x86/kernel/sev-shared.c

28 	u32 fn;
63 	struct snp_cpuid_fn fn[SNP_CPUID_COUNT_MAX];
251 static int __sev_cpuid_hv(u32 fn, int reg_idx, u32 *reg)
255 	sev_es_wr_ghcb_msr(GHCB_CPUID_REQ(fn, reg_idx));
278 	if (cpuid_function_is_indexed(leaf->fn) && leaf->subfn)
281 	ret =         __sev_cpuid_hv(leaf->fn, GHCB_CPUID_REQ_EAX, &leaf->eax);
282 	ret = ret ? : __sev_cpuid_hv(leaf->fn, GHCB_CPUID_REQ_EBX, &leaf->ebx);
283 	ret = ret ? : __sev_cpuid_hv(leaf->fn, GHCB_CPUID_REQ_ECX, &leaf->ecx);
284 	ret = ret ? : __sev_cpuid_hv(leaf->fn, GHCB_CPUID_REQ_EDX, &leaf->edx);
294 	ghcb_set_rax(ghcb, leaf->fn);
367 		const struct snp_cpuid_fn *e = &cpuid_table->fn[i];
402 		const struct snp_cpuid_fn *e = &cpuid_table->fn[i];
404 		if (e->eax_in != leaf->fn)
407 		if (cpuid_function_is_indexed(leaf->fn) && e->ecx_in != leaf->subfn)
442 	switch (leaf->fn) {
561 		if (!(leaf->fn <= RIP_REL_REF(cpuid_std_range_max) ||
562 		      (leaf->fn >= 0x40000000 && leaf->fn <= RIP_REL_REF(cpuid_hyp_range_max)) ||
563 		      (leaf->fn >= 0x80000000 && leaf->fn <= RIP_REL_REF(cpuid_ext_range_max))))
578 	unsigned int fn = lower_bits(regs->ax, 32);
591 	leaf.fn = fn;
625 	if (fn == 0x80000000 && (regs->ax < 0x8000001f))
628 	else if ((fn == 0x8000001f && !(regs->ax & BIT(1))))
939 	leaf.fn = regs->ax;
1071 		const struct snp_cpuid_fn *fn = &cpuid_table->fn[i];
1073 		if (fn->eax_in == 0x0)
1074 			RIP_REL_REF(cpuid_std_range_max) = fn->eax;
1075 		else if (fn->eax_in == 0x40000000)
1076 			RIP_REL_REF(cpuid_hyp_range_max) = fn->eax;
1077 		else if (fn->eax_in == 0x80000000)
1078 			RIP_REL_REF(cpuid_ext_range_max) = fn->eax;