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Tsirkin" , Cornelia Huck , Marcel Apfelbaum , Sergio Lopez , Eduardo Habkost , Alistair Francis , Peter Xu , David Hildenbrand , Igor Mammedov , Tom Lendacky , Michael Roth , Ani Sinha , =?utf-8?q?J=C3=B6rg_Roedel?= Subject: [PATCH v6 05/16] i386/pc_sysfw: Ensure sysfw flash configuration does not conflict with IGVM Date: Thu, 26 Sep 2024 12:41:54 +0100 Message-ID: <3255767a6d34297ec47f43f9ae9434116d3f17ba.1727341768.git.roy.hopkins@suse.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: References: MIME-Version: 1.0 X-Rspamd-Queue-Id: BAC9B1F863 X-Rspamd-Action: no action X-Spamd-Result: default: False [-4.01 / 50.00]; BAYES_HAM(-3.00)[100.00%]; DWL_DNSWL_MED(-2.00)[suse.com:dkim]; SUSPICIOUS_RECIPS(1.50)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_SHORT(-0.20)[-1.000]; R_DKIM_ALLOW(-0.20)[suse.com:s=susede1]; MIME_GOOD(-0.10)[text/plain]; MX_GOOD(-0.01)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; DKIM_SIGNED(0.00)[suse.com:s=susede1]; FUZZY_BLOCKED(0.00)[rspamd.com]; RCPT_COUNT_TWELVE(0.00)[19]; SPAMHAUS_XBL(0.00)[2a07:de40:b281:104:10:150:64:97:from]; MIME_TRACE(0.00)[0:+]; ARC_NA(0.00)[]; RBL_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:104:10:150:64:97:from]; FREEMAIL_ENVRCPT(0.00)[gmail.com]; FREEMAIL_CC(0.00)[suse.com,redhat.com,gmail.com,habkost.net,alistair23.me,amd.com]; RCVD_COUNT_TWO(0.00)[2]; RECEIVED_SPAMHAUS_BLOCKED_OPENRESOLVER(0.00)[2a07:de40:b281:106:10:150:64:167:received]; FROM_EQ_ENVFROM(0.00)[]; FROM_HAS_DN(0.00)[]; TO_DN_SOME(0.00)[]; TAGGED_RCPT(0.00)[]; R_RATELIMIT(0.00)[to_ip_from(RLgjcjk3igk5en59wt86eb8xw3)]; RCVD_VIA_SMTP_AUTH(0.00)[]; RCVD_TLS_ALL(0.00)[]; DKIM_TRACE(0.00)[suse.com:+]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.com:dkim, suse.com:mid, suse.com:email, imap1.dmz-prg2.suse.org:rdns, imap1.dmz-prg2.suse.org:helo] X-Rspamd-Server: rspamd1.dmz-prg2.suse.org Received-SPF: pass client-ip=2a07:de40:b251:101:10:150:64:2; envelope-from=roy.hopkins@suse.com; helo=smtp-out2.suse.de X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org When using an IGVM file the configuration of the system firmware is defined by IGVM directives contained in the file. In this case the user should not configure any pflash devices. This commit skips initialization of the ROM mode when pflash0 is not set then checks to ensure no pflash devices have been configured when using IGVM, exiting with an error message if this is not the case. Signed-off-by: Roy Hopkins Reviewed-by: Daniel P. Berrangé Reviewed-by: Michael S. Tsirkin Reviewed-by: Stefano Garzarella Reviewed-by: Pankaj Gupta --- hw/i386/pc_sysfw.c | 31 ++++++++++++++++++++++++++++--- 1 file changed, 28 insertions(+), 3 deletions(-) diff --git a/hw/i386/pc_sysfw.c b/hw/i386/pc_sysfw.c index ef80281d28..f5e40b3ef6 100644 --- a/hw/i386/pc_sysfw.c +++ b/hw/i386/pc_sysfw.c @@ -219,7 +219,13 @@ void pc_system_firmware_init(PCMachineState *pcms, BlockBackend *pflash_blk[ARRAY_SIZE(pcms->flash)]; if (!pcmc->pci_enabled) { - x86_bios_rom_init(X86_MACHINE(pcms), "bios.bin", rom_memory, true); + /* + * If an IGVM file is specified then the firmware must be provided + * in the IGVM file. + */ + if (!X86_MACHINE(pcms)->igvm) { + x86_bios_rom_init(X86_MACHINE(pcms), "bios.bin", rom_memory, true); + } return; } @@ -239,8 +245,13 @@ void pc_system_firmware_init(PCMachineState *pcms, } if (!pflash_blk[0]) { - /* Machine property pflash0 not set, use ROM mode */ - x86_bios_rom_init(X86_MACHINE(pcms), "bios.bin", rom_memory, false); + /* + * Machine property pflash0 not set, use ROM mode unless using IGVM, + * in which case the firmware must be provided by the IGVM file. + */ + if (!X86_MACHINE(pcms)->igvm) { + x86_bios_rom_init(X86_MACHINE(pcms), "bios.bin", rom_memory, false); + } } else { if (kvm_enabled() && !kvm_readonly_mem_enabled()) { /* @@ -256,6 +267,20 @@ void pc_system_firmware_init(PCMachineState *pcms, } pc_system_flash_cleanup_unused(pcms); + + /* + * The user should not have specified any pflash devices when using IGVM + * to configure the guest. + */ + if (X86_MACHINE(pcms)->igvm) { + for (i = 0; i < ARRAY_SIZE(pcms->flash); i++) { + if (pcms->flash[i]) { + error_report("pflash devices cannot be configured when " + "using IGVM"); + exit(1); + } + } + } } void x86_firmware_configure(hwaddr gpa, void *ptr, int size)