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x86/hyperv: Use named operands in inline asm

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Use named operands in inline asm to make it easier to change the
constraint order.

Do this in preparation of changing the ASM_CALL_CONSTRAINT primitive.

Signed-off-by: Josh Poimboeuf <jpoimboe@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Wei Liu <wei.liu@kernel.org>
Cc: Dexuan Cui <decui@microsoft.com>
Cc: linux-kernel@vger.kernel.org
This commit is contained in:
Josh Poimboeuf 2025-03-02 17:21:00 -08:00 committed by Ingo Molnar
parent e1c49eaee5
commit 9064a8e556
1 changed files with 9 additions and 9 deletions
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18
arch/x86/include/asm/mshyperv.h
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@ -77,11 +77,11 @@ static inline u64 hv_do_hypercall(u64 control, void *input, void *output)
return hv_tdx_hypercall(control, input_address, output_address);
if (hv_isolation_type_snp() && !hyperv_paravisor_present) {
__asm__ __volatile__("mov %4, %%r8\n"
__asm__ __volatile__("mov %[output_address], %%r8\n"
"vmmcall"
: "=a" (hv_status), ASM_CALL_CONSTRAINT,
"+c" (control), "+d" (input_address)
: "r" (output_address)
: [output_address] "r" (output_address)
: "cc", "memory", "r8", "r9", "r10", "r11");
return hv_status;
}
@ -89,12 +89,12 @@ static inline u64 hv_do_hypercall(u64 control, void *input, void *output)
if (!hv_hypercall_pg)
return U64_MAX;
__asm__ __volatile__("mov %4, %%r8\n"
__asm__ __volatile__("mov %[output_address], %%r8\n"
CALL_NOSPEC
: "=a" (hv_status), ASM_CALL_CONSTRAINT,
"+c" (control), "+d" (input_address)
: "r" (output_address),
THUNK_TARGET(hv_hypercall_pg)
: [output_address] "r" (output_address),
THUNK_TARGET(hv_hypercall_pg)
: "cc", "memory", "r8", "r9", "r10", "r11");
#else
u32 input_address_hi = upper_32_bits(input_address);
@ -187,18 +187,18 @@ static inline u64 _hv_do_fast_hypercall16(u64 control, u64 input1, u64 input2)
return hv_tdx_hypercall(control, input1, input2);
if (hv_isolation_type_snp() && !hyperv_paravisor_present) {
__asm__ __volatile__("mov %4, %%r8\n"
__asm__ __volatile__("mov %[input2], %%r8\n"
"vmmcall"
: "=a" (hv_status), ASM_CALL_CONSTRAINT,
"+c" (control), "+d" (input1)
: "r" (input2)
: [input2] "r" (input2)
: "cc", "r8", "r9", "r10", "r11");
} else {
__asm__ __volatile__("mov %4, %%r8\n"
__asm__ __volatile__("mov %[input2], %%r8\n"
CALL_NOSPEC
: "=a" (hv_status), ASM_CALL_CONSTRAINT,
"+c" (control), "+d" (input1)
: "r" (input2),
: [input2] "r" (input2),
THUNK_TARGET(hv_hypercall_pg)
: "cc", "r8", "r9", "r10", "r11");
}