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-rw-r--r--drivers/hwtracing/coresight/coresight-etm4x-core.c55
-rw-r--r--drivers/hwtracing/coresight/coresight-etm4x-sysfs.c10
-rw-r--r--drivers/hwtracing/coresight/coresight-etm4x.h2
-rw-r--r--drivers/hwtracing/coresight/coresight-priv.h3
-rw-r--r--drivers/hwtracing/coresight/coresight-self-hosted-trace.h9
-rw-r--r--drivers/hwtracing/coresight/coresight-trbe.c15
6 files changed, 68 insertions, 26 deletions
diff --git a/drivers/hwtracing/coresight/coresight-etm4x-core.c b/drivers/hwtracing/coresight/coresight-etm4x-core.c
index dd8c74f893db..2c1a60577728 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x-core.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x-core.c
@@ -6,6 +6,7 @@
#include <linux/acpi.h>
#include <linux/bitops.h>
#include <linux/kernel.h>
+#include <linux/kvm_host.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/types.h>
@@ -268,10 +269,28 @@ struct etm4_enable_arg {
*/
static void etm4x_prohibit_trace(struct etmv4_drvdata *drvdata)
{
+ u64 trfcr;
+
/* If the CPU doesn't support FEAT_TRF, nothing to do */
if (!drvdata->trfcr)
return;
- cpu_prohibit_trace();
+
+ trfcr = drvdata->trfcr & ~(TRFCR_EL1_ExTRE | TRFCR_EL1_E0TRE);
+
+ write_trfcr(trfcr);
+ kvm_tracing_set_el1_configuration(trfcr);
+}
+
+static u64 etm4x_get_kern_user_filter(struct etmv4_drvdata *drvdata)
+{
+ u64 trfcr = drvdata->trfcr;
+
+ if (drvdata->config.mode & ETM_MODE_EXCL_KERN)
+ trfcr &= ~TRFCR_EL1_ExTRE;
+ if (drvdata->config.mode & ETM_MODE_EXCL_USER)
+ trfcr &= ~TRFCR_EL1_E0TRE;
+
+ return trfcr;
}
/*
@@ -286,18 +305,28 @@ static void etm4x_prohibit_trace(struct etmv4_drvdata *drvdata)
*/
static void etm4x_allow_trace(struct etmv4_drvdata *drvdata)
{
- u64 trfcr = drvdata->trfcr;
+ u64 trfcr, guest_trfcr;
/* If the CPU doesn't support FEAT_TRF, nothing to do */
- if (!trfcr)
+ if (!drvdata->trfcr)
return;
- if (drvdata->config.mode & ETM_MODE_EXCL_KERN)
- trfcr &= ~TRFCR_ELx_ExTRE;
- if (drvdata->config.mode & ETM_MODE_EXCL_USER)
- trfcr &= ~TRFCR_ELx_E0TRE;
+ if (drvdata->config.mode & ETM_MODE_EXCL_HOST)
+ trfcr = drvdata->trfcr & ~(TRFCR_EL1_ExTRE | TRFCR_EL1_E0TRE);
+ else
+ trfcr = etm4x_get_kern_user_filter(drvdata);
write_trfcr(trfcr);
+
+ /* Set filters for guests and pass to KVM */
+ if (drvdata->config.mode & ETM_MODE_EXCL_GUEST)
+ guest_trfcr = drvdata->trfcr & ~(TRFCR_EL1_ExTRE | TRFCR_EL1_E0TRE);
+ else
+ guest_trfcr = etm4x_get_kern_user_filter(drvdata);
+
+ /* TRFCR_EL1 doesn't have CX so mask it out. */
+ guest_trfcr &= ~TRFCR_EL2_CX;
+ kvm_tracing_set_el1_configuration(guest_trfcr);
}
#ifdef CONFIG_ETM4X_IMPDEF_FEATURE
@@ -655,6 +684,12 @@ static int etm4_parse_event_config(struct coresight_device *csdev,
if (attr->exclude_user)
config->mode = ETM_MODE_EXCL_USER;
+ if (attr->exclude_host)
+ config->mode |= ETM_MODE_EXCL_HOST;
+
+ if (attr->exclude_guest)
+ config->mode |= ETM_MODE_EXCL_GUEST;
+
/* Always start from the default config */
etm4_set_default_config(config);
@@ -1141,9 +1176,9 @@ static void cpu_detect_trace_filtering(struct etmv4_drvdata *drvdata)
* tracing at the kernel EL and EL0, forcing to use the
* virtual time as the timestamp.
*/
- trfcr = (TRFCR_ELx_TS_VIRTUAL |
- TRFCR_ELx_ExTRE |
- TRFCR_ELx_E0TRE);
+ trfcr = (TRFCR_EL1_TS_VIRTUAL |
+ TRFCR_EL1_ExTRE |
+ TRFCR_EL1_E0TRE);
/* If we are running at EL2, allow tracing the CONTEXTIDR_EL2. */
if (is_kernel_in_hyp_mode())
diff --git a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c
index a9f19629f3f8..c767f8ae4cf1 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c
+++ b/drivers/hwtracing/coresight/coresight-etm4x-sysfs.c
@@ -2319,11 +2319,11 @@ static ssize_t ts_source_show(struct device *dev,
goto out;
}
- switch (drvdata->trfcr & TRFCR_ELx_TS_MASK) {
- case TRFCR_ELx_TS_VIRTUAL:
- case TRFCR_ELx_TS_GUEST_PHYSICAL:
- case TRFCR_ELx_TS_PHYSICAL:
- val = FIELD_GET(TRFCR_ELx_TS_MASK, drvdata->trfcr);
+ switch (drvdata->trfcr & TRFCR_EL1_TS_MASK) {
+ case TRFCR_EL1_TS_VIRTUAL:
+ case TRFCR_EL1_TS_GUEST_PHYSICAL:
+ case TRFCR_EL1_TS_PHYSICAL:
+ val = FIELD_GET(TRFCR_EL1_TS_MASK, drvdata->trfcr);
break;
default:
val = -1;
diff --git a/drivers/hwtracing/coresight/coresight-etm4x.h b/drivers/hwtracing/coresight/coresight-etm4x.h
index 9e9165f62e81..1119762b5cec 100644
--- a/drivers/hwtracing/coresight/coresight-etm4x.h
+++ b/drivers/hwtracing/coresight/coresight-etm4x.h
@@ -817,7 +817,7 @@ enum etm_impdef_type {
* @s_ex_level: Secure ELs where tracing is supported.
*/
struct etmv4_config {
- u32 mode;
+ u64 mode;
u32 pe_sel;
u32 cfg;
u32 eventctrl0;
diff --git a/drivers/hwtracing/coresight/coresight-priv.h b/drivers/hwtracing/coresight/coresight-priv.h
index 05f891ca6b5c..76403530f33e 100644
--- a/drivers/hwtracing/coresight/coresight-priv.h
+++ b/drivers/hwtracing/coresight/coresight-priv.h
@@ -42,6 +42,9 @@ extern const struct device_type coresight_dev_type[];
#define ETM_MODE_EXCL_KERN BIT(30)
#define ETM_MODE_EXCL_USER BIT(31)
+#define ETM_MODE_EXCL_HOST BIT(32)
+#define ETM_MODE_EXCL_GUEST BIT(33)
+
struct cs_pair_attribute {
struct device_attribute attr;
u32 lo_off;
diff --git a/drivers/hwtracing/coresight/coresight-self-hosted-trace.h b/drivers/hwtracing/coresight/coresight-self-hosted-trace.h
index 53840a2c41f2..303d71911870 100644
--- a/drivers/hwtracing/coresight/coresight-self-hosted-trace.h
+++ b/drivers/hwtracing/coresight/coresight-self-hosted-trace.h
@@ -21,13 +21,4 @@ static inline void write_trfcr(u64 val)
isb();
}
-static inline u64 cpu_prohibit_trace(void)
-{
- u64 trfcr = read_trfcr();
-
- /* Prohibit tracing at EL0 & the kernel EL */
- write_trfcr(trfcr & ~(TRFCR_ELx_ExTRE | TRFCR_ELx_E0TRE));
- /* Return the original value of the TRFCR */
- return trfcr;
-}
#endif /* __CORESIGHT_SELF_HOSTED_TRACE_H */
diff --git a/drivers/hwtracing/coresight/coresight-trbe.c b/drivers/hwtracing/coresight/coresight-trbe.c
index 919804b12a67..fff67aac8418 100644
--- a/drivers/hwtracing/coresight/coresight-trbe.c
+++ b/drivers/hwtracing/coresight/coresight-trbe.c
@@ -17,6 +17,7 @@
#include <asm/barrier.h>
#include <asm/cpufeature.h>
+#include <linux/kvm_host.h>
#include <linux/vmalloc.h>
#include "coresight-self-hosted-trace.h"
@@ -221,6 +222,7 @@ static inline void set_trbe_enabled(struct trbe_cpudata *cpudata, u64 trblimitr)
*/
trblimitr |= TRBLIMITR_EL1_E;
write_sysreg_s(trblimitr, SYS_TRBLIMITR_EL1);
+ kvm_enable_trbe();
/* Synchronize the TRBE enable event */
isb();
@@ -239,6 +241,7 @@ static inline void set_trbe_disabled(struct trbe_cpudata *cpudata)
*/
trblimitr &= ~TRBLIMITR_EL1_E;
write_sysreg_s(trblimitr, SYS_TRBLIMITR_EL1);
+ kvm_disable_trbe();
if (trbe_needs_drain_after_disable(cpudata))
trbe_drain_buffer();
@@ -253,8 +256,8 @@ static void trbe_drain_and_disable_local(struct trbe_cpudata *cpudata)
static void trbe_reset_local(struct trbe_cpudata *cpudata)
{
- trbe_drain_and_disable_local(cpudata);
write_sysreg_s(0, SYS_TRBLIMITR_EL1);
+ trbe_drain_buffer();
write_sysreg_s(0, SYS_TRBPTR_EL1);
write_sysreg_s(0, SYS_TRBBASER_EL1);
write_sysreg_s(0, SYS_TRBSR_EL1);
@@ -1110,6 +1113,16 @@ static bool is_perf_trbe(struct perf_output_handle *handle)
return true;
}
+static u64 cpu_prohibit_trace(void)
+{
+ u64 trfcr = read_trfcr();
+
+ /* Prohibit tracing at EL0 & the kernel EL */
+ write_trfcr(trfcr & ~(TRFCR_EL1_ExTRE | TRFCR_EL1_E0TRE));
+ /* Return the original value of the TRFCR */
+ return trfcr;
+}
+
static irqreturn_t arm_trbe_irq_handler(int irq, void *dev)
{
struct perf_output_handle **handle_ptr = dev;
generated by cgit v1.2.3 (git 2.46.0) at 2025-12-09 19:57:03 +0000