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authorRichard Henderson <richard.henderson@linaro.org>2020-06-25 20:31:37 -0700
committerPeter Maydell <peter.maydell@linaro.org>2020-06-26 14:31:12 +0100
commiteb821168db798302bd124a3b000cebc23bd0a395 (patch)
tree45b09bdd604366e170b7d18f084242a80a1edc25 /target
parentc4af8ba19b9d22aac79cab679a20b159af9d6809 (diff)
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target/arm: Implement data cache set allocation tags
This is DC GVA and DC GZVA, and the tag check for DC ZVA. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20200626033144.790098-40-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target')
-rw-r--r--target/arm/cpu.h4
-rw-r--r--target/arm/helper.c16
-rw-r--r--target/arm/translate-a64.c39
3 files changed, 58 insertions, 1 deletions
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index 3bf0518..513c389 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -2360,7 +2360,9 @@ 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.c b/target/arm/helper.c
index 44a3f9f..23cf44f 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -6998,6 +6998,22 @@ static const ARMCPRegInfo mte_el0_cacheop_reginfo[] = {
.opc0 = 1, .opc1 = 3, .crn = 7, .crm = 14, .opc2 = 5,
.type = ARM_CP_NOP, .access = PL0_W,
.accessfn = aa64_cacheop_poc_access },
+ { .name = "DC_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 = "DC_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/translate-a64.c b/target/arm/translate-a64.c
index c20af6e..73d753f 100644
--- a/target/arm/translate-a64.c
+++ b/target/arm/translate-a64.c
@@ -1874,6 +1874,45 @@ static void handle_sys(DisasContext *s, uint32_t insn, bool isread,
}
gen_helper_dc_zva(cpu_env, tcg_rt);
return;
+ case ARM_CP_DC_GVA:
+ {
+ TCGv_i64 clean_addr, tag;
+
+ /*
+ * DC_GVA, like DC_ZVA, requires that we supply the original
+ * pointer for an invalid page. Probe that address first.
+ */
+ tcg_rt = cpu_reg(s, rt);
+ clean_addr = clean_data_tbi(s, tcg_rt);
+ gen_probe_access(s, clean_addr, MMU_DATA_STORE, MO_8);
+
+ if (s->ata) {
+ /* Extract the tag from the register to match STZGM. */
+ tag = tcg_temp_new_i64();
+ tcg_gen_shri_i64(tag, tcg_rt, 56);
+ gen_helper_stzgm_tags(cpu_env, clean_addr, tag);
+ tcg_temp_free_i64(tag);
+ }
+ }
+ return;
+ case ARM_CP_DC_GZVA:
+ {
+ TCGv_i64 clean_addr, tag;
+
+ /* For DC_GZVA, we can rely on DC_ZVA for the proper fault. */
+ tcg_rt = cpu_reg(s, rt);
+ clean_addr = clean_data_tbi(s, tcg_rt);
+ gen_helper_dc_zva(cpu_env, clean_addr);
+
+ if (s->ata) {
+ /* Extract the tag from the register to match STZGM. */
+ tag = tcg_temp_new_i64();
+ tcg_gen_shri_i64(tag, tcg_rt, 56);
+ gen_helper_stzgm_tags(cpu_env, clean_addr, tag);
+ tcg_temp_free_i64(tag);
+ }
+ }
+ return;
default:
break;
}