qemu-devel.nongnu.org archive mirror
 help / color / mirror / Atom feed
From: Alexey Baturo <baturo.alexey@gmail.com>
Cc: baturo.alexey@gmail.com, qemu-riscv@nongnu.org,
	sagark@eecs.berkeley.edu, kbastian@mail.uni-paderborn.de,
	richard.henderson@linaro.org, qemu-devel@nongnu.org,
	space.monkey.delivers@gmail.com,
	Alistair Francis <alistair.francis@wdc.com>,
	kupokupokupopo@gmail.com, palmer@dabbelt.com
Subject: [PATCH v16 7/8] [RISCV_PM] Implement address masking functions required for RISC-V Pointer Masking extension
Date: Fri, 22 Oct 2021 21:19:09 +0300	[thread overview]
Message-ID: <20211022181910.1999197-8-space.monkey.delivers@gmail.com> (raw)
In-Reply-To: <20211022181910.1999197-1-space.monkey.delivers@gmail.com>

From: Anatoly Parshintsev <kupokupokupopo@gmail.com>

Signed-off-by: Anatoly Parshintsev <kupokupokupopo@gmail.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
---
 target/riscv/cpu.h        |  2 ++
 target/riscv/cpu_helper.c | 18 ++++++++++++++++++
 target/riscv/translate.c  | 39 +++++++++++++++++++++++++++++++++++++--
 3 files changed, 57 insertions(+), 2 deletions(-)

diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index b2422e3f99..325908287d 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -410,6 +410,8 @@ FIELD(TB_FLAGS, HLSX, 10, 1)
 FIELD(TB_FLAGS, MSTATUS_HS_FS, 11, 2)
 /* The combination of MXL/SXL/UXL that applies to the current cpu mode. */
 FIELD(TB_FLAGS, XL, 13, 2)
+/* If PointerMasking should be applied */
+FIELD(TB_FLAGS, PM_ENABLED, 15, 1)
 
 #ifdef TARGET_RISCV32
 #define riscv_cpu_mxl(env)  ((void)(env), MXL_RV32)
diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
index 0d1132f39d..662228c238 100644
--- a/target/riscv/cpu_helper.c
+++ b/target/riscv/cpu_helper.c
@@ -107,6 +107,24 @@ void cpu_get_tb_cpu_state(CPURISCVState *env, target_ulong *pc,
         flags = FIELD_DP32(flags, TB_FLAGS, MSTATUS_HS_FS,
                            get_field(env->mstatus_hs, MSTATUS_FS));
     }
+    if (riscv_has_ext(env, RVJ)) {
+        int priv = flags & TB_FLAGS_PRIV_MMU_MASK;
+        bool pm_enabled = false;
+        switch (priv) {
+        case PRV_U:
+            pm_enabled = env->mmte & U_PM_ENABLE;
+            break;
+        case PRV_S:
+            pm_enabled = env->mmte & S_PM_ENABLE;
+            break;
+        case PRV_M:
+            pm_enabled = env->mmte & M_PM_ENABLE;
+            break;
+        default:
+            g_assert_not_reached();
+        }
+        flags = FIELD_DP32(flags, TB_FLAGS, PM_ENABLED, pm_enabled);
+    }
 #endif
 
     flags = FIELD_DP32(flags, TB_FLAGS, XL, cpu_get_xl(env));
diff --git a/target/riscv/translate.c b/target/riscv/translate.c
index a5e6fa145d..1d57bc97b5 100644
--- a/target/riscv/translate.c
+++ b/target/riscv/translate.c
@@ -36,6 +36,9 @@ static TCGv cpu_gpr[32], cpu_pc, cpu_vl;
 static TCGv_i64 cpu_fpr[32]; /* assume F and D extensions */
 static TCGv load_res;
 static TCGv load_val;
+/* globals for PM CSRs */
+static TCGv pm_mask[4];
+static TCGv pm_base[4];
 
 #include "exec/gen-icount.h"
 
@@ -83,6 +86,10 @@ typedef struct DisasContext {
     TCGv zero;
     /* Space for 3 operands plus 1 extra for address computation. */
     TCGv temp[4];
+    /* PointerMasking extension */
+    bool pm_enabled;
+    TCGv pm_mask;
+    TCGv pm_base;
 } DisasContext;
 
 static inline bool has_ext(DisasContext *ctx, uint32_t ext)
@@ -272,11 +279,20 @@ static void gen_jal(DisasContext *ctx, int rd, target_ulong imm)
 }
 
 /*
- * Temp stub: generates address adjustment for PointerMasking
+ * Generates address adjustment for PointerMasking
  */
 static TCGv gen_pm_adjust_address(DisasContext *s, TCGv src)
 {
-    return src;
+    TCGv temp;
+    if (!s->pm_enabled) {
+        /* Load unmodified address */
+        return src;
+    } else {
+        temp = temp_new(s);
+        tcg_gen_andc_tl(temp, src, s->pm_mask);
+        tcg_gen_or_tl(temp, temp, s->pm_base);
+        return temp;
+    }
 }
 
 #ifndef CONFIG_USER_ONLY
@@ -622,6 +638,10 @@ static void riscv_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cs)
     ctx->cs = cs;
     ctx->ntemp = 0;
     memset(ctx->temp, 0, sizeof(ctx->temp));
+    ctx->pm_enabled = FIELD_EX32(tb_flags, TB_FLAGS, PM_ENABLED);
+    int priv = tb_flags & TB_FLAGS_PRIV_MMU_MASK;
+    ctx->pm_mask = pm_mask[priv];
+    ctx->pm_base = pm_base[priv];
 
     ctx->zero = tcg_constant_tl(0);
 }
@@ -735,4 +755,19 @@ void riscv_translate_init(void)
                              "load_res");
     load_val = tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, load_val),
                              "load_val");
+#ifndef CONFIG_USER_ONLY
+    /* Assign PM CSRs to tcg globals */
+    pm_mask[PRV_U] =
+      tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, upmmask), "upmmask");
+    pm_base[PRV_U] =
+      tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, upmbase), "upmbase");
+    pm_mask[PRV_S] =
+      tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, spmmask), "spmmask");
+    pm_base[PRV_S] =
+      tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, spmbase), "spmbase");
+    pm_mask[PRV_M] =
+      tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, mpmmask), "mpmmask");
+    pm_base[PRV_M] =
+      tcg_global_mem_new(cpu_env, offsetof(CPURISCVState, mpmbase), "mpmbase");
+#endif
 }
-- 
2.30.2



  parent reply	other threads:[~2021-10-22 18:33 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-10-22 18:19 [PATCH v16 0/8] RISC-V Pointer Masking implementation Alexey Baturo
2021-10-22 18:19 ` [PATCH v16 1/8] [RISCV_PM] Add J-extension into RISC-V Alexey Baturo
2021-10-22 18:19 ` [PATCH v16 2/8] [RISCV_PM] Add CSR defines for RISC-V PM extension Alexey Baturo
2021-10-22 18:19 ` [PATCH v16 3/8] [RISCV_PM] Support CSRs required for RISC-V PM extension except for the h-mode Alexey Baturo
2021-10-25  5:53   ` Alistair Francis
2021-10-22 18:19 ` [PATCH v16 4/8] [RISCV_PM] Add J extension state description Alexey Baturo
2021-10-22 18:19 ` [PATCH v16 5/8] [RISCV_PM] Print new PM CSRs in QEMU logs Alexey Baturo
2021-10-25  1:21   ` Alistair Francis
2021-10-22 18:19 ` [PATCH v16 6/8] [RISCV_PM] Support pointer masking for RISC-V for i/c/f/d/a types of instructions Alexey Baturo
2021-10-22 18:19 ` Alexey Baturo [this message]
2021-10-22 18:19 ` [PATCH v16 8/8] [RISCV_PM] Allow experimental J-ext to be turned on Alexey Baturo
2021-10-25  4:16 ` [PATCH v16 0/8] RISC-V Pointer Masking implementation Alistair Francis

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20211022181910.1999197-8-space.monkey.delivers@gmail.com \
    --to=baturo.alexey@gmail.com \
    --cc=alistair.francis@wdc.com \
    --cc=kbastian@mail.uni-paderborn.de \
    --cc=kupokupokupopo@gmail.com \
    --cc=palmer@dabbelt.com \
    --cc=qemu-devel@nongnu.org \
    --cc=qemu-riscv@nongnu.org \
    --cc=richard.henderson@linaro.org \
    --cc=sagark@eecs.berkeley.edu \
    --cc=space.monkey.delivers@gmail.com \
    --subject='Re: [PATCH v16 7/8] [RISCV_PM] Implement address masking functions required for RISC-V Pointer Masking extension' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).