diff options
Diffstat (limited to 'drivers/hv/hv.c')
| -rw-r--r-- | drivers/hv/hv.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/drivers/hv/hv.c b/drivers/hv/hv.c index e0a8216ecf2b..13c32eb40738 100644 --- a/drivers/hv/hv.c +++ b/drivers/hv/hv.c @@ -31,6 +31,7 @@ #include <linux/clockchips.h> #include <asm/hyperv.h> #include <asm/mshyperv.h> +#include <asm/nospec-branch.h> #include "hyperv_vmbus.h" /* The one and only */ @@ -103,9 +104,10 @@ u64 hv_do_hypercall(u64 control, void *input, void *output) return (u64)ULLONG_MAX; __asm__ __volatile__("mov %0, %%r8" : : "r" (output_address) : "r8"); - __asm__ __volatile__("call *%3" : "=a" (hv_status) : + __asm__ __volatile__(CALL_NOSPEC : + "=a" (hv_status) : "c" (control), "d" (input_address), - "m" (hypercall_page)); + THUNK_TARGET(hypercall_page)); return hv_status; @@ -123,11 +125,12 @@ u64 hv_do_hypercall(u64 control, void *input, void *output) if (!hypercall_page) return (u64)ULLONG_MAX; - __asm__ __volatile__ ("call *%8" : "=d"(hv_status_hi), + __asm__ __volatile__ (CALL_NOSPEC : "=d"(hv_status_hi), "=a"(hv_status_lo) : "d" (control_hi), "a" (control_lo), "b" (input_address_hi), "c" (input_address_lo), "D"(output_address_hi), - "S"(output_address_lo), "m" (hypercall_page)); + "S"(output_address_lo), + THUNK_TARGET(hypercall_page)); return hv_status_lo | ((u64)hv_status_hi << 32); #endif /* !x86_64 */ |