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[Qemu-devel] [PATCHv2] load hpet info for HPET ACPI table from qemu
From: |
Gleb Natapov |
Subject: |
[Qemu-devel] [PATCHv2] load hpet info for HPET ACPI table from qemu |
Date: |
Mon, 14 Jun 2010 11:30:53 +0300 |
Load hpet info for HPET ACPI table from qemu instead of using hardcoded
values. Use hardcoded values anyway if old qemu is detected.
Signed-off-by: Gleb Natapov <address@hidden>
diff --git a/src/acpi.c b/src/acpi.c
index 0559443..864f1a8 100644
--- a/src/acpi.c
+++ b/src/acpi.c
@@ -469,7 +469,7 @@ build_ssdt(void)
#define HPET_SIGNATURE 0x54455048 //HPET
static void*
-build_hpet(void)
+build_hpet(struct hpet_fw_entry *e, u8 id)
{
struct acpi_20_hpet *hpet = malloc_high(sizeof(*hpet));
if (!hpet) {
@@ -478,11 +478,11 @@ build_hpet(void)
}
memset(hpet, 0, sizeof(*hpet));
- /* Note timer_block_id value must be kept in sync with value advertised by
- * emulated hpet
- */
- hpet->timer_block_id = cpu_to_le32(0x8086a201);
- hpet->addr.address = cpu_to_le32(ACPI_HPET_ADDRESS);
+ hpet->timer_block_id = cpu_to_le32(e->event_timer_block_id);
+ hpet->addr.address = cpu_to_le32(e->address);
+ hpet->min_tick = cpu_to_le32(e->min_tick);
+ hpet->hpet_number = id;
+ hpet->page_protect = e->page_prot;
build_header((void*)hpet, HPET_SIGNATURE, sizeof(*hpet), 1);
return hpet;
@@ -637,9 +637,27 @@ acpi_bios_init(void)
ACPI_INIT_TABLE(build_fadt(bdf));
ACPI_INIT_TABLE(build_ssdt());
ACPI_INIT_TABLE(build_madt());
- ACPI_INIT_TABLE(build_hpet());
ACPI_INIT_TABLE(build_srat());
+ u8 hpet_id, c = qemu_cfg_hpet_entries();
+ struct hpet_fw_entry e;
+
+ if (c == ~0) {
+ /* qemu do not provide hpet description */
+ e.event_timer_block_id = 0x8086a201;
+ e.address = ACPI_HPET_ADDRESS;
+ e.min_tick = 0;
+ c = 1;
+ } else if (c != 0)
+ qemu_cfg_hpet_load_next(&e);
+
+ while (c--) {
+ ACPI_INIT_TABLE(build_hpet(&e, hpet_id++));
+ if (c)
+ qemu_cfg_hpet_load_next(&e);
+ }
+
+
u16 i, external_tables = qemu_cfg_acpi_additional_tables();
for(i = 0; i < external_tables; i++) {
diff --git a/src/paravirt.c b/src/paravirt.c
index 5c77b5c..458ab08 100644
--- a/src/paravirt.c
+++ b/src/paravirt.c
@@ -149,6 +149,23 @@ void* qemu_cfg_e820_load_next(void *addr)
return addr;
}
+u8 qemu_cfg_hpet_entries(void)
+{
+ u8 cnt;
+
+ if (!qemu_cfg_present)
+ return 0;
+
+ /* read valid flags */
+ qemu_cfg_read_entry(&cnt, QEMU_CFG_HPET, sizeof(cnt));
+ return cnt;
+}
+
+void qemu_cfg_hpet_load_next(struct hpet_fw_entry *e)
+{
+ qemu_cfg_read((u8*)e, sizeof(*e));
+}
+
struct smbios_header {
u16 length;
u8 type;
diff --git a/src/paravirt.h b/src/paravirt.h
index c46418f..272af81 100644
--- a/src/paravirt.h
+++ b/src/paravirt.h
@@ -37,6 +37,7 @@ static inline int kvm_para_available(void)
#define QEMU_CFG_SMBIOS_ENTRIES (QEMU_CFG_ARCH_LOCAL + 1)
#define QEMU_CFG_IRQ0_OVERRIDE (QEMU_CFG_ARCH_LOCAL + 2)
#define QEMU_CFG_E820_TABLE (QEMU_CFG_ARCH_LOCAL + 3)
+#define QEMU_CFG_HPET (QEMU_CFG_ARCH_LOCAL + 4)
extern int qemu_cfg_present;
@@ -68,10 +69,20 @@ struct e820_reservation {
u32 type;
};
+struct hpet_fw_entry
+{
+ u32 event_timer_block_id;
+ u64 address;
+ u16 min_tick;
+ u8 page_prot;
+} __attribute__ ((packed));
+
u16 qemu_cfg_first_file(QemuCfgFile *entry);
u16 qemu_cfg_next_file(QemuCfgFile *entry);
u32 qemu_cfg_read_file(QemuCfgFile *entry, void *dst, u32 maxlen);
u32 qemu_cfg_e820_entries(void);
void* qemu_cfg_e820_load_next(void *addr);
+u8 qemu_cfg_hpet_entries(void);
+void qemu_cfg_hpet_load_next(struct hpet_fw_entry *e);
#endif
--
Gleb.
- [Qemu-devel] [PATCHv2] load hpet info for HPET ACPI table from qemu,
Gleb Natapov <=
- [Qemu-devel] Re: [SeaBIOS] [PATCHv2] load hpet info for HPET ACPI table from qemu, Kevin O'Connor, 2010/06/14
- [Qemu-devel] Re: [SeaBIOS] [PATCHv2] load hpet info for HPET ACPI table from qemu, Gleb Natapov, 2010/06/14
- [Qemu-devel] Re: [SeaBIOS] [PATCHv2] load hpet info for HPET ACPI table from qemu, Avi Kivity, 2010/06/14
- [Qemu-devel] Re: [SeaBIOS] [PATCHv2] load hpet info for HPET ACPI table from qemu, Kevin O'Connor, 2010/06/14
- [Qemu-devel] Re: [SeaBIOS] [PATCHv2] load hpet info for HPET ACPI table from qemu, Gleb Natapov, 2010/06/14
- [Qemu-devel] Re: [SeaBIOS] [PATCHv2] load hpet info for HPET ACPI table from qemu, Kevin O'Connor, 2010/06/14
- [Qemu-devel] Re: [SeaBIOS] [PATCHv2] load hpet info for HPET ACPI table from qemu, Gleb Natapov, 2010/06/15
- [Qemu-devel] Re: [SeaBIOS] [PATCHv2] load hpet info for HPET ACPI table from qemu, Kevin O'Connor, 2010/06/16