aboutsummaryrefslogtreecommitdiff
path: root/trace-events
diff options
context:
space:
mode:
authorAlexey Kardashevskiy <aik@ozlabs.ru>2014-05-30 19:34:20 +1000
committerAlexander Graf <agraf@suse.de>2014-06-27 13:48:27 +0200
commit9a321e92343891e30f6fe8bfaad40454ae358bfb (patch)
treea415b9310c7d7a469af6229e085942cc906090b0 /trace-events
parentf32935ea2284fe833fdf4a0d6b2fe423fc08a1b2 (diff)
downloadqemu-9a321e92343891e30f6fe8bfaad40454ae358bfb.zip
qemu-9a321e92343891e30f6fe8bfaad40454ae358bfb.tar.gz
qemu-9a321e92343891e30f6fe8bfaad40454ae358bfb.tar.bz2
spapr_pci: Use XICS interrupt allocator and do not cache interrupts in PHB
Currently SPAPR PHB keeps track of all allocated MSI (here and below MSI stands for both MSI and MSIX) interrupt because XICS used to be unable to reuse interrupts. This is a problem for dynamic MSI reconfiguration which happens when guest reloads a driver or performs PCI hotplug. Another problem is that the existing implementation can enable MSI on 32 devices maximum (SPAPR_MSIX_MAX_DEVS=32) and there is no good reason for that. This makes use of new XICS ability to reuse interrupts. This reorganizes MSI information storage in sPAPRPHBState. Instead of static array of 32 descriptors (one per a PCI function), this patch adds a GHashTable when @config_addr is a key and (first_irq, num) pair is a value. GHashTable can dynamically grow and shrink so the initial limit of 32 devices is gone. This changes migration stream as @msi_table was a static array while new @msi_devs is a dynamic hash table. This adds temporary array which is used for migration, it is populated in "spapr_pci"::pre_save() callback and expanded into the hash table in post_load() callback. Since the destination side does not know the number of MSI-enabled devices in advance and cannot pre-allocate the temporary array to receive migration state, this makes use of new VMSTATE_STRUCT_VARRAY_ALLOC macro which allocates the array automatically. This resets the MSI configuration space when interrupts are released by the ibm,change-msi RTAS call. This fixed traces to be more informative. This changes vmstate_spapr_pci_msi name from "...lsi" to "...msi" which was incorrect by accident. As the internal representation changed, thus bumps migration version number. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> [agraf: drop g_malloc_n usage] Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'trace-events')
-rw-r--r--trace-events5
1 files changed, 3 insertions, 2 deletions
diff --git a/trace-events b/trace-events
index 51c08a7..d071b97 100644
--- a/trace-events
+++ b/trace-events
@@ -1169,12 +1169,13 @@ qxl_render_guest_primary_resized(int32_t width, int32_t height, int32_t stride,
qxl_render_update_area_done(void *cookie) "%p"
# hw/ppc/spapr_pci.c
-spapr_pci_msi(const char *msg, uint32_t n, uint32_t ca) "%s (device#%d, cfg=%x)"
+spapr_pci_msi(const char *msg, uint32_t ca) "%s (cfg=%x)"
spapr_pci_msi_setup(const char *name, unsigned vector, uint64_t addr) "dev\"%s\" vector %u, addr=%"PRIx64
-spapr_pci_rtas_ibm_change_msi(unsigned func, unsigned req) "func %u, requested %u"
+spapr_pci_rtas_ibm_change_msi(unsigned cfg, unsigned func, unsigned req, unsigned first) "cfgaddr %x func %u, requested %u, first irq %u"
spapr_pci_rtas_ibm_query_interrupt_source_number(unsigned ioa, unsigned intr) "queries for #%u, IRQ%u"
spapr_pci_msi_write(uint64_t addr, uint64_t data, uint32_t dt_irq) "@%"PRIx64"<=%"PRIx64" IRQ %u"
spapr_pci_lsi_set(const char *busname, int pin, uint32_t irq) "%s PIN%d IRQ %u"
+spapr_pci_msi_retry(unsigned config_addr, unsigned req_num, unsigned max_irqs) "Guest device at %x asked %u, have only %u"
# hw/intc/xics.c
xics_icp_check_ipi(int server, uint8_t mfrr) "CPU %d can take IPI mfrr=%#x"