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KVM: selftests: Add a helper for SMCCC calls with SMC instruction

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Build a helper for doing SMCs in selftests by macro-izing the current
HVC implementation and taking the conduit instruction as an argument.

Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230404154050.2270077-13-oliver.upton@linux.dev
This commit is contained in:
Oliver Upton
2023-04-04 15:40:49 +00:00
committed by Marc Zyngier
parent 37c8e49479
commit fab19915f4
2 changed files with 46 additions and 19 deletions
Download Patch File Download Diff File Expand all files Collapse all files
tools/testing/selftests/kvm/include/aarch64/processor.h
+13
View File
@@ -214,6 +214,19 @@ void smccc_hvc(uint32_t function_id, uint64_t arg0, uint64_t arg1,
uint64_t arg2, uint64_t arg3, uint64_t arg4, uint64_t arg5,
uint64_t arg6, struct arm_smccc_res *res);
/**
* smccc_smc - Invoke a SMCCC function using the smc conduit
* @function_id: the SMCCC function to be called
* @arg0-arg6: SMCCC function arguments, corresponding to registers x1-x7
* @res: pointer to write the return values from registers x0-x3
*
*/
void smccc_smc(uint32_t function_id, uint64_t arg0, uint64_t arg1,
uint64_t arg2, uint64_t arg3, uint64_t arg4, uint64_t arg5,
uint64_t arg6, struct arm_smccc_res *res);
uint32_t guest_get_vcpuid(void);
#endif /* SELFTEST_KVM_PROCESSOR_H */
tools/testing/selftests/kvm/lib/aarch64/processor.c
+33 -19
View File
@@ -508,29 +508,43 @@ void aarch64_get_supported_page_sizes(uint32_t ipa,
close(kvm_fd);
}
#define __smccc_call(insn, function_id, arg0, arg1, arg2, arg3, arg4, arg5, \
arg6, res) \
asm volatile("mov w0, %w[function_id]\n" \
"mov x1, %[arg0]\n" \
"mov x2, %[arg1]\n" \
"mov x3, %[arg2]\n" \
"mov x4, %[arg3]\n" \
"mov x5, %[arg4]\n" \
"mov x6, %[arg5]\n" \
"mov x7, %[arg6]\n" \
#insn "#0\n" \
"mov %[res0], x0\n" \
"mov %[res1], x1\n" \
"mov %[res2], x2\n" \
"mov %[res3], x3\n" \
: [res0] "=r"(res->a0), [res1] "=r"(res->a1), \
[res2] "=r"(res->a2), [res3] "=r"(res->a3) \
: [function_id] "r"(function_id), [arg0] "r"(arg0), \
[arg1] "r"(arg1), [arg2] "r"(arg2), [arg3] "r"(arg3), \
[arg4] "r"(arg4), [arg5] "r"(arg5), [arg6] "r"(arg6) \
: "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7")
void smccc_hvc(uint32_t function_id, uint64_t arg0, uint64_t arg1,
uint64_t arg2, uint64_t arg3, uint64_t arg4, uint64_t arg5,
uint64_t arg6, struct arm_smccc_res *res)
{
asm volatile("mov w0, %w[function_id]\n"
"mov x1, %[arg0]\n"
"mov x2, %[arg1]\n"
"mov x3, %[arg2]\n"
"mov x4, %[arg3]\n"
"mov x5, %[arg4]\n"
"mov x6, %[arg5]\n"
"mov x7, %[arg6]\n"
"hvc #0\n"
"mov %[res0], x0\n"
"mov %[res1], x1\n"
"mov %[res2], x2\n"
"mov %[res3], x3\n"
: [res0] "=r"(res->a0), [res1] "=r"(res->a1),
[res2] "=r"(res->a2), [res3] "=r"(res->a3)
: [function_id] "r"(function_id), [arg0] "r"(arg0),
[arg1] "r"(arg1), [arg2] "r"(arg2), [arg3] "r"(arg3),
[arg4] "r"(arg4), [arg5] "r"(arg5), [arg6] "r"(arg6)
: "x0", "x1", "x2", "x3", "x4", "x5", "x6", "x7");
__smccc_call(hvc, function_id, arg0, arg1, arg2, arg3, arg4, arg5,
arg6, res);
}
void smccc_smc(uint32_t function_id, uint64_t arg0, uint64_t arg1,
uint64_t arg2, uint64_t arg3, uint64_t arg4, uint64_t arg5,
uint64_t arg6, struct arm_smccc_res *res)
{
__smccc_call(smc, function_id, arg0, arg1, arg2, arg3, arg4, arg5,
arg6, res);
}
void kvm_selftest_arch_init(void)