diff options
Diffstat (limited to 'target/linux/generic/pending-4.19/103-MIPS-perf-ath79-Fix-perfcount-IRQ-assignment.patch')
| -rw-r--r-- | target/linux/generic/pending-4.19/103-MIPS-perf-ath79-Fix-perfcount-IRQ-assignment.patch | 110 |
1 files changed, 0 insertions, 110 deletions
diff --git a/target/linux/generic/pending-4.19/103-MIPS-perf-ath79-Fix-perfcount-IRQ-assignment.patch b/target/linux/generic/pending-4.19/103-MIPS-perf-ath79-Fix-perfcount-IRQ-assignment.patch deleted file mode 100644 index 6b74c7da1d..0000000000 --- a/target/linux/generic/pending-4.19/103-MIPS-perf-ath79-Fix-perfcount-IRQ-assignment.patch +++ /dev/null @@ -1,110 +0,0 @@ -From 852a88f35f4b7e5ebb717fed3c3a3330d5ad4336 Mon Sep 17 00:00:00 2001 -From: =?UTF-8?q?Petr=20=C5=A0tetiar?= <ynezz@true.cz> -Date: Wed, 10 Apr 2019 16:43:27 +0200 -Subject: [PATCH v2] MIPS: perf: ath79: Fix perfcount IRQ assignment -MIME-Version: 1.0 -Content-Type: text/plain; charset=UTF-8 -Content-Transfer-Encoding: 8bit - -Currently it's not possible to use perf on ath79 due to genirq flags -mismatch happening on static virtual IRQ 13 which is used for -performance counters hardware IRQ 5. - -On TP-Link Archer C7v5: - - CPU0 - 2: 0 MIPS 2 ath9k - 4: 318 MIPS 4 19000000.eth - 7: 55034 MIPS 7 timer - 8: 1236 MISC 3 ttyS0 - 12: 0 INTC 1 ehci_hcd:usb1 - 13: 0 gpio-ath79 2 keys - 14: 0 gpio-ath79 5 keys - 15: 31 AR724X PCI 1 ath10k_pci - - $ perf top - genirq: Flags mismatch irq 13. 00014c83 (mips_perf_pmu) vs. 00002003 (keys) - -On TP-Link Archer C7v4: - - CPU0 - 4: 0 MIPS 4 19000000.eth - 5: 7135 MIPS 5 1a000000.eth - 7: 98379 MIPS 7 timer - 8: 30 MISC 3 ttyS0 - 12: 90028 INTC 0 ath9k - 13: 5520 INTC 1 ehci_hcd:usb1 - 14: 4623 INTC 2 ehci_hcd:usb2 - 15: 32844 AR724X PCI 1 ath10k_pci - 16: 0 gpio-ath79 16 keys - 23: 0 gpio-ath79 23 keys - - $ perf top - genirq: Flags mismatch irq 13. 00014c80 (mips_perf_pmu) vs. 00000080 (ehci_hcd:usb1) - -This problem is happening, because currently statically assigned virtual -IRQ 13 for performance counters is not claimed during the initialization -of MIPS PMU during the bootup, so the IRQ subsystem doesn't know, that -this interrupt isn't available for further use. - -So this patch fixes the issue by simply booking hardware IRQ 5 for MIPS PMU. - -Tested-by: Kevin 'ldir' Darbyshire-Bryant <ldir@darbyshire-bryant.me.uk> -Signed-off-by: Petr Štetiar <ynezz@true.cz> ---- - -Changes since v1: - - I've incorporated two comments which I've received on IRC from blogic and - I've also reworded the commit message to match the changes in v2 of this - patch. - - * use actual hardware perfcount IRQ 5 instead of the virtual IRQ 13 - * dropped the CONFIG_PERF_EVENTS ifdef around irq_create_mapping - - arch/mips/ath79/setup.c | 6 ------ - drivers/irqchip/irq-ath79-misc.c | 11 +++++++++++ - 2 files changed, 11 insertions(+), 6 deletions(-) - ---- a/arch/mips/ath79/setup.c -+++ b/arch/mips/ath79/setup.c -@@ -211,12 +211,6 @@ const char *get_system_type(void) - return ath79_sys_type; - } - --int get_c0_perfcount_int(void) --{ -- return ATH79_MISC_IRQ(5); --} --EXPORT_SYMBOL_GPL(get_c0_perfcount_int); -- - unsigned int get_c0_compare_int(void) - { - return CP0_LEGACY_COMPARE_IRQ; ---- a/drivers/irqchip/irq-ath79-misc.c -+++ b/drivers/irqchip/irq-ath79-misc.c -@@ -22,6 +22,15 @@ - #define AR71XX_RESET_REG_MISC_INT_ENABLE 4 - - #define ATH79_MISC_IRQ_COUNT 32 -+#define ATH79_MISC_PERF_IRQ 5 -+ -+static int ath79_perfcount_irq; -+ -+int get_c0_perfcount_int(void) -+{ -+ return ath79_perfcount_irq; -+} -+EXPORT_SYMBOL_GPL(get_c0_perfcount_int); - - static void ath79_misc_irq_handler(struct irq_desc *desc) - { -@@ -113,6 +122,8 @@ static void __init ath79_misc_intc_domai - { - void __iomem *base = domain->host_data; - -+ ath79_perfcount_irq = irq_create_mapping(domain, ATH79_MISC_PERF_IRQ); -+ - /* Disable and clear all interrupts */ - __raw_writel(0, base + AR71XX_RESET_REG_MISC_INT_ENABLE); - __raw_writel(0, base + AR71XX_RESET_REG_MISC_INT_STATUS); |