* [PATCH v3 01/20] target/arm: Add commentary for CPUARMState.exclusive_high
2023-05-30 19:14 [PATCH v3 00/20] target/arm: Implement FEAT_LSE2 Richard Henderson
@ 2023-05-30 19:14 ` Richard Henderson
2023-05-30 19:14 ` [PATCH v3 02/20] target/arm: Add feature test for FEAT_LSE2 Richard Henderson
` (19 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Richard Henderson @ 2023-05-30 19:14 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
Document the meaning of exclusive_high in a big-endian context,
and why we can't change it now.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/cpu.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index d469a2637b..81c0df9c25 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -677,8 +677,16 @@ typedef struct CPUArchState {
uint64_t zcr_el[4]; /* ZCR_EL[1-3] */
uint64_t smcr_el[4]; /* SMCR_EL[1-3] */
} vfp;
+
uint64_t exclusive_addr;
uint64_t exclusive_val;
+ /*
+ * Contains the 'val' for the second 64-bit register of LDXP, which comes
+ * from the higher address, not the high part of a complete 128-bit value.
+ * In some ways it might be more convenient to record the exclusive value
+ * as the low and high halves of a 128 bit data value, but the current
+ * semantics of these fields are baked into the migration format.
+ */
uint64_t exclusive_high;
/* iwMMXt coprocessor state. */
--
2.34.1
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v3 02/20] target/arm: Add feature test for FEAT_LSE2
2023-05-30 19:14 [PATCH v3 00/20] target/arm: Implement FEAT_LSE2 Richard Henderson
2023-05-30 19:14 ` [PATCH v3 01/20] target/arm: Add commentary for CPUARMState.exclusive_high Richard Henderson
@ 2023-05-30 19:14 ` Richard Henderson
2023-05-30 19:14 ` [PATCH v3 03/20] target/arm: Introduce finalize_memop_{atom,pair} Richard Henderson
` (18 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Richard Henderson @ 2023-05-30 19:14 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Philippe Mathieu-Daudé, Peter Maydell
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/cpu.h | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index 81c0df9c25..c1db26b299 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -3851,6 +3851,11 @@ static inline bool isar_feature_aa64_st(const ARMISARegisters *id)
return FIELD_EX64(id->id_aa64mmfr2, ID_AA64MMFR2, ST) != 0;
}
+static inline bool isar_feature_aa64_lse2(const ARMISARegisters *id)
+{
+ return FIELD_EX64(id->id_aa64mmfr2, ID_AA64MMFR2, AT) != 0;
+}
+
static inline bool isar_feature_aa64_fwb(const ARMISARegisters *id)
{
return FIELD_EX64(id->id_aa64mmfr2, ID_AA64MMFR2, FWB) != 0;
--
2.34.1
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v3 03/20] target/arm: Introduce finalize_memop_{atom,pair}
2023-05-30 19:14 [PATCH v3 00/20] target/arm: Implement FEAT_LSE2 Richard Henderson
2023-05-30 19:14 ` [PATCH v3 01/20] target/arm: Add commentary for CPUARMState.exclusive_high Richard Henderson
2023-05-30 19:14 ` [PATCH v3 02/20] target/arm: Add feature test for FEAT_LSE2 Richard Henderson
@ 2023-05-30 19:14 ` Richard Henderson
2023-05-30 19:14 ` [PATCH v3 04/20] target/arm: Use tcg_gen_qemu_ld_i128 for LDXP Richard Henderson
` (17 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Richard Henderson @ 2023-05-30 19:14 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Philippe Mathieu-Daudé, Peter Maydell
Let finalize_memop_atom be the new basic function, with
finalize_memop and finalize_memop_pair testing FEAT_LSE2
to apply the appropriate atomicity.
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/tcg/translate.h | 39 +++++++++++++++++++++++++++++-----
target/arm/tcg/translate-a64.c | 2 ++
target/arm/tcg/translate.c | 1 +
3 files changed, 37 insertions(+), 5 deletions(-)
diff --git a/target/arm/tcg/translate.h b/target/arm/tcg/translate.h
index a9d1f4adc2..9a33076c3d 100644
--- a/target/arm/tcg/translate.h
+++ b/target/arm/tcg/translate.h
@@ -85,6 +85,7 @@ typedef struct DisasContext {
uint64_t features; /* CPU features bits */
bool aarch64;
bool thumb;
+ bool lse2;
/* Because unallocated encodings generate different exception syndrome
* information from traps due to FP being disabled, we can't do a single
* "is fp access disabled" check at a high level in the decode tree.
@@ -552,12 +553,13 @@ static inline TCGv_ptr fpstatus_ptr(ARMFPStatusFlavour flavour)
}
/**
- * finalize_memop:
+ * finalize_memop_atom:
* @s: DisasContext
* @opc: size+sign+align of the memory operation
+ * @atom: atomicity of the memory operation
*
- * Build the complete MemOp for a memory operation, including alignment
- * and endianness.
+ * Build the complete MemOp for a memory operation, including alignment,
+ * endianness, and atomicity.
*
* If (op & MO_AMASK) then the operation already contains the required
* alignment, e.g. for AccType_ATOMIC. Otherwise, this an optionally
@@ -567,12 +569,39 @@ static inline TCGv_ptr fpstatus_ptr(ARMFPStatusFlavour flavour)
* and this is applied here. Note that there is no way to indicate that
* no alignment should ever be enforced; this must be handled manually.
*/
-static inline MemOp finalize_memop(DisasContext *s, MemOp opc)
+static inline MemOp finalize_memop_atom(DisasContext *s, MemOp opc, MemOp atom)
{
if (s->align_mem && !(opc & MO_AMASK)) {
opc |= MO_ALIGN;
}
- return opc | s->be_data;
+ return opc | atom | s->be_data;
+}
+
+/**
+ * finalize_memop:
+ * @s: DisasContext
+ * @opc: size+sign+align of the memory operation
+ *
+ * Like finalize_memop_atom, but with default atomicity.
+ */
+static inline MemOp finalize_memop(DisasContext *s, MemOp opc)
+{
+ MemOp atom = s->lse2 ? MO_ATOM_WITHIN16 : MO_ATOM_IFALIGN;
+ return finalize_memop_atom(s, opc, atom);
+}
+
+/**
+ * finalize_memop_pair:
+ * @s: DisasContext
+ * @opc: size+sign+align of the memory operation
+ *
+ * Like finalize_memop_atom, but with atomicity for a pair.
+ * C.f. Pseudocode for Mem[], operand ispair.
+ */
+static inline MemOp finalize_memop_pair(DisasContext *s, MemOp opc)
+{
+ MemOp atom = s->lse2 ? MO_ATOM_WITHIN16_PAIR : MO_ATOM_IFALIGN_PAIR;
+ return finalize_memop_atom(s, opc, atom);
}
/**
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 741a608739..967400ed68 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -14110,6 +14110,8 @@ static void aarch64_tr_init_disas_context(DisasContextBase *dcbase,
tcg_debug_assert(dc->tbid & 1);
#endif
+ dc->lse2 = dc_isar_feature(aa64_lse2, dc);
+
/* Single step state. The code-generation logic here is:
* SS_ACTIVE == 0:
* generate code with no special handling for single-stepping (except
diff --git a/target/arm/tcg/translate.c b/target/arm/tcg/translate.c
index 7468476724..7a6a8029e5 100644
--- a/target/arm/tcg/translate.c
+++ b/target/arm/tcg/translate.c
@@ -9183,6 +9183,7 @@ static void arm_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cs)
dc->sme_trap_nonstreaming =
EX_TBFLAG_A32(tb_flags, SME_TRAP_NONSTREAMING);
}
+ dc->lse2 = false; /* applies only to aarch64 */
dc->cp_regs = cpu->cp_regs;
dc->features = env->features;
--
2.34.1
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v3 04/20] target/arm: Use tcg_gen_qemu_ld_i128 for LDXP
2023-05-30 19:14 [PATCH v3 00/20] target/arm: Implement FEAT_LSE2 Richard Henderson
` (2 preceding siblings ...)
2023-05-30 19:14 ` [PATCH v3 03/20] target/arm: Introduce finalize_memop_{atom,pair} Richard Henderson
@ 2023-05-30 19:14 ` Richard Henderson
2023-05-30 19:14 ` [PATCH v3 05/20] target/arm: Use tcg_gen_qemu_{st, ld}_i128 for do_fp_{st, ld} Richard Henderson
` (16 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Richard Henderson @ 2023-05-30 19:14 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
While we don't require 16-byte atomicity here, using a single larger
load simplifies the code, and makes it a closer match to STXP.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/tcg/translate-a64.c | 31 ++++++++++++++++++++-----------
1 file changed, 20 insertions(+), 11 deletions(-)
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 967400ed68..0e720f2612 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -2398,14 +2398,14 @@ static void gen_load_exclusive(DisasContext *s, int rt, int rt2,
TCGv_i64 addr, int size, bool is_pair)
{
int idx = get_mem_index(s);
- MemOp memop = s->be_data;
+ MemOp memop;
g_assert(size <= 3);
if (is_pair) {
g_assert(size >= 2);
if (size == 2) {
/* The pair must be single-copy atomic for the doubleword. */
- memop |= MO_64 | MO_ALIGN;
+ memop = finalize_memop(s, MO_64 | MO_ALIGN);
tcg_gen_qemu_ld_i64(cpu_exclusive_val, addr, idx, memop);
if (s->be_data == MO_LE) {
tcg_gen_extract_i64(cpu_reg(s, rt), cpu_exclusive_val, 0, 32);
@@ -2415,21 +2415,30 @@ static void gen_load_exclusive(DisasContext *s, int rt, int rt2,
tcg_gen_extract_i64(cpu_reg(s, rt2), cpu_exclusive_val, 0, 32);
}
} else {
- /* The pair must be single-copy atomic for *each* doubleword, not
- the entire quadword, however it must be quadword aligned. */
- memop |= MO_64;
- tcg_gen_qemu_ld_i64(cpu_exclusive_val, addr, idx,
- memop | MO_ALIGN_16);
+ /*
+ * The pair must be single-copy atomic for *each* doubleword, not
+ * the entire quadword, however it must be quadword aligned.
+ * Expose the complete load to tcg, for ease of tlb lookup,
+ * but indicate that only 8-byte atomicity is required.
+ */
+ TCGv_i128 t16 = tcg_temp_new_i128();
- TCGv_i64 addr2 = tcg_temp_new_i64();
- tcg_gen_addi_i64(addr2, addr, 8);
- tcg_gen_qemu_ld_i64(cpu_exclusive_high, addr2, idx, memop);
+ memop = finalize_memop_atom(s, MO_128 | MO_ALIGN_16,
+ MO_ATOM_IFALIGN_PAIR);
+ tcg_gen_qemu_ld_i128(t16, addr, idx, memop);
+ if (s->be_data == MO_LE) {
+ tcg_gen_extr_i128_i64(cpu_exclusive_val,
+ cpu_exclusive_high, t16);
+ } else {
+ tcg_gen_extr_i128_i64(cpu_exclusive_high,
+ cpu_exclusive_val, t16);
+ }
tcg_gen_mov_i64(cpu_reg(s, rt), cpu_exclusive_val);
tcg_gen_mov_i64(cpu_reg(s, rt2), cpu_exclusive_high);
}
} else {
- memop |= size | MO_ALIGN;
+ memop = finalize_memop(s, size | MO_ALIGN);
tcg_gen_qemu_ld_i64(cpu_exclusive_val, addr, idx, memop);
tcg_gen_mov_i64(cpu_reg(s, rt), cpu_exclusive_val);
}
--
2.34.1
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v3 05/20] target/arm: Use tcg_gen_qemu_{st, ld}_i128 for do_fp_{st, ld}
2023-05-30 19:14 [PATCH v3 00/20] target/arm: Implement FEAT_LSE2 Richard Henderson
` (3 preceding siblings ...)
2023-05-30 19:14 ` [PATCH v3 04/20] target/arm: Use tcg_gen_qemu_ld_i128 for LDXP Richard Henderson
@ 2023-05-30 19:14 ` Richard Henderson
2023-05-30 19:14 ` [PATCH v3 06/20] target/arm: Use tcg_gen_qemu_st_i128 for STZG, STZ2G Richard Henderson
` (15 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Richard Henderson @ 2023-05-30 19:14 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
While we don't require 16-byte atomicity here, using a single larger
operation simplifies the code. Introduce finalize_memop_asimd for this.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/tcg/translate.h | 24 +++++++++++++++++++++++
target/arm/tcg/translate-a64.c | 35 +++++++++++-----------------------
2 files changed, 35 insertions(+), 24 deletions(-)
diff --git a/target/arm/tcg/translate.h b/target/arm/tcg/translate.h
index 9a33076c3d..626cf07970 100644
--- a/target/arm/tcg/translate.h
+++ b/target/arm/tcg/translate.h
@@ -604,6 +604,30 @@ static inline MemOp finalize_memop_pair(DisasContext *s, MemOp opc)
return finalize_memop_atom(s, opc, atom);
}
+/**
+ * finalize_memop_asimd:
+ * @s: DisasContext
+ * @opc: size+sign+align of the memory operation
+ *
+ * Like finalize_memop_atom, but with atomicity of AccessType_ASIMD.
+ */
+static inline MemOp finalize_memop_asimd(DisasContext *s, MemOp opc)
+{
+ /*
+ * In the pseudocode for Mem[], with AccessType_ASIMD, size == 16,
+ * if IsAligned(8), the first case provides separate atomicity for
+ * the pair of 64-bit accesses. If !IsAligned(8), the middle cases
+ * do not apply, and we're left with the final case of no atomicity.
+ * Thus MO_ATOM_IFALIGN_PAIR.
+ *
+ * For other sizes, normal LSE2 rules apply.
+ */
+ if ((opc & MO_SIZE) == MO_128) {
+ return finalize_memop_atom(s, opc, MO_ATOM_IFALIGN_PAIR);
+ }
+ return finalize_memop(s, opc);
+}
+
/**
* asimd_imm_const: Expand an encoded SIMD constant value
*
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 0e720f2612..6bb68618a0 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -921,26 +921,20 @@ static void do_fp_st(DisasContext *s, int srcidx, TCGv_i64 tcg_addr, int size)
{
/* This writes the bottom N bits of a 128 bit wide vector to memory */
TCGv_i64 tmplo = tcg_temp_new_i64();
- MemOp mop;
+ MemOp mop = finalize_memop_asimd(s, size);
tcg_gen_ld_i64(tmplo, cpu_env, fp_reg_offset(s, srcidx, MO_64));
- if (size < 4) {
- mop = finalize_memop(s, size);
+ if (size < MO_128) {
tcg_gen_qemu_st_i64(tmplo, tcg_addr, get_mem_index(s), mop);
} else {
- bool be = s->be_data == MO_BE;
- TCGv_i64 tcg_hiaddr = tcg_temp_new_i64();
TCGv_i64 tmphi = tcg_temp_new_i64();
+ TCGv_i128 t16 = tcg_temp_new_i128();
tcg_gen_ld_i64(tmphi, cpu_env, fp_reg_hi_offset(s, srcidx));
+ tcg_gen_concat_i64_i128(t16, tmplo, tmphi);
- mop = s->be_data | MO_UQ;
- tcg_gen_qemu_st_i64(be ? tmphi : tmplo, tcg_addr, get_mem_index(s),
- mop | (s->align_mem ? MO_ALIGN_16 : 0));
- tcg_gen_addi_i64(tcg_hiaddr, tcg_addr, 8);
- tcg_gen_qemu_st_i64(be ? tmplo : tmphi, tcg_hiaddr,
- get_mem_index(s), mop);
+ tcg_gen_qemu_st_i128(t16, tcg_addr, get_mem_index(s), mop);
}
}
@@ -952,24 +946,17 @@ static void do_fp_ld(DisasContext *s, int destidx, TCGv_i64 tcg_addr, int size)
/* This always zero-extends and writes to a full 128 bit wide vector */
TCGv_i64 tmplo = tcg_temp_new_i64();
TCGv_i64 tmphi = NULL;
- MemOp mop;
+ MemOp mop = finalize_memop_asimd(s, size);
- if (size < 4) {
- mop = finalize_memop(s, size);
+ if (size < MO_128) {
tcg_gen_qemu_ld_i64(tmplo, tcg_addr, get_mem_index(s), mop);
} else {
- bool be = s->be_data == MO_BE;
- TCGv_i64 tcg_hiaddr;
+ TCGv_i128 t16 = tcg_temp_new_i128();
+
+ tcg_gen_qemu_ld_i128(t16, tcg_addr, get_mem_index(s), mop);
tmphi = tcg_temp_new_i64();
- tcg_hiaddr = tcg_temp_new_i64();
-
- mop = s->be_data | MO_UQ;
- tcg_gen_qemu_ld_i64(be ? tmphi : tmplo, tcg_addr, get_mem_index(s),
- mop | (s->align_mem ? MO_ALIGN_16 : 0));
- tcg_gen_addi_i64(tcg_hiaddr, tcg_addr, 8);
- tcg_gen_qemu_ld_i64(be ? tmplo : tmphi, tcg_hiaddr,
- get_mem_index(s), mop);
+ tcg_gen_extr_i128_i64(tmplo, tmphi, t16);
}
tcg_gen_st_i64(tmplo, cpu_env, fp_reg_offset(s, destidx, MO_64));
--
2.34.1
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v3 06/20] target/arm: Use tcg_gen_qemu_st_i128 for STZG, STZ2G
2023-05-30 19:14 [PATCH v3 00/20] target/arm: Implement FEAT_LSE2 Richard Henderson
` (4 preceding siblings ...)
2023-05-30 19:14 ` [PATCH v3 05/20] target/arm: Use tcg_gen_qemu_{st, ld}_i128 for do_fp_{st, ld} Richard Henderson
@ 2023-05-30 19:14 ` Richard Henderson
2023-05-30 19:14 ` [PATCH v3 07/20] target/arm: Use tcg_gen_qemu_{ld, st}_i128 in gen_sve_{ld, st}r Richard Henderson
` (14 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Richard Henderson @ 2023-05-30 19:14 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
This fixes a bug in that these two insns should have been using atomic
16-byte stores, since MTE is ARMv8.5 and LSE2 is mandatory from ARMv8.4.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/tcg/translate-a64.c | 17 ++++++++++-------
1 file changed, 10 insertions(+), 7 deletions(-)
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 6bb68618a0..51f9d227e7 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -4070,15 +4070,18 @@ static void disas_ldst_tag(DisasContext *s, uint32_t insn)
if (is_zero) {
TCGv_i64 clean_addr = clean_data_tbi(s, addr);
- TCGv_i64 tcg_zero = tcg_constant_i64(0);
+ TCGv_i64 zero64 = tcg_constant_i64(0);
+ TCGv_i128 zero128 = tcg_temp_new_i128();
int mem_index = get_mem_index(s);
- int i, n = (1 + is_pair) << LOG2_TAG_GRANULE;
+ MemOp mop = finalize_memop(s, MO_128 | MO_ALIGN);
- tcg_gen_qemu_st_i64(tcg_zero, clean_addr, mem_index,
- MO_UQ | MO_ALIGN_16);
- for (i = 8; i < n; i += 8) {
- tcg_gen_addi_i64(clean_addr, clean_addr, 8);
- tcg_gen_qemu_st_i64(tcg_zero, clean_addr, mem_index, MO_UQ);
+ tcg_gen_concat_i64_i128(zero128, zero64, zero64);
+
+ /* This is 1 or 2 atomic 16-byte operations. */
+ tcg_gen_qemu_st_i128(zero128, clean_addr, mem_index, mop);
+ if (is_pair) {
+ tcg_gen_addi_i64(clean_addr, clean_addr, 16);
+ tcg_gen_qemu_st_i128(zero128, clean_addr, mem_index, mop);
}
}
--
2.34.1
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v3 07/20] target/arm: Use tcg_gen_qemu_{ld, st}_i128 in gen_sve_{ld, st}r
2023-05-30 19:14 [PATCH v3 00/20] target/arm: Implement FEAT_LSE2 Richard Henderson
` (5 preceding siblings ...)
2023-05-30 19:14 ` [PATCH v3 06/20] target/arm: Use tcg_gen_qemu_st_i128 for STZG, STZ2G Richard Henderson
@ 2023-05-30 19:14 ` Richard Henderson
2023-05-30 19:14 ` [PATCH v3 08/20] target/arm: Sink gen_mte_check1 into load/store_exclusive Richard Henderson
` (13 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Richard Henderson @ 2023-05-30 19:14 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
Round len_align to 16 instead of 8, handling an odd 8-byte as part
of the tail. Use MO_ATOM_NONE to indicate that all of these memory
ops have only byte atomicity.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/tcg/translate-sve.c | 95 +++++++++++++++++++++++++---------
1 file changed, 70 insertions(+), 25 deletions(-)
diff --git a/target/arm/tcg/translate-sve.c b/target/arm/tcg/translate-sve.c
index 92ab290106..058f7ef237 100644
--- a/target/arm/tcg/translate-sve.c
+++ b/target/arm/tcg/translate-sve.c
@@ -4178,11 +4178,12 @@ TRANS_FEAT(UCVTF_dd, aa64_sve, gen_gvec_fpst_arg_zpz,
void gen_sve_ldr(DisasContext *s, TCGv_ptr base, int vofs,
int len, int rn, int imm)
{
- int len_align = QEMU_ALIGN_DOWN(len, 8);
- int len_remain = len % 8;
- int nparts = len / 8 + ctpop8(len_remain);
+ int len_align = QEMU_ALIGN_DOWN(len, 16);
+ int len_remain = len % 16;
+ int nparts = len / 16 + ctpop8(len_remain);
int midx = get_mem_index(s);
TCGv_i64 dirty_addr, clean_addr, t0, t1;
+ TCGv_i128 t16;
dirty_addr = tcg_temp_new_i64();
tcg_gen_addi_i64(dirty_addr, cpu_reg_sp(s, rn), imm);
@@ -4199,10 +4200,16 @@ void gen_sve_ldr(DisasContext *s, TCGv_ptr base, int vofs,
int i;
t0 = tcg_temp_new_i64();
- for (i = 0; i < len_align; i += 8) {
- tcg_gen_qemu_ld_i64(t0, clean_addr, midx, MO_LEUQ);
+ t1 = tcg_temp_new_i64();
+ t16 = tcg_temp_new_i128();
+
+ for (i = 0; i < len_align; i += 16) {
+ tcg_gen_qemu_ld_i128(t16, clean_addr, midx,
+ MO_LE | MO_128 | MO_ATOM_NONE);
+ tcg_gen_extr_i128_i64(t0, t1, t16);
tcg_gen_st_i64(t0, base, vofs + i);
- tcg_gen_addi_i64(clean_addr, clean_addr, 8);
+ tcg_gen_st_i64(t1, base, vofs + i + 8);
+ tcg_gen_addi_i64(clean_addr, clean_addr, 16);
}
} else {
TCGLabel *loop = gen_new_label();
@@ -4211,14 +4218,21 @@ void gen_sve_ldr(DisasContext *s, TCGv_ptr base, int vofs,
tcg_gen_movi_ptr(i, 0);
gen_set_label(loop);
- t0 = tcg_temp_new_i64();
- tcg_gen_qemu_ld_i64(t0, clean_addr, midx, MO_LEUQ);
- tcg_gen_addi_i64(clean_addr, clean_addr, 8);
+ t16 = tcg_temp_new_i128();
+ tcg_gen_qemu_ld_i128(t16, clean_addr, midx,
+ MO_LE | MO_128 | MO_ATOM_NONE);
+ tcg_gen_addi_i64(clean_addr, clean_addr, 16);
tp = tcg_temp_new_ptr();
tcg_gen_add_ptr(tp, base, i);
- tcg_gen_addi_ptr(i, i, 8);
+ tcg_gen_addi_ptr(i, i, 16);
+
+ t0 = tcg_temp_new_i64();
+ t1 = tcg_temp_new_i64();
+ tcg_gen_extr_i128_i64(t0, t1, t16);
+
tcg_gen_st_i64(t0, tp, vofs);
+ tcg_gen_st_i64(t1, tp, vofs + 8);
tcg_gen_brcondi_ptr(TCG_COND_LTU, i, len_align, loop);
}
@@ -4227,6 +4241,16 @@ void gen_sve_ldr(DisasContext *s, TCGv_ptr base, int vofs,
* Predicate register loads can be any multiple of 2.
* Note that we still store the entire 64-bit unit into cpu_env.
*/
+ if (len_remain >= 8) {
+ t0 = tcg_temp_new_i64();
+ tcg_gen_qemu_ld_i64(t0, clean_addr, midx, MO_LEUQ | MO_ATOM_NONE);
+ tcg_gen_st_i64(t0, base, vofs + len_align);
+ len_remain -= 8;
+ len_align += 8;
+ if (len_remain) {
+ tcg_gen_addi_i64(clean_addr, clean_addr, 8);
+ }
+ }
if (len_remain) {
t0 = tcg_temp_new_i64();
switch (len_remain) {
@@ -4234,14 +4258,14 @@ void gen_sve_ldr(DisasContext *s, TCGv_ptr base, int vofs,
case 4:
case 8:
tcg_gen_qemu_ld_i64(t0, clean_addr, midx,
- MO_LE | ctz32(len_remain));
+ MO_LE | ctz32(len_remain) | MO_ATOM_NONE);
break;
case 6:
t1 = tcg_temp_new_i64();
- tcg_gen_qemu_ld_i64(t0, clean_addr, midx, MO_LEUL);
+ tcg_gen_qemu_ld_i64(t0, clean_addr, midx, MO_LEUL | MO_ATOM_NONE);
tcg_gen_addi_i64(clean_addr, clean_addr, 4);
- tcg_gen_qemu_ld_i64(t1, clean_addr, midx, MO_LEUW);
+ tcg_gen_qemu_ld_i64(t1, clean_addr, midx, MO_LEUW | MO_ATOM_NONE);
tcg_gen_deposit_i64(t0, t0, t1, 32, 32);
break;
@@ -4256,11 +4280,12 @@ void gen_sve_ldr(DisasContext *s, TCGv_ptr base, int vofs,
void gen_sve_str(DisasContext *s, TCGv_ptr base, int vofs,
int len, int rn, int imm)
{
- int len_align = QEMU_ALIGN_DOWN(len, 8);
- int len_remain = len % 8;
- int nparts = len / 8 + ctpop8(len_remain);
+ int len_align = QEMU_ALIGN_DOWN(len, 16);
+ int len_remain = len % 16;
+ int nparts = len / 16 + ctpop8(len_remain);
int midx = get_mem_index(s);
- TCGv_i64 dirty_addr, clean_addr, t0;
+ TCGv_i64 dirty_addr, clean_addr, t0, t1;
+ TCGv_i128 t16;
dirty_addr = tcg_temp_new_i64();
tcg_gen_addi_i64(dirty_addr, cpu_reg_sp(s, rn), imm);
@@ -4278,10 +4303,15 @@ void gen_sve_str(DisasContext *s, TCGv_ptr base, int vofs,
int i;
t0 = tcg_temp_new_i64();
+ t1 = tcg_temp_new_i64();
+ t16 = tcg_temp_new_i128();
for (i = 0; i < len_align; i += 8) {
tcg_gen_ld_i64(t0, base, vofs + i);
- tcg_gen_qemu_st_i64(t0, clean_addr, midx, MO_LEUQ);
- tcg_gen_addi_i64(clean_addr, clean_addr, 8);
+ tcg_gen_ld_i64(t1, base, vofs + i + 8);
+ tcg_gen_concat_i64_i128(t16, t0, t1);
+ tcg_gen_qemu_st_i128(t16, clean_addr, midx,
+ MO_LE | MO_128 | MO_ATOM_NONE);
+ tcg_gen_addi_i64(clean_addr, clean_addr, 16);
}
} else {
TCGLabel *loop = gen_new_label();
@@ -4291,18 +4321,33 @@ void gen_sve_str(DisasContext *s, TCGv_ptr base, int vofs,
gen_set_label(loop);
t0 = tcg_temp_new_i64();
+ t1 = tcg_temp_new_i64();
tp = tcg_temp_new_ptr();
tcg_gen_add_ptr(tp, base, i);
tcg_gen_ld_i64(t0, tp, vofs);
- tcg_gen_addi_ptr(i, i, 8);
+ tcg_gen_ld_i64(t1, tp, vofs + 8);
+ tcg_gen_addi_ptr(i, i, 16);
- tcg_gen_qemu_st_i64(t0, clean_addr, midx, MO_LEUQ);
- tcg_gen_addi_i64(clean_addr, clean_addr, 8);
+ t16 = tcg_temp_new_i128();
+ tcg_gen_concat_i64_i128(t16, t0, t1);
+
+ tcg_gen_qemu_st_i128(t16, clean_addr, midx, MO_LEUQ);
+ tcg_gen_addi_i64(clean_addr, clean_addr, 16);
tcg_gen_brcondi_ptr(TCG_COND_LTU, i, len_align, loop);
}
/* Predicate register stores can be any multiple of 2. */
+ if (len_remain >= 8) {
+ t0 = tcg_temp_new_i64();
+ tcg_gen_st_i64(t0, base, vofs + len_align);
+ tcg_gen_qemu_st_i64(t0, clean_addr, midx, MO_LEUQ | MO_ATOM_NONE);
+ len_remain -= 8;
+ len_align += 8;
+ if (len_remain) {
+ tcg_gen_addi_i64(clean_addr, clean_addr, 8);
+ }
+ }
if (len_remain) {
t0 = tcg_temp_new_i64();
tcg_gen_ld_i64(t0, base, vofs + len_align);
@@ -4312,14 +4357,14 @@ void gen_sve_str(DisasContext *s, TCGv_ptr base, int vofs,
case 4:
case 8:
tcg_gen_qemu_st_i64(t0, clean_addr, midx,
- MO_LE | ctz32(len_remain));
+ MO_LE | ctz32(len_remain) | MO_ATOM_NONE);
break;
case 6:
- tcg_gen_qemu_st_i64(t0, clean_addr, midx, MO_LEUL);
+ tcg_gen_qemu_st_i64(t0, clean_addr, midx, MO_LEUL | MO_ATOM_NONE);
tcg_gen_addi_i64(clean_addr, clean_addr, 4);
tcg_gen_shri_i64(t0, t0, 32);
- tcg_gen_qemu_st_i64(t0, clean_addr, midx, MO_LEUW);
+ tcg_gen_qemu_st_i64(t0, clean_addr, midx, MO_LEUW | MO_ATOM_NONE);
break;
default:
--
2.34.1
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v3 08/20] target/arm: Sink gen_mte_check1 into load/store_exclusive
2023-05-30 19:14 [PATCH v3 00/20] target/arm: Implement FEAT_LSE2 Richard Henderson
` (6 preceding siblings ...)
2023-05-30 19:14 ` [PATCH v3 07/20] target/arm: Use tcg_gen_qemu_{ld, st}_i128 in gen_sve_{ld, st}r Richard Henderson
@ 2023-05-30 19:14 ` Richard Henderson
2023-05-30 19:14 ` [PATCH v3 09/20] target/arm: Load/store integer pair with one tcg operation Richard Henderson
` (12 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Richard Henderson @ 2023-05-30 19:14 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
No need to duplicate this check across multiple call sites.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/tcg/translate-a64.c | 44 ++++++++++++++++------------------
1 file changed, 21 insertions(+), 23 deletions(-)
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 51f9d227e7..19f0f20896 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -2381,11 +2381,16 @@ static void disas_b_exc_sys(DisasContext *s, uint32_t insn)
* races in multi-threaded linux-user and when MTTCG softmmu is
* enabled.
*/
-static void gen_load_exclusive(DisasContext *s, int rt, int rt2,
- TCGv_i64 addr, int size, bool is_pair)
+static void gen_load_exclusive(DisasContext *s, int rt, int rt2, int rn,
+ int size, bool is_pair)
{
int idx = get_mem_index(s);
MemOp memop;
+ TCGv_i64 dirty_addr, clean_addr;
+
+ s->is_ldex = true;
+ dirty_addr = cpu_reg_sp(s, rn);
+ clean_addr = gen_mte_check1(s, dirty_addr, false, rn != 31, size);
g_assert(size <= 3);
if (is_pair) {
@@ -2393,7 +2398,7 @@ static void gen_load_exclusive(DisasContext *s, int rt, int rt2,
if (size == 2) {
/* The pair must be single-copy atomic for the doubleword. */
memop = finalize_memop(s, MO_64 | MO_ALIGN);
- tcg_gen_qemu_ld_i64(cpu_exclusive_val, addr, idx, memop);
+ tcg_gen_qemu_ld_i64(cpu_exclusive_val, clean_addr, idx, memop);
if (s->be_data == MO_LE) {
tcg_gen_extract_i64(cpu_reg(s, rt), cpu_exclusive_val, 0, 32);
tcg_gen_extract_i64(cpu_reg(s, rt2), cpu_exclusive_val, 32, 32);
@@ -2412,7 +2417,7 @@ static void gen_load_exclusive(DisasContext *s, int rt, int rt2,
memop = finalize_memop_atom(s, MO_128 | MO_ALIGN_16,
MO_ATOM_IFALIGN_PAIR);
- tcg_gen_qemu_ld_i128(t16, addr, idx, memop);
+ tcg_gen_qemu_ld_i128(t16, clean_addr, idx, memop);
if (s->be_data == MO_LE) {
tcg_gen_extr_i128_i64(cpu_exclusive_val,
@@ -2426,14 +2431,14 @@ static void gen_load_exclusive(DisasContext *s, int rt, int rt2,
}
} else {
memop = finalize_memop(s, size | MO_ALIGN);
- tcg_gen_qemu_ld_i64(cpu_exclusive_val, addr, idx, memop);
+ tcg_gen_qemu_ld_i64(cpu_exclusive_val, clean_addr, idx, memop);
tcg_gen_mov_i64(cpu_reg(s, rt), cpu_exclusive_val);
}
- tcg_gen_mov_i64(cpu_exclusive_addr, addr);
+ tcg_gen_mov_i64(cpu_exclusive_addr, clean_addr);
}
static void gen_store_exclusive(DisasContext *s, int rd, int rt, int rt2,
- TCGv_i64 addr, int size, int is_pair)
+ int rn, int size, int is_pair)
{
/* if (env->exclusive_addr == addr && env->exclusive_val == [addr]
* && (!is_pair || env->exclusive_high == [addr + datasize])) {
@@ -2449,9 +2454,12 @@ static void gen_store_exclusive(DisasContext *s, int rd, int rt, int rt2,
*/
TCGLabel *fail_label = gen_new_label();
TCGLabel *done_label = gen_new_label();
- TCGv_i64 tmp;
+ TCGv_i64 tmp, dirty_addr, clean_addr;
- tcg_gen_brcond_i64(TCG_COND_NE, addr, cpu_exclusive_addr, fail_label);
+ dirty_addr = cpu_reg_sp(s, rn);
+ clean_addr = gen_mte_check1(s, dirty_addr, true, rn != 31, size);
+
+ tcg_gen_brcond_i64(TCG_COND_NE, clean_addr, cpu_exclusive_addr, fail_label);
tmp = tcg_temp_new_i64();
if (is_pair) {
@@ -2639,9 +2647,7 @@ static void disas_ldst_excl(DisasContext *s, uint32_t insn)
if (is_lasr) {
tcg_gen_mb(TCG_MO_ALL | TCG_BAR_STRL);
}
- clean_addr = gen_mte_check1(s, cpu_reg_sp(s, rn),
- true, rn != 31, size);
- gen_store_exclusive(s, rs, rt, rt2, clean_addr, size, false);
+ gen_store_exclusive(s, rs, rt, rt2, rn, size, false);
return;
case 0x4: /* LDXR */
@@ -2649,10 +2655,7 @@ static void disas_ldst_excl(DisasContext *s, uint32_t insn)
if (rn == 31) {
gen_check_sp_alignment(s);
}
- clean_addr = gen_mte_check1(s, cpu_reg_sp(s, rn),
- false, rn != 31, size);
- s->is_ldex = true;
- gen_load_exclusive(s, rt, rt2, clean_addr, size, false);
+ gen_load_exclusive(s, rt, rt2, rn, size, false);
if (is_lasr) {
tcg_gen_mb(TCG_MO_ALL | TCG_BAR_LDAQ);
}
@@ -2704,9 +2707,7 @@ static void disas_ldst_excl(DisasContext *s, uint32_t insn)
if (is_lasr) {
tcg_gen_mb(TCG_MO_ALL | TCG_BAR_STRL);
}
- clean_addr = gen_mte_check1(s, cpu_reg_sp(s, rn),
- true, rn != 31, size);
- gen_store_exclusive(s, rs, rt, rt2, clean_addr, size, true);
+ gen_store_exclusive(s, rs, rt, rt2, rn, size, true);
return;
}
if (rt2 == 31
@@ -2723,10 +2724,7 @@ static void disas_ldst_excl(DisasContext *s, uint32_t insn)
if (rn == 31) {
gen_check_sp_alignment(s);
}
- clean_addr = gen_mte_check1(s, cpu_reg_sp(s, rn),
- false, rn != 31, size);
- s->is_ldex = true;
- gen_load_exclusive(s, rt, rt2, clean_addr, size, true);
+ gen_load_exclusive(s, rt, rt2, rn, size, true);
if (is_lasr) {
tcg_gen_mb(TCG_MO_ALL | TCG_BAR_LDAQ);
}
--
2.34.1
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v3 09/20] target/arm: Load/store integer pair with one tcg operation
2023-05-30 19:14 [PATCH v3 00/20] target/arm: Implement FEAT_LSE2 Richard Henderson
` (7 preceding siblings ...)
2023-05-30 19:14 ` [PATCH v3 08/20] target/arm: Sink gen_mte_check1 into load/store_exclusive Richard Henderson
@ 2023-05-30 19:14 ` Richard Henderson
2023-05-30 19:14 ` [PATCH v3 10/20] target/arm: Hoist finalize_memop out of do_gpr_{ld, st} Richard Henderson
` (11 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Richard Henderson @ 2023-05-30 19:14 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
This is required for LSE2, where the pair must be treated atomically if
it does not cross a 16-byte boundary. But it simplifies the code to do
this always.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/tcg/translate-a64.c | 70 ++++++++++++++++++++++++++--------
1 file changed, 55 insertions(+), 15 deletions(-)
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 19f0f20896..40c6adc9cc 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -2954,26 +2954,66 @@ static void disas_ldst_pair(DisasContext *s, uint32_t insn)
} else {
TCGv_i64 tcg_rt = cpu_reg(s, rt);
TCGv_i64 tcg_rt2 = cpu_reg(s, rt2);
+ MemOp mop = size + 1;
+
+ /*
+ * With LSE2, non-sign-extending pairs are treated atomically if
+ * aligned, and if unaligned one of the pair will be completely
+ * within a 16-byte block and that element will be atomic.
+ * Otherwise each element is separately atomic.
+ * In all cases, issue one operation with the correct atomicity.
+ *
+ * This treats sign-extending loads like zero-extending loads,
+ * since that reuses the most code below.
+ */
+ if (s->align_mem) {
+ mop |= (size == 2 ? MO_ALIGN_4 : MO_ALIGN_8);
+ }
+ mop = finalize_memop_pair(s, mop);
if (is_load) {
- TCGv_i64 tmp = tcg_temp_new_i64();
+ if (size == 2) {
+ int o2 = s->be_data == MO_LE ? 32 : 0;
+ int o1 = o2 ^ 32;
- /* Do not modify tcg_rt before recognizing any exception
- * from the second load.
- */
- do_gpr_ld(s, tmp, clean_addr, size + is_signed * MO_SIGN,
- false, false, 0, false, false);
- tcg_gen_addi_i64(clean_addr, clean_addr, 1 << size);
- do_gpr_ld(s, tcg_rt2, clean_addr, size + is_signed * MO_SIGN,
- false, false, 0, false, false);
+ tcg_gen_qemu_ld_i64(tcg_rt, clean_addr, get_mem_index(s), mop);
+ if (is_signed) {
+ tcg_gen_sextract_i64(tcg_rt2, tcg_rt, o2, 32);
+ tcg_gen_sextract_i64(tcg_rt, tcg_rt, o1, 32);
+ } else {
+ tcg_gen_extract_i64(tcg_rt2, tcg_rt, o2, 32);
+ tcg_gen_extract_i64(tcg_rt, tcg_rt, o1, 32);
+ }
+ } else {
+ TCGv_i128 tmp = tcg_temp_new_i128();
- tcg_gen_mov_i64(tcg_rt, tmp);
+ tcg_gen_qemu_ld_i128(tmp, clean_addr, get_mem_index(s), mop);
+ if (s->be_data == MO_LE) {
+ tcg_gen_extr_i128_i64(tcg_rt, tcg_rt2, tmp);
+ } else {
+ tcg_gen_extr_i128_i64(tcg_rt2, tcg_rt, tmp);
+ }
+ }
} else {
- do_gpr_st(s, tcg_rt, clean_addr, size,
- false, 0, false, false);
- tcg_gen_addi_i64(clean_addr, clean_addr, 1 << size);
- do_gpr_st(s, tcg_rt2, clean_addr, size,
- false, 0, false, false);
+ if (size == 2) {
+ TCGv_i64 tmp = tcg_temp_new_i64();
+
+ if (s->be_data == MO_LE) {
+ tcg_gen_concat32_i64(tmp, tcg_rt, tcg_rt2);
+ } else {
+ tcg_gen_concat32_i64(tmp, tcg_rt2, tcg_rt);
+ }
+ tcg_gen_qemu_st_i64(tmp, clean_addr, get_mem_index(s), mop);
+ } else {
+ TCGv_i128 tmp = tcg_temp_new_i128();
+
+ if (s->be_data == MO_LE) {
+ tcg_gen_concat_i64_i128(tmp, tcg_rt, tcg_rt2);
+ } else {
+ tcg_gen_concat_i64_i128(tmp, tcg_rt2, tcg_rt);
+ }
+ tcg_gen_qemu_st_i128(tmp, clean_addr, get_mem_index(s), mop);
+ }
}
}
--
2.34.1
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v3 10/20] target/arm: Hoist finalize_memop out of do_gpr_{ld, st}
2023-05-30 19:14 [PATCH v3 00/20] target/arm: Implement FEAT_LSE2 Richard Henderson
` (8 preceding siblings ...)
2023-05-30 19:14 ` [PATCH v3 09/20] target/arm: Load/store integer pair with one tcg operation Richard Henderson
@ 2023-05-30 19:14 ` Richard Henderson
2023-05-30 19:14 ` [PATCH v3 11/20] target/arm: Hoist finalize_memop out of do_fp_{ld, st} Richard Henderson
` (10 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Richard Henderson @ 2023-05-30 19:14 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
We are going to need the complete memop beforehand,
so let's not compute it twice.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/tcg/translate-a64.c | 61 +++++++++++++++++++---------------
1 file changed, 35 insertions(+), 26 deletions(-)
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 40c6adc9cc..24e255aa34 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -848,7 +848,6 @@ static void do_gpr_st_memidx(DisasContext *s, TCGv_i64 source,
unsigned int iss_srt,
bool iss_sf, bool iss_ar)
{
- memop = finalize_memop(s, memop);
tcg_gen_qemu_st_i64(source, tcg_addr, memidx, memop);
if (iss_valid) {
@@ -883,7 +882,6 @@ static void do_gpr_ld_memidx(DisasContext *s, TCGv_i64 dest, TCGv_i64 tcg_addr,
bool iss_valid, unsigned int iss_srt,
bool iss_sf, bool iss_ar)
{
- memop = finalize_memop(s, memop);
tcg_gen_qemu_ld_i64(dest, tcg_addr, memidx, memop);
if (extend && (memop & MO_SIGN)) {
@@ -2637,6 +2635,7 @@ static void disas_ldst_excl(DisasContext *s, uint32_t insn)
int o2_L_o1_o0 = extract32(insn, 21, 3) * 2 | is_lasr;
int size = extract32(insn, 30, 2);
TCGv_i64 clean_addr;
+ MemOp memop;
switch (o2_L_o1_o0) {
case 0x0: /* STXR */
@@ -2673,10 +2672,11 @@ static void disas_ldst_excl(DisasContext *s, uint32_t insn)
gen_check_sp_alignment(s);
}
tcg_gen_mb(TCG_MO_ALL | TCG_BAR_STRL);
+ /* TODO: ARMv8.4-LSE SCTLR.nAA */
+ memop = finalize_memop(s, size | MO_ALIGN);
clean_addr = gen_mte_check1(s, cpu_reg_sp(s, rn),
true, rn != 31, size);
- /* TODO: ARMv8.4-LSE SCTLR.nAA */
- do_gpr_st(s, cpu_reg(s, rt), clean_addr, size | MO_ALIGN, true, rt,
+ do_gpr_st(s, cpu_reg(s, rt), clean_addr, memop, true, rt,
disas_ldst_compute_iss_sf(size, false, 0), is_lasr);
return;
@@ -2691,10 +2691,11 @@ static void disas_ldst_excl(DisasContext *s, uint32_t insn)
if (rn == 31) {
gen_check_sp_alignment(s);
}
+ /* TODO: ARMv8.4-LSE SCTLR.nAA */
+ memop = finalize_memop(s, size | MO_ALIGN);
clean_addr = gen_mte_check1(s, cpu_reg_sp(s, rn),
false, rn != 31, size);
- /* TODO: ARMv8.4-LSE SCTLR.nAA */
- do_gpr_ld(s, cpu_reg(s, rt), clean_addr, size | MO_ALIGN, false, true,
+ do_gpr_ld(s, cpu_reg(s, rt), clean_addr, memop, false, true,
rt, disas_ldst_compute_iss_sf(size, false, 0), is_lasr);
tcg_gen_mb(TCG_MO_ALL | TCG_BAR_LDAQ);
return;
@@ -2802,9 +2803,9 @@ static void disas_ld_lit(DisasContext *s, uint32_t insn)
} else {
/* Only unsigned 32bit loads target 32bit registers. */
bool iss_sf = opc != 0;
+ MemOp memop = finalize_memop(s, size + is_signed * MO_SIGN);
- do_gpr_ld(s, tcg_rt, clean_addr, size + is_signed * MO_SIGN,
- false, true, rt, iss_sf, false);
+ do_gpr_ld(s, tcg_rt, clean_addr, memop, false, true, rt, iss_sf, false);
}
}
@@ -3058,7 +3059,7 @@ static void disas_ldst_reg_imm9(DisasContext *s, uint32_t insn,
bool post_index;
bool writeback;
int memidx;
-
+ MemOp memop;
TCGv_i64 clean_addr, dirty_addr;
if (is_vector) {
@@ -3085,7 +3086,7 @@ static void disas_ldst_reg_imm9(DisasContext *s, uint32_t insn,
return;
}
is_store = (opc == 0);
- is_signed = extract32(opc, 1, 1);
+ is_signed = !is_store && extract32(opc, 1, 1);
is_extended = (size < 3) && extract32(opc, 0, 1);
}
@@ -3119,6 +3120,8 @@ static void disas_ldst_reg_imm9(DisasContext *s, uint32_t insn,
}
memidx = is_unpriv ? get_a64_user_mem_index(s) : get_mem_index(s);
+ memop = finalize_memop(s, size + is_signed * MO_SIGN);
+
clean_addr = gen_mte_check1_mmuidx(s, dirty_addr, is_store,
writeback || rn != 31,
size, is_unpriv, memidx);
@@ -3134,10 +3137,10 @@ static void disas_ldst_reg_imm9(DisasContext *s, uint32_t insn,
bool iss_sf = disas_ldst_compute_iss_sf(size, is_signed, opc);
if (is_store) {
- do_gpr_st_memidx(s, tcg_rt, clean_addr, size, memidx,
+ do_gpr_st_memidx(s, tcg_rt, clean_addr, memop, memidx,
iss_valid, rt, iss_sf, false);
} else {
- do_gpr_ld_memidx(s, tcg_rt, clean_addr, size + is_signed * MO_SIGN,
+ do_gpr_ld_memidx(s, tcg_rt, clean_addr, memop,
is_extended, memidx,
iss_valid, rt, iss_sf, false);
}
@@ -3186,8 +3189,8 @@ static void disas_ldst_reg_roffset(DisasContext *s, uint32_t insn,
bool is_signed = false;
bool is_store = false;
bool is_extended = false;
-
TCGv_i64 tcg_rm, clean_addr, dirty_addr;
+ MemOp memop;
if (extract32(opt, 1, 1) == 0) {
unallocated_encoding(s);
@@ -3214,7 +3217,7 @@ static void disas_ldst_reg_roffset(DisasContext *s, uint32_t insn,
return;
}
is_store = (opc == 0);
- is_signed = extract32(opc, 1, 1);
+ is_signed = !is_store && extract32(opc, 1, 1);
is_extended = (size < 3) && extract32(opc, 0, 1);
}
@@ -3227,6 +3230,8 @@ static void disas_ldst_reg_roffset(DisasContext *s, uint32_t insn,
ext_and_shift_reg(tcg_rm, tcg_rm, opt, shift ? size : 0);
tcg_gen_add_i64(dirty_addr, dirty_addr, tcg_rm);
+
+ memop = finalize_memop(s, size + is_signed * MO_SIGN);
clean_addr = gen_mte_check1(s, dirty_addr, is_store, true, size);
if (is_vector) {
@@ -3238,11 +3243,12 @@ static void disas_ldst_reg_roffset(DisasContext *s, uint32_t insn,
} else {
TCGv_i64 tcg_rt = cpu_reg(s, rt);
bool iss_sf = disas_ldst_compute_iss_sf(size, is_signed, opc);
+
if (is_store) {
- do_gpr_st(s, tcg_rt, clean_addr, size,
+ do_gpr_st(s, tcg_rt, clean_addr, memop,
true, rt, iss_sf, false);
} else {
- do_gpr_ld(s, tcg_rt, clean_addr, size + is_signed * MO_SIGN,
+ do_gpr_ld(s, tcg_rt, clean_addr, memop,
is_extended, true, rt, iss_sf, false);
}
}
@@ -3274,12 +3280,11 @@ static void disas_ldst_reg_unsigned_imm(DisasContext *s, uint32_t insn,
int rn = extract32(insn, 5, 5);
unsigned int imm12 = extract32(insn, 10, 12);
unsigned int offset;
-
TCGv_i64 clean_addr, dirty_addr;
-
bool is_store;
bool is_signed = false;
bool is_extended = false;
+ MemOp memop;
if (is_vector) {
size |= (opc & 2) << 1;
@@ -3301,7 +3306,7 @@ static void disas_ldst_reg_unsigned_imm(DisasContext *s, uint32_t insn,
return;
}
is_store = (opc == 0);
- is_signed = extract32(opc, 1, 1);
+ is_signed = !is_store && extract32(opc, 1, 1);
is_extended = (size < 3) && extract32(opc, 0, 1);
}
@@ -3311,6 +3316,8 @@ static void disas_ldst_reg_unsigned_imm(DisasContext *s, uint32_t insn,
dirty_addr = read_cpu_reg_sp(s, rn, 1);
offset = imm12 << size;
tcg_gen_addi_i64(dirty_addr, dirty_addr, offset);
+
+ memop = finalize_memop(s, size + is_signed * MO_SIGN);
clean_addr = gen_mte_check1(s, dirty_addr, is_store, rn != 31, size);
if (is_vector) {
@@ -3323,10 +3330,9 @@ static void disas_ldst_reg_unsigned_imm(DisasContext *s, uint32_t insn,
TCGv_i64 tcg_rt = cpu_reg(s, rt);
bool iss_sf = disas_ldst_compute_iss_sf(size, is_signed, opc);
if (is_store) {
- do_gpr_st(s, tcg_rt, clean_addr, size,
- true, rt, iss_sf, false);
+ do_gpr_st(s, tcg_rt, clean_addr, memop, true, rt, iss_sf, false);
} else {
- do_gpr_ld(s, tcg_rt, clean_addr, size + is_signed * MO_SIGN,
+ do_gpr_ld(s, tcg_rt, clean_addr, memop,
is_extended, true, rt, iss_sf, false);
}
}
@@ -3356,7 +3362,7 @@ static void disas_ldst_atomic(DisasContext *s, uint32_t insn,
bool a = extract32(insn, 23, 1);
TCGv_i64 tcg_rs, tcg_rt, clean_addr;
AtomicThreeOpFn *fn = NULL;
- MemOp mop = s->be_data | size | MO_ALIGN;
+ MemOp mop = finalize_memop(s, size | MO_ALIGN);
if (is_vector || !dc_isar_feature(aa64_atomics, s)) {
unallocated_encoding(s);
@@ -3417,7 +3423,7 @@ static void disas_ldst_atomic(DisasContext *s, uint32_t insn,
* full load-acquire (we only need "load-acquire processor consistent"),
* but we choose to implement them as full LDAQ.
*/
- do_gpr_ld(s, cpu_reg(s, rt), clean_addr, size, false,
+ do_gpr_ld(s, cpu_reg(s, rt), clean_addr, mop, false,
true, rt, disas_ldst_compute_iss_sf(size, false, 0), true);
tcg_gen_mb(TCG_MO_ALL | TCG_BAR_LDAQ);
return;
@@ -3463,6 +3469,7 @@ static void disas_ldst_pac(DisasContext *s, uint32_t insn,
bool use_key_a = !extract32(insn, 23, 1);
int offset;
TCGv_i64 clean_addr, dirty_addr, tcg_rt;
+ MemOp memop;
if (size != 3 || is_vector || !dc_isar_feature(aa64_pauth, s)) {
unallocated_encoding(s);
@@ -3489,12 +3496,14 @@ static void disas_ldst_pac(DisasContext *s, uint32_t insn,
offset = sextract32(offset << size, 0, 10 + size);
tcg_gen_addi_i64(dirty_addr, dirty_addr, offset);
+ memop = finalize_memop(s, size);
+
/* Note that "clean" and "dirty" here refer to TBI not PAC. */
clean_addr = gen_mte_check1(s, dirty_addr, false,
is_wback || rn != 31, size);
tcg_rt = cpu_reg(s, rt);
- do_gpr_ld(s, tcg_rt, clean_addr, size,
+ do_gpr_ld(s, tcg_rt, clean_addr, memop,
/* extend */ false, /* iss_valid */ !is_wback,
/* iss_srt */ rt, /* iss_sf */ true, /* iss_ar */ false);
@@ -3536,7 +3545,7 @@ static void disas_ldst_ldapr_stlr(DisasContext *s, uint32_t insn)
}
/* TODO: ARMv8.4-LSE SCTLR.nAA */
- mop = size | MO_ALIGN;
+ mop = finalize_memop(s, size | MO_ALIGN);
switch (opc) {
case 0: /* STLURB */
--
2.34.1
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v3 11/20] target/arm: Hoist finalize_memop out of do_fp_{ld, st}
2023-05-30 19:14 [PATCH v3 00/20] target/arm: Implement FEAT_LSE2 Richard Henderson
` (9 preceding siblings ...)
2023-05-30 19:14 ` [PATCH v3 10/20] target/arm: Hoist finalize_memop out of do_gpr_{ld, st} Richard Henderson
@ 2023-05-30 19:14 ` Richard Henderson
2023-05-30 19:14 ` [PATCH v3 12/20] target/arm: Pass memop to gen_mte_check1* Richard Henderson
` (9 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Richard Henderson @ 2023-05-30 19:14 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell, Philippe Mathieu-Daudé
We are going to need the complete memop beforehand,
so let's not compute it twice.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/tcg/translate-a64.c | 43 ++++++++++++++++++----------------
1 file changed, 23 insertions(+), 20 deletions(-)
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 24e255aa34..02dbf76feb 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -915,15 +915,14 @@ static void do_gpr_ld(DisasContext *s, TCGv_i64 dest, TCGv_i64 tcg_addr,
/*
* Store from FP register to memory
*/
-static void do_fp_st(DisasContext *s, int srcidx, TCGv_i64 tcg_addr, int size)
+static void do_fp_st(DisasContext *s, int srcidx, TCGv_i64 tcg_addr, MemOp mop)
{
/* This writes the bottom N bits of a 128 bit wide vector to memory */
TCGv_i64 tmplo = tcg_temp_new_i64();
- MemOp mop = finalize_memop_asimd(s, size);
tcg_gen_ld_i64(tmplo, cpu_env, fp_reg_offset(s, srcidx, MO_64));
- if (size < MO_128) {
+ if ((mop & MO_SIZE) < MO_128) {
tcg_gen_qemu_st_i64(tmplo, tcg_addr, get_mem_index(s), mop);
} else {
TCGv_i64 tmphi = tcg_temp_new_i64();
@@ -939,14 +938,13 @@ static void do_fp_st(DisasContext *s, int srcidx, TCGv_i64 tcg_addr, int size)
/*
* Load from memory to FP register
*/
-static void do_fp_ld(DisasContext *s, int destidx, TCGv_i64 tcg_addr, int size)
+static void do_fp_ld(DisasContext *s, int destidx, TCGv_i64 tcg_addr, MemOp mop)
{
/* This always zero-extends and writes to a full 128 bit wide vector */
TCGv_i64 tmplo = tcg_temp_new_i64();
TCGv_i64 tmphi = NULL;
- MemOp mop = finalize_memop_asimd(s, size);
- if (size < MO_128) {
+ if ((mop & MO_SIZE) < MO_128) {
tcg_gen_qemu_ld_i64(tmplo, tcg_addr, get_mem_index(s), mop);
} else {
TCGv_i128 t16 = tcg_temp_new_i128();
@@ -2775,6 +2773,7 @@ static void disas_ld_lit(DisasContext *s, uint32_t insn)
bool is_signed = false;
int size = 2;
TCGv_i64 tcg_rt, clean_addr;
+ MemOp memop;
if (is_vector) {
if (opc == 3) {
@@ -2785,6 +2784,7 @@ static void disas_ld_lit(DisasContext *s, uint32_t insn)
if (!fp_access_check(s)) {
return;
}
+ memop = finalize_memop_asimd(s, size);
} else {
if (opc == 3) {
/* PRFM (literal) : prefetch */
@@ -2792,19 +2792,19 @@ static void disas_ld_lit(DisasContext *s, uint32_t insn)
}
size = 2 + extract32(opc, 0, 1);
is_signed = extract32(opc, 1, 1);
+ memop = finalize_memop(s, size + is_signed * MO_SIGN);
}
tcg_rt = cpu_reg(s, rt);
clean_addr = tcg_temp_new_i64();
gen_pc_plus_diff(s, clean_addr, imm);
+
if (is_vector) {
- do_fp_ld(s, rt, clean_addr, size);
+ do_fp_ld(s, rt, clean_addr, memop);
} else {
/* Only unsigned 32bit loads target 32bit registers. */
bool iss_sf = opc != 0;
- MemOp memop = finalize_memop(s, size + is_signed * MO_SIGN);
-
do_gpr_ld(s, tcg_rt, clean_addr, memop, false, true, rt, iss_sf, false);
}
}
@@ -2941,16 +2941,18 @@ static void disas_ldst_pair(DisasContext *s, uint32_t insn)
(wback || rn != 31) && !set_tag, 2 << size);
if (is_vector) {
+ MemOp mop = finalize_memop_asimd(s, size);
+
if (is_load) {
- do_fp_ld(s, rt, clean_addr, size);
+ do_fp_ld(s, rt, clean_addr, mop);
} else {
- do_fp_st(s, rt, clean_addr, size);
+ do_fp_st(s, rt, clean_addr, mop);
}
tcg_gen_addi_i64(clean_addr, clean_addr, 1 << size);
if (is_load) {
- do_fp_ld(s, rt2, clean_addr, size);
+ do_fp_ld(s, rt2, clean_addr, mop);
} else {
- do_fp_st(s, rt2, clean_addr, size);
+ do_fp_st(s, rt2, clean_addr, mop);
}
} else {
TCGv_i64 tcg_rt = cpu_reg(s, rt);
@@ -3072,6 +3074,7 @@ static void disas_ldst_reg_imm9(DisasContext *s, uint32_t insn,
if (!fp_access_check(s)) {
return;
}
+ memop = finalize_memop_asimd(s, size);
} else {
if (size == 3 && opc == 2) {
/* PRFM - prefetch */
@@ -3088,6 +3091,7 @@ static void disas_ldst_reg_imm9(DisasContext *s, uint32_t insn,
is_store = (opc == 0);
is_signed = !is_store && extract32(opc, 1, 1);
is_extended = (size < 3) && extract32(opc, 0, 1);
+ memop = finalize_memop(s, size + is_signed * MO_SIGN);
}
switch (idx) {
@@ -3120,7 +3124,6 @@ static void disas_ldst_reg_imm9(DisasContext *s, uint32_t insn,
}
memidx = is_unpriv ? get_a64_user_mem_index(s) : get_mem_index(s);
- memop = finalize_memop(s, size + is_signed * MO_SIGN);
clean_addr = gen_mte_check1_mmuidx(s, dirty_addr, is_store,
writeback || rn != 31,
@@ -3128,9 +3131,9 @@ static void disas_ldst_reg_imm9(DisasContext *s, uint32_t insn,
if (is_vector) {
if (is_store) {
- do_fp_st(s, rt, clean_addr, size);
+ do_fp_st(s, rt, clean_addr, memop);
} else {
- do_fp_ld(s, rt, clean_addr, size);
+ do_fp_ld(s, rt, clean_addr, memop);
}
} else {
TCGv_i64 tcg_rt = cpu_reg(s, rt);
@@ -3236,9 +3239,9 @@ static void disas_ldst_reg_roffset(DisasContext *s, uint32_t insn,
if (is_vector) {
if (is_store) {
- do_fp_st(s, rt, clean_addr, size);
+ do_fp_st(s, rt, clean_addr, memop);
} else {
- do_fp_ld(s, rt, clean_addr, size);
+ do_fp_ld(s, rt, clean_addr, memop);
}
} else {
TCGv_i64 tcg_rt = cpu_reg(s, rt);
@@ -3322,9 +3325,9 @@ static void disas_ldst_reg_unsigned_imm(DisasContext *s, uint32_t insn,
if (is_vector) {
if (is_store) {
- do_fp_st(s, rt, clean_addr, size);
+ do_fp_st(s, rt, clean_addr, memop);
} else {
- do_fp_ld(s, rt, clean_addr, size);
+ do_fp_ld(s, rt, clean_addr, memop);
}
} else {
TCGv_i64 tcg_rt = cpu_reg(s, rt);
--
2.34.1
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v3 12/20] target/arm: Pass memop to gen_mte_check1*
2023-05-30 19:14 [PATCH v3 00/20] target/arm: Implement FEAT_LSE2 Richard Henderson
` (10 preceding siblings ...)
2023-05-30 19:14 ` [PATCH v3 11/20] target/arm: Hoist finalize_memop out of do_fp_{ld, st} Richard Henderson
@ 2023-05-30 19:14 ` Richard Henderson
2023-05-30 19:14 ` [PATCH v3 13/20] target/arm: Pass single_memop to gen_mte_checkN Richard Henderson
` (8 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Richard Henderson @ 2023-05-30 19:14 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
Pass the completed memop to gen_mte_check1_mmuidx.
For the moment, do nothing more than extract the size.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/tcg/translate-a64.h | 2 +-
target/arm/tcg/translate-a64.c | 82 ++++++++++++++++++----------------
target/arm/tcg/translate-sve.c | 7 +--
3 files changed, 49 insertions(+), 42 deletions(-)
diff --git a/target/arm/tcg/translate-a64.h b/target/arm/tcg/translate-a64.h
index 0576c4ea12..cecf2bab8f 100644
--- a/target/arm/tcg/translate-a64.h
+++ b/target/arm/tcg/translate-a64.h
@@ -49,7 +49,7 @@ static inline bool sme_smza_enabled_check(DisasContext *s)
TCGv_i64 clean_data_tbi(DisasContext *s, TCGv_i64 addr);
TCGv_i64 gen_mte_check1(DisasContext *s, TCGv_i64 addr, bool is_write,
- bool tag_checked, int log2_size);
+ bool tag_checked, MemOp memop);
TCGv_i64 gen_mte_checkN(DisasContext *s, TCGv_i64 addr, bool is_write,
bool tag_checked, int size);
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 02dbf76feb..2a7be5c745 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -263,7 +263,7 @@ static void gen_probe_access(DisasContext *s, TCGv_i64 ptr,
*/
static TCGv_i64 gen_mte_check1_mmuidx(DisasContext *s, TCGv_i64 addr,
bool is_write, bool tag_checked,
- int log2_size, bool is_unpriv,
+ MemOp memop, bool is_unpriv,
int core_idx)
{
if (tag_checked && s->mte_active[is_unpriv]) {
@@ -274,7 +274,7 @@ static TCGv_i64 gen_mte_check1_mmuidx(DisasContext *s, TCGv_i64 addr,
desc = FIELD_DP32(desc, MTEDESC, TBI, s->tbid);
desc = FIELD_DP32(desc, MTEDESC, TCMA, s->tcma);
desc = FIELD_DP32(desc, MTEDESC, WRITE, is_write);
- desc = FIELD_DP32(desc, MTEDESC, SIZEM1, (1 << log2_size) - 1);
+ desc = FIELD_DP32(desc, MTEDESC, SIZEM1, memop_size(memop) - 1);
ret = tcg_temp_new_i64();
gen_helper_mte_check(ret, cpu_env, tcg_constant_i32(desc), addr);
@@ -285,9 +285,9 @@ static TCGv_i64 gen_mte_check1_mmuidx(DisasContext *s, TCGv_i64 addr,
}
TCGv_i64 gen_mte_check1(DisasContext *s, TCGv_i64 addr, bool is_write,
- bool tag_checked, int log2_size)
+ bool tag_checked, MemOp memop)
{
- return gen_mte_check1_mmuidx(s, addr, is_write, tag_checked, log2_size,
+ return gen_mte_check1_mmuidx(s, addr, is_write, tag_checked, memop,
false, get_mem_index(s));
}
@@ -2381,19 +2381,31 @@ static void gen_load_exclusive(DisasContext *s, int rt, int rt2, int rn,
int size, bool is_pair)
{
int idx = get_mem_index(s);
- MemOp memop;
TCGv_i64 dirty_addr, clean_addr;
+ MemOp memop;
+
+ /*
+ * For pairs:
+ * if size == 2, the operation is single-copy atomic for the doubleword.
+ * if size == 3, the operation is single-copy atomic for *each* doubleword,
+ * not the entire quadword, however it must be quadword aligned.
+ */
+ memop = size + is_pair;
+ if (memop == MO_128) {
+ memop = finalize_memop_atom(s, MO_128 | MO_ALIGN,
+ MO_ATOM_IFALIGN_PAIR);
+ } else {
+ memop = finalize_memop(s, memop | MO_ALIGN);
+ }
s->is_ldex = true;
dirty_addr = cpu_reg_sp(s, rn);
- clean_addr = gen_mte_check1(s, dirty_addr, false, rn != 31, size);
+ clean_addr = gen_mte_check1(s, dirty_addr, false, rn != 31, memop);
g_assert(size <= 3);
if (is_pair) {
g_assert(size >= 2);
if (size == 2) {
- /* The pair must be single-copy atomic for the doubleword. */
- memop = finalize_memop(s, MO_64 | MO_ALIGN);
tcg_gen_qemu_ld_i64(cpu_exclusive_val, clean_addr, idx, memop);
if (s->be_data == MO_LE) {
tcg_gen_extract_i64(cpu_reg(s, rt), cpu_exclusive_val, 0, 32);
@@ -2403,16 +2415,8 @@ static void gen_load_exclusive(DisasContext *s, int rt, int rt2, int rn,
tcg_gen_extract_i64(cpu_reg(s, rt2), cpu_exclusive_val, 0, 32);
}
} else {
- /*
- * The pair must be single-copy atomic for *each* doubleword, not
- * the entire quadword, however it must be quadword aligned.
- * Expose the complete load to tcg, for ease of tlb lookup,
- * but indicate that only 8-byte atomicity is required.
- */
TCGv_i128 t16 = tcg_temp_new_i128();
- memop = finalize_memop_atom(s, MO_128 | MO_ALIGN_16,
- MO_ATOM_IFALIGN_PAIR);
tcg_gen_qemu_ld_i128(t16, clean_addr, idx, memop);
if (s->be_data == MO_LE) {
@@ -2426,7 +2430,6 @@ static void gen_load_exclusive(DisasContext *s, int rt, int rt2, int rn,
tcg_gen_mov_i64(cpu_reg(s, rt2), cpu_exclusive_high);
}
} else {
- memop = finalize_memop(s, size | MO_ALIGN);
tcg_gen_qemu_ld_i64(cpu_exclusive_val, clean_addr, idx, memop);
tcg_gen_mov_i64(cpu_reg(s, rt), cpu_exclusive_val);
}
@@ -2451,9 +2454,13 @@ static void gen_store_exclusive(DisasContext *s, int rd, int rt, int rt2,
TCGLabel *fail_label = gen_new_label();
TCGLabel *done_label = gen_new_label();
TCGv_i64 tmp, dirty_addr, clean_addr;
+ MemOp memop;
+
+ memop = (size + is_pair) | MO_ALIGN;
+ memop = finalize_memop(s, memop);
dirty_addr = cpu_reg_sp(s, rn);
- clean_addr = gen_mte_check1(s, dirty_addr, true, rn != 31, size);
+ clean_addr = gen_mte_check1(s, dirty_addr, true, rn != 31, memop);
tcg_gen_brcond_i64(TCG_COND_NE, clean_addr, cpu_exclusive_addr, fail_label);
@@ -2467,8 +2474,7 @@ static void gen_store_exclusive(DisasContext *s, int rd, int rt, int rt2,
}
tcg_gen_atomic_cmpxchg_i64(tmp, cpu_exclusive_addr,
cpu_exclusive_val, tmp,
- get_mem_index(s),
- MO_64 | MO_ALIGN | s->be_data);
+ get_mem_index(s), memop);
tcg_gen_setcond_i64(TCG_COND_NE, tmp, tmp, cpu_exclusive_val);
} else {
TCGv_i128 t16 = tcg_temp_new_i128();
@@ -2486,8 +2492,7 @@ static void gen_store_exclusive(DisasContext *s, int rd, int rt, int rt2,
}
tcg_gen_atomic_cmpxchg_i128(t16, cpu_exclusive_addr, c16, t16,
- get_mem_index(s),
- MO_128 | MO_ALIGN | s->be_data);
+ get_mem_index(s), memop);
a = tcg_temp_new_i64();
b = tcg_temp_new_i64();
@@ -2505,8 +2510,7 @@ static void gen_store_exclusive(DisasContext *s, int rd, int rt, int rt2,
}
} else {
tcg_gen_atomic_cmpxchg_i64(tmp, cpu_exclusive_addr, cpu_exclusive_val,
- cpu_reg(s, rt), get_mem_index(s),
- size | MO_ALIGN | s->be_data);
+ cpu_reg(s, rt), get_mem_index(s), memop);
tcg_gen_setcond_i64(TCG_COND_NE, tmp, tmp, cpu_exclusive_val);
}
tcg_gen_mov_i64(cpu_reg(s, rd), tmp);
@@ -2525,13 +2529,15 @@ static void gen_compare_and_swap(DisasContext *s, int rs, int rt,
TCGv_i64 tcg_rt = cpu_reg(s, rt);
int memidx = get_mem_index(s);
TCGv_i64 clean_addr;
+ MemOp memop;
if (rn == 31) {
gen_check_sp_alignment(s);
}
- clean_addr = gen_mte_check1(s, cpu_reg_sp(s, rn), true, rn != 31, size);
- tcg_gen_atomic_cmpxchg_i64(tcg_rs, clean_addr, tcg_rs, tcg_rt, memidx,
- size | MO_ALIGN | s->be_data);
+ memop = finalize_memop(s, size | MO_ALIGN);
+ clean_addr = gen_mte_check1(s, cpu_reg_sp(s, rn), true, rn != 31, memop);
+ tcg_gen_atomic_cmpxchg_i64(tcg_rs, clean_addr, tcg_rs, tcg_rt,
+ memidx, memop);
}
static void gen_compare_and_swap_pair(DisasContext *s, int rs, int rt,
@@ -2543,13 +2549,15 @@ static void gen_compare_and_swap_pair(DisasContext *s, int rs, int rt,
TCGv_i64 t2 = cpu_reg(s, rt + 1);
TCGv_i64 clean_addr;
int memidx = get_mem_index(s);
+ MemOp memop;
if (rn == 31) {
gen_check_sp_alignment(s);
}
/* This is a single atomic access, despite the "pair". */
- clean_addr = gen_mte_check1(s, cpu_reg_sp(s, rn), true, rn != 31, size + 1);
+ memop = finalize_memop(s, (size + 1) | MO_ALIGN);
+ clean_addr = gen_mte_check1(s, cpu_reg_sp(s, rn), true, rn != 31, memop);
if (size == 2) {
TCGv_i64 cmp = tcg_temp_new_i64();
@@ -2563,8 +2571,7 @@ static void gen_compare_and_swap_pair(DisasContext *s, int rs, int rt,
tcg_gen_concat32_i64(cmp, s2, s1);
}
- tcg_gen_atomic_cmpxchg_i64(cmp, clean_addr, cmp, val, memidx,
- MO_64 | MO_ALIGN | s->be_data);
+ tcg_gen_atomic_cmpxchg_i64(cmp, clean_addr, cmp, val, memidx, memop);
if (s->be_data == MO_LE) {
tcg_gen_extr32_i64(s1, s2, cmp);
@@ -2583,8 +2590,7 @@ static void gen_compare_and_swap_pair(DisasContext *s, int rs, int rt,
tcg_gen_concat_i64_i128(cmp, s2, s1);
}
- tcg_gen_atomic_cmpxchg_i128(cmp, clean_addr, cmp, val, memidx,
- MO_128 | MO_ALIGN | s->be_data);
+ tcg_gen_atomic_cmpxchg_i128(cmp, clean_addr, cmp, val, memidx, memop);
if (s->be_data == MO_LE) {
tcg_gen_extr_i128_i64(s1, s2, cmp);
@@ -2673,7 +2679,7 @@ static void disas_ldst_excl(DisasContext *s, uint32_t insn)
/* TODO: ARMv8.4-LSE SCTLR.nAA */
memop = finalize_memop(s, size | MO_ALIGN);
clean_addr = gen_mte_check1(s, cpu_reg_sp(s, rn),
- true, rn != 31, size);
+ true, rn != 31, memop);
do_gpr_st(s, cpu_reg(s, rt), clean_addr, memop, true, rt,
disas_ldst_compute_iss_sf(size, false, 0), is_lasr);
return;
@@ -2692,7 +2698,7 @@ static void disas_ldst_excl(DisasContext *s, uint32_t insn)
/* TODO: ARMv8.4-LSE SCTLR.nAA */
memop = finalize_memop(s, size | MO_ALIGN);
clean_addr = gen_mte_check1(s, cpu_reg_sp(s, rn),
- false, rn != 31, size);
+ false, rn != 31, memop);
do_gpr_ld(s, cpu_reg(s, rt), clean_addr, memop, false, true,
rt, disas_ldst_compute_iss_sf(size, false, 0), is_lasr);
tcg_gen_mb(TCG_MO_ALL | TCG_BAR_LDAQ);
@@ -3235,7 +3241,7 @@ static void disas_ldst_reg_roffset(DisasContext *s, uint32_t insn,
tcg_gen_add_i64(dirty_addr, dirty_addr, tcg_rm);
memop = finalize_memop(s, size + is_signed * MO_SIGN);
- clean_addr = gen_mte_check1(s, dirty_addr, is_store, true, size);
+ clean_addr = gen_mte_check1(s, dirty_addr, is_store, true, memop);
if (is_vector) {
if (is_store) {
@@ -3321,7 +3327,7 @@ static void disas_ldst_reg_unsigned_imm(DisasContext *s, uint32_t insn,
tcg_gen_addi_i64(dirty_addr, dirty_addr, offset);
memop = finalize_memop(s, size + is_signed * MO_SIGN);
- clean_addr = gen_mte_check1(s, dirty_addr, is_store, rn != 31, size);
+ clean_addr = gen_mte_check1(s, dirty_addr, is_store, rn != 31, memop);
if (is_vector) {
if (is_store) {
@@ -3416,7 +3422,7 @@ static void disas_ldst_atomic(DisasContext *s, uint32_t insn,
if (rn == 31) {
gen_check_sp_alignment(s);
}
- clean_addr = gen_mte_check1(s, cpu_reg_sp(s, rn), false, rn != 31, size);
+ clean_addr = gen_mte_check1(s, cpu_reg_sp(s, rn), false, rn != 31, mop);
if (o3_opc == 014) {
/*
@@ -3503,7 +3509,7 @@ static void disas_ldst_pac(DisasContext *s, uint32_t insn,
/* Note that "clean" and "dirty" here refer to TBI not PAC. */
clean_addr = gen_mte_check1(s, dirty_addr, false,
- is_wback || rn != 31, size);
+ is_wback || rn != 31, memop);
tcg_rt = cpu_reg(s, rt);
do_gpr_ld(s, tcg_rt, clean_addr, memop,
diff --git a/target/arm/tcg/translate-sve.c b/target/arm/tcg/translate-sve.c
index 058f7ef237..18ab5bf7c6 100644
--- a/target/arm/tcg/translate-sve.c
+++ b/target/arm/tcg/translate-sve.c
@@ -5020,6 +5020,7 @@ static bool trans_LD1R_zpri(DisasContext *s, arg_rpri_load *a)
unsigned msz = dtype_msz(a->dtype);
TCGLabel *over;
TCGv_i64 temp, clean_addr;
+ MemOp memop;
if (!dc_isar_feature(aa64_sve, s)) {
return false;
@@ -5049,10 +5050,10 @@ static bool trans_LD1R_zpri(DisasContext *s, arg_rpri_load *a)
/* Load the data. */
temp = tcg_temp_new_i64();
tcg_gen_addi_i64(temp, cpu_reg_sp(s, a->rn), a->imm << msz);
- clean_addr = gen_mte_check1(s, temp, false, true, msz);
- tcg_gen_qemu_ld_i64(temp, clean_addr, get_mem_index(s),
- finalize_memop(s, dtype_mop[a->dtype]));
+ memop = finalize_memop(s, dtype_mop[a->dtype]);
+ clean_addr = gen_mte_check1(s, temp, false, true, memop);
+ tcg_gen_qemu_ld_i64(temp, clean_addr, get_mem_index(s), memop);
/* Broadcast to *all* elements. */
tcg_gen_gvec_dup_i64(esz, vec_full_reg_offset(s, a->rd),
--
2.34.1
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v3 13/20] target/arm: Pass single_memop to gen_mte_checkN
2023-05-30 19:14 [PATCH v3 00/20] target/arm: Implement FEAT_LSE2 Richard Henderson
` (11 preceding siblings ...)
2023-05-30 19:14 ` [PATCH v3 12/20] target/arm: Pass memop to gen_mte_check1* Richard Henderson
@ 2023-05-30 19:14 ` Richard Henderson
2023-05-30 19:14 ` [PATCH v3 14/20] target/arm: Check alignment in helper_mte_check Richard Henderson
` (7 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Richard Henderson @ 2023-05-30 19:14 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
Pass the individual memop to gen_mte_checkN.
For the moment, do nothing with it.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/tcg/translate-a64.h | 2 +-
target/arm/tcg/translate-a64.c | 31 +++++++++++++++++++------------
target/arm/tcg/translate-sve.c | 4 ++--
3 files changed, 22 insertions(+), 15 deletions(-)
diff --git a/target/arm/tcg/translate-a64.h b/target/arm/tcg/translate-a64.h
index cecf2bab8f..b55dc435fc 100644
--- a/target/arm/tcg/translate-a64.h
+++ b/target/arm/tcg/translate-a64.h
@@ -51,7 +51,7 @@ TCGv_i64 clean_data_tbi(DisasContext *s, TCGv_i64 addr);
TCGv_i64 gen_mte_check1(DisasContext *s, TCGv_i64 addr, bool is_write,
bool tag_checked, MemOp memop);
TCGv_i64 gen_mte_checkN(DisasContext *s, TCGv_i64 addr, bool is_write,
- bool tag_checked, int size);
+ bool tag_checked, int total_size, MemOp memop);
/* We should have at some point before trying to access an FP register
* done the necessary access check, so assert that
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 2a7be5c745..214a9b1638 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -295,7 +295,7 @@ TCGv_i64 gen_mte_check1(DisasContext *s, TCGv_i64 addr, bool is_write,
* For MTE, check multiple logical sequential accesses.
*/
TCGv_i64 gen_mte_checkN(DisasContext *s, TCGv_i64 addr, bool is_write,
- bool tag_checked, int size)
+ bool tag_checked, int total_size, MemOp single_mop)
{
if (tag_checked && s->mte_active[0]) {
TCGv_i64 ret;
@@ -305,7 +305,7 @@ TCGv_i64 gen_mte_checkN(DisasContext *s, TCGv_i64 addr, bool is_write,
desc = FIELD_DP32(desc, MTEDESC, TBI, s->tbid);
desc = FIELD_DP32(desc, MTEDESC, TCMA, s->tcma);
desc = FIELD_DP32(desc, MTEDESC, WRITE, is_write);
- desc = FIELD_DP32(desc, MTEDESC, SIZEM1, size - 1);
+ desc = FIELD_DP32(desc, MTEDESC, SIZEM1, total_size - 1);
ret = tcg_temp_new_i64();
gen_helper_mte_check(ret, cpu_env, tcg_constant_i32(desc), addr);
@@ -2853,14 +2853,12 @@ static void disas_ldst_pair(DisasContext *s, uint32_t insn)
bool is_vector = extract32(insn, 26, 1);
bool is_load = extract32(insn, 22, 1);
int opc = extract32(insn, 30, 2);
-
bool is_signed = false;
bool postindex = false;
bool wback = false;
bool set_tag = false;
-
TCGv_i64 clean_addr, dirty_addr;
-
+ MemOp mop;
int size;
if (opc == 3) {
@@ -2943,12 +2941,17 @@ static void disas_ldst_pair(DisasContext *s, uint32_t insn)
}
}
+ if (is_vector) {
+ mop = finalize_memop_asimd(s, size);
+ } else {
+ mop = finalize_memop(s, size);
+ }
clean_addr = gen_mte_checkN(s, dirty_addr, !is_load,
- (wback || rn != 31) && !set_tag, 2 << size);
+ (wback || rn != 31) && !set_tag,
+ 2 << size, mop);
if (is_vector) {
- MemOp mop = finalize_memop_asimd(s, size);
-
+ /* LSE2 does not merge FP pairs; leave these as separate operations. */
if (is_load) {
do_fp_ld(s, rt, clean_addr, mop);
} else {
@@ -2963,9 +2966,11 @@ static void disas_ldst_pair(DisasContext *s, uint32_t insn)
} else {
TCGv_i64 tcg_rt = cpu_reg(s, rt);
TCGv_i64 tcg_rt2 = cpu_reg(s, rt2);
- MemOp mop = size + 1;
/*
+ * We built mop above for the single logical access -- rebuild it
+ * now for the paired operation.
+ *
* With LSE2, non-sign-extending pairs are treated atomically if
* aligned, and if unaligned one of the pair will be completely
* within a 16-byte block and that element will be atomic.
@@ -2975,6 +2980,7 @@ static void disas_ldst_pair(DisasContext *s, uint32_t insn)
* This treats sign-extending loads like zero-extending loads,
* since that reuses the most code below.
*/
+ mop = size + 1;
if (s->align_mem) {
mop |= (size == 2 ? MO_ALIGN_4 : MO_ALIGN_8);
}
@@ -3753,7 +3759,7 @@ static void disas_ldst_multiple_struct(DisasContext *s, uint32_t insn)
* promote consecutive little-endian elements below.
*/
clean_addr = gen_mte_checkN(s, tcg_rn, is_store, is_postidx || rn != 31,
- total);
+ total, finalize_memop(s, size));
/*
* Consecutive little-endian elements from a single register
@@ -3911,10 +3917,11 @@ static void disas_ldst_single_struct(DisasContext *s, uint32_t insn)
total = selem << scale;
tcg_rn = cpu_reg_sp(s, rn);
- clean_addr = gen_mte_checkN(s, tcg_rn, !is_load, is_postidx || rn != 31,
- total);
mop = finalize_memop(s, scale);
+ clean_addr = gen_mte_checkN(s, tcg_rn, !is_load, is_postidx || rn != 31,
+ total, mop);
+
tcg_ebytes = tcg_constant_i64(1 << scale);
for (xs = 0; xs < selem; xs++) {
if (replicate) {
diff --git a/target/arm/tcg/translate-sve.c b/target/arm/tcg/translate-sve.c
index 18ab5bf7c6..1eea6ab5ac 100644
--- a/target/arm/tcg/translate-sve.c
+++ b/target/arm/tcg/translate-sve.c
@@ -4187,7 +4187,7 @@ void gen_sve_ldr(DisasContext *s, TCGv_ptr base, int vofs,
dirty_addr = tcg_temp_new_i64();
tcg_gen_addi_i64(dirty_addr, cpu_reg_sp(s, rn), imm);
- clean_addr = gen_mte_checkN(s, dirty_addr, false, rn != 31, len);
+ clean_addr = gen_mte_checkN(s, dirty_addr, false, rn != 31, len, MO_8);
/*
* Note that unpredicated load/store of vector/predicate registers
@@ -4289,7 +4289,7 @@ void gen_sve_str(DisasContext *s, TCGv_ptr base, int vofs,
dirty_addr = tcg_temp_new_i64();
tcg_gen_addi_i64(dirty_addr, cpu_reg_sp(s, rn), imm);
- clean_addr = gen_mte_checkN(s, dirty_addr, false, rn != 31, len);
+ clean_addr = gen_mte_checkN(s, dirty_addr, false, rn != 31, len, MO_8);
/* Note that unpredicated load/store of vector/predicate registers
* are defined as a stream of bytes, which equates to little-endian
--
2.34.1
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v3 14/20] target/arm: Check alignment in helper_mte_check
2023-05-30 19:14 [PATCH v3 00/20] target/arm: Implement FEAT_LSE2 Richard Henderson
` (12 preceding siblings ...)
2023-05-30 19:14 ` [PATCH v3 13/20] target/arm: Pass single_memop to gen_mte_checkN Richard Henderson
@ 2023-05-30 19:14 ` Richard Henderson
2023-05-30 19:14 ` [PATCH v3 15/20] target/arm: Add SCTLR.nAA to TBFLAG_A64 Richard Henderson
` (6 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Richard Henderson @ 2023-05-30 19:14 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
Fixes a bug in that with SCTLR.A set, we should raise any
alignment fault before raising any MTE check fault.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/internals.h | 3 ++-
target/arm/tcg/mte_helper.c | 18 ++++++++++++++++++
target/arm/tcg/translate-a64.c | 2 ++
3 files changed, 22 insertions(+), 1 deletion(-)
diff --git a/target/arm/internals.h b/target/arm/internals.h
index c869d18c38..05b5231d43 100644
--- a/target/arm/internals.h
+++ b/target/arm/internals.h
@@ -1242,7 +1242,8 @@ FIELD(MTEDESC, MIDX, 0, 4)
FIELD(MTEDESC, TBI, 4, 2)
FIELD(MTEDESC, TCMA, 6, 2)
FIELD(MTEDESC, WRITE, 8, 1)
-FIELD(MTEDESC, SIZEM1, 9, SIMD_DATA_BITS - 9) /* size - 1 */
+FIELD(MTEDESC, ALIGN, 9, 3)
+FIELD(MTEDESC, SIZEM1, 12, SIMD_DATA_BITS - 12) /* size - 1 */
bool mte_probe(CPUARMState *env, uint32_t desc, uint64_t ptr);
uint64_t mte_check(CPUARMState *env, uint32_t desc, uint64_t ptr, uintptr_t ra);
diff --git a/target/arm/tcg/mte_helper.c b/target/arm/tcg/mte_helper.c
index a4f3f92bc0..9c64def081 100644
--- a/target/arm/tcg/mte_helper.c
+++ b/target/arm/tcg/mte_helper.c
@@ -785,6 +785,24 @@ uint64_t mte_check(CPUARMState *env, uint32_t desc, uint64_t ptr, uintptr_t ra)
uint64_t HELPER(mte_check)(CPUARMState *env, uint32_t desc, uint64_t ptr)
{
+ /*
+ * R_XCHFJ: Alignment check not caused by memory type is priority 1,
+ * higher than any translation fault. When MTE is disabled, tcg
+ * performs the alignment check during the code generated for the
+ * memory access. With MTE enabled, we must check this here before
+ * raising any translation fault in allocation_tag_mem.
+ */
+ unsigned align = FIELD_EX32(desc, MTEDESC, ALIGN);
+ if (unlikely(align)) {
+ align = (1u << align) - 1;
+ if (unlikely(ptr & align)) {
+ int idx = FIELD_EX32(desc, MTEDESC, MIDX);
+ bool w = FIELD_EX32(desc, MTEDESC, WRITE);
+ MMUAccessType type = w ? MMU_DATA_STORE : MMU_DATA_LOAD;
+ arm_cpu_do_unaligned_access(env_cpu(env), ptr, type, idx, GETPC());
+ }
+ }
+
return mte_check(env, desc, ptr, GETPC());
}
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 214a9b1638..8301d6c8e2 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -274,6 +274,7 @@ static TCGv_i64 gen_mte_check1_mmuidx(DisasContext *s, TCGv_i64 addr,
desc = FIELD_DP32(desc, MTEDESC, TBI, s->tbid);
desc = FIELD_DP32(desc, MTEDESC, TCMA, s->tcma);
desc = FIELD_DP32(desc, MTEDESC, WRITE, is_write);
+ desc = FIELD_DP32(desc, MTEDESC, ALIGN, get_alignment_bits(memop));
desc = FIELD_DP32(desc, MTEDESC, SIZEM1, memop_size(memop) - 1);
ret = tcg_temp_new_i64();
@@ -305,6 +306,7 @@ TCGv_i64 gen_mte_checkN(DisasContext *s, TCGv_i64 addr, bool is_write,
desc = FIELD_DP32(desc, MTEDESC, TBI, s->tbid);
desc = FIELD_DP32(desc, MTEDESC, TCMA, s->tcma);
desc = FIELD_DP32(desc, MTEDESC, WRITE, is_write);
+ desc = FIELD_DP32(desc, MTEDESC, ALIGN, get_alignment_bits(single_mop));
desc = FIELD_DP32(desc, MTEDESC, SIZEM1, total_size - 1);
ret = tcg_temp_new_i64();
--
2.34.1
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v3 15/20] target/arm: Add SCTLR.nAA to TBFLAG_A64
2023-05-30 19:14 [PATCH v3 00/20] target/arm: Implement FEAT_LSE2 Richard Henderson
` (13 preceding siblings ...)
2023-05-30 19:14 ` [PATCH v3 14/20] target/arm: Check alignment in helper_mte_check Richard Henderson
@ 2023-05-30 19:14 ` Richard Henderson
2023-05-30 19:14 ` [PATCH v3 16/20] target/arm: Relax ordered/atomic alignment checks for LSE2 Richard Henderson
` (5 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Richard Henderson @ 2023-05-30 19:14 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/cpu.h | 3 ++-
target/arm/tcg/translate.h | 2 ++
target/arm/tcg/hflags.c | 6 ++++++
target/arm/tcg/translate-a64.c | 1 +
4 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index c1db26b299..36c608f0e6 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -1248,7 +1248,7 @@ void pmu_init(ARMCPU *cpu);
#define SCTLR_D (1U << 5) /* up to v5; RAO in v6 */
#define SCTLR_CP15BEN (1U << 5) /* v7 onward */
#define SCTLR_L (1U << 6) /* up to v5; RAO in v6 and v7; RAZ in v8 */
-#define SCTLR_nAA (1U << 6) /* when v8.4-LSE is implemented */
+#define SCTLR_nAA (1U << 6) /* when FEAT_LSE2 is implemented */
#define SCTLR_B (1U << 7) /* up to v6; RAZ in v7 */
#define SCTLR_ITD (1U << 7) /* v8 onward */
#define SCTLR_S (1U << 8) /* up to v6; RAZ in v7 */
@@ -3044,6 +3044,7 @@ FIELD(TBFLAG_A64, SVL, 24, 4)
/* Indicates that SME Streaming mode is active, and SMCR_ELx.FA64 is not. */
FIELD(TBFLAG_A64, SME_TRAP_NONSTREAMING, 28, 1)
FIELD(TBFLAG_A64, FGT_ERET, 29, 1)
+FIELD(TBFLAG_A64, NAA, 30, 1)
/*
* Helpers for using the above.
diff --git a/target/arm/tcg/translate.h b/target/arm/tcg/translate.h
index 626cf07970..38086a23f4 100644
--- a/target/arm/tcg/translate.h
+++ b/target/arm/tcg/translate.h
@@ -137,6 +137,8 @@ typedef struct DisasContext {
bool fgt_eret;
/* True if fine-grained trap on SVC is enabled */
bool fgt_svc;
+ /* True if FEAT_LSE2 SCTLR_ELx.nAA is set */
+ bool naa;
/*
* >= 0, a copy of PSTATE.BTYPE, which will be 0 without v8.5-BTI.
* < 0, set by the current instruction.
diff --git a/target/arm/tcg/hflags.c b/target/arm/tcg/hflags.c
index b2ccd77cff..616c5fa723 100644
--- a/target/arm/tcg/hflags.c
+++ b/target/arm/tcg/hflags.c
@@ -248,6 +248,12 @@ static CPUARMTBFlags rebuild_hflags_a64(CPUARMState *env, int el, int fp_el,
}
}
+ if (cpu_isar_feature(aa64_lse2, env_archcpu(env))) {
+ if (sctlr & SCTLR_nAA) {
+ DP_TBFLAG_A64(flags, NAA, 1);
+ }
+ }
+
/* Compute the condition for using AccType_UNPRIV for LDTR et al. */
if (!(env->pstate & PSTATE_UAO)) {
switch (mmu_idx) {
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 8301d6c8e2..bbcdf31728 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -14163,6 +14163,7 @@ static void aarch64_tr_init_disas_context(DisasContextBase *dcbase,
dc->pstate_sm = EX_TBFLAG_A64(tb_flags, PSTATE_SM);
dc->pstate_za = EX_TBFLAG_A64(tb_flags, PSTATE_ZA);
dc->sme_trap_nonstreaming = EX_TBFLAG_A64(tb_flags, SME_TRAP_NONSTREAMING);
+ dc->naa = EX_TBFLAG_A64(tb_flags, NAA);
dc->vec_len = 0;
dc->vec_stride = 0;
dc->cp_regs = arm_cpu->cp_regs;
--
2.34.1
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v3 16/20] target/arm: Relax ordered/atomic alignment checks for LSE2
2023-05-30 19:14 [PATCH v3 00/20] target/arm: Implement FEAT_LSE2 Richard Henderson
` (14 preceding siblings ...)
2023-05-30 19:14 ` [PATCH v3 15/20] target/arm: Add SCTLR.nAA to TBFLAG_A64 Richard Henderson
@ 2023-05-30 19:14 ` Richard Henderson
2023-05-30 19:14 ` [PATCH v3 17/20] target/arm: Move mte check for store-exclusive Richard Henderson
` (4 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Richard Henderson @ 2023-05-30 19:14 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm
FEAT_LSE2 only requires that atomic operations not cross a
16-byte boundary. Ordered operations may be completely
unaligned if SCTLR.nAA is set.
Because this alignment check is so special, do it by hand.
Make sure not to keep TCG temps live across the branch.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/tcg/helper-a64.h | 3 +
target/arm/tcg/helper-a64.c | 7 ++
target/arm/tcg/translate-a64.c | 120 ++++++++++++++++++++++++++-------
3 files changed, 104 insertions(+), 26 deletions(-)
diff --git a/target/arm/tcg/helper-a64.h b/target/arm/tcg/helper-a64.h
index ff56807247..3d5957c11f 100644
--- a/target/arm/tcg/helper-a64.h
+++ b/target/arm/tcg/helper-a64.h
@@ -110,3 +110,6 @@ DEF_HELPER_FLAGS_2(st2g_stub, TCG_CALL_NO_WG, void, env, 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_tags, TCG_CALL_NO_WG, void, env, i64, i64)
+
+DEF_HELPER_FLAGS_4(unaligned_access, TCG_CALL_NO_WG,
+ noreturn, env, i64, i32, i32)
diff --git a/target/arm/tcg/helper-a64.c b/target/arm/tcg/helper-a64.c
index c3edf163be..1c9370f07b 100644
--- a/target/arm/tcg/helper-a64.c
+++ b/target/arm/tcg/helper-a64.c
@@ -952,3 +952,10 @@ void HELPER(dc_zva)(CPUARMState *env, uint64_t vaddr_in)
memset(mem, 0, blocklen);
}
+
+void HELPER(unaligned_access)(CPUARMState *env, uint64_t addr,
+ uint32_t access_type, uint32_t mmu_idx)
+{
+ arm_cpu_do_unaligned_access(env_cpu(env), addr, access_type,
+ mmu_idx, GETPC());
+}
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index bbcdf31728..49cb7a7dd5 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -317,6 +317,89 @@ TCGv_i64 gen_mte_checkN(DisasContext *s, TCGv_i64 addr, bool is_write,
return clean_data_tbi(s, addr);
}
+/*
+ * Generate the special alignment check that applies to AccType_ATOMIC
+ * and AccType_ORDERED insns under FEAT_LSE2: the access need not be
+ * naturally aligned, but it must not cross a 16-byte boundary.
+ * See AArch64.CheckAlignment().
+ */
+static void check_lse2_align(DisasContext *s, int rn, int imm,
+ bool is_write, MemOp mop)
+{
+ TCGv_i32 tmp;
+ TCGv_i64 addr;
+ TCGLabel *over_label;
+ MMUAccessType type;
+ int mmu_idx;
+
+ tmp = tcg_temp_new_i32();
+ tcg_gen_extrl_i64_i32(tmp, cpu_reg_sp(s, rn));
+ tcg_gen_addi_i32(tmp, tmp, imm & 15);
+ tcg_gen_andi_i32(tmp, tmp, 15);
+ tcg_gen_addi_i32(tmp, tmp, memop_size(mop));
+
+ over_label = gen_new_label();
+ tcg_gen_brcondi_i32(TCG_COND_LEU, tmp, 16, over_label);
+
+ addr = tcg_temp_new_i64();
+ tcg_gen_addi_i64(addr, cpu_reg_sp(s, rn), imm);
+
+ type = is_write ? MMU_DATA_STORE : MMU_DATA_LOAD,
+ mmu_idx = get_mem_index(s);
+ gen_helper_unaligned_access(cpu_env, addr, tcg_constant_i32(type),
+ tcg_constant_i32(mmu_idx));
+
+ gen_set_label(over_label);
+
+}
+
+/* Handle the alignment check for AccType_ATOMIC instructions. */
+static MemOp check_atomic_align(DisasContext *s, int rn, MemOp mop)
+{
+ MemOp size = mop & MO_SIZE;
+
+ if (size == MO_8) {
+ return mop;
+ }
+
+ /*
+ * If size == MO_128, this is a LDXP, and the operation is single-copy
+ * atomic for each doubleword, not the entire quadword; it still must
+ * be quadword aligned.
+ */
+ if (size == MO_128) {
+ return finalize_memop_atom(s, MO_128 | MO_ALIGN,
+ MO_ATOM_IFALIGN_PAIR);
+ }
+ if (dc_isar_feature(aa64_lse2, s)) {
+ check_lse2_align(s, rn, 0, true, mop);
+ } else {
+ mop |= MO_ALIGN;
+ }
+ return finalize_memop(s, mop);
+}
+
+/* Handle the alignment check for AccType_ORDERED instructions. */
+static MemOp check_ordered_align(DisasContext *s, int rn, int imm,
+ bool is_write, MemOp mop)
+{
+ MemOp size = mop & MO_SIZE;
+
+ if (size == MO_8) {
+ return mop;
+ }
+ if (size == MO_128) {
+ return finalize_memop_atom(s, MO_128 | MO_ALIGN,
+ MO_ATOM_IFALIGN_PAIR);
+ }
+ if (!dc_isar_feature(aa64_lse2, s)) {
+ mop |= MO_ALIGN;
+ } else if (!s->naa) {
+ check_lse2_align(s, rn, imm, is_write, mop);
+ }
+ return finalize_memop(s, mop);
+}
+
typedef struct DisasCompare64 {
TCGCond cond;
TCGv_i64 value;
@@ -2384,21 +2467,7 @@ static void gen_load_exclusive(DisasContext *s, int rt, int rt2, int rn,
{
int idx = get_mem_index(s);
TCGv_i64 dirty_addr, clean_addr;
- MemOp memop;
-
- /*
- * For pairs:
- * if size == 2, the operation is single-copy atomic for the doubleword.
- * if size == 3, the operation is single-copy atomic for *each* doubleword,
- * not the entire quadword, however it must be quadword aligned.
- */
- memop = size + is_pair;
- if (memop == MO_128) {
- memop = finalize_memop_atom(s, MO_128 | MO_ALIGN,
- MO_ATOM_IFALIGN_PAIR);
- } else {
- memop = finalize_memop(s, memop | MO_ALIGN);
- }
+ MemOp memop = check_atomic_align(s, rn, size + is_pair);
s->is_ldex = true;
dirty_addr = cpu_reg_sp(s, rn);
@@ -2536,7 +2605,7 @@ static void gen_compare_and_swap(DisasContext *s, int rs, int rt,
if (rn == 31) {
gen_check_sp_alignment(s);
}
- memop = finalize_memop(s, size | MO_ALIGN);
+ memop = check_atomic_align(s, rn, size);
clean_addr = gen_mte_check1(s, cpu_reg_sp(s, rn), true, rn != 31, memop);
tcg_gen_atomic_cmpxchg_i64(tcg_rs, clean_addr, tcg_rs, tcg_rt,
memidx, memop);
@@ -2558,7 +2627,7 @@ static void gen_compare_and_swap_pair(DisasContext *s, int rs, int rt,
}
/* This is a single atomic access, despite the "pair". */
- memop = finalize_memop(s, (size + 1) | MO_ALIGN);
+ memop = check_atomic_align(s, rn, size + 1);
clean_addr = gen_mte_check1(s, cpu_reg_sp(s, rn), true, rn != 31, memop);
if (size == 2) {
@@ -2678,8 +2747,7 @@ static void disas_ldst_excl(DisasContext *s, uint32_t insn)
gen_check_sp_alignment(s);
}
tcg_gen_mb(TCG_MO_ALL | TCG_BAR_STRL);
- /* TODO: ARMv8.4-LSE SCTLR.nAA */
- memop = finalize_memop(s, size | MO_ALIGN);
+ memop = check_ordered_align(s, rn, 0, true, size);
clean_addr = gen_mte_check1(s, cpu_reg_sp(s, rn),
true, rn != 31, memop);
do_gpr_st(s, cpu_reg(s, rt), clean_addr, memop, true, rt,
@@ -2697,8 +2765,7 @@ static void disas_ldst_excl(DisasContext *s, uint32_t insn)
if (rn == 31) {
gen_check_sp_alignment(s);
}
- /* TODO: ARMv8.4-LSE SCTLR.nAA */
- memop = finalize_memop(s, size | MO_ALIGN);
+ memop = check_ordered_align(s, rn, 0, false, size);
clean_addr = gen_mte_check1(s, cpu_reg_sp(s, rn),
false, rn != 31, memop);
do_gpr_ld(s, cpu_reg(s, rt), clean_addr, memop, false, true,
@@ -3379,7 +3446,7 @@ static void disas_ldst_atomic(DisasContext *s, uint32_t insn,
bool a = extract32(insn, 23, 1);
TCGv_i64 tcg_rs, tcg_rt, clean_addr;
AtomicThreeOpFn *fn = NULL;
- MemOp mop = finalize_memop(s, size | MO_ALIGN);
+ MemOp mop = size;
if (is_vector || !dc_isar_feature(aa64_atomics, s)) {
unallocated_encoding(s);
@@ -3430,6 +3497,8 @@ static void disas_ldst_atomic(DisasContext *s, uint32_t insn,
if (rn == 31) {
gen_check_sp_alignment(s);
}
+
+ mop = check_atomic_align(s, rn, mop);
clean_addr = gen_mte_check1(s, cpu_reg_sp(s, rn), false, rn != 31, mop);
if (o3_opc == 014) {
@@ -3554,16 +3623,13 @@ static void disas_ldst_ldapr_stlr(DisasContext *s, uint32_t insn)
bool is_store = false;
bool extend = false;
bool iss_sf;
- MemOp mop;
+ MemOp mop = size;
if (!dc_isar_feature(aa64_rcpc_8_4, s)) {
unallocated_encoding(s);
return;
}
- /* TODO: ARMv8.4-LSE SCTLR.nAA */
- mop = finalize_memop(s, size | MO_ALIGN);
-
switch (opc) {
case 0: /* STLURB */
is_store = true;
@@ -3595,6 +3661,8 @@ static void disas_ldst_ldapr_stlr(DisasContext *s, uint32_t insn)
gen_check_sp_alignment(s);
}
+ mop = check_ordered_align(s, rn, offset, is_store, mop);
+
dirty_addr = read_cpu_reg_sp(s, rn, 1);
tcg_gen_addi_i64(dirty_addr, dirty_addr, offset);
clean_addr = clean_data_tbi(s, dirty_addr);
--
2.34.1
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v3 17/20] target/arm: Move mte check for store-exclusive
2023-05-30 19:14 [PATCH v3 00/20] target/arm: Implement FEAT_LSE2 Richard Henderson
` (15 preceding siblings ...)
2023-05-30 19:14 ` [PATCH v3 16/20] target/arm: Relax ordered/atomic alignment checks for LSE2 Richard Henderson
@ 2023-05-30 19:14 ` Richard Henderson
2023-05-30 19:14 ` [PATCH v3 18/20] tests/tcg/aarch64: Use stz2g in mte-7.c Richard Henderson
` (3 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Richard Henderson @ 2023-05-30 19:14 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
Push the mte check behind the exclusive_addr check.
Document the several ways that we are still out of spec
with this implementation.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/arm/tcg/translate-a64.c | 42 +++++++++++++++++++++++++++++-----
1 file changed, 36 insertions(+), 6 deletions(-)
diff --git a/target/arm/tcg/translate-a64.c b/target/arm/tcg/translate-a64.c
index 49cb7a7dd5..9654c5746a 100644
--- a/target/arm/tcg/translate-a64.c
+++ b/target/arm/tcg/translate-a64.c
@@ -2524,17 +2524,47 @@ static void gen_store_exclusive(DisasContext *s, int rd, int rt, int rt2,
*/
TCGLabel *fail_label = gen_new_label();
TCGLabel *done_label = gen_new_label();
- TCGv_i64 tmp, dirty_addr, clean_addr;
+ TCGv_i64 tmp, clean_addr;
MemOp memop;
- memop = (size + is_pair) | MO_ALIGN;
- memop = finalize_memop(s, memop);
-
- dirty_addr = cpu_reg_sp(s, rn);
- clean_addr = gen_mte_check1(s, dirty_addr, true, rn != 31, memop);
+ /*
+ * FIXME: We are out of spec here. We have recorded only the address
+ * from load_exclusive, not the entire range, and we assume that the
+ * size of the access on both sides match. The architecture allows the
+ * store to be smaller than the load, so long as the stored bytes are
+ * within the range recorded by the load.
+ */
+ /* See AArch64.ExclusiveMonitorsPass() and AArch64.IsExclusiveVA(). */
+ clean_addr = clean_data_tbi(s, cpu_reg_sp(s, rn));
tcg_gen_brcond_i64(TCG_COND_NE, clean_addr, cpu_exclusive_addr, fail_label);
+ /*
+ * The write, and any associated faults, only happen if the virtual
+ * and physical addresses pass the exclusive monitor check. These
+ * faults are exceedingly unlikely, because normally the guest uses
+ * the exact same address register for the load_exclusive, and we
+ * would have recognized these faults there.
+ *
+ * It is possible to trigger an alignment fault pre-LSE2, e.g. with an
+ * unaligned 4-byte write within the range of an aligned 8-byte load.
+ * With LSE2, the store would need to cross a 16-byte boundary when the
+ * load did not, which would mean the store is outside the range
+ * recorded for the monitor, which would have failed a corrected monitor
+ * check above. For now, we assume no size change and retain the
+ * MO_ALIGN to let tcg know what we checked in the load_exclusive.
+ *
+ * It is possible to trigger an MTE fault, by performing the load with
+ * a virtual address with a valid tag and performing the store with the
+ * same virtual address and a different invalid tag.
+ */
+ memop = size + is_pair;
+ if (memop == MO_128 || !dc_isar_feature(aa64_lse2, s)) {
+ memop |= MO_ALIGN;
+ }
+ memop = finalize_memop(s, memop);
+ gen_mte_check1(s, cpu_reg_sp(s, rn), true, rn != 31, memop);
+
tmp = tcg_temp_new_i64();
if (is_pair) {
if (size == 2) {
--
2.34.1
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v3 18/20] tests/tcg/aarch64: Use stz2g in mte-7.c
2023-05-30 19:14 [PATCH v3 00/20] target/arm: Implement FEAT_LSE2 Richard Henderson
` (16 preceding siblings ...)
2023-05-30 19:14 ` [PATCH v3 17/20] target/arm: Move mte check for store-exclusive Richard Henderson
@ 2023-05-30 19:14 ` Richard Henderson
2023-05-30 19:14 ` [PATCH v3 19/20] tests/tcg/multiarch: Adjust sigbus.c Richard Henderson
` (2 subsequent siblings)
20 siblings, 0 replies; 22+ messages in thread
From: Richard Henderson @ 2023-05-30 19:14 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
We have many other instances of stg in the testsuite;
change these to provide an instance of stz2g.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
tests/tcg/aarch64/mte-7.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
diff --git a/tests/tcg/aarch64/mte-7.c b/tests/tcg/aarch64/mte-7.c
index a981de62d4..04974f9ebb 100644
--- a/tests/tcg/aarch64/mte-7.c
+++ b/tests/tcg/aarch64/mte-7.c
@@ -19,8 +19,7 @@ int main(int ac, char **av)
p = (void *)((unsigned long)p | (1ul << 56));
/* Store tag in sequential granules. */
- asm("stg %0, [%0]" : : "r"(p + 0x0ff0));
- asm("stg %0, [%0]" : : "r"(p + 0x1000));
+ asm("stz2g %0, [%0]" : : "r"(p + 0x0ff0));
/*
* Perform an unaligned store with tag 1 crossing the pages.
--
2.34.1
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v3 19/20] tests/tcg/multiarch: Adjust sigbus.c
2023-05-30 19:14 [PATCH v3 00/20] target/arm: Implement FEAT_LSE2 Richard Henderson
` (17 preceding siblings ...)
2023-05-30 19:14 ` [PATCH v3 18/20] tests/tcg/aarch64: Use stz2g in mte-7.c Richard Henderson
@ 2023-05-30 19:14 ` Richard Henderson
2023-05-30 19:14 ` [PATCH v3 20/20] target/arm: Enable FEAT_LSE2 for -cpu max Richard Henderson
2023-06-05 15:56 ` [PATCH v3 00/20] target/arm: Implement FEAT_LSE2 Peter Maydell
20 siblings, 0 replies; 22+ messages in thread
From: Richard Henderson @ 2023-05-30 19:14 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
With -cpu max and FEAT_LSE2, the __aarch64__ section will only raise
an alignment exception when the load crosses a 16-byte boundary.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
tests/tcg/multiarch/sigbus.c | 13 +++++++++----
1 file changed, 9 insertions(+), 4 deletions(-)
diff --git a/tests/tcg/multiarch/sigbus.c b/tests/tcg/multiarch/sigbus.c
index 8134c5fd56..f47c7390e7 100644
--- a/tests/tcg/multiarch/sigbus.c
+++ b/tests/tcg/multiarch/sigbus.c
@@ -6,8 +6,13 @@
#include <endian.h>
-unsigned long long x = 0x8877665544332211ull;
-void * volatile p = (void *)&x + 1;
+char x[32] __attribute__((aligned(16))) = {
+ 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x08,
+ 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, 0x10,
+ 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
+ 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, 0x20,
+};
+void * volatile p = (void *)&x + 15;
void sigbus(int sig, siginfo_t *info, void *uc)
{
@@ -60,9 +65,9 @@ int main()
* We might as well validate the unaligned load worked.
*/
if (BYTE_ORDER == LITTLE_ENDIAN) {
- assert(tmp == 0x55443322);
+ assert(tmp == 0x13121110);
} else {
- assert(tmp == 0x77665544);
+ assert(tmp == 0x10111213);
}
return EXIT_SUCCESS;
}
--
2.34.1
^ permalink raw reply related [flat|nested] 22+ messages in thread* [PATCH v3 20/20] target/arm: Enable FEAT_LSE2 for -cpu max
2023-05-30 19:14 [PATCH v3 00/20] target/arm: Implement FEAT_LSE2 Richard Henderson
` (18 preceding siblings ...)
2023-05-30 19:14 ` [PATCH v3 19/20] tests/tcg/multiarch: Adjust sigbus.c Richard Henderson
@ 2023-05-30 19:14 ` Richard Henderson
2023-06-05 15:56 ` [PATCH v3 00/20] target/arm: Implement FEAT_LSE2 Peter Maydell
20 siblings, 0 replies; 22+ messages in thread
From: Richard Henderson @ 2023-05-30 19:14 UTC (permalink / raw)
To: qemu-devel; +Cc: qemu-arm, Peter Maydell
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
docs/system/arm/emulation.rst | 1 +
target/arm/tcg/cpu64.c | 1 +
2 files changed, 2 insertions(+)
diff --git a/docs/system/arm/emulation.rst b/docs/system/arm/emulation.rst
index 7338987875..ecbbd63adf 100644
--- a/docs/system/arm/emulation.rst
+++ b/docs/system/arm/emulation.rst
@@ -50,6 +50,7 @@ the following architecture extensions:
- FEAT_LRCPC (Load-acquire RCpc instructions)
- FEAT_LRCPC2 (Load-acquire RCpc instructions v2)
- FEAT_LSE (Large System Extensions)
+- FEAT_LSE2 (Large System Extensions v2)
- FEAT_LVA (Large Virtual Address space)
- FEAT_MTE (Memory Tagging Extension)
- FEAT_MTE2 (Memory Tagging Extension)
diff --git a/target/arm/tcg/cpu64.c b/target/arm/tcg/cpu64.c
index 886674a443..2976f94ae4 100644
--- a/target/arm/tcg/cpu64.c
+++ b/target/arm/tcg/cpu64.c
@@ -644,6 +644,7 @@ void aarch64_max_tcg_initfn(Object *obj)
t = FIELD_DP64(t, ID_AA64MMFR2, IESB, 1); /* FEAT_IESB */
t = FIELD_DP64(t, ID_AA64MMFR2, VARANGE, 1); /* FEAT_LVA */
t = FIELD_DP64(t, ID_AA64MMFR2, ST, 1); /* FEAT_TTST */
+ t = FIELD_DP64(t, ID_AA64MMFR2, AT, 1); /* FEAT_LSE2 */
t = FIELD_DP64(t, ID_AA64MMFR2, IDS, 1); /* FEAT_IDST */
t = FIELD_DP64(t, ID_AA64MMFR2, FWB, 1); /* FEAT_S2FWB */
t = FIELD_DP64(t, ID_AA64MMFR2, TTL, 1); /* FEAT_TTL */
--
2.34.1
^ permalink raw reply related [flat|nested] 22+ messages in thread* Re: [PATCH v3 00/20] target/arm: Implement FEAT_LSE2
2023-05-30 19:14 [PATCH v3 00/20] target/arm: Implement FEAT_LSE2 Richard Henderson
` (19 preceding siblings ...)
2023-05-30 19:14 ` [PATCH v3 20/20] target/arm: Enable FEAT_LSE2 for -cpu max Richard Henderson
@ 2023-06-05 15:56 ` Peter Maydell
20 siblings, 0 replies; 22+ messages in thread
From: Peter Maydell @ 2023-06-05 15:56 UTC (permalink / raw)
To: Richard Henderson; +Cc: qemu-devel, qemu-arm
On Tue, 30 May 2023 at 20:20, Richard Henderson
<richard.henderson@linaro.org> wrote:
>
> All prerequisites are upstream. There are still outstanding patches
> to improve the atomic16 support, but those are all optimizations.
>
> Patches needing r-b:
> 16-target-arm-Relax-ordered-atomic-alignment-checks-.patch
Applied to target-arm.next, thanks.
-- PMM
^ permalink raw reply [flat|nested] 22+ messages in thread