x86/apic/savic: Do not use snp_abort()

This function is going away so replace the callsites with the equivalent
functionality. Add a new SAVIC-specific termination reason. If more
granularity is needed there, it will be revisited in the future.

Signed-off-by: Borislav Petkov (AMD) <[e-mail]>

arch/x86/coco/sev/core.c

···
 	if (res != ES_OK) {
 		pr_err("Secure AVIC MSR (0x%llx) read returned error (%d)\n", msr, res);
 		/* MSR read failures are treated as fatal errors */
-		snp_abort();
+		sev_es_terminate(SEV_TERM_SET_LINUX, GHCB_TERM_SAVIC_FAIL);
 	}
 
 	__sev_put_ghcb(&state);
···
 	if (res != ES_OK) {
 		pr_err("Secure AVIC MSR (0x%llx) write returned error (%d)\n", msr, res);
 		/* MSR writes should never fail. Any failure is fatal error for SNP guest */
-		snp_abort();
+		sev_es_terminate(SEV_TERM_SET_LINUX, GHCB_TERM_SAVIC_FAIL);
 	}
 
 	__sev_put_ghcb(&state);

arch/x86/include/asm/sev-common.h

···
 #define GHCB_TERM_SVSM_CAA		9	/* SVSM is present but CAA is not page aligned */
 #define GHCB_TERM_SECURE_TSC		10	/* Secure TSC initialization failed */
 #define GHCB_TERM_SVSM_CA_REMAP_FAIL	11	/* SVSM is present but CA could not be remapped */
+#define GHCB_TERM_SAVIC_FAIL		12	/* Secure AVIC-specific failure */
 
 #define GHCB_RESP_CODE(v)		((v) & GHCB_MSR_INFO_MASK)
 

arch/x86/kernel/apic/x2apic_savic.c

···
 	 */
 	res = savic_register_gpa(gpa);
 	if (res != ES_OK)
-		snp_abort();
+		sev_es_terminate(SEV_TERM_SET_LINUX, GHCB_TERM_SAVIC_FAIL);
 
 	native_wrmsrq(MSR_AMD64_SAVIC_CONTROL,
 		      gpa | MSR_AMD64_SAVIC_EN | MSR_AMD64_SAVIC_ALLOWEDNMI);
···
 
 	if (!x2apic_mode) {
 		pr_err("Secure AVIC enabled in non x2APIC mode\n");
-		snp_abort();
+		sev_es_terminate(SEV_TERM_SET_LINUX, GHCB_TERM_SAVIC_FAIL);
 		/* unreachable */
 	}
 
 	savic_page = alloc_percpu(struct secure_avic_page);
 	if (!savic_page)
-		snp_abort();
+		sev_es_terminate(SEV_TERM_SET_LINUX, GHCB_TERM_SAVIC_FAIL);
 
 	return 1;
 }