMCPU *cpu = env_archcpu(env);
+ size_t blocklen = 4 << cpu->dcz_blocksize;
+ int el;
+ uint64_t sctlr;
+ uint8_t *mem;
+ int rtag;
+
+ ptr = QEMU_ALIGN_DOWN(ptr, blocklen);
+
+ /* Trap if accessing an invalid page. */
+ mem = allocation_tag_mem(env, ptr, true, GETPC());
+
+ /* No action if page does not support tags, or if access is disabled. */
+ el = arm_current_el(env);
+ sctlr = arm_sctlr(env, el);
+ if (!mem || !allocation_tag_access_enabled(env, el, sctlr)) {
+ return;
+ }
+
+ rtag = allocation_tag_from_addr(ptr);
+ rtag |= rtag << 4;
+
+ assert(QEMU_IS_ALIGNED(blocklen, 2 * TAG_GRANULE));
+ memset(mem, rtag, blocklen / (2 * TAG_GRANULE));
+}
diff --git a/target/arm/translate-a64.c b/target/arm/translate-a64.c
index 49817b96ae..31260f97f9 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -1769,6 +1769,15 @@ static void handle_sys(DisasContext *s, uint32_t insn, bool isread,
tcg_rt = clean_data_tbi(s, cpu_reg(s, rt), false);
gen_helper_dc_zva(cpu_env, tcg_rt);
return;
+ case ARM_CP_DC_GVA:
+ tcg_rt = clean_data_tbi(s, cpu_reg(s, rt), false);
+ gen_helper_dc_gva(cpu_env, tcg_rt);
+ return;
+ case ARM_CP_DC_GZVA:
+ tcg_rt = clean_data_tbi(s, cpu_reg(s, rt), false);
+ gen_helper_dc_zva(cpu_env, tcg_rt);
+ gen_helper_dc_gva(cpu_env, tcg_rt);
+ return;
default:
break;
}
--
2.17.1
next prev parent reply other threads:[~2019-10-11 14:06 UTC|newest]
Thread overview: 58+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-10-11 13:47 [PATCH v5 00/22] target/arm: Implement ARMv8.5-MemTag, system mode Richard Henderson
2019-10-11 13:47 ` [PATCH v5 01/22] target/arm: Add MTE_ACTIVE to tb_flags Richard Henderson
2019-10-11 13:47 ` [PATCH v5 02/22] target/arm: Add regime_has_2_ranges Richard Henderson
2019-12-03 11:01 ` Peter Maydell
2019-12-03 15:09 ` Richard Henderson
2019-10-11 13:47 ` [PATCH v5 03/22] target/arm: Add MTE system registers Richard Henderson
2019-12-03 11:48 ` Peter Maydell
2019-12-06 14:47 ` Richard Henderson
2019-10-11 13:47 ` [PATCH v5 04/22] target/arm: Add helper_mte_check{1,2,3} Richard Henderson
2019-12-03 13:42 ` Peter Maydell
2019-12-03 16:06 ` Richard Henderson
2019-12-03 16:26 ` Peter Maydell
2019-12-03 16:14 ` Richard Henderson
2019-10-11 13:47 ` [PATCH v5 05/22] target/arm: Suppress tag check for sp+offset Richard Henderson
2019-12-03 14:07 ` Peter Maydell
2020-02-17 21:32 ` Richard Henderson
2019-10-11 13:47 ` [PATCH v5 06/22] target/arm: Implement the IRG instruction Richard Henderson
2019-12-03 14:26 ` Peter Maydell
2019-10-11 13:47 ` [PATCH v5 07/22] target/arm: Implement ADDG, SUBG instructions Richard Henderson
2019-10-11 13:47 ` [PATCH v5 08/22] target/arm: Implement the GMI instruction Richard Henderson
2019-10-11 13:47 ` [PATCH v5 09/22] target/arm: Implement the SUBP instruction Richard Henderson
2019-10-11 13:47 ` [PATCH v5 10/22] target/arm: Define arm_cpu_do_unaligned_access for CONFIG_USER_ONLY Richard Henderson
2019-12-05 16:12 ` Peter Maydell
2020-02-17 22:56 ` Richard Henderson
2019-10-11 13:47 ` [PATCH v5 11/22] target/arm: Implement LDG, STG, ST2G instructions Richard Henderson
2019-12-05 17:07 ` Peter Maydell
2019-10-11 13:47 ` [PATCH v5 12/22] target/arm: Implement the STGP instruction Richard Henderson
2019-12-05 17:15 ` Peter Maydell
2019-10-11 13:47 ` [PATCH v5 13/22] target/arm: Implement the LDGM and STGM instructions Richard Henderson
2019-12-05 17:42 ` Peter Maydell
2019-10-11 13:47 ` [PATCH v5 14/22] target/arm: Implement the access tag cache flushes Richard Henderson
2019-12-05 17:49 ` Peter Maydell
2019-10-11 13:47 ` [PATCH v5 15/22] target/arm: Clean address for DC ZVA Richard Henderson
2019-12-05 17:54 ` Peter Maydell
2019-12-05 18:58 ` Peter Maydell
2020-02-18 0:50 ` Richard Henderson
2020-02-18 11:10 ` Peter Maydell
2019-10-11 13:47 ` Richard Henderson [this message]
2019-12-05 18:17 ` [PATCH v5 16/22] target/arm: Implement data cache set allocation tags Peter Maydell
2020-02-18 1:19 ` Richard Henderson
2019-10-11 13:47 ` [PATCH v5 17/22] target/arm: Set PSTATE.TCO on exception entry Richard Henderson
2019-10-11 13:47 ` [PATCH v5 18/22] target/arm: Enable MTE Richard Henderson
2019-12-05 18:23 ` Peter Maydell
2019-10-11 13:47 ` [PATCH v5 19/22] target/arm: Cache the Tagged bit for a page in MemTxAttrs Richard Henderson
2019-12-05 18:32 ` Peter Maydell
2019-10-11 13:47 ` [PATCH v5 20/22] target/arm: Create tagged ram when MTE is enabled Richard Henderson
2019-12-05 18:40 ` Peter Maydell
2019-12-05 19:24 ` Richard Henderson
2019-12-06 9:51 ` Peter Maydell
2019-10-11 13:47 ` [PATCH v5 21/22] target/arm: Add mmu indexes for tag memory Richard Henderson
2019-12-06 11:46 ` Peter Maydell
2019-12-06 14:03 ` Richard Henderson
2019-10-11 13:47 ` [PATCH v5 22/22] target/arm: Add allocation tag storage for system mode Richard Henderson
2019-12-06 13:02 ` Peter Maydell
2019-12-06 14:14 ` Richard Henderson
2019-10-11 19:32 ` [PATCH v5 00/22] target/arm: Implement ARMv8.5-MemTag, " no-reply
2019-10-15 20:39 ` Evgenii Stepanov
2019-10-15 22:04 ` Richard Henderson
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