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Date: Tue, 22 Jul 2008 21:08:57 +0200
From: Robert Richter <robert.richter@....com>
To: Barry Kasindorf <barry.kasindorf@....com>,
Ingo Molnar <mingo@...e.hu>
CC: Thomas Gleixner <tglx@...utronix.de>,
oprofile-list <oprofile-list@...ts.sourceforge.net>,
LKML <linux-kernel@...r.kernel.org>,
Robert Richter <robert.richter@....com>
Subject: [PATCH 13/24] OProfile: Change IBS interrupt initialization
Signed-off-by: Robert Richter <robert.richter@....com>
---
arch/x86/oprofile/op_model_athlon.c | 84 ++++++++++++++++++++++------------
1 files changed, 54 insertions(+), 30 deletions(-)
diff --git a/arch/x86/oprofile/op_model_athlon.c b/arch/x86/oprofile/op_model_athlon.c
index a2c8e2e..90193b1 100644
--- a/arch/x86/oprofile/op_model_athlon.c
+++ b/arch/x86/oprofile/op_model_athlon.c
@@ -356,9 +356,11 @@ static void op_amd_shutdown(struct op_msrs const * const msrs)
}
}
+static u8 ibs_eilvt_off;
+
static inline void apic_init_ibs_nmi_per_cpu(void *arg)
{
- setup_APIC_eilvt_ibs(0, APIC_EILVT_MSG_NMI, 0);
+ ibs_eilvt_off = setup_APIC_eilvt_ibs(0, APIC_EILVT_MSG_NMI, 0);
}
static inline void apic_clear_ibs_nmi_per_cpu(void *arg)
@@ -366,45 +368,67 @@ static inline void apic_clear_ibs_nmi_per_cpu(void *arg)
setup_APIC_eilvt_ibs(0, APIC_EILVT_MSG_FIX, 1);
}
+static int pfm_amd64_setup_eilvt(void)
+{
+#define IBSCTL_LVTOFFSETVAL (1 << 8)
+#define IBSCTL 0x1cc
+ struct pci_dev *cpu_cfg;
+ int nodes;
+ u32 value = 0;
+
+ /* per CPU setup */
+ on_each_cpu(apic_init_ibs_nmi_per_cpu, NULL, 0, 1);
+
+ nodes = 0;
+ cpu_cfg = NULL;
+ do {
+ cpu_cfg = pci_get_device(PCI_VENDOR_ID_AMD,
+ PCI_DEVICE_ID_AMD_10H_NB_MISC,
+ cpu_cfg);
+ if (!cpu_cfg)
+ break;
+ ++nodes;
+ pci_write_config_dword(cpu_cfg, IBSCTL, ibs_eilvt_off
+ | IBSCTL_LVTOFFSETVAL);
+ pci_read_config_dword(cpu_cfg, IBSCTL, &value);
+ if (value != (ibs_eilvt_off | IBSCTL_LVTOFFSETVAL)) {
+ printk(KERN_DEBUG "Failed to setup IBS LVT offset, "
+ "IBSCTL = 0x%08x", value);
+ return 1;
+ }
+ } while (1);
+
+ if (!nodes) {
+ printk(KERN_DEBUG "No CPU node configured for IBS");
+ return 1;
+ }
+
+#ifdef CONFIG_NUMA
+ /* Sanity check */
+ /* Works only for 64bit with proper numa implementation. */
+ if (nodes != num_possible_nodes()) {
+ printk(KERN_DEBUG "Failed to setup CPU node(s) for IBS, "
+ "found: %d, expected %d",
+ nodes, num_possible_nodes());
+ return 1;
+ }
+#endif
+ return 0;
+}
+
/*
* initialize the APIC for the IBS interrupts
- * if needed on AMD Family10h rev B0 and later
+ * if available (AMD Family10h rev B0 and later)
*/
static void setup_ibs(void)
{
- struct pci_dev *gh_device = NULL;
- u32 low, high;
- u8 vector;
-
ibs_allowed = boot_cpu_has(X86_FEATURE_IBS);
if (!ibs_allowed)
return;
- /* This gets the APIC_EILVT_LVTOFF_IBS value */
- vector = setup_APIC_eilvt_ibs(0, 0, 1);
-
- /*see if the IBS control register is already set correctly*/
- /*remove this when we know for sure it is done
- in the kernel init*/
- rdmsr(MSR_AMD64_IBSCTL, low, high);
- if ((low & (IBS_CTL_LVT_OFFSET_VALID_BIT | vector)) !=
- (IBS_CTL_LVT_OFFSET_VALID_BIT | vector)) {
-
- /**** Be sure to run loop until NULL is returned to
- decrement reference count on any pci_dev structures
- returned ****/
- while ((gh_device = pci_get_device(PCI_VENDOR_ID_AMD,
- PCI_DEVICE_ID_AMD_10H_NB_MISC, gh_device))
- != NULL) {
- /* This code may change if we can find a proper
- * way to get at the PCI extended config space */
- pci_write_config_dword(
- gh_device, IBS_LVT_OFFSET_PCI,
- (vector | IBS_CTL_LVT_OFFSET_VALID_BIT));
- }
- }
- on_each_cpu(apic_init_ibs_nmi_per_cpu, NULL, 1, 1);
+ if (pfm_amd64_setup_eilvt())
+ ibs_allowed = 0;
}
--
1.5.5.4
--
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