From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:57836) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VfhQw-0004Rr-LA for qemu-devel@nongnu.org; Sun, 10 Nov 2013 21:41:04 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1VfhQp-0000be-LK for qemu-devel@nongnu.org; Sun, 10 Nov 2013 21:40:58 -0500 Received: from mx1.redhat.com ([209.132.183.28]:61893) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1VfhQp-0000bE-DR for qemu-devel@nongnu.org; Sun, 10 Nov 2013 21:40:51 -0500 Received: from int-mx12.intmail.prod.int.phx2.redhat.com (int-mx12.intmail.prod.int.phx2.redhat.com [10.5.11.25]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id rAB2en37002164 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Sun, 10 Nov 2013 21:40:49 -0500 Date: Sun, 10 Nov 2013 18:47:53 -0200 From: Marcelo Tosatti Message-ID: <20131110204753.GA11389@amt.cnet> References: <20131024211158.064049176@amt.cnet> <20131024211249.723543071@amt.cnet> <20131106014930.GA20468@amt.cnet> <20131106015543.GA20766@amt.cnet> <20131106213119.GA15543@amt.cnet> <20131107162459.6bdc39d7@nial.usersys.redhat.com> <20131107215304.GA10866@amt.cnet> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20131107215304.GA10866@amt.cnet> Subject: [Qemu-devel] i386: pc: align gpa<->hpa on 1GB boundary (v5) List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Igor Mammedov Cc: aarcange@redhat.com, gleb@redhat.com, "Michael S. Tsirkin" , qemu-devel@nongnu.org, Gerd Hoffmann , pbonzini@redhat.com v2: condition enablement of new mapping to new machine types (Paolo) v3: fix changelog v4: rebase v5: ensure alignment of piecetwo on 2MB GPA (Igor) do not register zero-sized piece-one (Igor) ----- Align guest physical address and host physical address beyond guest 4GB on a 1GB boundary. Otherwise 1GB TLBs cannot be cached for the range. Signed-off-by: Marcelo Tosatti diff --git a/hw/i386/pc.c b/hw/i386/pc.c index 12c436e..abd6b81 100644 --- a/hw/i386/pc.c +++ b/hw/i386/pc.c @@ -1156,8 +1156,9 @@ FWCfgState *pc_memory_init(MemoryRegion *system_memory, { int linux_boot, i; MemoryRegion *ram, *option_rom_mr; - MemoryRegion *ram_below_4g, *ram_above_4g; + MemoryRegion *ram_below_4g, *ram_above_4g, *ram_above_4g_piecetwo; FWCfgState *fw_cfg; + uint64_t memsize, align_offset; linux_boot = (kernel_filename != NULL); @@ -1166,8 +1167,12 @@ FWCfgState *pc_memory_init(MemoryRegion *system_memory, * with older qemus that used qemu_ram_alloc(). */ ram = g_malloc(sizeof(*ram)); - memory_region_init_ram(ram, NULL, "pc.ram", - below_4g_mem_size + above_4g_mem_size); + + memsize = ROUND_UP(below_4g_mem_size + above_4g_mem_size, 1UL << 21); + align_offset = memsize - (below_4g_mem_size + above_4g_mem_size); + + memory_region_init_ram(ram, NULL, "pc.ram", memsize); + vmstate_register_ram_global(ram); *ram_memory = ram; ram_below_4g = g_malloc(sizeof(*ram_below_4g)); @@ -1177,10 +1182,50 @@ FWCfgState *pc_memory_init(MemoryRegion *system_memory, e820_add_entry(0, below_4g_mem_size, E820_RAM); if (above_4g_mem_size > 0) { ram_above_4g = g_malloc(sizeof(*ram_above_4g)); - memory_region_init_alias(ram_above_4g, NULL, "ram-above-4g", ram, - below_4g_mem_size, above_4g_mem_size); - memory_region_add_subregion(system_memory, 0x100000000ULL, + /* + * + * If 1GB hugepages are used to back guest RAM, map guest address + * space in the range [ramsize,ramsize+holesize] to the ram block + * range [holestart, 4GB] + * + * 0 h 4G [ramsize,ramsize+holesize] + * + * guest-addr-space [ ] [ ][xxx] + * /----------/ + * contiguous-ram-block [ ][xxx][ ] + * + * So that memory beyond 4GB is aligned on a 1GB boundary, + * at the host physical address space. + * + */ + if (guest_info->gb_align) { + uint64_t holesize = 0x100000000ULL - below_4g_mem_size; + uint64_t piecetwosize = holesize - align_offset; + + assert(piecetwosize <= holesize); + + if ((above_4g_mem_size - piecetwosize) > 0) { + memory_region_init_alias(ram_above_4g, NULL, "ram-above-4g", + ram, 0x100000000ULL, + above_4g_mem_size - piecetwosize); + memory_region_add_subregion(system_memory, 0x100000000ULL, + ram_above_4g); + } + + ram_above_4g_piecetwo = g_malloc(sizeof(*ram_above_4g_piecetwo)); + memory_region_init_alias(ram_above_4g_piecetwo, NULL, + "ram-above-4g-piecetwo", ram, + 0x100000000ULL - holesize, piecetwosize); + memory_region_add_subregion(system_memory, + 0x100000000ULL + + above_4g_mem_size - piecetwosize, + ram_above_4g_piecetwo); + } else { + memory_region_init_alias(ram_above_4g, NULL, "ram-above-4g", ram, + below_4g_mem_size, above_4g_mem_size); + memory_region_add_subregion(system_memory, 0x100000000ULL, ram_above_4g); + } e820_add_entry(0x100000000ULL, above_4g_mem_size, E820_RAM); } diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c index 4fdb7b6..686736e 100644 --- a/hw/i386/pc_piix.c +++ b/hw/i386/pc_piix.c @@ -60,6 +60,7 @@ static const int ide_irq[MAX_IDE_BUS] = { 14, 15 }; static bool has_pvpanic; static bool has_pci_info = true; static bool has_acpi_build = true; +static bool gb_align = true; /* PC hardware initialisation */ static void pc_init1(QEMUMachineInitArgs *args, @@ -128,6 +129,7 @@ static void pc_init1(QEMUMachineInitArgs *args, guest_info->has_pci_info = has_pci_info; guest_info->isapc_ram_fw = !pci_enabled; + guest_info->gb_align = gb_align; /* allocate ram and load rom/bios */ if (!xen_enabled()) { @@ -240,8 +242,14 @@ static void pc_init_pci(QEMUMachineInitArgs *args) pc_init1(args, 1, 1); } +static void pc_compat_1_7(QEMUMachineInitArgs *args) +{ + gb_align = false; +} + static void pc_compat_1_6(QEMUMachineInitArgs *args) { + pc_compat_1_7(args); has_pci_info = false; rom_file_in_ram = false; has_acpi_build = false; @@ -274,6 +282,12 @@ static void pc_compat_1_2(QEMUMachineInitArgs *args) disable_kvm_pv_eoi(); } +static void pc_init_pci_1_7(QEMUMachineInitArgs *args) +{ + pc_compat_1_7(args); + pc_init_pci(args); +} + static void pc_init_pci_1_6(QEMUMachineInitArgs *args) { pc_compat_1_6(args); @@ -346,13 +360,21 @@ static void pc_xen_hvm_init(QEMUMachineInitArgs *args) .desc = "Standard PC (i440FX + PIIX, 1996)", \ .hot_add_cpu = pc_hot_add_cpu +#define PC_I440FX_1_8_MACHINE_OPTIONS PC_I440FX_MACHINE_OPTIONS +static QEMUMachine pc_i440fx_machine_v1_8 = { + PC_I440FX_1_8_MACHINE_OPTIONS, + .name = "pc-i440fx-1.8", + .alias = "pc", + .init = pc_init_pci, + .is_default = 1, +}; + #define PC_I440FX_1_7_MACHINE_OPTIONS PC_I440FX_MACHINE_OPTIONS static QEMUMachine pc_i440fx_machine_v1_7 = { PC_I440FX_1_7_MACHINE_OPTIONS, .name = "pc-i440fx-1.7", .alias = "pc", - .init = pc_init_pci, - .is_default = 1, + .init = pc_init_pci_1_7, }; #define PC_I440FX_1_6_MACHINE_OPTIONS PC_I440FX_MACHINE_OPTIONS @@ -754,6 +776,7 @@ static QEMUMachine xenfv_machine = { static void pc_machine_init(void) { + qemu_register_machine(&pc_i440fx_machine_v1_8); qemu_register_machine(&pc_i440fx_machine_v1_7); qemu_register_machine(&pc_i440fx_machine_v1_6); qemu_register_machine(&pc_i440fx_machine_v1_5); diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c index 4c191d3..c2eb568 100644 --- a/hw/i386/pc_q35.c +++ b/hw/i386/pc_q35.c @@ -50,6 +50,7 @@ static bool has_pvpanic; static bool has_pci_info = true; static bool has_acpi_build = true; +static bool gb_align = true; /* PC hardware initialisation */ static void pc_q35_init(QEMUMachineInitArgs *args) @@ -113,6 +114,7 @@ static void pc_q35_init(QEMUMachineInitArgs *args) guest_info->has_pci_info = has_pci_info; guest_info->isapc_ram_fw = false; guest_info->has_acpi_build = has_acpi_build; + guest_info->gb_align = gb_align; /* allocate ram and load rom/bios */ if (!xen_enabled()) { @@ -222,8 +224,14 @@ static void pc_q35_init(QEMUMachineInitArgs *args) } } +static void pc_compat_1_7(QEMUMachineInitArgs *args) +{ + gb_align = false; +} + static void pc_compat_1_6(QEMUMachineInitArgs *args) { + pc_compat_1_7(args); has_pci_info = false; rom_file_in_ram = false; has_acpi_build = false; @@ -243,6 +251,12 @@ static void pc_compat_1_4(QEMUMachineInitArgs *args) x86_cpu_compat_set_features("Westmere", FEAT_1_ECX, 0, CPUID_EXT_PCLMULQDQ); } +static void pc_q35_init_1_7(QEMUMachineInitArgs *args) +{ + pc_compat_1_7(args); + pc_q35_init(args); +} + static void pc_q35_init_1_6(QEMUMachineInitArgs *args) { pc_compat_1_6(args); @@ -266,13 +280,22 @@ static void pc_q35_init_1_4(QEMUMachineInitArgs *args) .desc = "Standard PC (Q35 + ICH9, 2009)", \ .hot_add_cpu = pc_hot_add_cpu +#define PC_Q35_1_8_MACHINE_OPTIONS PC_Q35_MACHINE_OPTIONS + +static QEMUMachine pc_q35_machine_v1_8 = { + PC_Q35_1_8_MACHINE_OPTIONS, + .name = "pc-q35-1.8", + .alias = "q35", + .init = pc_q35_init, +}; + #define PC_Q35_1_7_MACHINE_OPTIONS PC_Q35_MACHINE_OPTIONS static QEMUMachine pc_q35_machine_v1_7 = { PC_Q35_1_7_MACHINE_OPTIONS, .name = "pc-q35-1.7", .alias = "q35", - .init = pc_q35_init, + .init = pc_q35_init_1_7, }; #define PC_Q35_1_6_MACHINE_OPTIONS PC_Q35_MACHINE_OPTIONS @@ -313,6 +336,7 @@ static QEMUMachine pc_q35_machine_v1_4 = { static void pc_q35_machine_init(void) { + qemu_register_machine(&pc_q35_machine_v1_8); qemu_register_machine(&pc_q35_machine_v1_7); qemu_register_machine(&pc_q35_machine_v1_6); qemu_register_machine(&pc_q35_machine_v1_5); diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h index 03cc0ba..35a6885 100644 --- a/include/hw/i386/pc.h +++ b/include/hw/i386/pc.h @@ -41,6 +41,7 @@ struct PcGuestInfo { uint64_t *node_cpu; FWCfgState *fw_cfg; bool has_acpi_build; + bool gb_align; }; /* parallel.c */