Message ID | 1368464653-3842-1-git-send-email-jordan.l.justen@intel.com |
---|---|
State | New |
Headers | show |
Il 13/05/2013 19:04, Jordan Justen ha scritto: > The isapc machine with seabios currently requires the BIOS region > to be read/write memory rather than read-only memory. > > KVM currently cannot support the BIOS as a ROM region, but qemu > in non-KVM mode can. Based on this, isapc machine currently only > works with KVM. > > To work-around this isapc issue, this change avoids marking the > BIOS as readonly for isapc. > > This change also will allow KVM to start supporting ROM mode > via KVM_CAP_READONLY_MEM. > > Signed-off-by: Jordan Justen <jordan.l.justen@intel.com> > Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> > --- > v2: > * Fix build issue with this patch. Apologies for not testing > this patch outside of my kvm-flash series. Not your fault, it conflicted semantically with another patch that was committed in the meanwhile. Paolo > hw/block/pc_sysfw.c | 16 +++++++++++----- > hw/i386/pc_piix.c | 5 +++++ > 2 files changed, 16 insertions(+), 5 deletions(-) > > diff --git a/hw/block/pc_sysfw.c b/hw/block/pc_sysfw.c > index aad8614..a02f320 100644 > --- a/hw/block/pc_sysfw.c > +++ b/hw/block/pc_sysfw.c > @@ -39,6 +39,7 @@ > typedef struct PcSysFwDevice { > SysBusDevice busdev; > uint8_t rom_only; > + uint8_t isapc_ram_fw; > } PcSysFwDevice; > > static void pc_isa_bios_init(MemoryRegion *rom_memory, > @@ -139,7 +140,7 @@ static void pc_system_flash_init(MemoryRegion *rom_memory, > pc_isa_bios_init(rom_memory, flash_mem, size); > } > > -static void old_pc_system_rom_init(MemoryRegion *rom_memory) > +static void old_pc_system_rom_init(MemoryRegion *rom_memory, bool isapc_ram_fw) > { > char *filename; > MemoryRegion *bios, *isa_bios; > @@ -163,7 +164,9 @@ static void old_pc_system_rom_init(MemoryRegion *rom_memory) > bios = g_malloc(sizeof(*bios)); > memory_region_init_ram(bios, "pc.bios", bios_size); > vmstate_register_ram_global(bios); > - memory_region_set_readonly(bios, true); > + if (!isapc_ram_fw) { > + memory_region_set_readonly(bios, true); > + } > ret = rom_add_file_fixed(bios_name, (uint32_t)(-bios_size), -1); > if (ret != 0) { > bios_error: > @@ -186,7 +189,9 @@ static void old_pc_system_rom_init(MemoryRegion *rom_memory) > 0x100000 - isa_bios_size, > isa_bios, > 1); > - memory_region_set_readonly(isa_bios, true); > + if (!isapc_ram_fw) { > + memory_region_set_readonly(isa_bios, true); > + } > > /* map all the bios at the top of memory */ > memory_region_add_subregion(rom_memory, > @@ -216,7 +221,7 @@ void pc_system_firmware_init(MemoryRegion *rom_memory) > qdev_init_nofail(DEVICE(sysfw_dev)); > > if (sysfw_dev->rom_only) { > - old_pc_system_rom_init(rom_memory); > + old_pc_system_rom_init(rom_memory, sysfw_dev->isapc_ram_fw); > return; > } > > @@ -234,7 +239,7 @@ void pc_system_firmware_init(MemoryRegion *rom_memory) > exit(1); > } else { > sysfw_dev->rom_only = 1; > - old_pc_system_rom_init(rom_memory); > + old_pc_system_rom_init(rom_memory, sysfw_dev->isapc_ram_fw); > return; > } > } > @@ -255,6 +260,7 @@ void pc_system_firmware_init(MemoryRegion *rom_memory) > } > > static Property pcsysfw_properties[] = { > + DEFINE_PROP_UINT8("isapc_ram_fw", PcSysFwDevice, isapc_ram_fw, 0), > DEFINE_PROP_UINT8("rom_only", PcSysFwDevice, rom_only, 1), > DEFINE_PROP_END_OF_LIST(), > }; > diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c > index f7c80ad..c1a49ec 100644 > --- a/hw/i386/pc_piix.c > +++ b/hw/i386/pc_piix.c > @@ -716,6 +716,11 @@ static QEMUMachine isapc_machine = { > .property = "rom_only", > .value = stringify(1), > }, > + { > + .driver = "pc-sysfw", > + .property = "isapc_ram_fw", > + .value = stringify(1), > + }, > { /* end of list */ } > }, > DEFAULT_MACHINE_OPTIONS, >
Jordan Justen <jordan.l.justen@intel.com> writes: > The isapc machine with seabios currently requires the BIOS region > to be read/write memory rather than read-only memory. > > KVM currently cannot support the BIOS as a ROM region, but qemu > in non-KVM mode can. Based on this, isapc machine currently only > works with KVM. > > To work-around this isapc issue, this change avoids marking the > BIOS as readonly for isapc. > > This change also will allow KVM to start supporting ROM mode > via KVM_CAP_READONLY_MEM. > > Signed-off-by: Jordan Justen <jordan.l.justen@intel.com> > Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> > --- > v2: > * Fix build issue with this patch. Apologies for not testing > this patch outside of my kvm-flash series. This needs to be rebased post-Paolo's revert. Make sure you've got at least: commit 9e1c2ec8fd8d9a9ee299ea86c5f6c986fe25e838 Author: Paolo Bonzini <pbonzini@redhat.com> Date: Fri May 10 14:38:03 2013 +0200 Revert "pc: Kill the "use flash device for BIOS unless KVM" misfeature" Regards, Anthony Liguori > > hw/block/pc_sysfw.c | 16 +++++++++++----- > hw/i386/pc_piix.c | 5 +++++ > 2 files changed, 16 insertions(+), 5 deletions(-) > > diff --git a/hw/block/pc_sysfw.c b/hw/block/pc_sysfw.c > index aad8614..a02f320 100644 > --- a/hw/block/pc_sysfw.c > +++ b/hw/block/pc_sysfw.c > @@ -39,6 +39,7 @@ > typedef struct PcSysFwDevice { > SysBusDevice busdev; > uint8_t rom_only; > + uint8_t isapc_ram_fw; > } PcSysFwDevice; > > static void pc_isa_bios_init(MemoryRegion *rom_memory, > @@ -139,7 +140,7 @@ static void pc_system_flash_init(MemoryRegion *rom_memory, > pc_isa_bios_init(rom_memory, flash_mem, size); > } > > -static void old_pc_system_rom_init(MemoryRegion *rom_memory) > +static void old_pc_system_rom_init(MemoryRegion *rom_memory, bool isapc_ram_fw) > { > char *filename; > MemoryRegion *bios, *isa_bios; > @@ -163,7 +164,9 @@ static void old_pc_system_rom_init(MemoryRegion *rom_memory) > bios = g_malloc(sizeof(*bios)); > memory_region_init_ram(bios, "pc.bios", bios_size); > vmstate_register_ram_global(bios); > - memory_region_set_readonly(bios, true); > + if (!isapc_ram_fw) { > + memory_region_set_readonly(bios, true); > + } > ret = rom_add_file_fixed(bios_name, (uint32_t)(-bios_size), -1); > if (ret != 0) { > bios_error: > @@ -186,7 +189,9 @@ static void old_pc_system_rom_init(MemoryRegion *rom_memory) > 0x100000 - isa_bios_size, > isa_bios, > 1); > - memory_region_set_readonly(isa_bios, true); > + if (!isapc_ram_fw) { > + memory_region_set_readonly(isa_bios, true); > + } > > /* map all the bios at the top of memory */ > memory_region_add_subregion(rom_memory, > @@ -216,7 +221,7 @@ void pc_system_firmware_init(MemoryRegion *rom_memory) > qdev_init_nofail(DEVICE(sysfw_dev)); > > if (sysfw_dev->rom_only) { > - old_pc_system_rom_init(rom_memory); > + old_pc_system_rom_init(rom_memory, sysfw_dev->isapc_ram_fw); > return; > } > > @@ -234,7 +239,7 @@ void pc_system_firmware_init(MemoryRegion *rom_memory) > exit(1); > } else { > sysfw_dev->rom_only = 1; > - old_pc_system_rom_init(rom_memory); > + old_pc_system_rom_init(rom_memory, sysfw_dev->isapc_ram_fw); > return; > } > } > @@ -255,6 +260,7 @@ void pc_system_firmware_init(MemoryRegion *rom_memory) > } > > static Property pcsysfw_properties[] = { > + DEFINE_PROP_UINT8("isapc_ram_fw", PcSysFwDevice, isapc_ram_fw, 0), > DEFINE_PROP_UINT8("rom_only", PcSysFwDevice, rom_only, 1), > DEFINE_PROP_END_OF_LIST(), > }; > diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c > index f7c80ad..c1a49ec 100644 > --- a/hw/i386/pc_piix.c > +++ b/hw/i386/pc_piix.c > @@ -716,6 +716,11 @@ static QEMUMachine isapc_machine = { > .property = "rom_only", > .value = stringify(1), > }, > + { > + .driver = "pc-sysfw", > + .property = "isapc_ram_fw", > + .value = stringify(1), > + }, > { /* end of list */ } > }, > DEFAULT_MACHINE_OPTIONS, > -- > 1.7.10.4
On Tue, May 14, 2013 at 7:57 AM, Anthony Liguori <anthony@codemonkey.ws> wrote: > Jordan Justen <jordan.l.justen@intel.com> writes: > >> The isapc machine with seabios currently requires the BIOS region >> to be read/write memory rather than read-only memory. >> >> KVM currently cannot support the BIOS as a ROM region, but qemu >> in non-KVM mode can. Based on this, isapc machine currently only >> works with KVM. >> >> To work-around this isapc issue, this change avoids marking the >> BIOS as readonly for isapc. >> >> This change also will allow KVM to start supporting ROM mode >> via KVM_CAP_READONLY_MEM. >> >> Signed-off-by: Jordan Justen <jordan.l.justen@intel.com> >> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> >> --- >> v2: >> * Fix build issue with this patch. Apologies for not testing >> this patch outside of my kvm-flash series. > > This needs to be rebased post-Paolo's revert. > > Make sure you've got at least: > > commit 9e1c2ec8fd8d9a9ee299ea86c5f6c986fe25e838 > Author: Paolo Bonzini <pbonzini@redhat.com> > Date: Fri May 10 14:38:03 2013 +0200 > > Revert "pc: Kill the "use flash device for BIOS unless KVM" misfeature" I re-posted this as Patch 1 in v6 of my kvm-flash series. -Jordan
Applied. Thanks. Regards, Anthony Liguori
diff --git a/hw/block/pc_sysfw.c b/hw/block/pc_sysfw.c index aad8614..a02f320 100644 --- a/hw/block/pc_sysfw.c +++ b/hw/block/pc_sysfw.c @@ -39,6 +39,7 @@ typedef struct PcSysFwDevice { SysBusDevice busdev; uint8_t rom_only; + uint8_t isapc_ram_fw; } PcSysFwDevice; static void pc_isa_bios_init(MemoryRegion *rom_memory, @@ -139,7 +140,7 @@ static void pc_system_flash_init(MemoryRegion *rom_memory, pc_isa_bios_init(rom_memory, flash_mem, size); } -static void old_pc_system_rom_init(MemoryRegion *rom_memory) +static void old_pc_system_rom_init(MemoryRegion *rom_memory, bool isapc_ram_fw) { char *filename; MemoryRegion *bios, *isa_bios; @@ -163,7 +164,9 @@ static void old_pc_system_rom_init(MemoryRegion *rom_memory) bios = g_malloc(sizeof(*bios)); memory_region_init_ram(bios, "pc.bios", bios_size); vmstate_register_ram_global(bios); - memory_region_set_readonly(bios, true); + if (!isapc_ram_fw) { + memory_region_set_readonly(bios, true); + } ret = rom_add_file_fixed(bios_name, (uint32_t)(-bios_size), -1); if (ret != 0) { bios_error: @@ -186,7 +189,9 @@ static void old_pc_system_rom_init(MemoryRegion *rom_memory) 0x100000 - isa_bios_size, isa_bios, 1); - memory_region_set_readonly(isa_bios, true); + if (!isapc_ram_fw) { + memory_region_set_readonly(isa_bios, true); + } /* map all the bios at the top of memory */ memory_region_add_subregion(rom_memory, @@ -216,7 +221,7 @@ void pc_system_firmware_init(MemoryRegion *rom_memory) qdev_init_nofail(DEVICE(sysfw_dev)); if (sysfw_dev->rom_only) { - old_pc_system_rom_init(rom_memory); + old_pc_system_rom_init(rom_memory, sysfw_dev->isapc_ram_fw); return; } @@ -234,7 +239,7 @@ void pc_system_firmware_init(MemoryRegion *rom_memory) exit(1); } else { sysfw_dev->rom_only = 1; - old_pc_system_rom_init(rom_memory); + old_pc_system_rom_init(rom_memory, sysfw_dev->isapc_ram_fw); return; } } @@ -255,6 +260,7 @@ void pc_system_firmware_init(MemoryRegion *rom_memory) } static Property pcsysfw_properties[] = { + DEFINE_PROP_UINT8("isapc_ram_fw", PcSysFwDevice, isapc_ram_fw, 0), DEFINE_PROP_UINT8("rom_only", PcSysFwDevice, rom_only, 1), DEFINE_PROP_END_OF_LIST(), }; diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c index f7c80ad..c1a49ec 100644 --- a/hw/i386/pc_piix.c +++ b/hw/i386/pc_piix.c @@ -716,6 +716,11 @@ static QEMUMachine isapc_machine = { .property = "rom_only", .value = stringify(1), }, + { + .driver = "pc-sysfw", + .property = "isapc_ram_fw", + .value = stringify(1), + }, { /* end of list */ } }, DEFAULT_MACHINE_OPTIONS,