From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:43786) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Y3OcR-00028N-5Y for qemu-devel@nongnu.org; Tue, 23 Dec 2014 07:31:31 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Y3OcH-00052K-Sn for qemu-devel@nongnu.org; Tue, 23 Dec 2014 07:31:19 -0500 Received: from e33.co.us.ibm.com ([32.97.110.151]:52995) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Y3OcH-000527-NS for qemu-devel@nongnu.org; Tue, 23 Dec 2014 07:31:09 -0500 Received: from /spool/local by e33.co.us.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Tue, 23 Dec 2014 05:31:09 -0700 From: Michael Roth Date: Tue, 23 Dec 2014 06:30:23 -0600 Message-Id: <1419337831-16552-10-git-send-email-mdroth@linux.vnet.ibm.com> In-Reply-To: <1419337831-16552-1-git-send-email-mdroth@linux.vnet.ibm.com> References: <1419337831-16552-1-git-send-email-mdroth@linux.vnet.ibm.com> Subject: [Qemu-devel] [PATCH v4 09/17] spapr_events: event-scan RTAS interface List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: aik@ozlabs.ru, agraf@suse.de, ncmike@ncultra.org, qemu-ppc@nongnu.org, tyreld@linux.vnet.ibm.com, bharata.rao@gmail.com, nfont@linux.vnet.ibm.com From: Tyrel Datwyler We don't actually rely on this interface to surface hotplug events, and instead rely on the similar-but-interrupt-driven check-exception RTAS interface used for EPOW events. However, the existence of this interface is needed to ensure guest kernels initialize the event-reporting interfaces which will in turn be used by userspace tools to handle these events, so we implement this interface as a stub. Signed-off-by: Tyrel Datwyler Signed-off-by: Michael Roth --- hw/ppc/spapr.c | 1 + hw/ppc/spapr_events.c | 9 +++++++++ include/hw/ppc/spapr.h | 2 ++ 3 files changed, 12 insertions(+) diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c index 1bc5773..a611616 100644 --- a/hw/ppc/spapr.c +++ b/hw/ppc/spapr.c @@ -541,6 +541,7 @@ static void *spapr_create_fdt_skel(hwaddr initrd_base, refpoints, sizeof(refpoints)))); _FDT((fdt_property_cell(fdt, "rtas-error-log-max", RTAS_ERROR_LOG_MAX))); + _FDT((fdt_property_cell(fdt, "rtas-event-scan-rate", RTAS_EVENT_SCAN_RATE))); /* * According to PAPR, rtas ibm,os-term does not guarantee a return diff --git a/hw/ppc/spapr_events.c b/hw/ppc/spapr_events.c index ebbf3a4..434a75d 100644 --- a/hw/ppc/spapr_events.c +++ b/hw/ppc/spapr_events.c @@ -445,6 +445,14 @@ static void check_exception(PowerPCCPU *cpu, sPAPREnvironment *spapr, } } +static void event_scan(PowerPCCPU *cpu, sPAPREnvironment *spapr, + uint32_t token, uint32_t nargs, + target_ulong args, + uint32_t nret, target_ulong rets) +{ + rtas_st(rets, 0, 1); /* no error events found */ +} + void spapr_events_init(sPAPREnvironment *spapr) { spapr->check_exception_irq = xics_alloc(spapr->icp, 0, 0, false); @@ -452,4 +460,5 @@ void spapr_events_init(sPAPREnvironment *spapr) qemu_register_powerdown_notifier(&spapr->epow_notifier); spapr_rtas_register(RTAS_CHECK_EXCEPTION, "check-exception", check_exception); + spapr_rtas_register(RTAS_EVENT_SCAN, "event-scan", event_scan); } diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h index 4d50e74..973193d 100644 --- a/include/hw/ppc/spapr.h +++ b/include/hw/ppc/spapr.h @@ -453,6 +453,8 @@ int spapr_rtas_device_tree_setup(void *fdt, hwaddr rtas_addr, #define RTAS_ERROR_LOG_MAX 2048 +#define RTAS_EVENT_SCAN_RATE 1 + typedef struct sPAPRTCETable sPAPRTCETable; #define TYPE_SPAPR_TCE_TABLE "spapr-tce-table" -- 1.9.1