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Tsirkin" , Bernhard Beschow Subject: [PATCH v3 05/11] exec/ioport: Add portio_list_set_address() Date: Thu, 21 Dec 2023 16:07:44 +0100 Message-ID: <20231221150750.5435-6-shentey@gmail.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231221150750.5435-1-shentey@gmail.com> References: <20231221150750.5435-1-shentey@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable 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=2a00:1450:4864:20::22a; envelope-from=shentey@gmail.com; helo=mail-lj1-x22a.google.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, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 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 @gmail.com) X-ZM-MESSAGEID: 1703171403970100003 Content-Type: text/plain; charset="utf-8" Some SuperI/O devices such as the VIA south bridges or the PC87312 controll= er are able to relocate their SuperI/O functions. Add a convenience function f= or implementing this in the VIA south bridges. This convenience function relies on previous simplifications in exec/ioport which avoids some duplicate synchronization of I/O port base addresses. The naming of the function is inspired by its memory_region_set_address() penda= nt. Signed-off-by: Bernhard Beschow --- docs/devel/migration.rst | 5 +++-- include/exec/ioport.h | 2 ++ system/ioport.c | 19 +++++++++++++++++++ 3 files changed, 24 insertions(+), 2 deletions(-) diff --git a/docs/devel/migration.rst b/docs/devel/migration.rst index ec55089b25..dc35a17461 100644 --- a/docs/devel/migration.rst +++ b/docs/devel/migration.rst @@ -452,10 +452,10 @@ data doesn't match the stored device data well; it al= lows an intermediate temporary structure to be populated with migration data and then transferred to the main structure. =20 -If you use memory API functions that update memory layout outside +If you use memory or portio_list API functions that update memory layout o= utside initialization (i.e., in response to a guest action), this is a strong indication that you need to call these functions in a ``post_load`` callba= ck. -Examples of such memory API functions are: +Examples of such API functions are: =20 - memory_region_add_subregion() - memory_region_del_subregion() @@ -464,6 +464,7 @@ Examples of such memory API functions are: - memory_region_set_enabled() - memory_region_set_address() - memory_region_set_alias_offset() + - portio_list_set_address() =20 Iterative device migration -------------------------- diff --git a/include/exec/ioport.h b/include/exec/ioport.h index 95f1dc30d0..96858e5ac3 100644 --- a/include/exec/ioport.h +++ b/include/exec/ioport.h @@ -54,6 +54,7 @@ typedef struct PortioList { const struct MemoryRegionPortio *ports; Object *owner; struct MemoryRegion *address_space; + uint32_t addr; unsigned nr; struct MemoryRegion **regions; void *opaque; @@ -70,5 +71,6 @@ void portio_list_add(PortioList *piolist, struct MemoryRegion *address_space, uint32_t addr); void portio_list_del(PortioList *piolist); +void portio_list_set_address(PortioList *piolist, uint32_t addr); =20 #endif /* IOPORT_H */ diff --git a/system/ioport.c b/system/ioport.c index a59e58b716..000e0ee1af 100644 --- a/system/ioport.c +++ b/system/ioport.c @@ -133,6 +133,7 @@ void portio_list_init(PortioList *piolist, piolist->nr =3D 0; piolist->regions =3D g_new0(MemoryRegion *, n); piolist->address_space =3D NULL; + piolist->addr =3D 0; piolist->opaque =3D opaque; piolist->owner =3D owner; piolist->name =3D name; @@ -282,6 +283,7 @@ void portio_list_add(PortioList *piolist, unsigned int off_low, off_high, off_last, count; =20 piolist->address_space =3D address_space; + piolist->addr =3D start; =20 /* Handle the first entry specially. */ off_last =3D off_low =3D pio_start->offset; @@ -322,6 +324,23 @@ void portio_list_del(PortioList *piolist) } } =20 +void portio_list_set_address(PortioList *piolist, uint32_t addr) +{ + MemoryRegionPortioList *mrpio; + unsigned i, j; + + for (i =3D 0; i < piolist->nr; ++i) { + mrpio =3D container_of(piolist->regions[i], MemoryRegionPortioList= , mr); + memory_region_set_address(&mrpio->mr, + mrpio->mr.addr - piolist->addr + addr); + for (j =3D 0; mrpio->ports[j].size; ++j) { + mrpio->ports[j].offset +=3D addr - piolist->addr; + } + } + + piolist->addr =3D addr; +} + static void memory_region_portio_list_finalize(Object *obj) { MemoryRegionPortioList *mrpio =3D MEMORY_REGION_PORTIO_LIST(obj); --=20 2.43.0