From: Alistair Francis <alistair23@gmail.com>
To: qemu-devel@nongnu.org
Cc: alistair23@gmail.com, Sunil V L <sunilvl@ventanamicro.com>,
Heinrich Schuchardt <xypron.glpk@gmx.de>,
Andrea Bolognani <abologna@redhat.com>,
Alistair Francis <alistair.francis@wdc.com>
Subject: [PULL 52/60] hw/riscv: virt: Assume M-mode FW in pflash0 only when "-bios none"
Date: Wed, 14 Jun 2023 11:20:09 +1000 [thread overview]
Message-ID: <20230614012017.3100663-53-alistair.francis@wdc.com> (raw)
In-Reply-To: <20230614012017.3100663-1-alistair.francis@wdc.com>
From: Sunil V L <sunilvl@ventanamicro.com>
Currently, virt machine supports two pflash instances each with
32MB size. However, the first pflash is always assumed to
contain M-mode firmware and reset vector is set to this if
enabled. Hence, for S-mode payloads like EDK2, only one pflash
instance is available for use. This means both code and NV variables
of EDK2 will need to use the same pflash.
The OS distros keep the EDK2 FW code as readonly. When non-volatile
variables also need to share the same pflash, it is not possible
to keep it as readonly since variables need write access.
To resolve this issue, the code and NV variables need to be separated.
But in that case we need an extra flash. Hence, modify the convention
for non-KVM guests such that, pflash0 will contain the M-mode FW
only when "-bios none" option is used. Otherwise, pflash0 will contain
the S-mode payload FW. This enables both pflash instances available
for EDK2 use.
When KVM is enabled, pflash0 is always assumed to contain the
S-mode payload firmware only.
Example usage:
1) pflash0 containing M-mode FW
qemu-system-riscv64 -bios none -pflash <mmode_fw> -machine virt
or
qemu-system-riscv64 -bios none \
-drive file=<mmode_fw>,if=pflash,format=raw,unit=0 -machine virt
2) pflash0 containing S-mode payload like EDK2
qemu-system-riscv64 -pflash <smode_fw_code> -pflash <smode_vars> -machine virt
or
qemu-system-riscv64 -bios <opensbi_fw> \
-pflash <smode_fw_code> \
-pflash <smode_vars> \
-machine virt
or
qemu-system-riscv64 -bios <opensbi_fw> \
-drive file=<smode_fw_code>,if=pflash,format=raw,unit=0,readonly=on \
-drive file=<smode_fw_vars>,if=pflash,format=raw,unit=1 \
-machine virt
Signed-off-by: Sunil V L <sunilvl@ventanamicro.com>
Reported-by: Heinrich Schuchardt <xypron.glpk@gmx.de>
Tested-by: Andrea Bolognani <abologna@redhat.com>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-Id: <20230601045910.18646-2-sunilvl@ventanamicro.com>
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
---
hw/riscv/virt.c | 53 ++++++++++++++++++++-----------------------------
1 file changed, 21 insertions(+), 32 deletions(-)
diff --git a/hw/riscv/virt.c b/hw/riscv/virt.c
index 245c7b97b2..17fdcef223 100644
--- a/hw/riscv/virt.c
+++ b/hw/riscv/virt.c
@@ -1245,7 +1245,7 @@ static void virt_machine_done(Notifier *notifier, void *data)
target_ulong firmware_end_addr, kernel_start_addr;
const char *firmware_name = riscv_default_firmware_name(&s->soc[0]);
uint32_t fdt_load_addr;
- uint64_t kernel_entry;
+ uint64_t kernel_entry = 0;
/*
* Only direct boot kernel is currently supported for KVM VM,
@@ -1266,42 +1266,31 @@ static void virt_machine_done(Notifier *notifier, void *data)
firmware_end_addr = riscv_find_and_load_firmware(machine, firmware_name,
start_addr, NULL);
- if (drive_get(IF_PFLASH, 0, 1)) {
- /*
- * S-mode FW like EDK2 will be kept in second plash (unit 1).
- * When both kernel, initrd and pflash options are provided in the
- * command line, the kernel and initrd will be copied to the fw_cfg
- * table and opensbi will jump to the flash address which is the
- * entry point of S-mode FW. It is the job of the S-mode FW to load
- * the kernel and initrd using fw_cfg table.
- *
- * If only pflash is given but not -kernel, then it is the job of
- * of the S-mode firmware to locate and load the kernel.
- * In either case, the next_addr for opensbi will be the flash address.
- */
- riscv_setup_firmware_boot(machine);
- kernel_entry = virt_memmap[VIRT_FLASH].base +
- virt_memmap[VIRT_FLASH].size / 2;
- } else if (machine->kernel_filename) {
+ if (drive_get(IF_PFLASH, 0, 0)) {
+ if (machine->firmware && !strcmp(machine->firmware, "none") &&
+ !kvm_enabled()) {
+ /*
+ * Pflash was supplied but bios is none and not KVM guest,
+ * let's overwrite the address we jump to after reset to
+ * the base of the flash.
+ */
+ start_addr = virt_memmap[VIRT_FLASH].base;
+ } else {
+ /*
+ * Pflash was supplied but either KVM guest or bios is not none.
+ * In this case, base of the flash would contain S-mode payload.
+ */
+ riscv_setup_firmware_boot(machine);
+ kernel_entry = virt_memmap[VIRT_FLASH].base;
+ }
+ }
+
+ if (machine->kernel_filename && !kernel_entry) {
kernel_start_addr = riscv_calc_kernel_start_addr(&s->soc[0],
firmware_end_addr);
kernel_entry = riscv_load_kernel(machine, &s->soc[0],
kernel_start_addr, true, NULL);
- } else {
- /*
- * If dynamic firmware is used, it doesn't know where is the next mode
- * if kernel argument is not set.
- */
- kernel_entry = 0;
- }
-
- if (drive_get(IF_PFLASH, 0, 0)) {
- /*
- * Pflash was supplied, let's overwrite the address we jump to after
- * reset to the base of the flash.
- */
- start_addr = virt_memmap[VIRT_FLASH].base;
}
fdt_load_addr = riscv_compute_fdt_addr(memmap[VIRT_DRAM].base,
--
2.40.1
next prev parent reply other threads:[~2023-06-14 1:28 UTC|newest]
Thread overview: 64+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-14 1:19 [PULL 00/60] riscv-to-apply queue Alistair Francis
2023-06-14 1:19 ` [PULL 01/60] target/riscv/vector_helper.c: skip set tail when vta is zero Alistair Francis
2023-06-14 1:19 ` [PULL 02/60] target/riscv: Move zc* out of the experimental properties Alistair Francis
2023-06-14 1:19 ` [PULL 03/60] target/riscv/cpu.c: add riscv_cpu_validate_v() Alistair Francis
2023-06-14 1:19 ` [PULL 04/60] target/riscv/cpu.c: remove set_vext_version() Alistair Francis
2023-06-14 1:19 ` [PULL 05/60] target/riscv/cpu.c: remove set_priv_version() Alistair Francis
2023-06-14 1:19 ` [PULL 06/60] target/riscv: add PRIV_VERSION_LATEST Alistair Francis
2023-06-14 1:19 ` [PULL 07/60] target/riscv: Mask the implicitly enabled extensions in isa_string based on priv version Alistair Francis
2023-06-14 1:19 ` [PULL 08/60] target/riscv: Update check for Zca/Zcf/Zcd Alistair Francis
2023-06-14 1:19 ` [PULL 09/60] target/riscv/cpu.c: add priv_spec validate/disable_exts helpers Alistair Francis
2023-06-14 1:19 ` [PULL 10/60] target/riscv/cpu.c: add riscv_cpu_validate_misa_mxl() Alistair Francis
2023-06-14 1:19 ` [PULL 11/60] target/riscv/cpu.c: validate extensions before riscv_timer_init() Alistair Francis
2023-06-14 1:19 ` [PULL 12/60] target/riscv/cpu.c: remove cfg setup from riscv_cpu_init() Alistair Francis
2023-06-14 1:19 ` [PULL 13/60] target/riscv: rework write_misa() Alistair Francis
2023-06-14 1:19 ` [PULL 14/60] target/riscv: Update pmp_get_tlb_size() Alistair Francis
2023-06-14 1:19 ` [PULL 15/60] target/riscv: Move pmp_get_tlb_size apart from get_physical_address_pmp Alistair Francis
2023-06-14 1:19 ` [PULL 16/60] target/riscv: Make the short cut really work in pmp_hart_has_privs Alistair Francis
2023-06-14 1:19 ` [PULL 17/60] target/riscv: Change the return type of pmp_hart_has_privs() to bool Alistair Francis
2023-06-14 1:19 ` [PULL 18/60] target/riscv: Make RLB/MML/MMWP bits writable only when Smepmp is enabled Alistair Francis
2023-06-14 1:19 ` [PULL 19/60] target/riscv: Remove unused paramters in pmp_hart_has_privs_default() Alistair Francis
2023-06-14 1:19 ` [PULL 20/60] target/riscv: Flush TLB when MMWP or MML bits are changed Alistair Francis
2023-06-14 1:19 ` [PULL 21/60] target/riscv: Update the next rule addr in pmpaddr_csr_write() Alistair Francis
2023-06-14 1:19 ` [PULL 22/60] target/riscv: Flush TLB when pmpaddr is updated Alistair Francis
2023-06-14 1:19 ` [PULL 23/60] target/riscv: Flush TLB only when pmpcfg/pmpaddr really changes Alistair Francis
2023-06-14 1:19 ` [PULL 24/60] target/riscv: Separate pmp_update_rule() in pmpcfg_csr_write Alistair Francis
2023-06-14 1:19 ` [PULL 25/60] target/riscv: Deny access if access is partially inside the PMP entry Alistair Francis
2023-06-14 1:19 ` [PULL 26/60] hw/riscv/opentitan: Rename machine_[class]_init() functions Alistair Francis
2023-06-14 1:19 ` [PULL 27/60] hw/riscv/opentitan: Declare QOM types using DEFINE_TYPES() macro Alistair Francis
2023-06-14 1:19 ` [PULL 28/60] hw/riscv/opentitan: Add TYPE_OPENTITAN_MACHINE definition Alistair Francis
2023-06-14 1:19 ` [PULL 29/60] hw/riscv/opentitan: Explicit machine type definition Alistair Francis
2023-06-14 1:19 ` [PULL 30/60] hw/riscv/opentitan: Correct OpenTitanState parent type/size Alistair Francis
2023-06-14 1:19 ` [PULL 31/60] hw/riscv: qemu crash when NUMA nodes exceed available CPUs Alistair Francis
2023-06-14 1:19 ` [PULL 32/60] target/riscv: Fix pointer mask transformation for vector address Alistair Francis
2023-06-14 1:19 ` [PULL 33/60] target/riscv: Update cur_pmmask/base when xl changes Alistair Francis
2023-06-14 1:19 ` [PULL 34/60] target/riscv: smstateen check for fcsr Alistair Francis
2023-06-14 1:19 ` [PULL 35/60] target/riscv: Reuse tb->flags.FS Alistair Francis
2023-06-14 1:19 ` [PULL 36/60] target/riscv: smstateen knobs Alistair Francis
2023-06-14 1:19 ` [PULL 37/60] disas: Change type of disassemble_info.target_info to pointer Alistair Francis
2023-06-14 1:19 ` [PULL 38/60] target/riscv: Split RISCVCPUConfig declarations from cpu.h into cpu_cfg.h Alistair Francis
2023-06-14 1:19 ` [PULL 39/60] target/riscv: Pass RISCVCPUConfig as target_info to disassemble_info Alistair Francis
2023-06-14 1:19 ` [PULL 40/60] disas/riscv.c: Support disas for Zcm* extensions Alistair Francis
2023-06-14 1:19 ` [PULL 41/60] disas/riscv.c: Support disas for Z*inx extensions Alistair Francis
2023-06-14 1:19 ` [PULL 42/60] disas/riscv.c: Remove unused decomp_rv32/64 value for vector instructions Alistair Francis
2023-06-14 1:20 ` [PULL 43/60] disas/riscv.c: Fix lines with over 80 characters Alistair Francis
2023-06-14 1:20 ` [PULL 44/60] disas/riscv.c: Remove redundant parentheses Alistair Francis
2023-06-14 1:20 ` [PULL 45/60] target/riscv: Fix target address to update badaddr Alistair Francis
2023-06-14 1:20 ` [PULL 46/60] target/riscv: Introduce cur_insn_len into DisasContext Alistair Francis
2023-06-14 1:20 ` [PULL 47/60] target/riscv: Change gen_goto_tb to work on displacements Alistair Francis
2023-06-14 1:20 ` [PULL 48/60] target/riscv: Change gen_set_pc_imm to gen_update_pc Alistair Francis
2023-06-14 1:20 ` [PULL 49/60] target/riscv: Use true diff for gen_pc_plus_diff Alistair Francis
2023-06-14 1:20 ` [PULL 50/60] target/riscv: Enable PC-relative translation Alistair Francis
2023-06-14 1:20 ` [PULL 51/60] target/riscv: Remove pc_succ_insn from DisasContext Alistair Francis
2023-06-14 1:20 ` Alistair Francis [this message]
2023-06-14 1:20 ` [PULL 53/60] riscv/virt: Support using pflash via -blockdev option Alistair Francis
2023-06-14 1:20 ` [PULL 54/60] docs/system: riscv: Add pflash usage details Alistair Francis
2023-06-14 1:20 ` [PULL 55/60] util/log: Add vector registers to log Alistair Francis
2023-06-14 1:20 ` [PULL 56/60] target/riscv: Fix initialized value for cur_pmmask Alistair Francis
2023-06-14 1:20 ` [PULL 57/60] target/riscv/vector_helper.c: clean up reference of MTYPE Alistair Francis
2023-06-14 1:20 ` [PULL 58/60] target/riscv/vector_helper.c: Remove the check for extra tail elements Alistair Francis
2023-06-14 1:20 ` [PULL 59/60] target/riscv: Smepmp: Return error when access permission not allowed in PMP Alistair Francis
2023-06-14 1:20 ` [PULL 60/60] hw/intc: If mmsiaddrcfgh.L == 1, smsiaddrcfg and smsiaddrcfgh are read-only Alistair Francis
2023-06-14 4:39 ` [PULL 00/60] riscv-to-apply queue Richard Henderson
2023-06-14 12:17 ` Michael Tokarev
2023-06-15 4:03 ` Alistair Francis
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