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|
/*
* Xen domain firmware emulation support
* Copyright (C) 2004 Hewlett-Packard Co.
* Dan Magenheimer (dan.magenheimer@hp.com)
*
* Copyright (c) 2006 Isaku Yamahata <yamahata at valinux co jp>
* VA Linux Systems Japan K.K.
* dom0 vp model support
*/
#include <xen/config.h>
#include <asm/system.h>
#include <asm/pgalloc.h>
#include <linux/efi.h>
#include <linux/sort.h>
#include <asm/io.h>
#include <asm/pal.h>
#include <asm/sal.h>
#include <asm/meminit.h>
#include <asm/fpswa.h>
#include <xen/version.h>
#include <xen/acpi.h>
#include <xen/errno.h>
#include <asm/dom_fw.h>
#include <asm/bundle.h>
#define ONE_MB (1UL << 20)
extern unsigned long running_on_sim;
#define FW_VENDOR "X\0e\0n\0/\0i\0a\0\066\0\064\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
#define MAKE_MD(typ, attr, start, end) \
do { \
md = tables->efi_memmap + i++; \
md->type = typ; \
md->pad = 0; \
md->phys_addr = start; \
md->virt_addr = 0; \
md->num_pages = (end - start) >> EFI_PAGE_SHIFT; \
md->attribute = attr; \
} while (0)
#define EFI_HYPERCALL_PATCH(tgt, call) \
do { \
dom_efi_hypercall_patch(d, FW_HYPERCALL_##call##_PADDR, \
FW_HYPERCALL_##call, hypercalls_imva); \
/* Descriptor address. */ \
tables->efi_runtime.tgt = \
FW_FIELD_MPA(func_ptrs) + 8 * pfn; \
/* Descriptor. */ \
tables->func_ptrs[pfn++] = FW_HYPERCALL_##call##_PADDR; \
tables->func_ptrs[pfn++] = 0; \
} while (0)
// allocate a page for fw
// build_physmap_table() which is called by new_thread()
// does for domU.
static inline void
assign_new_domain_page_if_dom0(struct domain *d, unsigned long mpaddr)
{
if (d == dom0)
assign_new_domain0_page(d, mpaddr);
}
/**************************************************************************
Hypercall bundle creation
**************************************************************************/
static void
build_hypercall_bundle(u64 *imva, u64 brkimm, u64 hypnum, u64 ret)
{
INST64_A5 slot0;
INST64_I19 slot1;
INST64_B4 slot2;
IA64_BUNDLE bundle;
// slot1: mov r2 = hypnum (low 20 bits)
slot0.inst = 0;
slot0.qp = 0; slot0.r1 = 2; slot0.r3 = 0; slot0.major = 0x9;
slot0.imm7b = hypnum; slot0.imm9d = hypnum >> 7;
slot0.imm5c = hypnum >> 16; slot0.s = 0;
// slot1: break brkimm
slot1.inst = 0;
slot1.qp = 0; slot1.x6 = 0; slot1.x3 = 0; slot1.major = 0x0;
slot1.imm20 = brkimm; slot1.i = brkimm >> 20;
// if ret slot2: br.ret.sptk.many rp
// else slot2: br.cond.sptk.many rp
slot2.inst = 0; slot2.qp = 0; slot2.p = 1; slot2.b2 = 0;
slot2.wh = 0; slot2.d = 0; slot2.major = 0x0;
if (ret) {
slot2.btype = 4; slot2.x6 = 0x21;
}
else {
slot2.btype = 0; slot2.x6 = 0x20;
}
bundle.i64[0] = 0; bundle.i64[1] = 0;
bundle.template = 0x11;
bundle.slot0 = slot0.inst; bundle.slot2 = slot2.inst;
bundle.slot1a = slot1.inst; bundle.slot1b = slot1.inst >> 18;
imva[0] = bundle.i64[0]; imva[1] = bundle.i64[1];
ia64_fc(imva);
ia64_fc(imva + 1);
}
static void
build_pal_hypercall_bundles(u64 *imva, u64 brkimm, u64 hypnum)
{
extern unsigned long pal_call_stub[];
IA64_BUNDLE bundle;
INST64_A5 slot_a5;
INST64_M37 slot_m37;
/* The source of the hypercall stub is the pal_call_stub function
defined in xenasm.S. */
/* Copy the first bundle and patch the hypercall number. */
bundle.i64[0] = pal_call_stub[0];
bundle.i64[1] = pal_call_stub[1];
slot_a5.inst = bundle.slot0;
slot_a5.imm7b = hypnum;
slot_a5.imm9d = hypnum >> 7;
slot_a5.imm5c = hypnum >> 16;
bundle.slot0 = slot_a5.inst;
imva[0] = bundle.i64[0];
imva[1] = bundle.i64[1];
ia64_fc(imva);
ia64_fc(imva + 1);
/* Copy the second bundle and patch the hypercall vector. */
bundle.i64[0] = pal_call_stub[2];
bundle.i64[1] = pal_call_stub[3];
slot_m37.inst = bundle.slot0;
slot_m37.imm20a = brkimm;
slot_m37.i = brkimm >> 20;
bundle.slot0 = slot_m37.inst;
imva[2] = bundle.i64[0];
imva[3] = bundle.i64[1];
ia64_fc(imva + 2);
ia64_fc(imva + 3);
}
// builds a hypercall bundle at domain physical address
static void
dom_fpswa_hypercall_patch(struct domain *d, unsigned long imva)
{
unsigned long *entry_imva, *patch_imva;
const unsigned long entry_paddr = FW_HYPERCALL_FPSWA_ENTRY_PADDR;
const unsigned long patch_paddr = FW_HYPERCALL_FPSWA_PATCH_PADDR;
entry_imva = (unsigned long *)(imva + entry_paddr -
FW_HYPERCALL_BASE_PADDR);
patch_imva = (unsigned long *)(imva + patch_paddr -
FW_HYPERCALL_BASE_PADDR);
/* Descriptor. */
*entry_imva++ = patch_paddr;
*entry_imva = 0;
build_hypercall_bundle(patch_imva, d->arch.breakimm,
FW_HYPERCALL_FPSWA, 1);
}
// builds a hypercall bundle at domain physical address
static void
dom_efi_hypercall_patch(struct domain *d, unsigned long paddr,
unsigned long hypercall, unsigned long imva)
{
build_hypercall_bundle((u64 *)(imva + paddr - FW_HYPERCALL_BASE_PADDR),
d->arch.breakimm, hypercall, 1);
}
// builds a hypercall bundle at domain physical address
static void
dom_fw_hypercall_patch(struct domain *d, unsigned long paddr,
unsigned long hypercall,unsigned long ret,
unsigned long imva)
{
build_hypercall_bundle((u64 *)(imva + paddr - FW_HYPERCALL_BASE_PADDR),
d->arch.breakimm, hypercall, ret);
}
static void
dom_fw_pal_hypercall_patch(struct domain *d, unsigned long paddr,
unsigned long imva)
{
build_pal_hypercall_bundles((u64*)(imva + paddr -
FW_HYPERCALL_BASE_PADDR),
d->arch.breakimm, FW_HYPERCALL_PAL_CALL);
}
static inline void
print_md(efi_memory_desc_t *md)
{
u64 size;
printk("dom mem: type=%2u, attr=0x%016lx, range=[0x%016lx-0x%016lx) ",
md->type, md->attribute, md->phys_addr,
md->phys_addr + (md->num_pages << EFI_PAGE_SHIFT));
size = md->num_pages << EFI_PAGE_SHIFT;
if (size > ONE_MB)
printk ("(%luMB)\n", size >> 20);
else
printk ("(%luKB)\n", size >> 10);
}
static u32 lsapic_nbr;
/* Modify lsapic table. Provides LPs. */
static int
acpi_update_lsapic (acpi_table_entry_header *header, const unsigned long end)
{
struct acpi_table_lsapic *lsapic;
int enable;
lsapic = (struct acpi_table_lsapic *) header;
if (!lsapic)
return -EINVAL;
if (lsapic_nbr < MAX_VIRT_CPUS && dom0->vcpu[lsapic_nbr] != NULL)
enable = 1;
else
enable = 0;
if (lsapic->flags.enabled && enable) {
printk("enable lsapic entry: 0x%lx\n", (u64)lsapic);
lsapic->id = lsapic_nbr;
lsapic->eid = 0;
lsapic_nbr++;
} else if (lsapic->flags.enabled) {
printk("DISABLE lsapic entry: 0x%lx\n", (u64)lsapic);
lsapic->flags.enabled = 0;
lsapic->id = 0;
lsapic->eid = 0;
}
return 0;
}
static u8
generate_acpi_checksum(void *tbl, unsigned long len)
{
u8 *ptr, sum = 0;
for (ptr = tbl; len > 0 ; len--, ptr++)
sum += *ptr;
return 0 - sum;
}
static int
acpi_update_madt_checksum (unsigned long phys_addr, unsigned long size)
{
struct acpi_table_madt* acpi_madt;
if (!phys_addr || !size)
return -EINVAL;
acpi_madt = (struct acpi_table_madt *) __va(phys_addr);
acpi_madt->header.checksum = 0;
acpi_madt->header.checksum = generate_acpi_checksum(acpi_madt, size);
return 0;
}
/* base is physical address of acpi table */
static void touch_acpi_table(void)
{
lsapic_nbr = 0;
if (acpi_table_parse_madt(ACPI_MADT_LSAPIC, acpi_update_lsapic, 0) < 0)
printk("Error parsing MADT - no LAPIC entires\n");
acpi_table_parse(ACPI_APIC, acpi_update_madt_checksum);
return;
}
struct fake_acpi_tables {
struct acpi20_table_rsdp rsdp;
struct xsdt_descriptor_rev2 xsdt;
u64 madt_ptr;
struct fadt_descriptor_rev2 fadt;
struct facs_descriptor_rev2 facs;
struct acpi_table_header dsdt;
u8 aml[8 + 11 * MAX_VIRT_CPUS];
struct acpi_table_madt madt;
struct acpi_table_lsapic lsapic[MAX_VIRT_CPUS];
u8 pm1a_evt_blk[4];
u8 pm1a_cnt_blk[1];
u8 pm_tmr_blk[4];
};
#define ACPI_TABLE_MPA(field) \
FW_ACPI_BASE_PADDR + offsetof(struct fake_acpi_tables, field);
/* Create enough of an ACPI structure to make the guest OS ACPI happy. */
static void
dom_fw_fake_acpi(struct domain *d, struct fake_acpi_tables *tables)
{
struct acpi20_table_rsdp *rsdp = &tables->rsdp;
struct xsdt_descriptor_rev2 *xsdt = &tables->xsdt;
struct fadt_descriptor_rev2 *fadt = &tables->fadt;
struct facs_descriptor_rev2 *facs = &tables->facs;
struct acpi_table_header *dsdt = &tables->dsdt;
struct acpi_table_madt *madt = &tables->madt;
struct acpi_table_lsapic *lsapic = tables->lsapic;
int i;
int aml_len;
int nbr_cpus;
memset(tables, 0, sizeof(struct fake_acpi_tables));
/* setup XSDT (64bit version of RSDT) */
strncpy(xsdt->signature, XSDT_SIG, 4);
/* XSDT points to both the FADT and the MADT, so add one entry */
xsdt->length = sizeof(struct xsdt_descriptor_rev2) + sizeof(u64);
xsdt->revision = 1;
strcpy(xsdt->oem_id, "XEN");
strcpy(xsdt->oem_table_id, "Xen/ia64");
strcpy(xsdt->asl_compiler_id, "XEN");
xsdt->asl_compiler_revision = (xen_major_version() << 16) |
xen_minor_version();
xsdt->table_offset_entry[0] = ACPI_TABLE_MPA(fadt);
tables->madt_ptr = ACPI_TABLE_MPA(madt);
xsdt->checksum = generate_acpi_checksum(xsdt, xsdt->length);
/* setup FADT */
strncpy(fadt->signature, FADT_SIG, 4);
fadt->length = sizeof(struct fadt_descriptor_rev2);
fadt->revision = FADT2_REVISION_ID;
strcpy(fadt->oem_id, "XEN");
strcpy(fadt->oem_table_id, "Xen/ia64");
strcpy(fadt->asl_compiler_id, "XEN");
fadt->asl_compiler_revision = (xen_major_version() << 16) |
xen_minor_version();
strncpy(facs->signature, FACS_SIG, 4);
facs->version = 1;
facs->length = sizeof(struct facs_descriptor_rev2);
fadt->xfirmware_ctrl = ACPI_TABLE_MPA(facs);
fadt->Xdsdt = ACPI_TABLE_MPA(dsdt);
/*
* All of the below FADT entries are filled it to prevent warnings
* from sanity checks in the ACPI CA. Emulate required ACPI hardware
* registers in system memory.
*/
fadt->pm1_evt_len = 4;
fadt->xpm1a_evt_blk.address_space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY;
fadt->xpm1a_evt_blk.register_bit_width = 8;
fadt->xpm1a_evt_blk.address = ACPI_TABLE_MPA(pm1a_evt_blk);
fadt->pm1_cnt_len = 1;
fadt->xpm1a_cnt_blk.address_space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY;
fadt->xpm1a_cnt_blk.register_bit_width = 8;
fadt->xpm1a_cnt_blk.address = ACPI_TABLE_MPA(pm1a_cnt_blk);
fadt->pm_tm_len = 4;
fadt->xpm_tmr_blk.address_space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY;
fadt->xpm_tmr_blk.register_bit_width = 8;
fadt->xpm_tmr_blk.address = ACPI_TABLE_MPA(pm_tmr_blk);
fadt->checksum = generate_acpi_checksum(fadt, fadt->length);
/* setup RSDP */
strncpy(rsdp->signature, RSDP_SIG, 8);
strcpy(rsdp->oem_id, "XEN");
rsdp->revision = 2; /* ACPI 2.0 includes XSDT */
rsdp->length = sizeof(struct acpi20_table_rsdp);
rsdp->xsdt_address = ACPI_TABLE_MPA(xsdt);
rsdp->checksum = generate_acpi_checksum(rsdp,
ACPI_RSDP_CHECKSUM_LENGTH);
rsdp->ext_checksum = generate_acpi_checksum(rsdp, rsdp->length);
/* setup DSDT with trivial namespace. */
strncpy(dsdt->signature, DSDT_SIG, 4);
dsdt->revision = 1;
strcpy(dsdt->oem_id, "XEN");
strcpy(dsdt->oem_table_id, "Xen/ia64");
strcpy(dsdt->asl_compiler_id, "XEN");
dsdt->asl_compiler_revision = (xen_major_version() << 16) |
xen_minor_version();
/* Trivial namespace, avoids ACPI CA complaints */
tables->aml[0] = 0x10; /* Scope */
tables->aml[1] = 0x40; /* length/offset to next object (patched) */
tables->aml[2] = 0x00;
strncpy((char *)&tables->aml[3], "_SB_", 4);
/* The processor object isn't absolutely necessary, revist for SMP */
aml_len = 7;
for (i = 0; i < 3; i++) {
unsigned char *p = tables->aml + aml_len;
p[0] = 0x5b; /* processor object */
p[1] = 0x83;
p[2] = 0x0b; /* next */
p[3] = 'C';
p[4] = 'P';
snprintf ((char *)p + 5, 3, "%02x", i);
if (i < 16)
p[5] = 'U';
p[7] = i; /* acpi_id */
p[8] = 0; /* pblk_addr */
p[9] = 0;
p[10] = 0;
p[11] = 0;
p[12] = 0; /* pblk_len */
aml_len += 13;
}
tables->aml[1] = 0x40 + ((aml_len - 1) & 0x0f);
tables->aml[2] = (aml_len - 1) >> 4;
dsdt->length = sizeof(struct acpi_table_header) + aml_len;
dsdt->checksum = generate_acpi_checksum(dsdt, dsdt->length);
/* setup MADT */
strncpy(madt->header.signature, APIC_SIG, 4);
madt->header.revision = 2;
strcpy(madt->header.oem_id, "XEN");
strcpy(madt->header.oem_table_id, "Xen/ia64");
strcpy(madt->header.asl_compiler_id, "XEN");
madt->header.asl_compiler_revision = (xen_major_version() << 16) |
xen_minor_version();
/* An LSAPIC entry describes a CPU. */
nbr_cpus = 0;
for (i = 0; i < MAX_VIRT_CPUS; i++) {
lsapic[i].header.type = ACPI_MADT_LSAPIC;
lsapic[i].header.length = sizeof(struct acpi_table_lsapic);
lsapic[i].acpi_id = i;
lsapic[i].id = i;
lsapic[i].eid = 0;
if (d->vcpu[i] != NULL) {
lsapic[i].flags.enabled = 1;
nbr_cpus++;
}
}
madt->header.length = sizeof(struct acpi_table_madt) +
nbr_cpus * sizeof(struct acpi_table_lsapic);
madt->header.checksum = generate_acpi_checksum(madt,
madt->header.length);
return;
}
static int
efi_mdt_cmp(const void *a, const void *b)
{
const efi_memory_desc_t *x = a, *y = b;
if (x->phys_addr > y->phys_addr)
return 1;
if (x->phys_addr < y->phys_addr)
return -1;
// num_pages == 0 is allowed.
if (x->num_pages > y->num_pages)
return 1;
if (x->num_pages < y->num_pages)
return -1;
return 0;
}
#define NFUNCPTRS 16
#define NUM_EFI_SYS_TABLES 6
#define NUM_MEM_DESCS 64 //large enough
struct fw_tables {
efi_system_table_t efi_systab;
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