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[PULL 30/36] hostmem-epc: Add the reset interface for EPC backend reset
From: |
Paolo Bonzini |
Subject: |
[PULL 30/36] hostmem-epc: Add the reset interface for EPC backend reset |
Date: |
Mon, 6 Sep 2021 15:10:53 +0200 |
From: Yang Zhong <yang.zhong@intel.com>
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>
Message-Id: <20210719112136.57018-23-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.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 b274179307..a1034aa262 100644
--- a/include/hw/i386/pc.h
+++ b/include/hw/i386/pc.h
@@ -207,6 +207,8 @@ 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;
--
2.31.1
- [PULL 11/36] qom: Add memory-backend-epc ObjectOptions support, (continued)
- [PULL 11/36] qom: Add memory-backend-epc ObjectOptions support, Paolo Bonzini, 2021/09/06
- [PULL 18/36] i386: Add get/set/migrate support for SGX_LEPUBKEYHASH MSRs, Paolo Bonzini, 2021/09/06
- [PULL 21/36] i386: kvm: Add support for exposing PROVISIONKEY to guest, Paolo Bonzini, 2021/09/06
- [PULL 23/36] Adjust min CPUID level to 0x12 when SGX is enabled, Paolo Bonzini, 2021/09/06
- [PULL 25/36] hw/i386/pc: Account for SGX EPC sections when calculating device memory, Paolo Bonzini, 2021/09/06
- [PULL 28/36] q35: Add support for SGX EPC, Paolo Bonzini, 2021/09/06
- [PULL 27/36] i386: acpi: Add SGX EPC entry to ACPI tables, Paolo Bonzini, 2021/09/06
- [PULL 26/36] i386/pc: Add e820 entry for SGX EPC section(s), Paolo Bonzini, 2021/09/06
- [PULL 29/36] i440fx: Add support for SGX EPC, Paolo Bonzini, 2021/09/06
- [PULL 31/36] sgx-epc: Add the reset interface for sgx-epc virt device, Paolo Bonzini, 2021/09/06
- [PULL 30/36] hostmem-epc: Add the reset interface for EPC backend reset,
Paolo Bonzini <=
- [PULL 32/36] sgx-epc: Avoid bios reset during sgx epc initialization, Paolo Bonzini, 2021/09/06
- [PULL 33/36] hostmem-epc: Make prealloc consistent with qemu cmdline during reset, Paolo Bonzini, 2021/09/06
- [PULL 35/36] sgx-epc: Add the fill_device_info() callback support, Paolo Bonzini, 2021/09/06
- [PULL 34/36] Kconfig: Add CONFIG_SGX support, Paolo Bonzini, 2021/09/06
- [PULL 36/36] doc: Add the SGX doc, Paolo Bonzini, 2021/09/06
- Re: [PULL 00/36] (Mostly) x86 changes for 2021-09-06, Peter Maydell, 2021/09/06