Introduce support for confidential guest reset

[PATCH v1 12/28] i386/tdx: refactor TDX firmware memory initialization code into a new function

Ani Sinha posted 28 patches 1 day, 15 hours ago

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Maintainers: Paolo Bonzini <pbonzini@redhat.com>, "Maciej S. Szmigiero" <maciej.szmigiero@oracle.com>, "Michael S. Tsirkin" <mst@redhat.com>, Marcel Apfelbaum <marcel.apfelbaum@gmail.com>, Richard Henderson <richard.henderson@linaro.org>, Eduardo Habkost <eduardo@habkost.net>, David Woodhouse <dwmw2@infradead.org>, Paul Durrant <paul@xen.org>, Bernhard Beschow <shentey@gmail.com>, Alex Williamson <alex@shazbot.org>, "Cédric Le Goater" <clg@redhat.com>, "Philippe Mathieu-Daudé" <philmd@linaro.org>, Peter Xu <peterx@redhat.com>, David Hildenbrand <david@kernel.org>, Peter Maydell <peter.maydell@linaro.org>, Marcelo Tosatti <mtosatti@redhat.com>, Zhao Liu <zhao1.liu@intel.com>, Song Gao <gaosong@loongson.cn>, Huacai Chen <chenhuacai@kernel.org>, Aurelien Jarno <aurelien@aurel32.net>, Jiaxun Yang <jiaxun.yang@flygoat.com>, Aleksandar Rikalo <arikalo@gmail.com>, Nicholas Piggin <npiggin@gmail.com>, Harsh Prateek Bora <harshpb@linux.ibm.com>, Chinmay Rath <rathc@linux.ibm.com>, Palmer Dabbelt <palmer@dabbelt.com>, Alistair Francis <alistair.francis@wdc.com>, Weiwei Li <liwei1518@gmail.com>, Daniel Henrique Barboza <dbarboza@ventanamicro.com>, Liu Zhiwei <zhiwei_liu@linux.alibaba.com>, Halil Pasic <pasic@linux.ibm.com>, Christian Borntraeger <borntraeger@linux.ibm.com>, Eric Farman <farman@linux.ibm.com>, Matthew Rosato <mjrosato@linux.ibm.com>, Ilya Leoshkevich <iii@linux.ibm.com>, Thomas Huth <thuth@redhat.com>

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[PATCH v1 12/28] i386/tdx: refactor TDX firmware memory initialization code into a new function

Posted by Ani Sinha 1 day, 15 hours ago

A new helper function is introduced that refactors all firmware memory
initialization code into a separate function. No functional change.

Signed-off-by: Ani Sinha <anisinha@redhat.com>
---
 target/i386/kvm/tdx.c | 73 ++++++++++++++++++++++++-------------------
 1 file changed, 40 insertions(+), 33 deletions(-)

diff --git a/target/i386/kvm/tdx.c b/target/i386/kvm/tdx.c
index dbf0fa2c91..bafaf62cdb 100644
--- a/target/i386/kvm/tdx.c
+++ b/target/i386/kvm/tdx.c
@@ -295,14 +295,51 @@ static void tdx_post_init_vcpus(void)
     }
 }
 
-static void tdx_finalize_vm(Notifier *notifier, void *unused)
+static void tdx_init_fw_mem_region(void)
 {
     TdxFirmware *tdvf = &tdx_guest->tdvf;
     TdxFirmwareEntry *entry;
-    RAMBlock *ram_block;
     Error *local_err = NULL;
     int r;
 
+    for_each_tdx_fw_entry(tdvf, entry) {
+        struct kvm_tdx_init_mem_region region;
+        uint32_t flags;
+
+        region = (struct kvm_tdx_init_mem_region) {
+            .source_addr = (uintptr_t)entry->mem_ptr,
+            .gpa = entry->address,
+            .nr_pages = entry->size >> 12,
+        };
+
+        flags = entry->attributes & TDVF_SECTION_ATTRIBUTES_MR_EXTEND ?
+                KVM_TDX_MEASURE_MEMORY_REGION : 0;
+
+        do {
+            error_free(local_err);
+            local_err = NULL;
+            r = tdx_vcpu_ioctl(first_cpu, KVM_TDX_INIT_MEM_REGION, flags,
+                               &region, &local_err);
+        } while (r == -EAGAIN || r == -EINTR);
+        if (r < 0) {
+            error_report_err(local_err);
+            exit(1);
+        }
+
+        if (entry->type == TDVF_SECTION_TYPE_TD_HOB ||
+            entry->type == TDVF_SECTION_TYPE_TEMP_MEM) {
+            qemu_ram_munmap(-1, entry->mem_ptr, entry->size);
+            entry->mem_ptr = NULL;
+        }
+    }
+}
+
+static void tdx_finalize_vm(Notifier *notifier, void *unused)
+{
+    TdxFirmware *tdvf = &tdx_guest->tdvf;
+    TdxFirmwareEntry *entry;
+    RAMBlock *ram_block;
+
     tdx_init_ram_entries();
 
     for_each_tdx_fw_entry(tdvf, entry) {
@@ -339,37 +376,7 @@ static void tdx_finalize_vm(Notifier *notifier, void *unused)
     tdvf_hob_create(tdx_guest, tdx_get_hob_entry(tdx_guest));
 
     tdx_post_init_vcpus();
-
-    for_each_tdx_fw_entry(tdvf, entry) {
-        struct kvm_tdx_init_mem_region region;
-        uint32_t flags;
-
-        region = (struct kvm_tdx_init_mem_region) {
-            .source_addr = (uintptr_t)entry->mem_ptr,
-            .gpa = entry->address,
-            .nr_pages = entry->size >> 12,
-        };
-
-        flags = entry->attributes & TDVF_SECTION_ATTRIBUTES_MR_EXTEND ?
-                KVM_TDX_MEASURE_MEMORY_REGION : 0;
-
-        do {
-            error_free(local_err);
-            local_err = NULL;
-            r = tdx_vcpu_ioctl(first_cpu, KVM_TDX_INIT_MEM_REGION, flags,
-                               &region, &local_err);
-        } while (r == -EAGAIN || r == -EINTR);
-        if (r < 0) {
-            error_report_err(local_err);
-            exit(1);
-        }
-
-        if (entry->type == TDVF_SECTION_TYPE_TD_HOB ||
-            entry->type == TDVF_SECTION_TYPE_TEMP_MEM) {
-            qemu_ram_munmap(-1, entry->mem_ptr, entry->size);
-            entry->mem_ptr = NULL;
-        }
-    }
+    tdx_init_fw_mem_region();
 
     /*
      * TDVF image has been copied into private region above via
-- 
2.42.0