diff options
| author | Anton Ivanov <anton.ivanov@cambridgegreys.com> | 2021-03-12 15:16:07 +0000 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2021-06-17 22:01:26 +0200 |
| commit | d8fb32f4790f2a286e58db8548016378ac35fc6f (patch) | |
| tree | 050c2708dc80d0d61fb6d247a487d02e3c2b6f4f /arch/um/include/asm/processor-generic.h | |
| parent | 386093c68ba3e8bcfe7f46deba901e0e80713c29 (diff) | |
um: Add support for host CPU flags and alignment
1. Reflect host cpu flags into the UML instance so they can
be used to select the correct implementations for xor, crypto, etc.
2. Reflect host cache alignment into UML instance. This is
important when running 32 bit on a 64 bit host as 32 bit by
default aligns to 32 while the actual alignment should be 64.
Ditto for some Xeons which align at 128.
Signed-off-by: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/um/include/asm/processor-generic.h')
| -rw-r--r-- | arch/um/include/asm/processor-generic.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/um/include/asm/processor-generic.h b/arch/um/include/asm/processor-generic.h index afd9b267cf81..b5cf0ed116d9 100644 --- a/arch/um/include/asm/processor-generic.h +++ b/arch/um/include/asm/processor-generic.h @@ -16,6 +16,8 @@ struct task_struct; #include <linux/prefetch.h> +#include <asm/cpufeatures.h> + struct mm_struct; struct thread_struct { @@ -90,12 +92,18 @@ extern void start_thread(struct pt_regs *regs, unsigned long entry, struct cpuinfo_um { unsigned long loops_per_jiffy; int ipi_pipe[2]; + int cache_alignment; + union { + __u32 x86_capability[NCAPINTS + NBUGINTS]; + unsigned long x86_capability_alignment; + }; }; extern struct cpuinfo_um boot_cpu_data; #define cpu_data (&boot_cpu_data) #define current_cpu_data boot_cpu_data +#define cache_line_size() (boot_cpu_data.cache_alignment) #define KSTK_REG(tsk, reg) get_thread_reg(reg, &tsk->thread.switch_buf) extern unsigned long get_wchan(struct task_struct *p); |