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Message-ID: <tip-1650dfd1a9bcde8fcfaab776887bb6f4e91830c3@git.kernel.org>
Date: Thu, 30 Mar 2017 01:37:28 -0700
From: tip-bot for Suravee Suthikulpanit <tipbot@...or.com>
To: linux-tip-commits@...r.kernel.org
Cc: acme@...hat.com, alexander.shishkin@...ux.intel.com,
vincent.weaver@...ne.edu, tglx@...utronix.de, mingo@...nel.org,
jolsa@...hat.com, suravee.suthikulpanit@....com,
torvalds@...ux-foundation.org, linux-kernel@...r.kernel.org,
eranian@...gle.com, bp@...e.de, peterz@...radead.org,
Suravee.Suthikulpanit@....com, joro@...tes.org, hpa@...or.com
Subject: [tip:perf/core] x86/events, drivers/amd/iommu: Prepare for multiple
IOMMUs support
Commit-ID: 1650dfd1a9bcde8fcfaab776887bb6f4e91830c3
Gitweb: http://git.kernel.org/tip/1650dfd1a9bcde8fcfaab776887bb6f4e91830c3
Author: Suravee Suthikulpanit <suravee.suthikulpanit@....com>
AuthorDate: Fri, 24 Feb 2017 02:48:19 -0600
Committer: Ingo Molnar <mingo@...nel.org>
CommitDate: Thu, 30 Mar 2017 09:53:55 +0200
x86/events, drivers/amd/iommu: Prepare for multiple IOMMUs support
Currently, amd_iommu_pc_get_set_reg_val() cannot support multiple
IOMMUs. Modify it to allow callers to specify an IOMMU. This is in
preparation for supporting multiple IOMMUs.
Signed-off-by: Suravee Suthikulpanit <Suravee.Suthikulpanit@....com>
Signed-off-by: Borislav Petkov <bp@...e.de>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Arnaldo Carvalho de Melo <acme@...hat.com>
Cc: Jiri Olsa <jolsa@...hat.com>
Cc: Jörg Rödel <joro@...tes.org>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Stephane Eranian <eranian@...gle.com>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Vince Weaver <vincent.weaver@...ne.edu>
Cc: iommu@...ts.linux-foundation.org
Link: http://lkml.kernel.org/r/1487926102-13073-8-git-send-email-Suravee.Suthikulpanit@amd.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
arch/x86/events/amd/iommu.c | 38 ++++++++++++++++--------------------
arch/x86/events/amd/iommu.h | 9 +++++++--
drivers/iommu/amd_iommu_init.c | 43 +++++++++++++++++++++++------------------
drivers/iommu/amd_iommu_proto.h | 5 -----
4 files changed, 48 insertions(+), 47 deletions(-)
diff --git a/arch/x86/events/amd/iommu.c b/arch/x86/events/amd/iommu.c
index 10f67d3..88fbc80 100644
--- a/arch/x86/events/amd/iommu.c
+++ b/arch/x86/events/amd/iommu.c
@@ -248,49 +248,45 @@ static int perf_iommu_event_init(struct perf_event *event)
static void perf_iommu_enable_event(struct perf_event *ev)
{
+ struct amd_iommu *iommu = get_amd_iommu(0);
u8 csource = _GET_CSOURCE(ev);
u16 devid = _GET_DEVID(ev);
+ u8 bank = _GET_BANK(ev);
+ u8 cntr = _GET_CNTR(ev);
u64 reg = 0ULL;
reg = csource;
- amd_iommu_pc_get_set_reg_val(devid,
- _GET_BANK(ev), _GET_CNTR(ev) ,
- IOMMU_PC_COUNTER_SRC_REG, ®, true);
+ amd_iommu_pc_set_reg(iommu, bank, cntr, IOMMU_PC_COUNTER_SRC_REG, ®);
reg = devid | (_GET_DEVID_MASK(ev) << 32);
if (reg)
reg |= BIT(31);
- amd_iommu_pc_get_set_reg_val(devid,
- _GET_BANK(ev), _GET_CNTR(ev) ,
- IOMMU_PC_DEVID_MATCH_REG, ®, true);
+ amd_iommu_pc_set_reg(iommu, bank, cntr, IOMMU_PC_DEVID_MATCH_REG, ®);
reg = _GET_PASID(ev) | (_GET_PASID_MASK(ev) << 32);
if (reg)
reg |= BIT(31);
- amd_iommu_pc_get_set_reg_val(devid,
- _GET_BANK(ev), _GET_CNTR(ev) ,
- IOMMU_PC_PASID_MATCH_REG, ®, true);
+ amd_iommu_pc_set_reg(iommu, bank, cntr, IOMMU_PC_PASID_MATCH_REG, ®);
reg = _GET_DOMID(ev) | (_GET_DOMID_MASK(ev) << 32);
if (reg)
reg |= BIT(31);
- amd_iommu_pc_get_set_reg_val(devid,
- _GET_BANK(ev), _GET_CNTR(ev) ,
- IOMMU_PC_DOMID_MATCH_REG, ®, true);
+ amd_iommu_pc_set_reg(iommu, bank, cntr, IOMMU_PC_DOMID_MATCH_REG, ®);
}
static void perf_iommu_disable_event(struct perf_event *event)
{
+ struct amd_iommu *iommu = get_amd_iommu(0);
u64 reg = 0ULL;
- amd_iommu_pc_get_set_reg_val(_GET_DEVID(event),
- _GET_BANK(event), _GET_CNTR(event),
- IOMMU_PC_COUNTER_SRC_REG, ®, true);
+ amd_iommu_pc_set_reg(iommu, _GET_BANK(event), _GET_CNTR(event),
+ IOMMU_PC_COUNTER_SRC_REG, ®);
}
static void perf_iommu_start(struct perf_event *event, int flags)
{
struct hw_perf_event *hwc = &event->hw;
+ struct amd_iommu *iommu = get_amd_iommu(0);
if (WARN_ON_ONCE(!(hwc->state & PERF_HES_STOPPED)))
return;
@@ -300,9 +296,8 @@ static void perf_iommu_start(struct perf_event *event, int flags)
if (flags & PERF_EF_RELOAD) {
u64 prev_raw_count = local64_read(&hwc->prev_count);
- amd_iommu_pc_get_set_reg_val(_GET_DEVID(event),
- _GET_BANK(event), _GET_CNTR(event),
- IOMMU_PC_COUNTER_REG, &prev_raw_count, true);
+ amd_iommu_pc_set_reg(iommu, _GET_BANK(event), _GET_CNTR(event),
+ IOMMU_PC_COUNTER_REG, &prev_raw_count);
}
perf_iommu_enable_event(event);
@@ -314,10 +309,11 @@ static void perf_iommu_read(struct perf_event *event)
{
u64 count, prev, delta;
struct hw_perf_event *hwc = &event->hw;
+ struct amd_iommu *iommu = get_amd_iommu(0);
- amd_iommu_pc_get_set_reg_val(_GET_DEVID(event),
- _GET_BANK(event), _GET_CNTR(event),
- IOMMU_PC_COUNTER_REG, &count, false);
+ if (amd_iommu_pc_get_reg(iommu, _GET_BANK(event), _GET_CNTR(event),
+ IOMMU_PC_COUNTER_REG, &count))
+ return;
/* IOMMU pc counter register is only 48 bits */
count &= GENMASK_ULL(47, 0);
diff --git a/arch/x86/events/amd/iommu.h b/arch/x86/events/amd/iommu.h
index b775107..62e0702 100644
--- a/arch/x86/events/amd/iommu.h
+++ b/arch/x86/events/amd/iommu.h
@@ -24,6 +24,8 @@
#define PC_MAX_SPEC_BNKS 64
#define PC_MAX_SPEC_CNTRS 16
+struct amd_iommu;
+
/* amd_iommu_init.c external support functions */
extern int amd_iommu_get_num_iommus(void);
@@ -33,8 +35,11 @@ extern u8 amd_iommu_pc_get_max_banks(unsigned int idx);
extern u8 amd_iommu_pc_get_max_counters(unsigned int idx);
-extern int amd_iommu_pc_get_set_reg_val(u16 devid, u8 bank, u8 cntr,
- u8 fxn, u64 *value, bool is_write);
+extern int amd_iommu_pc_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr,
+ u8 fxn, u64 *value);
+
+extern int amd_iommu_pc_get_reg(struct amd_iommu *iommu, u8 bank, u8 cntr,
+ u8 fxn, u64 *value);
extern struct amd_iommu *get_amd_iommu(int idx);
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index 8fdf109..5a11328 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -256,10 +256,6 @@ static int amd_iommu_enable_interrupts(void);
static int __init iommu_go_to_state(enum iommu_init_state state);
static void init_device_table_dma(void);
-static int iommu_pc_get_set_reg_val(struct amd_iommu *iommu,
- u8 bank, u8 cntr, u8 fxn,
- u64 *value, bool is_write);
-
static inline void update_last_devid(u16 devid)
{
if (devid > amd_iommu_last_bdf)
@@ -1484,6 +1480,8 @@ static int __init init_iommu_all(struct acpi_table_header *table)
return 0;
}
+static int iommu_pc_get_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr,
+ u8 fxn, u64 *value, bool is_write);
static void init_iommu_perf_ctr(struct amd_iommu *iommu)
{
@@ -1495,8 +1493,8 @@ static void init_iommu_perf_ctr(struct amd_iommu *iommu)
amd_iommu_pc_present = true;
/* Check if the performance counters can be written to */
- if ((0 != iommu_pc_get_set_reg_val(iommu, 0, 0, 0, &val, true)) ||
- (0 != iommu_pc_get_set_reg_val(iommu, 0, 0, 0, &val2, false)) ||
+ if ((iommu_pc_get_set_reg(iommu, 0, 0, 0, &val, true)) ||
+ (iommu_pc_get_set_reg(iommu, 0, 0, 0, &val2, false)) ||
(val != val2)) {
pr_err("AMD-Vi: Unable to write to IOMMU perf counter.\n");
amd_iommu_pc_present = false;
@@ -2765,15 +2763,18 @@ u8 amd_iommu_pc_get_max_counters(unsigned int idx)
}
EXPORT_SYMBOL(amd_iommu_pc_get_max_counters);
-static int iommu_pc_get_set_reg_val(struct amd_iommu *iommu,
- u8 bank, u8 cntr, u8 fxn,
- u64 *value, bool is_write)
+static int iommu_pc_get_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr,
+ u8 fxn, u64 *value, bool is_write)
{
u32 offset;
u32 max_offset_lim;
+ /* Make sure the IOMMU PC resource is available */
+ if (!amd_iommu_pc_present)
+ return -ENODEV;
+
/* Check for valid iommu and pc register indexing */
- if (WARN_ON((fxn > 0x28) || (fxn & 7)))
+ if (WARN_ON(!iommu || (fxn > 0x28) || (fxn & 7)))
return -ENODEV;
offset = (u32)(((0x40 | bank) << 12) | (cntr << 8) | fxn);
@@ -2799,17 +2800,21 @@ static int iommu_pc_get_set_reg_val(struct amd_iommu *iommu,
return 0;
}
-EXPORT_SYMBOL(amd_iommu_pc_get_set_reg_val);
-int amd_iommu_pc_get_set_reg_val(u16 devid, u8 bank, u8 cntr, u8 fxn,
- u64 *value, bool is_write)
+int amd_iommu_pc_get_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn, u64 *value)
{
- struct amd_iommu *iommu = amd_iommu_rlookup_table[devid];
+ if (!iommu)
+ return -EINVAL;
- /* Make sure the IOMMU PC resource is available */
- if (!amd_iommu_pc_present || iommu == NULL)
- return -ENODEV;
+ return iommu_pc_get_set_reg(iommu, bank, cntr, fxn, value, false);
+}
+EXPORT_SYMBOL(amd_iommu_pc_get_reg);
+
+int amd_iommu_pc_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn, u64 *value)
+{
+ if (!iommu)
+ return -EINVAL;
- return iommu_pc_get_set_reg_val(iommu, bank, cntr, fxn,
- value, is_write);
+ return iommu_pc_get_set_reg(iommu, bank, cntr, fxn, value, true);
}
+EXPORT_SYMBOL(amd_iommu_pc_set_reg);
diff --git a/drivers/iommu/amd_iommu_proto.h b/drivers/iommu/amd_iommu_proto.h
index cd2257e..466260f 100644
--- a/drivers/iommu/amd_iommu_proto.h
+++ b/drivers/iommu/amd_iommu_proto.h
@@ -57,11 +57,6 @@ extern int amd_iommu_domain_set_gcr3(struct iommu_domain *dom, int pasid,
extern int amd_iommu_domain_clear_gcr3(struct iommu_domain *dom, int pasid);
extern struct iommu_domain *amd_iommu_get_v2_domain(struct pci_dev *pdev);
-/* IOMMU Performance Counter functions */
-extern bool amd_iommu_pc_supported(void);
-extern int amd_iommu_pc_get_set_reg_val(u16 devid, u8 bank, u8 cntr, u8 fxn,
- u64 *value, bool is_write);
-
#ifdef CONFIG_IRQ_REMAP
extern int amd_iommu_create_irq_domain(struct amd_iommu *iommu);
#else
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