1d75fac5fSJanosch Frank /* SPDX-License-Identifier: GPL-2.0-only */ 2d75fac5fSJanosch Frank /* 3ab68f968SJanosch Frank * Library for managing various aspects of guests 4d75fac5fSJanosch Frank * 5d75fac5fSJanosch Frank * Copyright (c) 2021 IBM Corp 6d75fac5fSJanosch Frank * 7d75fac5fSJanosch Frank * Authors: 8d75fac5fSJanosch Frank * Janosch Frank <frankja@linux.ibm.com> 9d75fac5fSJanosch Frank */ 10d75fac5fSJanosch Frank 11d75fac5fSJanosch Frank #include <asm/barrier.h> 12d75fac5fSJanosch Frank #include <libcflat.h> 13d75fac5fSJanosch Frank #include <sie.h> 14a58e5546SJanosch Frank #include <asm/page.h> 15a58e5546SJanosch Frank #include <libcflat.h> 16a58e5546SJanosch Frank #include <alloc_page.h> 17d75fac5fSJanosch Frank 18d75fac5fSJanosch Frank static bool validity_expected; 19d75fac5fSJanosch Frank static uint16_t vir; /* Validity interception reason */ 20d75fac5fSJanosch Frank 21d75fac5fSJanosch Frank void sie_expect_validity(void) 22d75fac5fSJanosch Frank { 23d75fac5fSJanosch Frank validity_expected = true; 24d75fac5fSJanosch Frank vir = 0; 25d75fac5fSJanosch Frank } 26d75fac5fSJanosch Frank 27d75fac5fSJanosch Frank void sie_check_validity(uint16_t vir_exp) 28d75fac5fSJanosch Frank { 29d75fac5fSJanosch Frank report(vir_exp == vir, "VALIDITY: %x", vir); 30d75fac5fSJanosch Frank vir = 0; 31d75fac5fSJanosch Frank } 32d75fac5fSJanosch Frank 33d75fac5fSJanosch Frank void sie_handle_validity(struct vm *vm) 34d75fac5fSJanosch Frank { 35d75fac5fSJanosch Frank if (vm->sblk->icptcode != ICPT_VALIDITY) 36d75fac5fSJanosch Frank return; 37d75fac5fSJanosch Frank 38d75fac5fSJanosch Frank vir = vm->sblk->ipb >> 16; 39d75fac5fSJanosch Frank 40d75fac5fSJanosch Frank if (!validity_expected) 41d75fac5fSJanosch Frank report_abort("VALIDITY: %x", vir); 42d75fac5fSJanosch Frank validity_expected = false; 43d75fac5fSJanosch Frank } 44a58e5546SJanosch Frank 45ab68f968SJanosch Frank void sie(struct vm *vm) 46ab68f968SJanosch Frank { 47*e9a5c8b6SJanosch Frank if (vm->sblk->sdf == 2) 48*e9a5c8b6SJanosch Frank memcpy(vm->sblk->pv_grregs, vm->save_area.guest.grs, 49*e9a5c8b6SJanosch Frank sizeof(vm->save_area.guest.grs)); 50*e9a5c8b6SJanosch Frank 51ab68f968SJanosch Frank /* Reset icptcode so we don't trip over it below */ 52ab68f968SJanosch Frank vm->sblk->icptcode = 0; 53ab68f968SJanosch Frank 54ab68f968SJanosch Frank while (vm->sblk->icptcode == 0) { 55ab68f968SJanosch Frank sie64a(vm->sblk, &vm->save_area); 56ab68f968SJanosch Frank sie_handle_validity(vm); 57ab68f968SJanosch Frank } 58ab68f968SJanosch Frank vm->save_area.guest.grs[14] = vm->sblk->gg14; 59ab68f968SJanosch Frank vm->save_area.guest.grs[15] = vm->sblk->gg15; 60*e9a5c8b6SJanosch Frank 61*e9a5c8b6SJanosch Frank if (vm->sblk->sdf == 2) 62*e9a5c8b6SJanosch Frank memcpy(vm->save_area.guest.grs, vm->sblk->pv_grregs, 63*e9a5c8b6SJanosch Frank sizeof(vm->save_area.guest.grs)); 64ab68f968SJanosch Frank } 65ab68f968SJanosch Frank 666d1cb286SJanosch Frank void sie_guest_sca_create(struct vm *vm) 676d1cb286SJanosch Frank { 686d1cb286SJanosch Frank vm->sca = (struct esca_block *)alloc_page(); 696d1cb286SJanosch Frank 706d1cb286SJanosch Frank /* Let's start out with one page of ESCA for now */ 716d1cb286SJanosch Frank vm->sblk->scaoh = ((uint64_t)vm->sca >> 32); 726d1cb286SJanosch Frank vm->sblk->scaol = (uint64_t)vm->sca & ~0x3fU; 736d1cb286SJanosch Frank vm->sblk->ecb2 |= ECB2_ESCA; 746d1cb286SJanosch Frank } 756d1cb286SJanosch Frank 76a58e5546SJanosch Frank /* Initializes the struct vm members like the SIE control block. */ 77a58e5546SJanosch Frank void sie_guest_create(struct vm *vm, uint64_t guest_mem, uint64_t guest_mem_len) 78a58e5546SJanosch Frank { 79a58e5546SJanosch Frank vm->sblk = alloc_page(); 80a58e5546SJanosch Frank memset(vm->sblk, 0, PAGE_SIZE); 81a58e5546SJanosch Frank vm->sblk->cpuflags = CPUSTAT_ZARCH | CPUSTAT_RUNNING; 82a58e5546SJanosch Frank vm->sblk->ihcpu = 0xffff; 83a58e5546SJanosch Frank vm->sblk->prefix = 0; 84a58e5546SJanosch Frank 85a58e5546SJanosch Frank /* Guest memory chunks are always 1MB */ 86a58e5546SJanosch Frank assert(!(guest_mem_len & ~HPAGE_MASK)); 87a58e5546SJanosch Frank /* Currently MSO/MSL is the easiest option */ 88a58e5546SJanosch Frank vm->sblk->mso = (uint64_t)guest_mem; 89a58e5546SJanosch Frank vm->sblk->msl = (uint64_t)guest_mem + ((guest_mem_len - 1) & HPAGE_MASK); 90a58e5546SJanosch Frank 91a58e5546SJanosch Frank /* CRYCB needs to be in the first 2GB */ 92a58e5546SJanosch Frank vm->crycb = alloc_pages_flags(0, AREA_DMA31); 93a58e5546SJanosch Frank vm->sblk->crycbd = (uint32_t)(uintptr_t)vm->crycb; 94a58e5546SJanosch Frank } 95a58e5546SJanosch Frank 96a58e5546SJanosch Frank /* Frees the memory that was gathered on initialization */ 97a58e5546SJanosch Frank void sie_guest_destroy(struct vm *vm) 98a58e5546SJanosch Frank { 99a58e5546SJanosch Frank free_page(vm->crycb); 100a58e5546SJanosch Frank free_page(vm->sblk); 1016d1cb286SJanosch Frank if (vm->sblk->ecb2 & ECB2_ESCA) 1026d1cb286SJanosch Frank free_page(vm->sca); 103a58e5546SJanosch Frank } 104