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| author | David S. Miller <davem@davemloft.net> | 2020-07-11 00:46:00 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2020-07-11 00:46:00 -0700 |
| commit | 71930d61025e7d0254f3c682cb1b5242e0499cf3 (patch) | |
| tree | 43b642f15d33ae6ba08a31ddf2d50e2915868a5e /tools/testing/selftests/x86/helpers.h | |
| parent | a594920f8747fa032c784c3660d6cd5a8ab291f8 (diff) | |
| parent | 1df0d8960499e58963fd6c8ac75e544f2b417b29 (diff) | |
| download | linux-71930d61025e7d0254f3c682cb1b5242e0499cf3.tar.bz2 | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
All conflicts seemed rather trivial, with some guidance from
Saeed Mameed on the tc_ct.c one.
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'tools/testing/selftests/x86/helpers.h')
| -rw-r--r-- | tools/testing/selftests/x86/helpers.h | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/tools/testing/selftests/x86/helpers.h b/tools/testing/selftests/x86/helpers.h new file mode 100644 index 000000000000..f5ff2a2615df --- /dev/null +++ b/tools/testing/selftests/x86/helpers.h @@ -0,0 +1,41 @@ +// SPDX-License-Identifier: GPL-2.0-only +#ifndef __SELFTESTS_X86_HELPERS_H +#define __SELFTESTS_X86_HELPERS_H + +#include <asm/processor-flags.h> + +static inline unsigned long get_eflags(void) +{ + unsigned long eflags; + + asm volatile ( +#ifdef __x86_64__ + "subq $128, %%rsp\n\t" + "pushfq\n\t" + "popq %0\n\t" + "addq $128, %%rsp" +#else + "pushfl\n\t" + "popl %0" +#endif + : "=r" (eflags) :: "memory"); + + return eflags; +} + +static inline void set_eflags(unsigned long eflags) +{ + asm volatile ( +#ifdef __x86_64__ + "subq $128, %%rsp\n\t" + "pushq %0\n\t" + "popfq\n\t" + "addq $128, %%rsp" +#else + "pushl %0\n\t" + "popfl" +#endif + :: "r" (eflags) : "flags", "memory"); +} + +#endif /* __SELFTESTS_X86_HELPERS_H */ |