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From: Atish Patra <atish.patra@wdc.com>
To: qemu-devel@nongnu.org
Cc: Atish Patra <atish.patra@wdc.com>,
	Bin Meng <bin.meng@windriver.com>,
	Alistair Francis <alistair.francis@wdc.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	qemu-riscv@nongnu.org
Subject: [ RFC v2 8/9] target/riscv: Add few cache related PMU events
Date: Thu,  9 Sep 2021 13:26:38 -0700	[thread overview]
Message-ID: <20210909202639.1230170-9-atish.patra@wdc.com> (raw)
In-Reply-To: <20210909202639.1230170-1-atish.patra@wdc.com>

Qemu can monitor the following cache related PMU events through
tlb_fill functions.

1. DTLB load/store miss
3. ITLB prefetch miss

Increment the PMU counter in tlb_fill function.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
---
 target/riscv/cpu_helper.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
index 968cb8046f49..c86250e1aada 100644
--- a/target/riscv/cpu_helper.c
+++ b/target/riscv/cpu_helper.c
@@ -21,10 +21,13 @@
 #include "qemu/log.h"
 #include "qemu/main-loop.h"
 #include "cpu.h"
+#include "pmu.h"
 #include "exec/exec-all.h"
 #include "tcg/tcg-op.h"
 #include "trace.h"
 #include "semihosting/common-semi.h"
+#include "cpu.h"
+#include "cpu_bits.h"
 
 int riscv_cpu_mmu_index(CPURISCVState *env, bool ifetch)
 {
@@ -754,6 +757,28 @@ void riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
 }
 #endif /* !CONFIG_USER_ONLY */
 
+
+static void pmu_tlb_fill_incr_ctr(RISCVCPU *cpu, MMUAccessType access_type)
+{
+    enum riscv_pmu_event_idx pmu_event_type;
+
+    switch (access_type) {
+    case MMU_INST_FETCH:
+        pmu_event_type = RISCV_PMU_EVENT_CACHE_ITLB_PREFETCH_MISS;
+        break;
+    case MMU_DATA_LOAD:
+        pmu_event_type = RISCV_PMU_EVENT_CACHE_DTLB_READ_MISS;
+        break;
+    case MMU_DATA_STORE:
+        pmu_event_type = RISCV_PMU_EVENT_CACHE_DTLB_WRITE_MISS;
+        break;
+    default:
+        return;
+    }
+
+    riscv_pmu_incr_ctr(cpu, pmu_event_type);
+}
+
 bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
                         MMUAccessType access_type, int mmu_idx,
                         bool probe, uintptr_t retaddr)
@@ -851,6 +876,7 @@ bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
             }
         }
     } else {
+        pmu_tlb_fill_incr_ctr(cpu, access_type);
         /* Single stage lookup */
         ret = get_physical_address(env, &pa, &prot, address, NULL,
                                    access_type, mmu_idx, true, false, false);
-- 
2.31.1



WARNING: multiple messages have this Message-ID (diff)
From: Atish Patra <atish.patra@wdc.com>
To: qemu-devel@nongnu.org
Cc: Atish Patra <atish.patra@wdc.com>,
	Alistair Francis <alistair.francis@wdc.com>,
	Bin Meng <bin.meng@windriver.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	qemu-riscv@nongnu.org
Subject: [ RFC v2 8/9] target/riscv: Add few cache related PMU events
Date: Thu,  9 Sep 2021 13:26:38 -0700	[thread overview]
Message-ID: <20210909202639.1230170-9-atish.patra@wdc.com> (raw)
In-Reply-To: <20210909202639.1230170-1-atish.patra@wdc.com>

Qemu can monitor the following cache related PMU events through
tlb_fill functions.

1. DTLB load/store miss
3. ITLB prefetch miss

Increment the PMU counter in tlb_fill function.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
---
 target/riscv/cpu_helper.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/target/riscv/cpu_helper.c b/target/riscv/cpu_helper.c
index 968cb8046f49..c86250e1aada 100644
--- a/target/riscv/cpu_helper.c
+++ b/target/riscv/cpu_helper.c
@@ -21,10 +21,13 @@
 #include "qemu/log.h"
 #include "qemu/main-loop.h"
 #include "cpu.h"
+#include "pmu.h"
 #include "exec/exec-all.h"
 #include "tcg/tcg-op.h"
 #include "trace.h"
 #include "semihosting/common-semi.h"
+#include "cpu.h"
+#include "cpu_bits.h"
 
 int riscv_cpu_mmu_index(CPURISCVState *env, bool ifetch)
 {
@@ -754,6 +757,28 @@ void riscv_cpu_do_unaligned_access(CPUState *cs, vaddr addr,
 }
 #endif /* !CONFIG_USER_ONLY */
 
+
+static void pmu_tlb_fill_incr_ctr(RISCVCPU *cpu, MMUAccessType access_type)
+{
+    enum riscv_pmu_event_idx pmu_event_type;
+
+    switch (access_type) {
+    case MMU_INST_FETCH:
+        pmu_event_type = RISCV_PMU_EVENT_CACHE_ITLB_PREFETCH_MISS;
+        break;
+    case MMU_DATA_LOAD:
+        pmu_event_type = RISCV_PMU_EVENT_CACHE_DTLB_READ_MISS;
+        break;
+    case MMU_DATA_STORE:
+        pmu_event_type = RISCV_PMU_EVENT_CACHE_DTLB_WRITE_MISS;
+        break;
+    default:
+        return;
+    }
+
+    riscv_pmu_incr_ctr(cpu, pmu_event_type);
+}
+
 bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
                         MMUAccessType access_type, int mmu_idx,
                         bool probe, uintptr_t retaddr)
@@ -851,6 +876,7 @@ bool riscv_cpu_tlb_fill(CPUState *cs, vaddr address, int size,
             }
         }
     } else {
+        pmu_tlb_fill_incr_ctr(cpu, access_type);
         /* Single stage lookup */
         ret = get_physical_address(env, &pa, &prot, address, NULL,
                                    access_type, mmu_idx, true, false, false);
-- 
2.31.1



  parent reply	other threads:[~2021-09-09 20:30 UTC|newest]

Thread overview: 36+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-09 20:26 [ RFC v2 0/9] Improve PMU support Atish Patra
2021-09-09 20:26 ` Atish Patra
2021-09-09 20:26 ` [ RFC v2 1/9] target/riscv: Fix PMU CSR predicate function Atish Patra
2021-09-09 20:26   ` Atish Patra
2021-09-15 14:49   ` Bin Meng
2021-09-15 14:49     ` Bin Meng
2021-09-16 18:39     ` Atish Patra
2021-09-16 18:39       ` Atish Patra
2021-09-09 20:26 ` [ RFC v2 2/9] target/riscv: pmu: Rename the counters extension to pmu Atish Patra
2021-09-09 20:26   ` Atish Patra
2021-09-15 14:49   ` Bin Meng
2021-09-15 14:49     ` Bin Meng
2021-09-16  4:49   ` Alistair Francis
2021-09-16  4:49     ` Alistair Francis
2021-09-09 20:26 ` [ RFC v2 3/9] target/riscv: pmu: Make number of counters configurable Atish Patra
2021-09-09 20:26   ` Atish Patra
2021-09-15 14:49   ` Bin Meng
2021-09-15 14:49     ` Bin Meng
2021-09-16 18:52     ` Atish Patra
2021-09-16 18:52       ` Atish Patra
2021-09-09 20:26 ` [ RFC v2 4/9] target/riscv: Implement mcountinhibit CSR Atish Patra
2021-09-09 20:26   ` Atish Patra
2021-09-15 14:49   ` Bin Meng
2021-09-15 14:49     ` Bin Meng
2021-09-16 18:47     ` Atish Patra
2021-09-16 18:47       ` Atish Patra
2021-09-09 20:26 ` [ RFC v2 5/9] target/riscv: Add support for hpmcounters/hpmevents Atish Patra
2021-09-09 20:26   ` Atish Patra
2021-09-09 20:26 ` [ RFC v2 6/9] target/riscv: Support mcycle/minstret write operation Atish Patra
2021-09-09 20:26   ` Atish Patra
2021-09-09 20:26 ` [ RFC v2 7/9] target/riscv: Add sscofpmf extension support Atish Patra
2021-09-09 20:26   ` Atish Patra
2021-09-09 20:26 ` Atish Patra [this message]
2021-09-09 20:26   ` [ RFC v2 8/9] target/riscv: Add few cache related PMU events Atish Patra
2021-09-09 20:26 ` [ RFC v2 9/9] hw/riscv: virt: Add PMU DT node to the device tree Atish Patra
2021-09-09 20:26   ` Atish Patra

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