From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:35162) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1bx7KH-0007kv-CD for qemu-devel@nongnu.org; Thu, 20 Oct 2016 02:59:42 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1bx7KG-0002bb-DI for qemu-devel@nongnu.org; Thu, 20 Oct 2016 02:59:41 -0400 From: Nicholas Piggin Date: Thu, 20 Oct 2016 17:59:12 +1100 Message-Id: <20161020065912.16132-4-npiggin@gmail.com> In-Reply-To: <20161020065912.16132-1-npiggin@gmail.com> References: <20161020065912.16132-1-npiggin@gmail.com> Subject: [Qemu-devel] [PATCH 3/3] ppc/spapr: implement H_SIGNAL_SYS_RESET List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Nicholas Piggin , qemu-ppc@nongnu.org, Alexey Kardashevskiy , David Gibson , Alexander Graf The H_SIGNAL_SYS_RESET hcall allows a guest CPU to raise a system reset exception on other CPUs in the same guest. Signed-off-by: Nicholas Piggin --- hw/ppc/spapr_hcall.c | 42 ++++++++++++++++++++++++++++++++++++++++++ include/hw/ppc/spapr.h | 8 +++++++- 2 files changed, 49 insertions(+), 1 deletion(-) diff --git a/hw/ppc/spapr_hcall.c b/hw/ppc/spapr_hcall.c index c5e7e8c..5ae84f0 100644 --- a/hw/ppc/spapr_hcall.c +++ b/hw/ppc/spapr_hcall.c @@ -880,6 +880,47 @@ static target_ulong h_set_mode(PowerPCCPU *cpu, sPAPRMachineState *spapr, return ret; } +static void do_sys_reset(CPUState *cs, void *arg) +{ + cpu_synchronize_state(cs); + ppc_cpu_do_system_reset(cs); +} + +static target_ulong h_signal_sys_reset(PowerPCCPU *cpu, + sPAPRMachineState *spapr, + target_ulong opcode, target_ulong *args) +{ + target_long target = args[0]; + CPUState *cs; + + if (target < H_SIGNAL_SYS_RESET_ALLBUTSELF) { + return H_PARAMETER; + } + + CPU_FOREACH(cs) { + PowerPCCPU *c = POWERPC_CPU(cs); + + if (cpu->cpu_dt_id == target) { + run_on_cpu(cs, do_sys_reset, NULL); + return H_SUCCESS; + } + + if (target == H_SIGNAL_SYS_RESET_ALLBUTSELF) { + if (c == cpu) { + continue; + } + } + + run_on_cpu(cs, do_sys_reset, NULL); + } + + if (target >= 0) { + return H_PARAMETER; + } + + return H_SUCCESS; +} + /* * Return the offset to the requested option vector @vector in the * option vector table @table. @@ -1113,6 +1154,7 @@ static void hypercall_register_types(void) /* hcall-splpar */ spapr_register_hypercall(H_REGISTER_VPA, h_register_vpa); spapr_register_hypercall(H_CEDE, h_cede); + spapr_register_hypercall(H_SIGNAL_SYS_RESET, h_signal_sys_reset); /* processor register resource access h-calls */ spapr_register_hypercall(H_SET_SPRG0, h_set_sprg0); diff --git a/include/hw/ppc/spapr.h b/include/hw/ppc/spapr.h index aeaba3e..a28538b 100644 --- a/include/hw/ppc/spapr.h +++ b/include/hw/ppc/spapr.h @@ -339,7 +339,13 @@ struct sPAPRMachineState { #define H_XIRR_X 0x2FC #define H_RANDOM 0x300 #define H_SET_MODE 0x31C -#define MAX_HCALL_OPCODE H_SET_MODE +#define H_SIGNAL_SYS_RESET 0x380 +#define MAX_HCALL_OPCODE H_SIGNAL_SYS_RESET + +/* Parameters to H_SIGNAL_SYS_RESET */ +#define H_SIGNAL_SYS_RESET_ALL -1 +#define H_SIGNAL_SYS_RESET_ALLBUTSELF -2 + /* The hcalls above are standardized in PAPR and implemented by pHyp * as well. -- 2.9.3