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Xen queue:

Browse Source 
* In Xen PCI passthrough, emulate multifunction bit.
 * Fix in Xen mapcache.
 * Improve performance of kernel+initrd loading in an Xen HVM Direct
   Kernel Boot scenario.
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Merge tag 'pull-xen-20240312' of https://xenbits.xen.org/git-http/people/aperard/qemu-dm into staging

Xen queue:

* In Xen PCI passthrough, emulate multifunction bit.
* Fix in Xen mapcache.
* Improve performance of kernel+initrd loading in an Xen HVM Direct
  Kernel Boot scenario.

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# gpg: Signature made Tue 12 Mar 2024 14:25:00 GMT
# gpg:                using RSA key F80C006308E22CFD8A92E7980CF5572FD7FB55AF
# gpg: Good signature from "Anthony PERARD <anthony.perard@gmail.com>" [marginal]
# gpg:                 aka "Anthony PERARD <anthony.perard@citrix.com>" [marginal]
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 5379 2F71 024C 600F 778A  7161 D8D5 7199 DF83 42C8
#      Subkey fingerprint: F80C 0063 08E2 2CFD 8A92  E798 0CF5 572F D7FB 55AF

* tag 'pull-xen-20240312' of https://xenbits.xen.org/git-http/people/aperard/qemu-dm:
  i386: load kernel on xen using DMA
  xen: Drop out of coroutine context xen_invalidate_map_cache_entry
  xen/pt: Emulate multifunction bit in header type

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2024-03-12 21:32:31 +00:00
commit 357ebd2c47
3 changed files with 35 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
hw/i386/pc.c
View File

@ -718,7 +718,8 @@ void xen_load_linux(PCMachineState *pcms)
assert(MACHINE(pcms)->kernel_filename != NULL);
fw_cfg = fw_cfg_init_io(FW_CFG_IO_BASE);
fw_cfg = fw_cfg_init_io_dma(FW_CFG_IO_BASE, FW_CFG_IO_BASE + 4,
&address_space_memory);
fw_cfg_add_i16(fw_cfg, FW_CFG_NB_CPUS, x86ms->boot_cpus);
rom_set_fw(fw_cfg);

30
hw/xen/xen-mapcache.c
View File

@ -476,11 +476,37 @@ static void xen_invalidate_map_cache_entry_unlocked(uint8_t *buffer)
g_free(entry);
}
void xen_invalidate_map_cache_entry(uint8_t *buffer)
typedef struct XenMapCacheData {
Coroutine *co;
uint8_t *buffer;
} XenMapCacheData;
static void xen_invalidate_map_cache_entry_bh(void *opaque)
{
XenMapCacheData *data = opaque;
mapcache_lock();
xen_invalidate_map_cache_entry_unlocked(buffer);
xen_invalidate_map_cache_entry_unlocked(data->buffer);
mapcache_unlock();
aio_co_wake(data->co);
}
void coroutine_mixed_fn xen_invalidate_map_cache_entry(uint8_t *buffer)
{
if (qemu_in_coroutine()) {
XenMapCacheData data = {
.co = qemu_coroutine_self(),
.buffer = buffer,
};
aio_bh_schedule_oneshot(qemu_get_current_aio_context(),
xen_invalidate_map_cache_entry_bh, &data);
qemu_coroutine_yield();
} else {
mapcache_lock();
xen_invalidate_map_cache_entry_unlocked(buffer);
mapcache_unlock();
}
}
void xen_invalidate_map_cache(void)

7
hw/xen/xen_pt_config_init.c
View File

@ -292,7 +292,10 @@ static int xen_pt_header_type_reg_init(XenPCIPassthroughState *s,
uint32_t *data)
{
/* read PCI_HEADER_TYPE */
*data = reg->init_val | 0x80;
*data = reg->init_val;
if ((PCI_DEVICE(s)->cap_present & QEMU_PCI_CAP_MULTIFUNCTION)) {
*data |= PCI_HEADER_TYPE_MULTI_FUNCTION;
}
return 0;
}
@ -677,7 +680,7 @@ static XenPTRegInfo xen_pt_emu_reg_header0[] = {
.size = 1,
.init_val = 0x00,
.ro_mask = 0xFF,
.emu_mask = 0x00,
.emu_mask = PCI_HEADER_TYPE_MULTI_FUNCTION,
.init = xen_pt_header_type_reg_init,
.u.b.read = xen_pt_byte_reg_read,
.u.b.write = xen_pt_byte_reg_write,