To Save and Restore ICC_SRE_EL1 register introduce vmstate subsection and load only if non-zero. Also initialize icc_sre_el1 with to 0x7 in pre_load function. Signed-off-by: Vijaya Kumar K <Vijaya.Kumar@cavium.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Eric Auger <eric.auger@redhat.com> Message-id: 1487850673-26455-3-git-send-email-vijay.kilari@gmail.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
297 lines
10 KiB
C
297 lines
10 KiB
C
/*
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* ARM GIC support
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*
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* Copyright (c) 2012 Linaro Limited
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* Copyright (c) 2015 Huawei.
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* Copyright (c) 2015 Samsung Electronics Co., Ltd.
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* Written by Peter Maydell
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* Reworked for GICv3 by Shlomo Pongratz and Pavel Fedin
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef HW_ARM_GICV3_COMMON_H
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#define HW_ARM_GICV3_COMMON_H
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#include "hw/sysbus.h"
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#include "hw/intc/arm_gic_common.h"
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/*
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* Maximum number of possible interrupts, determined by the GIC architecture.
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* Note that this does not include LPIs. When implemented, these should be
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* dealt with separately.
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*/
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#define GICV3_MAXIRQ 1020
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#define GICV3_MAXSPI (GICV3_MAXIRQ - GIC_INTERNAL)
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/* Number of SGI target-list bits */
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#define GICV3_TARGETLIST_BITS 16
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/* Maximum number of list registers (architectural limit) */
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#define GICV3_LR_MAX 16
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/* Minimum BPR for Secure, or when security not enabled */
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#define GIC_MIN_BPR 0
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/* Minimum BPR for Nonsecure when security is enabled */
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#define GIC_MIN_BPR_NS (GIC_MIN_BPR + 1)
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/* For some distributor fields we want to model the array of 32-bit
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* register values which hold various bitmaps corresponding to enabled,
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* pending, etc bits. These macros and functions facilitate that; the
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* APIs are generally modelled on the generic bitmap.h functions
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* (which are unsuitable here because they use 'unsigned long' as the
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* underlying storage type, which is very awkward when you need to
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* access the data as 32-bit values.)
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* Each bitmap contains a bit for each interrupt. Although there is
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* space for the PPIs and SGIs, those bits (the first 32) are never
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* used as that state lives in the redistributor. The unused bits are
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* provided purely so that interrupt X's state is always in bit X; this
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* avoids bugs where we forget to subtract GIC_INTERNAL from an
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* interrupt number.
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*/
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#define GICV3_BMP_SIZE (DIV_ROUND_UP(GICV3_MAXIRQ, 32))
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#define GIC_DECLARE_BITMAP(name) \
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uint32_t name[GICV3_BMP_SIZE]
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#define GIC_BIT_MASK(nr) (1U << ((nr) % 32))
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#define GIC_BIT_WORD(nr) ((nr) / 32)
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static inline void gic_bmp_set_bit(int nr, uint32_t *addr)
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{
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uint32_t mask = GIC_BIT_MASK(nr);
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uint32_t *p = addr + GIC_BIT_WORD(nr);
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*p |= mask;
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}
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static inline void gic_bmp_clear_bit(int nr, uint32_t *addr)
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{
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uint32_t mask = GIC_BIT_MASK(nr);
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uint32_t *p = addr + GIC_BIT_WORD(nr);
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*p &= ~mask;
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}
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static inline int gic_bmp_test_bit(int nr, const uint32_t *addr)
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{
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return 1U & (addr[GIC_BIT_WORD(nr)] >> (nr & 31));
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}
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static inline void gic_bmp_replace_bit(int nr, uint32_t *addr, int val)
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{
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uint32_t mask = GIC_BIT_MASK(nr);
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uint32_t *p = addr + GIC_BIT_WORD(nr);
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*p &= ~mask;
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*p |= (val & 1U) << (nr % 32);
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}
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/* Return a pointer to the 32-bit word containing the specified bit. */
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static inline uint32_t *gic_bmp_ptr32(uint32_t *addr, int nr)
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{
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return addr + GIC_BIT_WORD(nr);
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}
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typedef struct GICv3State GICv3State;
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typedef struct GICv3CPUState GICv3CPUState;
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/* Some CPU interface registers come in three flavours:
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* Group0, Group1 (Secure) and Group1 (NonSecure)
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* (where the latter two are exposed as a single banked system register).
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* In the state struct they are implemented as a 3-element array which
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* can be indexed into by the GICV3_G0, GICV3_G1 and GICV3_G1NS constants.
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* If the CPU doesn't support EL3 then the G1 element is unused.
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*
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* These constants are also used to communicate the group to use for
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* an interrupt or SGI when it is passed between the cpu interface and
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* the redistributor or distributor. For those purposes the receiving end
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* must be prepared to cope with a Group 1 Secure interrupt even if it does
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* not have security support enabled, because security can be disabled
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* independently in the CPU and in the GIC. In that case the receiver should
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* treat an incoming Group 1 Secure interrupt as if it were Group 0.
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* (This architectural requirement is why the _G1 element is the unused one
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* in a no-EL3 CPU: we would otherwise have to translate back and forth
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* between (G0, G1NS) from the distributor and (G0, G1) in the CPU i/f.)
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*/
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#define GICV3_G0 0
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#define GICV3_G1 1
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#define GICV3_G1NS 2
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/* ICC_CTLR_EL1, GICD_STATUSR and GICR_STATUSR are banked but not
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* group-related, so those indices are just 0 for S and 1 for NS.
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* (If the CPU or the GIC, respectively, don't support the Security
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* extensions then the S element is unused.)
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*/
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#define GICV3_S 0
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#define GICV3_NS 1
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typedef struct {
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int irq;
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uint8_t prio;
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int grp;
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} PendingIrq;
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struct GICv3CPUState {
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GICv3State *gic;
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CPUState *cpu;
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qemu_irq parent_irq;
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qemu_irq parent_fiq;
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qemu_irq parent_virq;
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qemu_irq parent_vfiq;
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qemu_irq maintenance_irq;
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/* Redistributor */
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uint32_t level; /* Current IRQ level */
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/* RD_base page registers */
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uint32_t gicr_ctlr;
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uint64_t gicr_typer;
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uint32_t gicr_statusr[2];
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uint32_t gicr_waker;
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uint64_t gicr_propbaser;
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uint64_t gicr_pendbaser;
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/* SGI_base page registers */
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uint32_t gicr_igroupr0;
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uint32_t gicr_ienabler0;
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uint32_t gicr_ipendr0;
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uint32_t gicr_iactiver0;
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uint32_t edge_trigger; /* ICFGR0 and ICFGR1 even bits */
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uint32_t gicr_igrpmodr0;
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uint32_t gicr_nsacr;
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uint8_t gicr_ipriorityr[GIC_INTERNAL];
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/* CPU interface */
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uint64_t icc_sre_el1;
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uint64_t icc_ctlr_el1[2];
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uint64_t icc_pmr_el1;
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uint64_t icc_bpr[3];
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uint64_t icc_apr[3][4];
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uint64_t icc_igrpen[3];
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uint64_t icc_ctlr_el3;
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/* Virtualization control interface */
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uint64_t ich_apr[3][4]; /* ich_apr[GICV3_G1][x] never used */
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uint64_t ich_hcr_el2;
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uint64_t ich_lr_el2[GICV3_LR_MAX];
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uint64_t ich_vmcr_el2;
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/* Properties of the CPU interface. These are initialized from
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* the settings in the CPU proper.
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* If the number of implemented list registers is 0 then the
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* virtualization support is not implemented.
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*/
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int num_list_regs;
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int vpribits; /* number of virtual priority bits */
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int vprebits; /* number of virtual preemption bits */
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/* Current highest priority pending interrupt for this CPU.
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* This is cached information that can be recalculated from the
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* real state above; it doesn't need to be migrated.
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*/
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PendingIrq hppi;
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/* This is temporary working state, to avoid a malloc in gicv3_update() */
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bool seenbetter;
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};
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struct GICv3State {
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/*< private >*/
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SysBusDevice parent_obj;
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/*< public >*/
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MemoryRegion iomem_dist; /* Distributor */
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MemoryRegion iomem_redist; /* Redistributors */
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uint32_t num_cpu;
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uint32_t num_irq;
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uint32_t revision;
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bool security_extn;
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bool irq_reset_nonsecure;
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int dev_fd; /* kvm device fd if backed by kvm vgic support */
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Error *migration_blocker;
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/* Distributor */
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/* for a GIC with the security extensions the NS banked version of this
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* register is just an alias of bit 1 of the S banked version.
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*/
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uint32_t gicd_ctlr;
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uint32_t gicd_statusr[2];
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GIC_DECLARE_BITMAP(group); /* GICD_IGROUPR */
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GIC_DECLARE_BITMAP(grpmod); /* GICD_IGRPMODR */
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GIC_DECLARE_BITMAP(enabled); /* GICD_ISENABLER */
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GIC_DECLARE_BITMAP(pending); /* GICD_ISPENDR */
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GIC_DECLARE_BITMAP(active); /* GICD_ISACTIVER */
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GIC_DECLARE_BITMAP(level); /* Current level */
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GIC_DECLARE_BITMAP(edge_trigger); /* GICD_ICFGR even bits */
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uint8_t gicd_ipriority[GICV3_MAXIRQ];
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uint64_t gicd_irouter[GICV3_MAXIRQ];
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/* Cached information: pointer to the cpu i/f for the CPUs specified
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* in the IROUTER registers
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*/
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GICv3CPUState *gicd_irouter_target[GICV3_MAXIRQ];
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uint32_t gicd_nsacr[DIV_ROUND_UP(GICV3_MAXIRQ, 16)];
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GICv3CPUState *cpu;
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};
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#define GICV3_BITMAP_ACCESSORS(BMP) \
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static inline void gicv3_gicd_##BMP##_set(GICv3State *s, int irq) \
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{ \
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gic_bmp_set_bit(irq, s->BMP); \
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} \
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static inline int gicv3_gicd_##BMP##_test(GICv3State *s, int irq) \
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{ \
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return gic_bmp_test_bit(irq, s->BMP); \
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} \
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static inline void gicv3_gicd_##BMP##_clear(GICv3State *s, int irq) \
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{ \
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gic_bmp_clear_bit(irq, s->BMP); \
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} \
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static inline void gicv3_gicd_##BMP##_replace(GICv3State *s, \
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int irq, int value) \
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{ \
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gic_bmp_replace_bit(irq, s->BMP, value); \
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}
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GICV3_BITMAP_ACCESSORS(group)
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GICV3_BITMAP_ACCESSORS(grpmod)
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GICV3_BITMAP_ACCESSORS(enabled)
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GICV3_BITMAP_ACCESSORS(pending)
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GICV3_BITMAP_ACCESSORS(active)
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GICV3_BITMAP_ACCESSORS(level)
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GICV3_BITMAP_ACCESSORS(edge_trigger)
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#define TYPE_ARM_GICV3_COMMON "arm-gicv3-common"
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#define ARM_GICV3_COMMON(obj) \
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OBJECT_CHECK(GICv3State, (obj), TYPE_ARM_GICV3_COMMON)
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#define ARM_GICV3_COMMON_CLASS(klass) \
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OBJECT_CLASS_CHECK(ARMGICv3CommonClass, (klass), TYPE_ARM_GICV3_COMMON)
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#define ARM_GICV3_COMMON_GET_CLASS(obj) \
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OBJECT_GET_CLASS(ARMGICv3CommonClass, (obj), TYPE_ARM_GICV3_COMMON)
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typedef struct ARMGICv3CommonClass {
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/*< private >*/
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SysBusDeviceClass parent_class;
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/*< public >*/
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void (*pre_save)(GICv3State *s);
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void (*post_load)(GICv3State *s);
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} ARMGICv3CommonClass;
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void gicv3_init_irqs_and_mmio(GICv3State *s, qemu_irq_handler handler,
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const MemoryRegionOps *ops);
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#endif
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