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[Qemu-devel] [PATCH 17/31] q35: implement high SMRAM
From: |
Paolo Bonzini |
Subject: |
[Qemu-devel] [PATCH 17/31] q35: implement high SMRAM |
Date: |
Mon, 11 May 2015 15:49:03 +0200 |
When H_SMRAME is 1, low memory at 0xa0000 is left alone by
SMM, and instead the chipset maps the 0xa0000-0xbffff window at
0xfeda0000-0xfedbffff. This affects both the "non-SMM" view controlled
by D_OPEN and the SMM view controlled by G_SMRAME, so add two new
MemoryRegions and toggle the enabled/disabled state of all four
in mch_update_smram.
Signed-off-by: Paolo Bonzini <address@hidden>
---
hw/pci-host/q35.c | 35 +++++++++++++++++++++++++++++++----
include/hw/pci-host/q35.h | 16 ++++++++--------
2 files changed, 39 insertions(+), 12 deletions(-)
diff --git a/hw/pci-host/q35.c b/hw/pci-host/q35.c
index e7372b1..35b89da 100644
--- a/hw/pci-host/q35.c
+++ b/hw/pci-host/q35.c
@@ -266,12 +266,29 @@ static void mch_update_pam(MCHPCIState *mch)
static void mch_update_smram(MCHPCIState *mch)
{
PCIDevice *pd = PCI_DEVICE(mch);
+ bool h_smrame = (pd->config[MCH_HOST_BRIDGE_ESMRAMC] &
MCH_HOST_BRIDGE_ESMRAMC_H_SMRAME);
memory_region_transaction_begin();
- memory_region_set_enabled(&mch->smram_region,
- !(pd->config[MCH_HOST_BRIDGE_SMRAM] &
SMRAM_D_OPEN));
- memory_region_set_enabled(&mch->smram,
- pd->config[MCH_HOST_BRIDGE_SMRAM] &
SMRAM_G_SMRAME);
+
+ if (pd->config[MCH_HOST_BRIDGE_SMRAM] & SMRAM_D_OPEN) {
+ /* Hide (!) low SMRAM if H_SMRAME = 1 */
+ memory_region_set_enabled(&mch->smram_region, h_smrame);
+ /* Show high SMRAM if H_SMRAME = 1 */
+ memory_region_set_enabled(&mch->open_high_smram, h_smrame);
+ } else {
+ /* Hide high SMRAM and low SMRAM */
+ memory_region_set_enabled(&mch->smram_region, true);
+ memory_region_set_enabled(&mch->open_high_smram, false);
+ }
+
+ if (pd->config[MCH_HOST_BRIDGE_SMRAM] & SMRAM_G_SMRAME) {
+ memory_region_set_enabled(&mch->low_smram, !h_smrame);
+ memory_region_set_enabled(&mch->high_smram, h_smrame);
+ } else {
+ memory_region_set_enabled(&mch->low_smram, false);
+ memory_region_set_enabled(&mch->high_smram, false);
+ }
+
memory_region_transaction_commit();
}
@@ -397,6 +414,12 @@ static void mch_realize(PCIDevice *d, Error **errp)
&mch->smram_region, 1);
memory_region_set_enabled(&mch->smram_region, false);
+ memory_region_init_alias(&mch->open_high_smram, OBJECT(mch),
"smram-open-high",
+ mch->ram_memory, 0xa0000, 0x20000);
+ memory_region_add_subregion_overlap(mch->system_memory, 0xfeda0000,
+ &mch->open_high_smram, 1);
+ memory_region_set_enabled(&mch->open_high_smram, false);
+
/* smram, as seen by SMM CPUs */
memory_region_init(&mch->smram, OBJECT(mch), "smram", 1ull << 32);
memory_region_set_enabled(&mch->smram, true);
@@ -404,6 +427,10 @@ static void mch_realize(PCIDevice *d, Error **errp)
mch->ram_memory, 0xa0000, 0x20000);
memory_region_set_enabled(&mch->low_smram, true);
memory_region_add_subregion(&mch->smram, 0xa0000, &mch->low_smram);
+ memory_region_init_alias(&mch->high_smram, OBJECT(mch), "smram-high",
+ mch->ram_memory, 0xa0000, 0x20000);
+ memory_region_set_enabled(&mch->high_smram, true);
+ memory_region_add_subregion(&mch->smram, 0xfeda0000, &mch->high_smram);
object_property_add_const_link(qdev_get_machine(), "smram",
OBJECT(&mch->smram), &error_abort);
diff --git a/include/hw/pci-host/q35.h b/include/hw/pci-host/q35.h
index 17adeaa..0fff6a2 100644
--- a/include/hw/pci-host/q35.h
+++ b/include/hw/pci-host/q35.h
@@ -52,8 +52,8 @@ typedef struct MCHPCIState {
MemoryRegion *system_memory;
MemoryRegion *address_space_io;
PAMMemoryRegion pam_regions[13];
- MemoryRegion smram_region;
- MemoryRegion smram, low_smram;
+ MemoryRegion smram_region, open_high_smram;
+ MemoryRegion smram, low_smram, high_smram;
PcPciInfo pci_info;
ram_addr_t below_4g_mem_size;
ram_addr_t above_4g_mem_size;
@@ -127,7 +127,7 @@ typedef struct Q35PCIHost {
#define MCH_HOST_BRIDGE_PAM_MASK ((uint8_t)0x3)
#define MCH_HOST_BRIDGE_SMRAM 0x9d
-#define MCH_HOST_BRIDGE_SMRAM_SIZE 1
+#define MCH_HOST_BRIDGE_SMRAM_SIZE 2
#define MCH_HOST_BRIDGE_SMRAM_DEFAULT ((uint8_t)0x2)
#define MCH_HOST_BRIDGE_SMRAM_D_OPEN ((uint8_t)(1 << 6))
#define MCH_HOST_BRIDGE_SMRAM_D_CLS ((uint8_t)(1 << 5))
@@ -141,11 +141,11 @@ typedef struct Q35PCIHost {
#define MCH_HOST_BRIDGE_UPPER_SYSTEM_BIOS_END 0x100000
#define MCH_HOST_BRIDGE_ESMRAMC 0x9e
-#define MCH_HOST_BRIDGE_ESMRAMC_H_SMRAME ((uint8_t)(1 << 6))
-#define MCH_HOST_BRIDGE_ESMRAMC_E_SMERR ((uint8_t)(1 << 5))
-#define MCH_HOST_BRIDGE_ESMRAMC_SM_CACHE ((uint8_t)(1 << 4))
-#define MCH_HOST_BRIDGE_ESMRAMC_SM_L1 ((uint8_t)(1 << 3))
-#define MCH_HOST_BRIDGE_ESMRAMC_SM_L2 ((uint8_t)(1 << 2))
+#define MCH_HOST_BRIDGE_ESMRAMC_H_SMRAME ((uint8_t)(1 << 7))
+#define MCH_HOST_BRIDGE_ESMRAMC_E_SMERR ((uint8_t)(1 << 6))
+#define MCH_HOST_BRIDGE_ESMRAMC_SM_CACHE ((uint8_t)(1 << 5))
+#define MCH_HOST_BRIDGE_ESMRAMC_SM_L1 ((uint8_t)(1 << 4))
+#define MCH_HOST_BRIDGE_ESMRAMC_SM_L2 ((uint8_t)(1 << 3))
#define MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_MASK ((uint8_t)(0x3 << 1))
#define MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_1MB ((uint8_t)(0x0 << 1))
#define MCH_HOST_BRIDGE_ESMRAMC_TSEG_SZ_2MB ((uint8_t)(0x1 << 1))
--
1.8.3.1
- [Qemu-devel] [PATCH 03/31] target-i386: Use correct memory attributes for memory accesses, (continued)
- [Qemu-devel] [PATCH 03/31] target-i386: Use correct memory attributes for memory accesses, Paolo Bonzini, 2015/05/11
- [Qemu-devel] [PATCH 10/31] vl: allow full-blown QemuOpts syntax for -global, Paolo Bonzini, 2015/05/11
- [Qemu-devel] [PATCH 09/31] pflash_cfi01: add secure property, Paolo Bonzini, 2015/05/11
- [Qemu-devel] [PATCH 12/31] vl: run "late" notifiers immediately, Paolo Bonzini, 2015/05/11
- [Qemu-devel] [PATCH 13/31] target-i386: create a separate AddressSpace for each CPU, Paolo Bonzini, 2015/05/11
- [Qemu-devel] [PATCH 11/31] qom: add object_property_add_const_link, Paolo Bonzini, 2015/05/11
- [Qemu-devel] [PATCH 14/31] hw/i386: add a separate region that tracks the SMRAME bit, Paolo Bonzini, 2015/05/11
- [Qemu-devel] [PATCH 15/31] target-i386: use memory API to implement SMRAM, Paolo Bonzini, 2015/05/11
- [Qemu-devel] [PATCH 16/31] hw/i386: remove smram_update, Paolo Bonzini, 2015/05/11
- [Qemu-devel] [PATCH 17/31] q35: implement high SMRAM,
Paolo Bonzini <=
- [Qemu-devel] [PATCH 18/31] q35: fix ESMRAMC default, Paolo Bonzini, 2015/05/11
- [Qemu-devel] [PATCH 19/31] q35: add config space wmask for SMRAM and ESMRAMC, Paolo Bonzini, 2015/05/11
- [Qemu-devel] [PATCH 22/31] q35: implement TSEG, Paolo Bonzini, 2015/05/11
- [Qemu-devel] [PATCH 21/31] q35: add test for SMRAM.D_LCK, Paolo Bonzini, 2015/05/11
- [Qemu-devel] [PATCH 23/31] ich9: implement SMI_LOCK, Paolo Bonzini, 2015/05/11