mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-12-29 17:25:38 +00:00
bcea31e2d1
Under arch/x86/xen there is one large private header file xen-ops.h containing most of the Xen-private x86 related declarations, and then there are several small headers with a handful of declarations each. Merge the small headers into xen-ops.h. While doing that, move the declaration of xen_fifo_events from xen-ops.h into include/xen/events.h where it should have been from the beginning. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Message-ID: <20240710093718.14552-3-jgross@suse.com> Signed-off-by: Juergen Gross <jgross@suse.com>
149 lines
2.9 KiB
C
149 lines
2.9 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
#include <linux/init.h>
|
|
#include <linux/thread_info.h>
|
|
|
|
#include <asm/x86_init.h>
|
|
#include <asm/apic.h>
|
|
#include <asm/io_apic.h>
|
|
#include <asm/xen/hypercall.h>
|
|
|
|
#include <xen/xen.h>
|
|
#include <xen/interface/physdev.h>
|
|
#include "xen-ops.h"
|
|
|
|
static unsigned int xen_io_apic_read(unsigned apic, unsigned reg)
|
|
{
|
|
struct physdev_apic apic_op;
|
|
int ret;
|
|
|
|
apic_op.apic_physbase = mpc_ioapic_addr(apic);
|
|
apic_op.reg = reg;
|
|
ret = HYPERVISOR_physdev_op(PHYSDEVOP_apic_read, &apic_op);
|
|
if (!ret)
|
|
return apic_op.value;
|
|
|
|
/* fallback to return an emulated IO_APIC values */
|
|
if (reg == 0x1)
|
|
return 0x00170020;
|
|
else if (reg == 0x0)
|
|
return apic << 24;
|
|
|
|
return 0xfd;
|
|
}
|
|
|
|
static u32 xen_get_apic_id(u32 x)
|
|
{
|
|
return ((x)>>24) & 0xFFu;
|
|
}
|
|
|
|
static u32 xen_apic_read(u32 reg)
|
|
{
|
|
struct xen_platform_op op = {
|
|
.cmd = XENPF_get_cpuinfo,
|
|
.interface_version = XENPF_INTERFACE_VERSION,
|
|
};
|
|
int ret, cpu;
|
|
|
|
if (reg == APIC_LVR)
|
|
return 0x14;
|
|
if (reg != APIC_ID)
|
|
return 0;
|
|
|
|
cpu = smp_processor_id();
|
|
if (!xen_initial_domain())
|
|
return cpu ? cpuid_to_apicid[cpu] << 24 : 0;
|
|
|
|
op.u.pcpu_info.xen_cpuid = cpu;
|
|
|
|
ret = HYPERVISOR_platform_op(&op);
|
|
if (ret)
|
|
op.u.pcpu_info.apic_id = BAD_APICID;
|
|
|
|
return op.u.pcpu_info.apic_id << 24;
|
|
}
|
|
|
|
static void xen_apic_write(u32 reg, u32 val)
|
|
{
|
|
if (reg == APIC_LVTPC) {
|
|
(void)pmu_apic_update(reg);
|
|
return;
|
|
}
|
|
|
|
/* Warn to see if there's any stray references */
|
|
WARN(1,"register: %x, value: %x\n", reg, val);
|
|
}
|
|
|
|
static void xen_apic_eoi(void)
|
|
{
|
|
WARN_ON_ONCE(1);
|
|
}
|
|
|
|
static u64 xen_apic_icr_read(void)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static void xen_apic_icr_write(u32 low, u32 id)
|
|
{
|
|
/* Warn to see if there's any stray references */
|
|
WARN_ON(1);
|
|
}
|
|
|
|
static int xen_apic_probe_pv(void)
|
|
{
|
|
if (xen_pv_domain())
|
|
return 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int xen_madt_oem_check(char *oem_id, char *oem_table_id)
|
|
{
|
|
return xen_pv_domain();
|
|
}
|
|
|
|
static u32 xen_cpu_present_to_apicid(int cpu)
|
|
{
|
|
if (cpu_present(cpu))
|
|
return cpu_data(cpu).topo.apicid;
|
|
else
|
|
return BAD_APICID;
|
|
}
|
|
|
|
static struct apic xen_pv_apic __ro_after_init = {
|
|
.name = "Xen PV",
|
|
.probe = xen_apic_probe_pv,
|
|
.acpi_madt_oem_check = xen_madt_oem_check,
|
|
|
|
/* .delivery_mode and .dest_mode_logical not used by XENPV */
|
|
|
|
.disable_esr = 0,
|
|
|
|
.cpu_present_to_apicid = xen_cpu_present_to_apicid,
|
|
|
|
.max_apic_id = UINT_MAX,
|
|
.get_apic_id = xen_get_apic_id,
|
|
|
|
.calc_dest_apicid = apic_flat_calc_apicid,
|
|
|
|
#ifdef CONFIG_SMP
|
|
.send_IPI_mask = xen_send_IPI_mask,
|
|
.send_IPI_mask_allbutself = xen_send_IPI_mask_allbutself,
|
|
.send_IPI_allbutself = xen_send_IPI_allbutself,
|
|
.send_IPI_all = xen_send_IPI_all,
|
|
.send_IPI_self = xen_send_IPI_self,
|
|
#endif
|
|
.read = xen_apic_read,
|
|
.write = xen_apic_write,
|
|
.eoi = xen_apic_eoi,
|
|
|
|
.icr_read = xen_apic_icr_read,
|
|
.icr_write = xen_apic_icr_write,
|
|
};
|
|
apic_driver(xen_pv_apic);
|
|
|
|
void __init xen_init_apic(void)
|
|
{
|
|
x86_apic_ops.io_apic_read = xen_io_apic_read;
|
|
}
|