/* * QTest testcase for Q35 northbridge * * Copyright (c) 2015 Red Hat, Inc. * * Author: Gerd Hoffmann <kraxel@redhat.com> * * This work is licensed under the terms of the GNU GPL, version 2 or later. * See the COPYING file in the top-level directory. */ #include "qemu/osdep.h" #include "libqtest.h" #include "libqos/pci.h" #include "libqos/pci-pc.h" #include "hw/pci-host/q35.h" #define TSEG_SIZE_TEST_GUEST_RAM_MBYTES 128 /* @esmramc_tseg_sz: ESMRAMC.TSEG_SZ bitmask for selecting the requested TSEG * size. Must be a subset of * MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_MASK. * * @extended_tseg_mbytes: Size of the extended TSEG. Only consulted if * @esmramc_tseg_sz equals * MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_MASK precisely. * * @expected_tseg_mbytes: Expected guest-visible TSEG size in megabytes, * matching @esmramc_tseg_sz and @extended_tseg_mbytes * above. */ struct TsegSizeArgs { uint8_t esmramc_tseg_sz; uint16_t extended_tseg_mbytes; uint16_t expected_tseg_mbytes; }; typedef struct TsegSizeArgs TsegSizeArgs; static const TsegSizeArgs tseg_1mb = { .esmramc_tseg_sz = MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_1MB, .extended_tseg_mbytes = 0, .expected_tseg_mbytes = 1, }; static const TsegSizeArgs tseg_2mb = { .esmramc_tseg_sz = MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_2MB, .extended_tseg_mbytes = 0, .expected_tseg_mbytes = 2, }; static const TsegSizeArgs tseg_8mb = { .esmramc_tseg_sz = MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_8MB, .extended_tseg_mbytes = 0, .expected_tseg_mbytes = 8, }; static const TsegSizeArgs tseg_ext_16mb = { .esmramc_tseg_sz = MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_MASK, .extended_tseg_mbytes = 16, .expected_tseg_mbytes = 16, }; static void smram_set_bit(QPCIDevice *pcidev, uint8_t mask, bool enabled) { uint8_t smram; smram = qpci_config_readb(pcidev, MCH_HOST_BRIDGE_SMRAM); if (enabled) { smram |= mask; } else { smram &= ~mask; } qpci_config_writeb(pcidev, MCH_HOST_BRIDGE_SMRAM, smram); } static bool smram_test_bit(QPCIDevice *pcidev, uint8_t mask) { uint8_t smram; smram = qpci_config_readb(pcidev, MCH_HOST_BRIDGE_SMRAM); return smram & mask; } static void test_smram_lock(void) { QPCIBus *pcibus; QPCIDevice *pcidev; QDict *response; qtest_start("-M q35"); pcibus = qpci_init_pc(NULL); g_assert(pcibus != NULL); pcidev = qpci_device_find(pcibus, 0); g_assert(pcidev != NULL); /* check open is settable */ smram_set_bit(pcidev, MCH_HOST_BRIDGE_SMRAM_D_OPEN, false); g_assert(smram_test_bit(pcidev, MCH_HOST_BRIDGE_SMRAM_D_OPEN) == false); smram_set_bit(pcidev, MCH_HOST_BRIDGE_SMRAM_D_OPEN, true); g_assert(smram_test_bit(pcidev, MCH_HOST_BRIDGE_SMRAM_D_OPEN) == true); /* lock, check open is cleared & not settable */ smram_set_bit(pcidev, MCH_HOST_BRIDGE_SMRAM_D_LCK, true); g_assert(smram_test_bit(pcidev, MCH_HOST_BRIDGE_SMRAM_D_OPEN) == false); smram_set_bit(pcidev, MCH_HOST_BRIDGE_SMRAM_D_OPEN, true); g_assert(smram_test_bit(pcidev, MCH_HOST_BRIDGE_SMRAM_D_OPEN) == false); /* reset */ response = qmp("{'execute': 'system_reset', 'arguments': {} }"); g_assert(response); g_assert(!qdict_haskey(response, "error")); QDECREF(response); /* check open is settable again */ smram_set_bit(pcidev, MCH_HOST_BRIDGE_SMRAM_D_OPEN, false); g_assert(smram_test_bit(pcidev, MCH_HOST_BRIDGE_SMRAM_D_OPEN) == false); smram_set_bit(pcidev, MCH_HOST_BRIDGE_SMRAM_D_OPEN, true); g_assert(smram_test_bit(pcidev, MCH_HOST_BRIDGE_SMRAM_D_OPEN) == true); g_free(pcidev); qpci_free_pc(pcibus); qtest_end(); } static void test_tseg_size(const void *data) { const TsegSizeArgs *args = data; char *cmdline; QPCIBus *pcibus; QPCIDevice *pcidev; uint8_t smram_val; uint8_t esmramc_val; uint32_t ram_offs; if (args->esmramc_tseg_sz == MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_MASK) { cmdline = g_strdup_printf("-M q35 -m %uM " "-global mch.extended-tseg-mbytes=%u", TSEG_SIZE_TEST_GUEST_RAM_MBYTES, args->extended_tseg_mbytes); } else { cmdline = g_strdup_printf("-M q35 -m %uM", TSEG_SIZE_TEST_GUEST_RAM_MBYTES); } qtest_start(cmdline); g_free(cmdline); /* locate the DRAM controller */ pcibus = qpci_init_pc(NULL); g_assert(pcibus != NULL); pcidev = qpci_device_find(pcibus, 0); g_assert(pcidev != NULL); /* Set TSEG size. Restrict TSEG visibility to SMM by setting T_EN. */ esmramc_val = qpci_config_readb(pcidev, MCH_HOST_BRIDGE_ESMRAMC); esmramc_val &= ~MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_MASK; esmramc_val |= args->esmramc_tseg_sz; esmramc_val |= MCH_HOST_BRIDGE_ESMRAMC_T_EN; qpci_config_writeb(pcidev, MCH_HOST_BRIDGE_ESMRAMC, esmramc_val); /* Enable TSEG by setting G_SMRAME. Close TSEG by setting D_CLS. */ smram_val = qpci_config_readb(pcidev, MCH_HOST_BRIDGE_SMRAM); smram_val &= ~(MCH_HOST_BRIDGE_SMRAM_D_OPEN | MCH_HOST_BRIDGE_SMRAM_D_LCK); smram_val |= (MCH_HOST_BRIDGE_SMRAM_D_CLS | MCH_HOST_BRIDGE_SMRAM_G_SMRAME); qpci_config_writeb(pcidev, MCH_HOST_BRIDGE_SMRAM, smram_val); /* lock TSEG */ smram_val |= MCH_HOST_BRIDGE_SMRAM_D_LCK; qpci_config_writeb(pcidev, MCH_HOST_BRIDGE_SMRAM, smram_val); /* Now check that the byte right before the TSEG is r/w, and that the first * byte in the TSEG always reads as 0xff. */ ram_offs = (TSEG_SIZE_TEST_GUEST_RAM_MBYTES - args->expected_tseg_mbytes) * 1024 * 1024 - 1; g_assert_cmpint(readb(ram_offs), ==, 0); writeb(ram_offs, 1); g_assert_cmpint(readb(ram_offs), ==, 1); ram_offs++; g_assert_cmpint(readb(ram_offs), ==, 0xff); writeb(ram_offs, 1); g_assert_cmpint(readb(ram_offs), ==, 0xff); g_free(pcidev); qpci_free_pc(pcibus); qtest_end(); } int main(int argc, char **argv) { g_test_init(&argc, &argv, NULL); qtest_add_func("/q35/smram/lock", test_smram_lock); qtest_add_data_func("/q35/tseg-size/1mb", &tseg_1mb, test_tseg_size); qtest_add_data_func("/q35/tseg-size/2mb", &tseg_2mb, test_tseg_size); qtest_add_data_func("/q35/tseg-size/8mb", &tseg_8mb, test_tseg_size); qtest_add_data_func("/q35/tseg-size/ext/16mb", &tseg_ext_16mb, test_tseg_size); return g_test_run(); }