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spapr: add hcalls support for the XIVE exploitation interrupt mode
The different XIVE virtualization structures (sources and event queues) are configured with a set of Hypervisor calls : - H_INT_GET_SOURCE_INFO used to obtain the address of the MMIO page of the Event State Buffer (ESB) entry associated with the source. - H_INT_SET_SOURCE_CONFIG assigns a source to a "target". - H_INT_GET_SOURCE_CONFIG determines which "target" and "priority" is assigned to a source - H_INT_GET_QUEUE_INFO returns the address of the notification management page associated with the specified "target" and "priority". - H_INT_SET_QUEUE_CONFIG sets or resets the event queue for a given "target" and "priority". It is also used to set the notification configuration associated with the queue, only unconditional notification is supported for the moment. Reset is performed with a queue size of 0 and queueing is disabled in that case. - H_INT_GET_QUEUE_CONFIG returns the queue settings for a given "target" and "priority". - H_INT_RESET resets all of the guest's internal interrupt structures to their initial state, losing all configuration set via the hcalls H_INT_SET_SOURCE_CONFIG and H_INT_SET_QUEUE_CONFIG. - H_INT_SYNC issue a synchronisation on a source to make sure all notifications have reached their queue. Calls that still need to be addressed : H_INT_SET_OS_REPORTING_LINE H_INT_GET_OS_REPORTING_LINE See the code for more documentation on each hcall. Signed-off-by: Cédric Le Goater <clg@kaod.org> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> [dwg: Folded in fix for field accessors] Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Cédric Le Goater
David Gibson
parent
dcc345b61e
commit
23bcd5eb9a
@ -38,6 +38,13 @@
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#define SPAPR_XIVE_NVT_BASE 0x400
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/*
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* The sPAPR machine has a unique XIVE IC device. Assign a fixed value
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* to the controller block id value. It can nevertheless be changed
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* for testing purpose.
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*/
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#define SPAPR_XIVE_BLOCK_ID 0x0
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/*
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* sPAPR NVT and END indexing helpers
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*/
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@ -46,6 +53,64 @@ static uint32_t spapr_xive_nvt_to_target(uint8_t nvt_blk, uint32_t nvt_idx)
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return nvt_idx - SPAPR_XIVE_NVT_BASE;
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}
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static void spapr_xive_cpu_to_nvt(PowerPCCPU *cpu,
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uint8_t *out_nvt_blk, uint32_t *out_nvt_idx)
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{
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assert(cpu);
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if (out_nvt_blk) {
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*out_nvt_blk = SPAPR_XIVE_BLOCK_ID;
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}
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if (out_nvt_blk) {
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*out_nvt_idx = SPAPR_XIVE_NVT_BASE + cpu->vcpu_id;
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}
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}
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static int spapr_xive_target_to_nvt(uint32_t target,
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uint8_t *out_nvt_blk, uint32_t *out_nvt_idx)
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{
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PowerPCCPU *cpu = spapr_find_cpu(target);
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if (!cpu) {
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return -1;
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}
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spapr_xive_cpu_to_nvt(cpu, out_nvt_blk, out_nvt_idx);
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return 0;
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}
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/*
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* sPAPR END indexing uses a simple mapping of the CPU vcpu_id, 8
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* priorities per CPU
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*/
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static void spapr_xive_cpu_to_end(PowerPCCPU *cpu, uint8_t prio,
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uint8_t *out_end_blk, uint32_t *out_end_idx)
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{
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assert(cpu);
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if (out_end_blk) {
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*out_end_blk = SPAPR_XIVE_BLOCK_ID;
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}
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if (out_end_idx) {
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*out_end_idx = (cpu->vcpu_id << 3) + prio;
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}
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}
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static int spapr_xive_target_to_end(uint32_t target, uint8_t prio,
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uint8_t *out_end_blk, uint32_t *out_end_idx)
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{
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PowerPCCPU *cpu = spapr_find_cpu(target);
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if (!cpu) {
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return -1;
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}
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spapr_xive_cpu_to_end(cpu, prio, out_end_blk, out_end_idx);
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return 0;
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}
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/*
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* On sPAPR machines, use a simplified output for the XIVE END
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* structure dumping only the information related to the OS EQ.
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@ -418,3 +483,920 @@ qemu_irq spapr_xive_qirq(sPAPRXive *xive, uint32_t lisn)
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return xive_source_qirq(xsrc, lisn);
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}
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/*
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* XIVE hcalls
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*
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* The terminology used by the XIVE hcalls is the following :
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*
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* TARGET vCPU number
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* EQ Event Queue assigned by OS to receive event data
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* ESB page for source interrupt management
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* LISN Logical Interrupt Source Number identifying a source in the
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* machine
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* EISN Effective Interrupt Source Number used by guest OS to
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* identify source in the guest
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*
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* The EAS, END, NVT structures are not exposed.
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*/
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/*
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* Linux hosts under OPAL reserve priority 7 for their own escalation
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* interrupts (DD2.X POWER9). So we only allow the guest to use
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* priorities [0..6].
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*/
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static bool spapr_xive_priority_is_reserved(uint8_t priority)
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{
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switch (priority) {
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case 0 ... 6:
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return false;
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case 7: /* OPAL escalation queue */
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default:
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return true;
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}
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}
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/*
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* The H_INT_GET_SOURCE_INFO hcall() is used to obtain the logical
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* real address of the MMIO page through which the Event State Buffer
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* entry associated with the value of the "lisn" parameter is managed.
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*
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* Parameters:
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* Input
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* - R4: "flags"
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* Bits 0-63 reserved
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* - R5: "lisn" is per "interrupts", "interrupt-map", or
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* "ibm,xive-lisn-ranges" properties, or as returned by the
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* ibm,query-interrupt-source-number RTAS call, or as returned
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* by the H_ALLOCATE_VAS_WINDOW hcall
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*
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* Output
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* - R4: "flags"
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* Bits 0-59: Reserved
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* Bit 60: H_INT_ESB must be used for Event State Buffer
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* management
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* Bit 61: 1 == LSI 0 == MSI
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* Bit 62: the full function page supports trigger
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* Bit 63: Store EOI Supported
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* - R5: Logical Real address of full function Event State Buffer
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* management page, -1 if H_INT_ESB hcall flag is set to 1.
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* - R6: Logical Real Address of trigger only Event State Buffer
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* management page or -1.
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* - R7: Power of 2 page size for the ESB management pages returned in
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* R5 and R6.
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*/
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#define SPAPR_XIVE_SRC_H_INT_ESB PPC_BIT(60) /* ESB manage with H_INT_ESB */
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#define SPAPR_XIVE_SRC_LSI PPC_BIT(61) /* Virtual LSI type */
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#define SPAPR_XIVE_SRC_TRIGGER PPC_BIT(62) /* Trigger and management
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on same page */
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#define SPAPR_XIVE_SRC_STORE_EOI PPC_BIT(63) /* Store EOI support */
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static target_ulong h_int_get_source_info(PowerPCCPU *cpu,
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sPAPRMachineState *spapr,
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target_ulong opcode,
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target_ulong *args)
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{
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sPAPRXive *xive = spapr->xive;
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XiveSource *xsrc = &xive->source;
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target_ulong flags = args[0];
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target_ulong lisn = args[1];
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if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) {
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return H_FUNCTION;
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}
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if (flags) {
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return H_PARAMETER;
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}
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if (lisn >= xive->nr_irqs) {
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qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Unknown LISN " TARGET_FMT_lx "\n",
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lisn);
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return H_P2;
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}
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if (!xive_eas_is_valid(&xive->eat[lisn])) {
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qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Invalid LISN " TARGET_FMT_lx "\n",
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lisn);
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return H_P2;
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}
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/*
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* All sources are emulated under the main XIVE object and share
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* the same characteristics.
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*/
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args[0] = 0;
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if (!xive_source_esb_has_2page(xsrc)) {
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args[0] |= SPAPR_XIVE_SRC_TRIGGER;
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}
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if (xsrc->esb_flags & XIVE_SRC_STORE_EOI) {
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args[0] |= SPAPR_XIVE_SRC_STORE_EOI;
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}
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/*
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* Force the use of the H_INT_ESB hcall in case of an LSI
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* interrupt. This is necessary under KVM to re-trigger the
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* interrupt if the level is still asserted
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*/
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if (xive_source_irq_is_lsi(xsrc, lisn)) {
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args[0] |= SPAPR_XIVE_SRC_H_INT_ESB | SPAPR_XIVE_SRC_LSI;
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}
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if (!(args[0] & SPAPR_XIVE_SRC_H_INT_ESB)) {
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args[1] = xive->vc_base + xive_source_esb_mgmt(xsrc, lisn);
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} else {
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args[1] = -1;
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}
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if (xive_source_esb_has_2page(xsrc) &&
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!(args[0] & SPAPR_XIVE_SRC_H_INT_ESB)) {
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args[2] = xive->vc_base + xive_source_esb_page(xsrc, lisn);
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} else {
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args[2] = -1;
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}
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if (xive_source_esb_has_2page(xsrc)) {
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args[3] = xsrc->esb_shift - 1;
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} else {
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args[3] = xsrc->esb_shift;
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}
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return H_SUCCESS;
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}
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/*
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* The H_INT_SET_SOURCE_CONFIG hcall() is used to assign a Logical
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* Interrupt Source to a target. The Logical Interrupt Source is
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* designated with the "lisn" parameter and the target is designated
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* with the "target" and "priority" parameters. Upon return from the
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* hcall(), no additional interrupts will be directed to the old EQ.
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*
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* Parameters:
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* Input:
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* - R4: "flags"
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* Bits 0-61: Reserved
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* Bit 62: set the "eisn" in the EAS
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* Bit 63: masks the interrupt source in the hardware interrupt
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* control structure. An interrupt masked by this mechanism will
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* be dropped, but it's source state bits will still be
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* set. There is no race-free way of unmasking and restoring the
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* source. Thus this should only be used in interrupts that are
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* also masked at the source, and only in cases where the
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* interrupt is not meant to be used for a large amount of time
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* because no valid target exists for it for example
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* - R5: "lisn" is per "interrupts", "interrupt-map", or
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* "ibm,xive-lisn-ranges" properties, or as returned by the
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* ibm,query-interrupt-source-number RTAS call, or as returned by
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* the H_ALLOCATE_VAS_WINDOW hcall
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* - R6: "target" is per "ibm,ppc-interrupt-server#s" or
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* "ibm,ppc-interrupt-gserver#s"
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* - R7: "priority" is a valid priority not in
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* "ibm,plat-res-int-priorities"
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* - R8: "eisn" is the guest EISN associated with the "lisn"
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*
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* Output:
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* - None
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*/
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#define SPAPR_XIVE_SRC_SET_EISN PPC_BIT(62)
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#define SPAPR_XIVE_SRC_MASK PPC_BIT(63)
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static target_ulong h_int_set_source_config(PowerPCCPU *cpu,
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sPAPRMachineState *spapr,
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target_ulong opcode,
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target_ulong *args)
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{
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sPAPRXive *xive = spapr->xive;
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XiveEAS eas, new_eas;
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target_ulong flags = args[0];
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target_ulong lisn = args[1];
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target_ulong target = args[2];
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target_ulong priority = args[3];
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target_ulong eisn = args[4];
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uint8_t end_blk;
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uint32_t end_idx;
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if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) {
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return H_FUNCTION;
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}
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if (flags & ~(SPAPR_XIVE_SRC_SET_EISN | SPAPR_XIVE_SRC_MASK)) {
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return H_PARAMETER;
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}
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if (lisn >= xive->nr_irqs) {
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qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Unknown LISN " TARGET_FMT_lx "\n",
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lisn);
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return H_P2;
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}
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eas = xive->eat[lisn];
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if (!xive_eas_is_valid(&eas)) {
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qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Invalid LISN " TARGET_FMT_lx "\n",
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lisn);
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return H_P2;
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}
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/* priority 0xff is used to reset the EAS */
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if (priority == 0xff) {
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new_eas.w = cpu_to_be64(EAS_VALID | EAS_MASKED);
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goto out;
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}
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if (flags & SPAPR_XIVE_SRC_MASK) {
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new_eas.w = eas.w | cpu_to_be64(EAS_MASKED);
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} else {
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new_eas.w = eas.w & cpu_to_be64(~EAS_MASKED);
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}
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if (spapr_xive_priority_is_reserved(priority)) {
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qemu_log_mask(LOG_GUEST_ERROR, "XIVE: priority " TARGET_FMT_ld
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" is reserved\n", priority);
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return H_P4;
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}
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/*
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* Validate that "target" is part of the list of threads allocated
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* to the partition. For that, find the END corresponding to the
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* target.
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*/
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if (spapr_xive_target_to_end(target, priority, &end_blk, &end_idx)) {
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return H_P3;
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}
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new_eas.w = xive_set_field64(EAS_END_BLOCK, new_eas.w, end_blk);
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new_eas.w = xive_set_field64(EAS_END_INDEX, new_eas.w, end_idx);
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if (flags & SPAPR_XIVE_SRC_SET_EISN) {
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new_eas.w = xive_set_field64(EAS_END_DATA, new_eas.w, eisn);
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}
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out:
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xive->eat[lisn] = new_eas;
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return H_SUCCESS;
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}
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/*
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* The H_INT_GET_SOURCE_CONFIG hcall() is used to determine to which
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* target/priority pair is assigned to the specified Logical Interrupt
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* Source.
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*
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* Parameters:
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* Input:
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* - R4: "flags"
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* Bits 0-63 Reserved
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* - R5: "lisn" is per "interrupts", "interrupt-map", or
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* "ibm,xive-lisn-ranges" properties, or as returned by the
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* ibm,query-interrupt-source-number RTAS call, or as
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* returned by the H_ALLOCATE_VAS_WINDOW hcall
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*
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* Output:
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* - R4: Target to which the specified Logical Interrupt Source is
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* assigned
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* - R5: Priority to which the specified Logical Interrupt Source is
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* assigned
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* - R6: EISN for the specified Logical Interrupt Source (this will be
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* equivalent to the LISN if not changed by H_INT_SET_SOURCE_CONFIG)
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*/
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static target_ulong h_int_get_source_config(PowerPCCPU *cpu,
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sPAPRMachineState *spapr,
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target_ulong opcode,
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target_ulong *args)
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{
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sPAPRXive *xive = spapr->xive;
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target_ulong flags = args[0];
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target_ulong lisn = args[1];
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XiveEAS eas;
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XiveEND *end;
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uint8_t nvt_blk;
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uint32_t end_idx, nvt_idx;
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if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) {
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return H_FUNCTION;
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}
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if (flags) {
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return H_PARAMETER;
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}
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if (lisn >= xive->nr_irqs) {
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qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Unknown LISN " TARGET_FMT_lx "\n",
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lisn);
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return H_P2;
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}
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eas = xive->eat[lisn];
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if (!xive_eas_is_valid(&eas)) {
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qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Invalid LISN " TARGET_FMT_lx "\n",
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lisn);
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return H_P2;
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}
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/* EAS_END_BLOCK is unused on sPAPR */
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end_idx = xive_get_field64(EAS_END_INDEX, eas.w);
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assert(end_idx < xive->nr_ends);
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end = &xive->endt[end_idx];
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nvt_blk = xive_get_field32(END_W6_NVT_BLOCK, end->w6);
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nvt_idx = xive_get_field32(END_W6_NVT_INDEX, end->w6);
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args[0] = spapr_xive_nvt_to_target(nvt_blk, nvt_idx);
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if (xive_eas_is_masked(&eas)) {
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args[1] = 0xff;
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} else {
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args[1] = xive_get_field32(END_W7_F0_PRIORITY, end->w7);
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}
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args[2] = xive_get_field64(EAS_END_DATA, eas.w);
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return H_SUCCESS;
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}
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/*
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* The H_INT_GET_QUEUE_INFO hcall() is used to get the logical real
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* address of the notification management page associated with the
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* specified target and priority.
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*
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* Parameters:
|
||||
* Input:
|
||||
* - R4: "flags"
|
||||
* Bits 0-63 Reserved
|
||||
* - R5: "target" is per "ibm,ppc-interrupt-server#s" or
|
||||
* "ibm,ppc-interrupt-gserver#s"
|
||||
* - R6: "priority" is a valid priority not in
|
||||
* "ibm,plat-res-int-priorities"
|
||||
*
|
||||
* Output:
|
||||
* - R4: Logical real address of notification page
|
||||
* - R5: Power of 2 page size of the notification page
|
||||
*/
|
||||
static target_ulong h_int_get_queue_info(PowerPCCPU *cpu,
|
||||
sPAPRMachineState *spapr,
|
||||
target_ulong opcode,
|
||||
target_ulong *args)
|
||||
{
|
||||
sPAPRXive *xive = spapr->xive;
|
||||
XiveENDSource *end_xsrc = &xive->end_source;
|
||||
target_ulong flags = args[0];
|
||||
target_ulong target = args[1];
|
||||
target_ulong priority = args[2];
|
||||
XiveEND *end;
|
||||
uint8_t end_blk;
|
||||
uint32_t end_idx;
|
||||
|
||||
if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) {
|
||||
return H_FUNCTION;
|
||||
}
|
||||
|
||||
if (flags) {
|
||||
return H_PARAMETER;
|
||||
}
|
||||
|
||||
/*
|
||||
* H_STATE should be returned if a H_INT_RESET is in progress.
|
||||
* This is not needed when running the emulation under QEMU
|
||||
*/
|
||||
|
||||
if (spapr_xive_priority_is_reserved(priority)) {
|
||||
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: priority " TARGET_FMT_ld
|
||||
" is reserved\n", priority);
|
||||
return H_P3;
|
||||
}
|
||||
|
||||
/*
|
||||
* Validate that "target" is part of the list of threads allocated
|
||||
* to the partition. For that, find the END corresponding to the
|
||||
* target.
|
||||
*/
|
||||
if (spapr_xive_target_to_end(target, priority, &end_blk, &end_idx)) {
|
||||
return H_P2;
|
||||
}
|
||||
|
||||
assert(end_idx < xive->nr_ends);
|
||||
end = &xive->endt[end_idx];
|
||||
|
||||
args[0] = xive->end_base + (1ull << (end_xsrc->esb_shift + 1)) * end_idx;
|
||||
if (xive_end_is_enqueue(end)) {
|
||||
args[1] = xive_get_field32(END_W0_QSIZE, end->w0) + 12;
|
||||
} else {
|
||||
args[1] = 0;
|
||||
}
|
||||
|
||||
return H_SUCCESS;
|
||||
}
|
||||
|
||||
/*
|
||||
* The H_INT_SET_QUEUE_CONFIG hcall() is used to set or reset a EQ for
|
||||
* a given "target" and "priority". It is also used to set the
|
||||
* notification config associated with the EQ. An EQ size of 0 is
|
||||
* used to reset the EQ config for a given target and priority. If
|
||||
* resetting the EQ config, the END associated with the given "target"
|
||||
* and "priority" will be changed to disable queueing.
|
||||
*
|
||||
* Upon return from the hcall(), no additional interrupts will be
|
||||
* directed to the old EQ (if one was set). The old EQ (if one was
|
||||
* set) should be investigated for interrupts that occurred prior to
|
||||
* or during the hcall().
|
||||
*
|
||||
* Parameters:
|
||||
* Input:
|
||||
* - R4: "flags"
|
||||
* Bits 0-62: Reserved
|
||||
* Bit 63: Unconditional Notify (n) per the XIVE spec
|
||||
* - R5: "target" is per "ibm,ppc-interrupt-server#s" or
|
||||
* "ibm,ppc-interrupt-gserver#s"
|
||||
* - R6: "priority" is a valid priority not in
|
||||
* "ibm,plat-res-int-priorities"
|
||||
* - R7: "eventQueue": The logical real address of the start of the EQ
|
||||
* - R8: "eventQueueSize": The power of 2 EQ size per "ibm,xive-eq-sizes"
|
||||
*
|
||||
* Output:
|
||||
* - None
|
||||
*/
|
||||
|
||||
#define SPAPR_XIVE_END_ALWAYS_NOTIFY PPC_BIT(63)
|
||||
|
||||
static target_ulong h_int_set_queue_config(PowerPCCPU *cpu,
|
||||
sPAPRMachineState *spapr,
|
||||
target_ulong opcode,
|
||||
target_ulong *args)
|
||||
{
|
||||
sPAPRXive *xive = spapr->xive;
|
||||
target_ulong flags = args[0];
|
||||
target_ulong target = args[1];
|
||||
target_ulong priority = args[2];
|
||||
target_ulong qpage = args[3];
|
||||
target_ulong qsize = args[4];
|
||||
XiveEND end;
|
||||
uint8_t end_blk, nvt_blk;
|
||||
uint32_t end_idx, nvt_idx;
|
||||
|
||||
if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) {
|
||||
return H_FUNCTION;
|
||||
}
|
||||
|
||||
if (flags & ~SPAPR_XIVE_END_ALWAYS_NOTIFY) {
|
||||
return H_PARAMETER;
|
||||
}
|
||||
|
||||
/*
|
||||
* H_STATE should be returned if a H_INT_RESET is in progress.
|
||||
* This is not needed when running the emulation under QEMU
|
||||
*/
|
||||
|
||||
if (spapr_xive_priority_is_reserved(priority)) {
|
||||
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: priority " TARGET_FMT_ld
|
||||
" is reserved\n", priority);
|
||||
return H_P3;
|
||||
}
|
||||
|
||||
/*
|
||||
* Validate that "target" is part of the list of threads allocated
|
||||
* to the partition. For that, find the END corresponding to the
|
||||
* target.
|
||||
*/
|
||||
|
||||
if (spapr_xive_target_to_end(target, priority, &end_blk, &end_idx)) {
|
||||
return H_P2;
|
||||
}
|
||||
|
||||
assert(end_idx < xive->nr_ends);
|
||||
memcpy(&end, &xive->endt[end_idx], sizeof(XiveEND));
|
||||
|
||||
switch (qsize) {
|
||||
case 12:
|
||||
case 16:
|
||||
case 21:
|
||||
case 24:
|
||||
end.w2 = cpu_to_be32((qpage >> 32) & 0x0fffffff);
|
||||
end.w3 = cpu_to_be32(qpage & 0xffffffff);
|
||||
end.w0 |= cpu_to_be32(END_W0_ENQUEUE);
|
||||
end.w0 = xive_set_field32(END_W0_QSIZE, end.w0, qsize - 12);
|
||||
break;
|
||||
case 0:
|
||||
/* reset queue and disable queueing */
|
||||
spapr_xive_end_reset(&end);
|
||||
goto out;
|
||||
|
||||
default:
|
||||
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: invalid EQ size %"PRIx64"\n",
|
||||
qsize);
|
||||
return H_P5;
|
||||
}
|
||||
|
||||
if (qsize) {
|
||||
hwaddr plen = 1 << qsize;
|
||||
void *eq;
|
||||
|
||||
/*
|
||||
* Validate the guest EQ. We should also check that the queue
|
||||
* has been zeroed by the OS.
|
||||
*/
|
||||
eq = address_space_map(CPU(cpu)->as, qpage, &plen, true,
|
||||
MEMTXATTRS_UNSPECIFIED);
|
||||
if (plen != 1 << qsize) {
|
||||
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: failed to map EQ @0x%"
|
||||
HWADDR_PRIx "\n", qpage);
|
||||
return H_P4;
|
||||
}
|
||||
address_space_unmap(CPU(cpu)->as, eq, plen, true, plen);
|
||||
}
|
||||
|
||||
/* "target" should have been validated above */
|
||||
if (spapr_xive_target_to_nvt(target, &nvt_blk, &nvt_idx)) {
|
||||
g_assert_not_reached();
|
||||
}
|
||||
|
||||
/*
|
||||
* Ensure the priority and target are correctly set (they will not
|
||||
* be right after allocation)
|
||||
*/
|
||||
end.w6 = xive_set_field32(END_W6_NVT_BLOCK, 0ul, nvt_blk) |
|
||||
xive_set_field32(END_W6_NVT_INDEX, 0ul, nvt_idx);
|
||||
end.w7 = xive_set_field32(END_W7_F0_PRIORITY, 0ul, priority);
|
||||
|
||||
if (flags & SPAPR_XIVE_END_ALWAYS_NOTIFY) {
|
||||
end.w0 |= cpu_to_be32(END_W0_UCOND_NOTIFY);
|
||||
} else {
|
||||
end.w0 &= cpu_to_be32((uint32_t)~END_W0_UCOND_NOTIFY);
|
||||
}
|
||||
|
||||
/*
|
||||
* The generation bit for the END starts at 1 and The END page
|
||||
* offset counter starts at 0.
|
||||
*/
|
||||
end.w1 = cpu_to_be32(END_W1_GENERATION) |
|
||||
xive_set_field32(END_W1_PAGE_OFF, 0ul, 0ul);
|
||||
end.w0 |= cpu_to_be32(END_W0_VALID);
|
||||
|
||||
/*
|
||||
* TODO: issue syncs required to ensure all in-flight interrupts
|
||||
* are complete on the old END
|
||||
*/
|
||||
|
||||
out:
|
||||
/* Update END */
|
||||
memcpy(&xive->endt[end_idx], &end, sizeof(XiveEND));
|
||||
return H_SUCCESS;
|
||||
}
|
||||
|
||||
/*
|
||||
* The H_INT_GET_QUEUE_CONFIG hcall() is used to get a EQ for a given
|
||||
* target and priority.
|
||||
*
|
||||
* Parameters:
|
||||
* Input:
|
||||
* - R4: "flags"
|
||||
* Bits 0-62: Reserved
|
||||
* Bit 63: Debug: Return debug data
|
||||
* - R5: "target" is per "ibm,ppc-interrupt-server#s" or
|
||||
* "ibm,ppc-interrupt-gserver#s"
|
||||
* - R6: "priority" is a valid priority not in
|
||||
* "ibm,plat-res-int-priorities"
|
||||
*
|
||||
* Output:
|
||||
* - R4: "flags":
|
||||
* Bits 0-61: Reserved
|
||||
* Bit 62: The value of Event Queue Generation Number (g) per
|
||||
* the XIVE spec if "Debug" = 1
|
||||
* Bit 63: The value of Unconditional Notify (n) per the XIVE spec
|
||||
* - R5: The logical real address of the start of the EQ
|
||||
* - R6: The power of 2 EQ size per "ibm,xive-eq-sizes"
|
||||
* - R7: The value of Event Queue Offset Counter per XIVE spec
|
||||
* if "Debug" = 1, else 0
|
||||
*
|
||||
*/
|
||||
|
||||
#define SPAPR_XIVE_END_DEBUG PPC_BIT(63)
|
||||
|
||||
static target_ulong h_int_get_queue_config(PowerPCCPU *cpu,
|
||||
sPAPRMachineState *spapr,
|
||||
target_ulong opcode,
|
||||
target_ulong *args)
|
||||
{
|
||||
sPAPRXive *xive = spapr->xive;
|
||||
target_ulong flags = args[0];
|
||||
target_ulong target = args[1];
|
||||
target_ulong priority = args[2];
|
||||
XiveEND *end;
|
||||
uint8_t end_blk;
|
||||
uint32_t end_idx;
|
||||
|
||||
if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) {
|
||||
return H_FUNCTION;
|
||||
}
|
||||
|
||||
if (flags & ~SPAPR_XIVE_END_DEBUG) {
|
||||
return H_PARAMETER;
|
||||
}
|
||||
|
||||
/*
|
||||
* H_STATE should be returned if a H_INT_RESET is in progress.
|
||||
* This is not needed when running the emulation under QEMU
|
||||
*/
|
||||
|
||||
if (spapr_xive_priority_is_reserved(priority)) {
|
||||
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: priority " TARGET_FMT_ld
|
||||
" is reserved\n", priority);
|
||||
return H_P3;
|
||||
}
|
||||
|
||||
/*
|
||||
* Validate that "target" is part of the list of threads allocated
|
||||
* to the partition. For that, find the END corresponding to the
|
||||
* target.
|
||||
*/
|
||||
if (spapr_xive_target_to_end(target, priority, &end_blk, &end_idx)) {
|
||||
return H_P2;
|
||||
}
|
||||
|
||||
assert(end_idx < xive->nr_ends);
|
||||
end = &xive->endt[end_idx];
|
||||
|
||||
args[0] = 0;
|
||||
if (xive_end_is_notify(end)) {
|
||||
args[0] |= SPAPR_XIVE_END_ALWAYS_NOTIFY;
|
||||
}
|
||||
|
||||
if (xive_end_is_enqueue(end)) {
|
||||
args[1] = (uint64_t) be32_to_cpu(end->w2 & 0x0fffffff) << 32
|
||||
| be32_to_cpu(end->w3);
|
||||
args[2] = xive_get_field32(END_W0_QSIZE, end->w0) + 12;
|
||||
} else {
|
||||
args[1] = 0;
|
||||
args[2] = 0;
|
||||
}
|
||||
|
||||
/* TODO: do we need any locking on the END ? */
|
||||
if (flags & SPAPR_XIVE_END_DEBUG) {
|
||||
/* Load the event queue generation number into the return flags */
|
||||
args[0] |= (uint64_t)xive_get_field32(END_W1_GENERATION, end->w1) << 62;
|
||||
|
||||
/* Load R7 with the event queue offset counter */
|
||||
args[3] = xive_get_field32(END_W1_PAGE_OFF, end->w1);
|
||||
} else {
|
||||
args[3] = 0;
|
||||
}
|
||||
|
||||
return H_SUCCESS;
|
||||
}
|
||||
|
||||
/*
|
||||
* The H_INT_SET_OS_REPORTING_LINE hcall() is used to set the
|
||||
* reporting cache line pair for the calling thread. The reporting
|
||||
* cache lines will contain the OS interrupt context when the OS
|
||||
* issues a CI store byte to @TIMA+0xC10 to acknowledge the OS
|
||||
* interrupt. The reporting cache lines can be reset by inputting -1
|
||||
* in "reportingLine". Issuing the CI store byte without reporting
|
||||
* cache lines registered will result in the data not being accessible
|
||||
* to the OS.
|
||||
*
|
||||
* Parameters:
|
||||
* Input:
|
||||
* - R4: "flags"
|
||||
* Bits 0-63: Reserved
|
||||
* - R5: "reportingLine": The logical real address of the reporting cache
|
||||
* line pair
|
||||
*
|
||||
* Output:
|
||||
* - None
|
||||
*/
|
||||
static target_ulong h_int_set_os_reporting_line(PowerPCCPU *cpu,
|
||||
sPAPRMachineState *spapr,
|
||||
target_ulong opcode,
|
||||
target_ulong *args)
|
||||
{
|
||||
if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) {
|
||||
return H_FUNCTION;
|
||||
}
|
||||
|
||||
/*
|
||||
* H_STATE should be returned if a H_INT_RESET is in progress.
|
||||
* This is not needed when running the emulation under QEMU
|
||||
*/
|
||||
|
||||
/* TODO: H_INT_SET_OS_REPORTING_LINE */
|
||||
return H_FUNCTION;
|
||||
}
|
||||
|
||||
/*
|
||||
* The H_INT_GET_OS_REPORTING_LINE hcall() is used to get the logical
|
||||
* real address of the reporting cache line pair set for the input
|
||||
* "target". If no reporting cache line pair has been set, -1 is
|
||||
* returned.
|
||||
*
|
||||
* Parameters:
|
||||
* Input:
|
||||
* - R4: "flags"
|
||||
* Bits 0-63: Reserved
|
||||
* - R5: "target" is per "ibm,ppc-interrupt-server#s" or
|
||||
* "ibm,ppc-interrupt-gserver#s"
|
||||
* - R6: "reportingLine": The logical real address of the reporting
|
||||
* cache line pair
|
||||
*
|
||||
* Output:
|
||||
* - R4: The logical real address of the reporting line if set, else -1
|
||||
*/
|
||||
static target_ulong h_int_get_os_reporting_line(PowerPCCPU *cpu,
|
||||
sPAPRMachineState *spapr,
|
||||
target_ulong opcode,
|
||||
target_ulong *args)
|
||||
{
|
||||
if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) {
|
||||
return H_FUNCTION;
|
||||
}
|
||||
|
||||
/*
|
||||
* H_STATE should be returned if a H_INT_RESET is in progress.
|
||||
* This is not needed when running the emulation under QEMU
|
||||
*/
|
||||
|
||||
/* TODO: H_INT_GET_OS_REPORTING_LINE */
|
||||
return H_FUNCTION;
|
||||
}
|
||||
|
||||
/*
|
||||
* The H_INT_ESB hcall() is used to issue a load or store to the ESB
|
||||
* page for the input "lisn". This hcall is only supported for LISNs
|
||||
* that have the ESB hcall flag set to 1 when returned from hcall()
|
||||
* H_INT_GET_SOURCE_INFO.
|
||||
*
|
||||
* Parameters:
|
||||
* Input:
|
||||
* - R4: "flags"
|
||||
* Bits 0-62: Reserved
|
||||
* bit 63: Store: Store=1, store operation, else load operation
|
||||
* - R5: "lisn" is per "interrupts", "interrupt-map", or
|
||||
* "ibm,xive-lisn-ranges" properties, or as returned by the
|
||||
* ibm,query-interrupt-source-number RTAS call, or as
|
||||
* returned by the H_ALLOCATE_VAS_WINDOW hcall
|
||||
* - R6: "esbOffset" is the offset into the ESB page for the load or
|
||||
* store operation
|
||||
* - R7: "storeData" is the data to write for a store operation
|
||||
*
|
||||
* Output:
|
||||
* - R4: The value of the load if load operation, else -1
|
||||
*/
|
||||
|
||||
#define SPAPR_XIVE_ESB_STORE PPC_BIT(63)
|
||||
|
||||
static target_ulong h_int_esb(PowerPCCPU *cpu,
|
||||
sPAPRMachineState *spapr,
|
||||
target_ulong opcode,
|
||||
target_ulong *args)
|
||||
{
|
||||
sPAPRXive *xive = spapr->xive;
|
||||
XiveEAS eas;
|
||||
target_ulong flags = args[0];
|
||||
target_ulong lisn = args[1];
|
||||
target_ulong offset = args[2];
|
||||
target_ulong data = args[3];
|
||||
hwaddr mmio_addr;
|
||||
XiveSource *xsrc = &xive->source;
|
||||
|
||||
if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) {
|
||||
return H_FUNCTION;
|
||||
}
|
||||
|
||||
if (flags & ~SPAPR_XIVE_ESB_STORE) {
|
||||
return H_PARAMETER;
|
||||
}
|
||||
|
||||
if (lisn >= xive->nr_irqs) {
|
||||
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Unknown LISN " TARGET_FMT_lx "\n",
|
||||
lisn);
|
||||
return H_P2;
|
||||
}
|
||||
|
||||
eas = xive->eat[lisn];
|
||||
if (!xive_eas_is_valid(&eas)) {
|
||||
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Invalid LISN " TARGET_FMT_lx "\n",
|
||||
lisn);
|
||||
return H_P2;
|
||||
}
|
||||
|
||||
if (offset > (1ull << xsrc->esb_shift)) {
|
||||
return H_P3;
|
||||
}
|
||||
|
||||
mmio_addr = xive->vc_base + xive_source_esb_mgmt(xsrc, lisn) + offset;
|
||||
|
||||
if (dma_memory_rw(&address_space_memory, mmio_addr, &data, 8,
|
||||
(flags & SPAPR_XIVE_ESB_STORE))) {
|
||||
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: failed to access ESB @0x%"
|
||||
HWADDR_PRIx "\n", mmio_addr);
|
||||
return H_HARDWARE;
|
||||
}
|
||||
args[0] = (flags & SPAPR_XIVE_ESB_STORE) ? -1 : data;
|
||||
return H_SUCCESS;
|
||||
}
|
||||
|
||||
/*
|
||||
* The H_INT_SYNC hcall() is used to issue hardware syncs that will
|
||||
* ensure any in flight events for the input lisn are in the event
|
||||
* queue.
|
||||
*
|
||||
* Parameters:
|
||||
* Input:
|
||||
* - R4: "flags"
|
||||
* Bits 0-63: Reserved
|
||||
* - R5: "lisn" is per "interrupts", "interrupt-map", or
|
||||
* "ibm,xive-lisn-ranges" properties, or as returned by the
|
||||
* ibm,query-interrupt-source-number RTAS call, or as
|
||||
* returned by the H_ALLOCATE_VAS_WINDOW hcall
|
||||
*
|
||||
* Output:
|
||||
* - None
|
||||
*/
|
||||
static target_ulong h_int_sync(PowerPCCPU *cpu,
|
||||
sPAPRMachineState *spapr,
|
||||
target_ulong opcode,
|
||||
target_ulong *args)
|
||||
{
|
||||
sPAPRXive *xive = spapr->xive;
|
||||
XiveEAS eas;
|
||||
target_ulong flags = args[0];
|
||||
target_ulong lisn = args[1];
|
||||
|
||||
if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) {
|
||||
return H_FUNCTION;
|
||||
}
|
||||
|
||||
if (flags) {
|
||||
return H_PARAMETER;
|
||||
}
|
||||
|
||||
if (lisn >= xive->nr_irqs) {
|
||||
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Unknown LISN " TARGET_FMT_lx "\n",
|
||||
lisn);
|
||||
return H_P2;
|
||||
}
|
||||
|
||||
eas = xive->eat[lisn];
|
||||
if (!xive_eas_is_valid(&eas)) {
|
||||
qemu_log_mask(LOG_GUEST_ERROR, "XIVE: Invalid LISN " TARGET_FMT_lx "\n",
|
||||
lisn);
|
||||
return H_P2;
|
||||
}
|
||||
|
||||
/*
|
||||
* H_STATE should be returned if a H_INT_RESET is in progress.
|
||||
* This is not needed when running the emulation under QEMU
|
||||
*/
|
||||
|
||||
/* This is not real hardware. Nothing to be done */
|
||||
return H_SUCCESS;
|
||||
}
|
||||
|
||||
/*
|
||||
* The H_INT_RESET hcall() is used to reset all of the partition's
|
||||
* interrupt exploitation structures to their initial state. This
|
||||
* means losing all previously set interrupt state set via
|
||||
* H_INT_SET_SOURCE_CONFIG and H_INT_SET_QUEUE_CONFIG.
|
||||
*
|
||||
* Parameters:
|
||||
* Input:
|
||||
* - R4: "flags"
|
||||
* Bits 0-63: Reserved
|
||||
*
|
||||
* Output:
|
||||
* - None
|
||||
*/
|
||||
static target_ulong h_int_reset(PowerPCCPU *cpu,
|
||||
sPAPRMachineState *spapr,
|
||||
target_ulong opcode,
|
||||
target_ulong *args)
|
||||
{
|
||||
sPAPRXive *xive = spapr->xive;
|
||||
target_ulong flags = args[0];
|
||||
|
||||
if (!spapr_ovec_test(spapr->ov5_cas, OV5_XIVE_EXPLOIT)) {
|
||||
return H_FUNCTION;
|
||||
}
|
||||
|
||||
if (flags) {
|
||||
return H_PARAMETER;
|
||||
}
|
||||
|
||||
device_reset(DEVICE(xive));
|
||||
return H_SUCCESS;
|
||||
}
|
||||
|
||||
void spapr_xive_hcall_init(sPAPRMachineState *spapr)
|
||||
{
|
||||
spapr_register_hypercall(H_INT_GET_SOURCE_INFO, h_int_get_source_info);
|
||||
spapr_register_hypercall(H_INT_SET_SOURCE_CONFIG, h_int_set_source_config);
|
||||
spapr_register_hypercall(H_INT_GET_SOURCE_CONFIG, h_int_get_source_config);
|
||||
spapr_register_hypercall(H_INT_GET_QUEUE_INFO, h_int_get_queue_info);
|
||||
spapr_register_hypercall(H_INT_SET_QUEUE_CONFIG, h_int_set_queue_config);
|
||||
spapr_register_hypercall(H_INT_GET_QUEUE_CONFIG, h_int_get_queue_config);
|
||||
spapr_register_hypercall(H_INT_SET_OS_REPORTING_LINE,
|
||||
h_int_set_os_reporting_line);
|
||||
spapr_register_hypercall(H_INT_GET_OS_REPORTING_LINE,
|
||||
h_int_get_os_reporting_line);
|
||||
spapr_register_hypercall(H_INT_ESB, h_int_esb);
|
||||
spapr_register_hypercall(H_INT_SYNC, h_int_sync);
|
||||
spapr_register_hypercall(H_INT_RESET, h_int_reset);
|
||||
}
|
||||
|
||||
@ -239,6 +239,8 @@ static void spapr_irq_init_xive(sPAPRMachineState *spapr, Error **errp)
|
||||
for (i = 0; i < nr_servers; ++i) {
|
||||
spapr_xive_irq_claim(spapr->xive, SPAPR_IRQ_IPI + i, false);
|
||||
}
|
||||
|
||||
spapr_xive_hcall_init(spapr);
|
||||
}
|
||||
|
||||
static int spapr_irq_claim_xive(sPAPRMachineState *spapr, int irq, bool lsi,
|
||||
|
||||
@ -452,7 +452,20 @@ struct sPAPRMachineState {
|
||||
#define H_INVALIDATE_PID 0x378
|
||||
#define H_REGISTER_PROC_TBL 0x37C
|
||||
#define H_SIGNAL_SYS_RESET 0x380
|
||||
#define MAX_HCALL_OPCODE H_SIGNAL_SYS_RESET
|
||||
|
||||
#define H_INT_GET_SOURCE_INFO 0x3A8
|
||||
#define H_INT_SET_SOURCE_CONFIG 0x3AC
|
||||
#define H_INT_GET_SOURCE_CONFIG 0x3B0
|
||||
#define H_INT_GET_QUEUE_INFO 0x3B4
|
||||
#define H_INT_SET_QUEUE_CONFIG 0x3B8
|
||||
#define H_INT_GET_QUEUE_CONFIG 0x3BC
|
||||
#define H_INT_SET_OS_REPORTING_LINE 0x3C0
|
||||
#define H_INT_GET_OS_REPORTING_LINE 0x3C4
|
||||
#define H_INT_ESB 0x3C8
|
||||
#define H_INT_SYNC 0x3CC
|
||||
#define H_INT_RESET 0x3D0
|
||||
|
||||
#define MAX_HCALL_OPCODE H_INT_RESET
|
||||
|
||||
/* The hcalls above are standardized in PAPR and implemented by pHyp
|
||||
* as well.
|
||||
|
||||
@ -42,4 +42,8 @@ bool spapr_xive_irq_free(sPAPRXive *xive, uint32_t lisn);
|
||||
void spapr_xive_pic_print_info(sPAPRXive *xive, Monitor *mon);
|
||||
qemu_irq spapr_xive_qirq(sPAPRXive *xive, uint32_t lisn);
|
||||
|
||||
typedef struct sPAPRMachineState sPAPRMachineState;
|
||||
|
||||
void spapr_xive_hcall_init(sPAPRMachineState *spapr);
|
||||
|
||||
#endif /* PPC_SPAPR_XIVE_H */
|
||||
|
||||
Loading…
Reference in New Issue
Block a user