[PATCH v5 04/20] target/arm: Add RME cpregs

[Richard Henderson]

This includes GPCCR, GPTBR, MFAR, the TLB flush insns PAALL, PAALLOS,
RPALOS, RPAOS, and the cache flush insns CIPAPA and CIGDPAPA.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
 target/arm/cpu.h    | 19 ++++++++++
 target/arm/helper.c | 84 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 103 insertions(+)

diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index 318d1033b8..c9c87b515d 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -541,6 +541,11 @@ typedef struct CPUArchState {
         uint64_t fgt_read[2]; /* HFGRTR, HDFGRTR */
         uint64_t fgt_write[2]; /* HFGWTR, HDFGWTR */
         uint64_t fgt_exec[1]; /* HFGITR */
+
+        /* RME registers */
+        uint64_t gpccr_el3;
+        uint64_t gptbr_el3;
+        uint64_t mfar_el3;
     } cp15;
 
     struct {
@@ -1055,6 +1060,7 @@ struct ArchCPU {
     uint64_t reset_cbar;
     uint32_t reset_auxcr;
     bool reset_hivecs;
+    uint8_t reset_l0gptsz;
 
     /*
      * Intermediate values used during property parsing.
@@ -2341,6 +2347,19 @@ FIELD(MVFR1, SIMDFMAC, 28, 4)
 FIELD(MVFR2, SIMDMISC, 0, 4)
 FIELD(MVFR2, FPMISC, 4, 4)
 
+FIELD(GPCCR, PPS, 0, 3)
+FIELD(GPCCR, IRGN, 8, 2)
+FIELD(GPCCR, ORGN, 10, 2)
+FIELD(GPCCR, SH, 12, 2)
+FIELD(GPCCR, PGS, 14, 2)
+FIELD(GPCCR, GPC, 16, 1)
+FIELD(GPCCR, GPCP, 17, 1)
+FIELD(GPCCR, L0GPTSZ, 20, 4)
+
+FIELD(MFAR, FPA, 12, 40)
+FIELD(MFAR, NSE, 62, 1)
+FIELD(MFAR, NS, 63, 1)
+
 QEMU_BUILD_BUG_ON(ARRAY_SIZE(((ARMCPU *)0)->ccsidr) <= 
R_V7M_CSSELR_INDEX_MASK);
 
 /* If adding a feature bit which corresponds to a Linux ELF
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 9132d4de6a..006447dde8 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -6910,6 +6910,83 @@ static const ARMCPRegInfo sme_reginfo[] = {
       .access = PL2_RW, .accessfn = access_esm,
       .type = ARM_CP_CONST, .resetvalue = 0 },
 };
+
+static void tlbi_aa64_paall_write(CPUARMState *env, const ARMCPRegInfo *ri,
+                                  uint64_t value)
+{
+    CPUState *cs = env_cpu(env);
+
+    tlb_flush(cs);
+}
+
+static void gpccr_write(CPUARMState *env, const ARMCPRegInfo *ri,
+                        uint64_t value)
+{
+    /* L0GPTSZ is RO; other bits not mentioned are RES0. */
+    uint64_t rw_mask = R_GPCCR_PPS_MASK | R_GPCCR_IRGN_MASK |
+        R_GPCCR_ORGN_MASK | R_GPCCR_SH_MASK | R_GPCCR_PGS_MASK |
+        R_GPCCR_GPC_MASK | R_GPCCR_GPCP_MASK;
+
+    env->cp15.gpccr_el3 = (value & rw_mask) | (env->cp15.gpccr_el3 & ~rw_mask);
+}
+
+static void gpccr_reset(CPUARMState *env, const ARMCPRegInfo *ri)
+{
+    env->cp15.gpccr_el3 = FIELD_DP64(0, GPCCR, L0GPTSZ,
+                                     env_archcpu(env)->reset_l0gptsz);
+}
+
+static void tlbi_aa64_paallos_write(CPUARMState *env, const ARMCPRegInfo *ri,
+                                    uint64_t value)
+{
+    CPUState *cs = env_cpu(env);
+
+    tlb_flush_all_cpus_synced(cs);
+}
+
+static const ARMCPRegInfo rme_reginfo[] = {
+    { .name = "GPCCR_EL3", .state = ARM_CP_STATE_AA64,
+      .opc0 = 3, .opc1 = 6, .crn = 2, .crm = 1, .opc2 = 6,
+      .access = PL3_RW, .writefn = gpccr_write, .resetfn = gpccr_reset,
+      .fieldoffset = offsetof(CPUARMState, cp15.gpccr_el3) },
+    { .name = "GPTBR_EL3", .state = ARM_CP_STATE_AA64,
+      .opc0 = 3, .opc1 = 6, .crn = 2, .crm = 1, .opc2 = 4,
+      .access = PL3_RW, .fieldoffset = offsetof(CPUARMState, cp15.gptbr_el3) },
+    { .name = "MFAR_EL3", .state = ARM_CP_STATE_AA64,
+      .opc0 = 3, .opc1 = 6, .crn = 6, .crm = 0, .opc2 = 5,
+      .access = PL3_RW, .fieldoffset = offsetof(CPUARMState, cp15.mfar_el3) },
+    { .name = "TLBI_PAALL", .state = ARM_CP_STATE_AA64,
+      .opc0 = 1, .opc1 = 6, .crn = 8, .crm = 7, .opc2 = 4,
+      .access = PL3_W, .type = ARM_CP_NO_RAW,
+      .writefn = tlbi_aa64_paall_write },
+    { .name = "TLBI_PAALLOS", .state = ARM_CP_STATE_AA64,
+      .opc0 = 1, .opc1 = 6, .crn = 8, .crm = 1, .opc2 = 4,
+      .access = PL3_W, .type = ARM_CP_NO_RAW,
+      .writefn = tlbi_aa64_paallos_write },
+    /*
+     * QEMU does not have a way to invalidate by physical address, thus
+     * invalidating a range of physical addresses is accomplished by
+     * flushing all tlb entries in the outer sharable domain,
+     * just like PAALLOS.
+     */
+    { .name = "TLBI_RPALOS", .state = ARM_CP_STATE_AA64,
+      .opc0 = 1, .opc1 = 6, .crn = 8, .crm = 4, .opc2 = 7,
+      .access = PL3_W, .type = ARM_CP_NO_RAW,
+      .writefn = tlbi_aa64_paallos_write },
+    { .name = "TLBI_RPAOS", .state = ARM_CP_STATE_AA64,
+      .opc0 = 1, .opc1 = 6, .crn = 8, .crm = 4, .opc2 = 3,
+      .access = PL3_W, .type = ARM_CP_NO_RAW,
+      .writefn = tlbi_aa64_paallos_write },
+    { .name = "DC_CIPAPA", .state = ARM_CP_STATE_AA64,
+      .opc0 = 1, .opc1 = 6, .crn = 7, .crm = 14, .opc2 = 1,
+      .access = PL3_W, .type = ARM_CP_NOP },
+};
+
+static const ARMCPRegInfo rme_mte_reginfo[] = {
+    { .name = "DC_CIGDPAPA", .state = ARM_CP_STATE_AA64,
+      .opc0 = 1, .opc1 = 6, .crn = 7, .crm = 14, .opc2 = 5,
+      .access = PL3_W, .type = ARM_CP_NOP },
+};
 #endif /* TARGET_AARCH64 */
 
 static void define_pmu_regs(ARMCPU *cpu)
@@ -9130,6 +9207,13 @@ void register_cp_regs_for_features(ARMCPU *cpu)
     if (cpu_isar_feature(aa64_fgt, cpu)) {
         define_arm_cp_regs(cpu, fgt_reginfo);
     }
+
+    if (cpu_isar_feature(aa64_rme, cpu)) {
+        define_arm_cp_regs(cpu, rme_reginfo);
+        if (cpu_isar_feature(aa64_mte, cpu)) {
+            define_arm_cp_regs(cpu, rme_mte_reginfo);
+        }
+    }
 #endif
 
     if (cpu_isar_feature(any_predinv, cpu)) {
-- 
2.34.1