diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-01 23:00:21 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-01 23:00:21 -0700 |
| commit | 7d6a31c394722c914c61292b457e1999c8bef5ea (patch) | |
| tree | 3e7e1544d95a7839e651dd5736bb5b325b067c7d /arch/x86/kernel/setup.c | |
| parent | 2cc12e2e8cb65aec9a95a3d3de4d70e7b6b8c881 (diff) | |
| parent | 1b326277798aa820c1043617786609b9bb4bee78 (diff) | |
Merge branch 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 debug updates from Ingo Molnar:
"The biggest update is the addition of USB3 debug port based
early-console.
Greg was fine with the USB changes and with the routing of these
patches:
https://www.spinics.net/lists/linux-usb/msg155093.html"
* 'x86-debug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
usb/doc: Add document for USB3 debug port usage
usb/serial: Add DBC debug device support to usb_debug
x86/earlyprintk: Add support for earlyprintk via USB3 debug port
usb/early: Add driver for xhci debug capability
x86/timers: Add simple udelay calibration
Diffstat (limited to 'arch/x86/kernel/setup.c')
| -rw-r--r-- | arch/x86/kernel/setup.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c index 62a1c74855e5..0b4d3c686b1e 100644 --- a/arch/x86/kernel/setup.c +++ b/arch/x86/kernel/setup.c @@ -70,6 +70,7 @@ #include <linux/tboot.h> #include <linux/jiffies.h> +#include <linux/usb/xhci-dbgp.h> #include <video/edid.h> #include <asm/mtrr.h> @@ -811,6 +812,26 @@ dump_kernel_offset(struct notifier_block *self, unsigned long v, void *p) return 0; } +static void __init simple_udelay_calibration(void) +{ + unsigned int tsc_khz, cpu_khz; + unsigned long lpj; + + if (!boot_cpu_has(X86_FEATURE_TSC)) + return; + + cpu_khz = x86_platform.calibrate_cpu(); + tsc_khz = x86_platform.calibrate_tsc(); + + tsc_khz = tsc_khz ? : cpu_khz; + if (!tsc_khz) + return; + + lpj = tsc_khz * 1000; + do_div(lpj, HZ); + loops_per_jiffy = lpj; +} + /* * Determine if we were loaded by an EFI loader. If so, then we have also been * passed the efi memmap, systab, etc., so we should use these data structures @@ -959,6 +980,8 @@ void __init setup_arch(char **cmdline_p) */ x86_configure_nx(); + simple_udelay_calibration(); + parse_early_param(); #ifdef CONFIG_MEMORY_HOTPLUG @@ -1095,6 +1118,9 @@ void __init setup_arch(char **cmdline_p) memblock_set_current_limit(ISA_END_ADDRESS); e820__memblock_setup(); + if (!early_xdbc_setup_hardware()) + early_xdbc_register_console(); + reserve_bios_regions(); if (efi_enabled(EFI_MEMMAP)) { |