From: frank.chang@sifive.com
To: qemu-devel@nongnu.org, qemu-riscv@nongnu.org
Cc: Alistair Francis <Alistair.Francis@wdc.com>,
Sagar Karandikar <sagark@eecs.berkeley.edu>,
Frank Chang <frank.chang@sifive.com>,
Bastian Koppelmann <kbastian@mail.uni-paderborn.de>,
Hsiangkai Wang <kai.wang@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Greentime Hu <greentime.hu@sifive.com>
Subject: [PATCH v7 68/75] target/riscv: gdb: support vector registers for rv64 & rv32
Date: Fri, 26 Feb 2021 11:18:52 +0800 [thread overview]
Message-ID: <20210226031902.23656-69-frank.chang@sifive.com> (raw)
In-Reply-To: <20210226031902.23656-1-frank.chang@sifive.com>
From: Hsiangkai Wang <kai.wang@sifive.com>
Signed-off-by: Hsiangkai Wang <kai.wang@sifive.com>
Signed-off-by: Greentime Hu <greentime.hu@sifive.com>
Signed-off-by: Frank Chang <frank.chang@sifive.com>
---
target/riscv/cpu.c | 2 +
target/riscv/cpu.h | 1 +
target/riscv/gdbstub.c | 184 +++++++++++++++++++++++++++++++++++++++++
3 files changed, 187 insertions(+)
diff --git a/target/riscv/cpu.c b/target/riscv/cpu.c
index d95165b3acb..a110b6ead9b 100644
--- a/target/riscv/cpu.c
+++ b/target/riscv/cpu.c
@@ -575,6 +575,8 @@ static const char *riscv_gdb_get_dynamic_xml(CPUState *cs, const char *xmlname)
if (strcmp(xmlname, "riscv-csr.xml") == 0) {
return cpu->dyn_csr_xml;
+ } else if (strcmp(xmlname, "riscv-vector.xml") == 0) {
+ return cpu->dyn_vreg_xml;
}
return NULL;
diff --git a/target/riscv/cpu.h b/target/riscv/cpu.h
index ad2497229db..f324949beb1 100644
--- a/target/riscv/cpu.h
+++ b/target/riscv/cpu.h
@@ -275,6 +275,7 @@ struct RISCVCPU {
CPURISCVState env;
char *dyn_csr_xml;
+ char *dyn_vreg_xml;
/* Configuration Settings */
struct {
diff --git a/target/riscv/gdbstub.c b/target/riscv/gdbstub.c
index 5f96b7ea2a9..dd883612c77 100644
--- a/target/riscv/gdbstub.c
+++ b/target/riscv/gdbstub.c
@@ -20,6 +20,32 @@
#include "exec/gdbstub.h"
#include "cpu.h"
+struct TypeSize {
+ const char *gdb_type;
+ const char *id;
+ int size;
+ const char suffix;
+};
+
+static const struct TypeSize vec_lanes[] = {
+ /* quads */
+ { "uint128", "quads", 128, 'q' },
+ /* 64 bit */
+ { "uint64", "longs", 64, 'l' },
+ /* 32 bit */
+ { "uint32", "words", 32, 'w' },
+ /* 16 bit */
+ { "uint16", "shorts", 16, 's' },
+ /*
+ * TODO: currently there is no reliable way of telling
+ * if the remote gdb actually understands ieee_half so
+ * we don't expose it in the target description for now.
+ * { "ieee_half", 16, 'h', 'f' },
+ */
+ /* bytes */
+ { "uint8", "bytes", 8, 'b' },
+};
+
int riscv_cpu_gdb_read_register(CPUState *cs, GByteArray *mem_buf, int n)
{
RISCVCPU *cpu = RISCV_CPU(cs);
@@ -101,6 +127,96 @@ static int riscv_gdb_set_fpu(CPURISCVState *env, uint8_t *mem_buf, int n)
return 0;
}
+/*
+ * Convert register index number passed by GDB to the correspond
+ * vector CSR number. Vector CSRs are defined after vector registers
+ * in dynamic generated riscv-vector.xml, thus the starting register index
+ * of vector CSRs is 32.
+ * Return 0 if register index number is out of range.
+ */
+static int riscv_gdb_vector_csrno(int num_regs)
+{
+ /*
+ * The order of vector CSRs in the switch case
+ * should match with the order defined in csr_ops[].
+ */
+ switch (num_regs) {
+ case 32:
+ return CSR_VSTART;
+ case 33:
+ return CSR_VXSAT;
+ case 34:
+ return CSR_VXRM;
+ case 35:
+ return CSR_VCSR;
+ case 36:
+ return CSR_VL;
+ case 37:
+ return CSR_VTYPE;
+ case 38:
+ return CSR_VLENB;
+ default:
+ /* Unknown register. */
+ return 0;
+ }
+}
+
+static int riscv_gdb_get_vector(CPURISCVState *env, GByteArray *buf, int n)
+{
+ uint16_t vlenb = env_archcpu(env)->cfg.vlen >> 3;
+ if (n < 32) {
+ int i;
+ int cnt = 0;
+ for (i = 0; i < vlenb; i += 8) {
+ cnt += gdb_get_reg64(buf,
+ env->vreg[(n * vlenb + i) / 8]);
+ }
+ return cnt;
+ }
+
+ int csrno = riscv_gdb_vector_csrno(n);
+
+ if (!csrno) {
+ return 0;
+ }
+
+ target_ulong val = 0;
+ int result = riscv_csrrw_debug(env, csrno, &val, 0, 0);
+
+ if (result == 0) {
+ return gdb_get_regl(buf, val);
+ }
+
+ return 0;
+}
+
+static int riscv_gdb_set_vector(CPURISCVState *env, uint8_t *mem_buf, int n)
+{
+ uint16_t vlenb = env_archcpu(env)->cfg.vlen >> 3;
+ if (n < 32) {
+ int i;
+ for (i = 0; i < vlenb; i += 8) {
+ env->vreg[(n * vlenb + i) / 8] = ldq_p(mem_buf + i);
+ }
+ return vlenb;
+ }
+
+ int csrno = riscv_gdb_vector_csrno(n);
+
+ if (!csrno) {
+ return 0;
+ }
+
+ target_ulong val = ldtul_p(mem_buf);
+ int result = riscv_csrrw_debug(env, csrno, NULL, val, -1);
+
+ if (result == 0) {
+ return sizeof(target_ulong);
+ }
+
+ return 0;
+}
+
static int riscv_gdb_get_csr(CPURISCVState *env, GByteArray *buf, int n)
{
if (n < CSR_TABLE_SIZE) {
@@ -187,6 +303,68 @@ static int riscv_gen_dynamic_csr_xml(CPUState *cs, int base_reg)
return CSR_TABLE_SIZE;
}
+static int ricsv_gen_dynamic_vector_xml(CPUState *cs, int base_reg)
+{
+ RISCVCPU *cpu = RISCV_CPU(cs);
+ GString *s = g_string_new(NULL);
+ g_autoptr(GString) ts = g_string_new("");
+ int reg_width = cpu->cfg.vlen;
+ int num_regs = 0;
+ int i;
+
+ g_string_printf(s, "<?xml version=\"1.0\"?>");
+ g_string_append_printf(s, "<!DOCTYPE target SYSTEM \"gdb-target.dtd\">");
+ g_string_append_printf(s, "<feature name=\"org.gnu.gdb.riscv.vector\">");
+
+ /* First define types and totals in a whole VL */
+ for (i = 0; i < ARRAY_SIZE(vec_lanes); i++) {
+ int count = reg_width / vec_lanes[i].size;
+ g_string_printf(ts, "%s", vec_lanes[i].id);
+ g_string_append_printf(s,
+ "<vector id=\"%s\" type=\"%s\" count=\"%d\"/>",
+ ts->str, vec_lanes[i].gdb_type, count);
+ }
+
+ /* Define unions */
+ g_string_append_printf(s, "<union id=\"riscv_vector\">");
+ for (i = 0; i < ARRAY_SIZE(vec_lanes); i++) {
+ g_string_append_printf(s, "<field name=\"%c\" type=\"%s\"/>",
+ vec_lanes[i].suffix,
+ vec_lanes[i].id);
+ }
+ g_string_append(s, "</union>");
+
+ /* Define vector registers */
+ for (i = 0; i < 32; i++) {
+ g_string_append_printf(s,
+ "<reg name=\"v%d\" bitsize=\"%d\""
+ " regnum=\"%d\" group=\"vector\""
+ " type=\"riscv_vector\"/>",
+ i, reg_width, base_reg++);
+ num_regs++;
+ }
+
+ /* Define vector CSRs */
+ const char *vector_csrs[7] = {
+ "vstart", "vxsat", "vxrm", "vcsr",
+ "vl", "vtype", "vlenb"
+ };
+
+ for (i = 0; i < 7; i++) {
+ g_string_append_printf(s,
+ "<reg name=\"%s\" bitsize=\"%d\""
+ " regnum=\"%d\" group=\"vector\""
+ " type=\"int\"/>",
+ vector_csrs[i], TARGET_LONG_BITS, base_reg++);
+ num_regs++;
+ }
+
+ g_string_append_printf(s, "</feature>");
+
+ cpu->dyn_vreg_xml = g_string_free(s, false);
+ return num_regs;
+}
+
void riscv_cpu_register_gdb_regs_for_features(CPUState *cs)
{
RISCVCPU *cpu = RISCV_CPU(cs);
@@ -198,6 +376,12 @@ void riscv_cpu_register_gdb_regs_for_features(CPUState *cs)
gdb_register_coprocessor(cs, riscv_gdb_get_fpu, riscv_gdb_set_fpu,
36, "riscv-32bit-fpu.xml", 0);
}
+ if (env->misa & RVV) {
+ gdb_register_coprocessor(cs, riscv_gdb_get_vector, riscv_gdb_set_vector,
+ ricsv_gen_dynamic_vector_xml(cs,
+ cs->gdb_num_regs),
+ "riscv-vector.xml", 0);
+ }
#if defined(TARGET_RISCV32)
gdb_register_coprocessor(cs, riscv_gdb_get_virtual, riscv_gdb_set_virtual,
1, "riscv-32bit-virtual.xml", 0);
--
2.17.1
next prev parent reply other threads:[~2021-02-26 4:06 UTC|newest]
Thread overview: 76+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-26 3:17 [PATCH v7 00/75] support vector extension v1.0 frank.chang
2021-02-26 3:17 ` [PATCH v7 01/75] target/riscv: drop vector 0.7.1 and add 1.0 support frank.chang
2021-02-26 3:17 ` [PATCH v7 02/75] target/riscv: Use FIELD_EX32() to extract wd field frank.chang
2021-02-26 3:17 ` [PATCH v7 03/75] target/riscv: rvv-1.0: add mstatus VS field frank.chang
2021-02-26 3:17 ` [PATCH v7 04/75] target/riscv: rvv-1.0: add sstatus " frank.chang
2021-02-26 3:17 ` [PATCH v7 05/75] target/riscv: rvv-1.0: introduce writable misa.v field frank.chang
2021-02-26 3:17 ` [PATCH v7 06/75] target/riscv: rvv-1.0: add translation-time vector context status frank.chang
2021-02-26 3:17 ` [PATCH v7 07/75] target/riscv: rvv-1.0: remove rvv related codes from fcsr registers frank.chang
2021-02-26 3:17 ` [PATCH v7 08/75] target/riscv: rvv-1.0: add vcsr register frank.chang
2021-02-26 3:17 ` [PATCH v7 09/75] target/riscv: rvv-1.0: add vlenb register frank.chang
2021-02-26 3:17 ` [PATCH v7 10/75] target/riscv: rvv-1.0: check MSTATUS_VS when accessing vector csr registers frank.chang
2021-02-26 3:17 ` [PATCH v7 11/75] target/riscv: rvv-1.0: remove MLEN calculations frank.chang
2021-02-26 3:17 ` [PATCH v7 12/75] target/riscv: rvv-1.0: add fractional LMUL frank.chang
2021-02-26 3:17 ` [PATCH v7 13/75] target/riscv: rvv-1.0: add VMA and VTA frank.chang
2021-02-26 3:17 ` [PATCH v7 14/75] target/riscv: rvv-1.0: update check functions frank.chang
2021-02-26 3:17 ` [PATCH v7 15/75] target/riscv: introduce more imm value modes in translator functions frank.chang
2021-02-26 3:18 ` [PATCH v7 16/75] target/riscv: rvv:1.0: add translation-time nan-box helper function frank.chang
2021-02-26 3:18 ` [PATCH v7 17/75] target/riscv: rvv-1.0: configure instructions frank.chang
2021-02-26 3:18 ` [PATCH v7 18/75] target/riscv: rvv-1.0: stride load and store instructions frank.chang
2021-02-26 3:18 ` [PATCH v7 19/75] target/riscv: rvv-1.0: index " frank.chang
2021-02-26 3:18 ` [PATCH v7 20/75] target/riscv: rvv-1.0: fix address index overflow bug of indexed load/store insns frank.chang
2021-02-26 3:18 ` [PATCH v7 21/75] target/riscv: rvv-1.0: fault-only-first unit stride load frank.chang
2021-02-26 3:18 ` [PATCH v7 22/75] target/riscv: rvv-1.0: amo operations frank.chang
2021-02-26 3:18 ` [PATCH v7 23/75] target/riscv: rvv-1.0: load/store whole register instructions frank.chang
2021-02-26 3:18 ` [PATCH v7 24/75] target/riscv: rvv-1.0: update vext_max_elems() for load/store insns frank.chang
2021-02-26 3:18 ` [PATCH v7 25/75] target/riscv: rvv-1.0: take fractional LMUL into vector max elements calculation frank.chang
2021-02-26 3:18 ` [PATCH v7 26/75] target/riscv: rvv-1.0: floating-point square-root instruction frank.chang
2021-02-26 3:18 ` [PATCH v7 27/75] target/riscv: rvv-1.0: floating-point classify instructions frank.chang
2021-02-26 3:18 ` [PATCH v7 28/75] target/riscv: rvv-1.0: mask population count instruction frank.chang
2021-02-26 3:18 ` [PATCH v7 29/75] target/riscv: rvv-1.0: find-first-set mask bit instruction frank.chang
2021-02-26 3:18 ` [PATCH v7 30/75] target/riscv: rvv-1.0: set-X-first mask bit instructions frank.chang
2021-02-26 3:18 ` [PATCH v7 31/75] target/riscv: rvv-1.0: iota instruction frank.chang
2021-02-26 3:18 ` [PATCH v7 32/75] target/riscv: rvv-1.0: element index instruction frank.chang
2021-02-26 3:18 ` [PATCH v7 33/75] target/riscv: rvv-1.0: allow load element with sign-extended frank.chang
2021-02-26 3:18 ` [PATCH v7 34/75] target/riscv: rvv-1.0: register gather instructions frank.chang
2021-02-26 3:18 ` [PATCH v7 35/75] target/riscv: rvv-1.0: integer scalar move instructions frank.chang
2021-02-26 3:18 ` [PATCH v7 36/75] target/riscv: rvv-1.0: floating-point move instruction frank.chang
2021-02-26 3:18 ` [PATCH v7 37/75] target/riscv: rvv-1.0: floating-point scalar move instructions frank.chang
2021-02-26 3:18 ` [PATCH v7 38/75] target/riscv: rvv-1.0: whole register " frank.chang
2021-02-26 3:18 ` [PATCH v7 39/75] target/riscv: rvv-1.0: integer extension instructions frank.chang
2021-02-26 3:18 ` [PATCH v7 40/75] target/riscv: rvv-1.0: single-width averaging add and subtract instructions frank.chang
2021-02-26 3:18 ` [PATCH v7 41/75] target/riscv: rvv-1.0: single-width bit shift instructions frank.chang
2021-02-26 3:18 ` [PATCH v7 42/75] target/riscv: rvv-1.0: integer add-with-carry/subtract-with-borrow frank.chang
2021-02-26 3:18 ` [PATCH v7 43/75] target/riscv: rvv-1.0: narrowing integer right shift instructions frank.chang
2021-02-26 3:18 ` [PATCH v7 44/75] target/riscv: rvv-1.0: widening integer multiply-add instructions frank.chang
2021-02-26 3:18 ` [PATCH v7 45/75] target/riscv: rvv-1.0: single-width saturating add and subtract instructions frank.chang
2021-02-26 3:18 ` [PATCH v7 46/75] target/riscv: rvv-1.0: integer comparison instructions frank.chang
2021-02-26 3:18 ` [PATCH v7 47/75] target/riscv: rvv-1.0: floating-point compare instructions frank.chang
2021-02-26 3:18 ` [PATCH v7 48/75] target/riscv: rvv-1.0: mask-register logical instructions frank.chang
2021-02-26 3:18 ` [PATCH v7 49/75] target/riscv: rvv-1.0: slide instructions frank.chang
2021-02-26 3:18 ` [PATCH v7 50/75] target/riscv: rvv-1.0: floating-point " frank.chang
2021-02-26 3:18 ` [PATCH v7 51/75] target/riscv: rvv-1.0: narrowing fixed-point clip instructions frank.chang
2021-02-26 3:18 ` [PATCH v7 52/75] target/riscv: rvv-1.0: single-width floating-point reduction frank.chang
2021-02-26 3:18 ` [PATCH v7 53/75] target/riscv: rvv-1.0: widening floating-point reduction instructions frank.chang
2021-02-26 3:18 ` [PATCH v7 54/75] target/riscv: rvv-1.0: single-width scaling shift instructions frank.chang
2021-02-26 3:18 ` [PATCH v7 55/75] target/riscv: rvv-1.0: remove widening saturating scaled multiply-add frank.chang
2021-02-26 3:18 ` [PATCH v7 56/75] target/riscv: rvv-1.0: remove vmford.vv and vmford.vf frank.chang
2021-02-26 3:18 ` [PATCH v7 57/75] target/riscv: rvv-1.0: remove integer extract instruction frank.chang
2021-02-26 3:18 ` [PATCH v7 58/75] target/riscv: rvv-1.0: floating-point min/max instructions frank.chang
2021-02-26 3:18 ` [PATCH v7 59/75] target/riscv: introduce floating-point rounding mode enum frank.chang
2021-02-26 3:18 ` [PATCH v7 60/75] target/riscv: rvv-1.0: floating-point/integer type-convert instructions frank.chang
2021-02-26 3:18 ` [PATCH v7 61/75] target/riscv: rvv-1.0: widening floating-point/integer type-convert frank.chang
2021-02-26 3:18 ` [PATCH v7 62/75] target/riscv: add "set round to odd" rounding mode helper function frank.chang
2021-02-26 3:18 ` [PATCH v7 63/75] target/riscv: rvv-1.0: narrowing floating-point/integer type-convert frank.chang
2021-02-26 3:18 ` [PATCH v7 64/75] target/riscv: rvv-1.0: relax RV_VLEN_MAX to 1024-bits frank.chang
2021-02-26 3:18 ` [PATCH v7 65/75] target/riscv: rvv-1.0: implement vstart CSR frank.chang
2021-02-26 3:18 ` [PATCH v7 66/75] target/riscv: rvv-1.0: trigger illegal instruction exception if frm is not valid frank.chang
2021-02-26 3:18 ` [PATCH v7 67/75] target/riscv: rvv-1.0: set mstatus.SD bit when writing vector CSRs frank.chang
2021-02-26 3:18 ` frank.chang [this message]
2021-02-26 3:18 ` [PATCH v7 69/75] target/riscv: rvv-1.0: floating-point reciprocal square-root estimate instruction frank.chang
2021-02-26 3:18 ` [PATCH v7 70/75] target/riscv: rvv-1.0: floating-point reciprocal " frank.chang
2021-02-26 3:18 ` [PATCH v7 71/75] target/riscv: set mstatus.SD bit when writing fp CSRs frank.chang
2021-02-26 3:18 ` [PATCH v7 72/75] target/riscv: rvv-1.0: rename r2_zimm to r2_zimm11 frank.chang
2021-02-26 3:18 ` [PATCH v7 73/75] target/riscv: rvv-1.0: add vsetivli instruction frank.chang
2021-02-26 3:18 ` [PATCH v7 74/75] target/riscv: rvv-1.0: add evl parameter to vext_ldst_us() frank.chang
2021-02-26 3:18 ` [PATCH v7 75/75] target/riscv: rvv-1.0: add vector unit-stride mask load/store insns frank.chang
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=20210226031902.23656-69-frank.chang@sifive.com \
--to=frank.chang@sifive.com \
--cc=Alistair.Francis@wdc.com \
--cc=greentime.hu@sifive.com \
--cc=kai.wang@sifive.com \
--cc=kbastian@mail.uni-paderborn.de \
--cc=palmer@dabbelt.com \
--cc=qemu-devel@nongnu.org \
--cc=qemu-riscv@nongnu.org \
--cc=sagark@eecs.berkeley.edu \
/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
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
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).