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Tsirkin" To: qemu-devel@nongnu.org, "Jason A. Donenfeld" Cc: x86@kernel.org, linux-kernel@vger.kernel.org, Dov Murik , Tom Lendacky , Gerd Hoffmann , Daniel P =?utf-8?B?LiBCZXJyYW5nw6k=?= , Paolo Bonzini , Richard Henderson , "H . Peter Anvin" , Philippe =?utf-8?Q?Mathieu-Daud=C3=A9?= , Nathan Chancellor , Borislav Petkov , Eric Biggers , Marcel Apfelbaum , Eduardo Habkost Subject: [PATCH RFC 6/7] Revert "x86: return modified setup_data only if read as memory, not as file" Message-ID: <20230208211212.41951-7-mst@redhat.com> References: <20230208211212.41951-1-mst@redhat.com> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: <20230208211212.41951-1-mst@redhat.com> X-Mailer: git-send-email 2.27.0.106.g8ac3dc51b1 X-Mutt-Fcc: =sent Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=mst@redhat.com; helo=us-smtp-delivery-124.mimecast.com 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, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, 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+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1675890823024100007 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" This reverts commit e935b735085dfa61d8e6d276b6f9e7687796a3c7. Fixes: e935b73508 ("x86: return modified setup_data only if read as memory,= not as file") Signed-off-by: Michael S. Tsirkin Reviewed-by: Daniel P. Berrang=C3=A9 --- include/hw/nvram/fw_cfg.h | 22 ------------------- hw/i386/x86.c | 46 +++++++++------------------------------ hw/nvram/fw_cfg.c | 12 +++++----- 3 files changed, 16 insertions(+), 64 deletions(-) diff --git a/include/hw/nvram/fw_cfg.h b/include/hw/nvram/fw_cfg.h index 2e503904dc..c1f81a5f13 100644 --- a/include/hw/nvram/fw_cfg.h +++ b/include/hw/nvram/fw_cfg.h @@ -117,28 +117,6 @@ struct FWCfgMemState { */ void fw_cfg_add_bytes(FWCfgState *s, uint16_t key, void *data, size_t len); =20 -/** - * fw_cfg_add_bytes_callback: - * @s: fw_cfg device being modified - * @key: selector key value for new fw_cfg item - * @select_cb: callback function when selecting - * @write_cb: callback function after a write - * @callback_opaque: argument to be passed into callback function - * @data: pointer to start of item data - * @len: size of item data - * @read_only: is file read only - * - * Add a new fw_cfg item, available by selecting the given key, as a raw - * "blob" of the given size. The data referenced by the starting pointer - * is only linked, NOT copied, into the data structure of the fw_cfg devic= e. - */ -void fw_cfg_add_bytes_callback(FWCfgState *s, uint16_t key, - FWCfgCallback select_cb, - FWCfgWriteCallback write_cb, - void *callback_opaque, - void *data, size_t len, - bool read_only); - /** * fw_cfg_add_string: * @s: fw_cfg device being modified diff --git a/hw/i386/x86.c b/hw/i386/x86.c index 76b12108b4..4831193c86 100644 --- a/hw/i386/x86.c +++ b/hw/i386/x86.c @@ -37,7 +37,6 @@ #include "sysemu/whpx.h" #include "sysemu/numa.h" #include "sysemu/replay.h" -#include "sysemu/reset.h" #include "sysemu/sysemu.h" #include "sysemu/cpu-timers.h" #include "sysemu/xen.h" @@ -769,24 +768,6 @@ static bool load_elfboot(const char *kernel_filename, return true; } =20 -typedef struct SetupDataFixup { - void *pos; - hwaddr orig_val, new_val; - uint32_t addr; -} SetupDataFixup; - -static void fixup_setup_data(void *opaque) -{ - SetupDataFixup *fixup =3D opaque; - stq_p(fixup->pos, fixup->new_val); -} - -static void reset_setup_data(void *opaque) -{ - SetupDataFixup *fixup =3D opaque; - stq_p(fixup->pos, fixup->orig_val); -} - void x86_load_linux(X86MachineState *x86ms, FWCfgState *fw_cfg, int acpi_data_size, @@ -1111,11 +1092,8 @@ void x86_load_linux(X86MachineState *x86ms, qemu_guest_getrandom_nofail(setup_data->data, RNG_SEED_LENGTH); } =20 - fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ADDR, prot_addr); - fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_SIZE, kernel_size); - fw_cfg_add_bytes(fw_cfg, FW_CFG_KERNEL_DATA, kernel, kernel_size); - sev_load_ctx.kernel_data =3D (char *)kernel; - sev_load_ctx.kernel_size =3D kernel_size; + /* Offset 0x250 is a pointer to the first setup_data link. */ + stq_p(header + 0x250, first_setup_data); =20 /* * If we're starting an encrypted VM, it will be OVMF based, which use= s the @@ -1125,20 +1103,16 @@ void x86_load_linux(X86MachineState *x86ms, * file the user passed in. */ if (!sev_enabled()) { - SetupDataFixup *fixup =3D g_malloc(sizeof(*fixup)); - memcpy(setup, header, MIN(sizeof(header), setup_size)); - /* Offset 0x250 is a pointer to the first setup_data link. */ - fixup->pos =3D setup + 0x250; - fixup->orig_val =3D ldq_p(fixup->pos); - fixup->new_val =3D first_setup_data; - fixup->addr =3D cpu_to_le32(real_addr); - fw_cfg_add_bytes_callback(fw_cfg, FW_CFG_SETUP_ADDR, fixup_setup_d= ata, NULL, - fixup, &fixup->addr, sizeof(fixup->addr)= , true); - qemu_register_reset(reset_setup_data, fixup); - } else { - fw_cfg_add_i32(fw_cfg, FW_CFG_SETUP_ADDR, real_addr); } + + fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_ADDR, prot_addr); + fw_cfg_add_i32(fw_cfg, FW_CFG_KERNEL_SIZE, kernel_size); + fw_cfg_add_bytes(fw_cfg, FW_CFG_KERNEL_DATA, kernel, kernel_size); + sev_load_ctx.kernel_data =3D (char *)kernel; + sev_load_ctx.kernel_size =3D kernel_size; + + fw_cfg_add_i32(fw_cfg, FW_CFG_SETUP_ADDR, real_addr); fw_cfg_add_i32(fw_cfg, FW_CFG_SETUP_SIZE, setup_size); fw_cfg_add_bytes(fw_cfg, FW_CFG_SETUP_DATA, setup, setup_size); sev_load_ctx.setup_data =3D (char *)setup; diff --git a/hw/nvram/fw_cfg.c b/hw/nvram/fw_cfg.c index a00881bc64..29a5bef1d5 100644 --- a/hw/nvram/fw_cfg.c +++ b/hw/nvram/fw_cfg.c @@ -693,12 +693,12 @@ static const VMStateDescription vmstate_fw_cfg =3D { } }; =20 -void fw_cfg_add_bytes_callback(FWCfgState *s, uint16_t key, - FWCfgCallback select_cb, - FWCfgWriteCallback write_cb, - void *callback_opaque, - void *data, size_t len, - bool read_only) +static void fw_cfg_add_bytes_callback(FWCfgState *s, uint16_t key, + FWCfgCallback select_cb, + FWCfgWriteCallback write_cb, + void *callback_opaque, + void *data, size_t len, + bool read_only) { int arch =3D !!(key & FW_CFG_ARCH_LOCAL); =20 --=20 MST