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[PATCH v3 22/33] hostmem-epc: Add the reset interface for EPC backend re
From: |
Yang Zhong |
Subject: |
[PATCH v3 22/33] hostmem-epc: Add the reset interface for EPC backend reset |
Date: |
Fri, 9 Jul 2021 19:09:44 +0800 |
Add the sgx_memory_backend_reset() interface to handle EPC backend
reset when VM is reset. This reset function will destroy previous
backend memory region and re-mmap the EPC section for guest.
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
---
backends/hostmem-epc.c | 16 ++++++++++++++++
include/hw/i386/pc.h | 2 ++
2 files changed, 18 insertions(+)
diff --git a/backends/hostmem-epc.c b/backends/hostmem-epc.c
index b512a68cb0..3bd1535d82 100644
--- a/backends/hostmem-epc.c
+++ b/backends/hostmem-epc.c
@@ -16,6 +16,7 @@
#include "qom/object_interfaces.h"
#include "qapi/error.h"
#include "sysemu/hostmem.h"
+#include "hw/i386/pc.h"
#define TYPE_MEMORY_BACKEND_EPC "memory-backend-epc"
@@ -55,6 +56,21 @@ sgx_epc_backend_memory_alloc(HostMemoryBackend *backend,
Error **errp)
g_free(name);
}
+void sgx_memory_backend_reset(HostMemoryBackend *backend, int fd,
+ Error **errp)
+{
+ MemoryRegion *mr = &backend->mr;
+
+ mr->enabled = false;
+
+ /* destroy the old memory region if it exist */
+ if (fd > 0 && mr->destructor) {
+ mr->destructor(mr);
+ }
+
+ sgx_epc_backend_memory_alloc(backend, errp);
+}
+
static void sgx_epc_backend_instance_init(Object *obj)
{
HostMemoryBackend *m = MEMORY_BACKEND(obj);
diff --git a/include/hw/i386/pc.h b/include/hw/i386/pc.h
index c22f5eded6..f603e2f75a 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -202,6 +202,8 @@ extern const size_t pc_compat_6_0_len;
/* sgx-epc.c */
void pc_machine_init_sgx_epc(PCMachineState *pcms);
+void sgx_memory_backend_reset(HostMemoryBackend *backend, int fd,
+ Error **errp);
extern GlobalProperty pc_compat_5_2[];
extern const size_t pc_compat_5_2_len;
--
2.29.2.334.gfaefdd61ec
- [PATCH v3 12/33] i386: Update SGX CPUID info according to hardware/KVM/user input, (continued)
- [PATCH v3 12/33] i386: Update SGX CPUID info according to hardware/KVM/user input, Yang Zhong, 2021/07/09
- [PATCH v3 14/33] i386: Propagate SGX CPUID sub-leafs to KVM, Yang Zhong, 2021/07/09
- [PATCH v3 13/33] i386: kvm: Add support for exposing PROVISIONKEY to guest, Yang Zhong, 2021/07/09
- [PATCH v3 15/33] Adjust min CPUID level to 0x12 when SGX is enabled, Yang Zhong, 2021/07/09
- [PATCH v3 16/33] hw/i386/fw_cfg: Set SGX bits in feature control fw_cfg accordingly, Yang Zhong, 2021/07/09
- [PATCH v3 17/33] hw/i386/pc: Account for SGX EPC sections when calculating device memory, Yang Zhong, 2021/07/09
- [PATCH v3 18/33] i386/pc: Add e820 entry for SGX EPC section(s), Yang Zhong, 2021/07/09
- [PATCH v3 19/33] i386: acpi: Add SGX EPC entry to ACPI tables, Yang Zhong, 2021/07/09
- [PATCH v3 21/33] i440fx: Add support for SGX EPC, Yang Zhong, 2021/07/09
- [PATCH v3 20/33] q35: Add support for SGX EPC, Yang Zhong, 2021/07/09
- [PATCH v3 22/33] hostmem-epc: Add the reset interface for EPC backend reset,
Yang Zhong <=
- [PATCH v3 23/33] sgx-epc: Add the reset interface for sgx-epc virt device, Yang Zhong, 2021/07/09
- [PATCH v3 24/33] sgx-epc: Avoid bios reset during sgx epc initialization, Yang Zhong, 2021/07/09
- [PATCH v3 25/33] hostmem-epc: Make prealloc consistent with qemu cmdline during reset, Yang Zhong, 2021/07/09
- [PATCH v3 26/33] qmp: Add query-sgx command, Yang Zhong, 2021/07/09
- [PATCH v3 28/33] i386: Add sgx_get_info() interface, Yang Zhong, 2021/07/09
- [PATCH v3 27/33] hmp: Add 'info sgx' command, Yang Zhong, 2021/07/09
- [PATCH v3 29/33] bitops: Support 32 and 64 bit mask macro, Yang Zhong, 2021/07/09
- [PATCH v3 30/33] qmp: Add the qmp_query_sgx_capabilities(), Yang Zhong, 2021/07/09
- [PATCH v3 31/33] Kconfig: Add CONFIG_SGX support, Yang Zhong, 2021/07/09
- [PATCH v3 32/33] sgx-epc: Add the fill_device_info() callback support, Yang Zhong, 2021/07/09