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From: "Philippe Mathieu-Daudé" <f4bug@amsat.org>
To: qemu-devel@nongnu.org
Cc: "Peter Maydell" <peter.maydell@linaro.org>,
	"Paolo Bonzini" <pbonzini@redhat.com>,
	kvm@vger.kernel.org, qemu-arm@nongnu.org,
	"Richard Henderson" <rth@twiddle.net>,
	"Philippe Mathieu-Daudé" <f4bug@amsat.org>
Subject: [RFC PATCH v2 6/7] accel/kvm: Let KVM_EXIT_MMIO return error
Date: Mon, 18 May 2020 17:53:07 +0200	[thread overview]
Message-ID: <20200518155308.15851-7-f4bug@amsat.org> (raw)
In-Reply-To: <20200518155308.15851-1-f4bug@amsat.org>

Give the hypervisor a possibility to catch any error
occuring during KVM_EXIT_MMIO.

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
---
RFC because maybe we simply want to ignore this error instead
---
 accel/kvm/kvm-all.c | 13 +++++++------
 1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
index d06cc04079..8dbcb8fda3 100644
--- a/accel/kvm/kvm-all.c
+++ b/accel/kvm/kvm-all.c
@@ -2357,6 +2357,7 @@ int kvm_cpu_exec(CPUState *cpu)
 
     do {
         MemTxAttrs attrs;
+        MemTxResult res;
 
         if (cpu->vcpu_dirty) {
             kvm_arch_put_registers(cpu, KVM_PUT_RUNTIME_STATE);
@@ -2429,12 +2430,12 @@ int kvm_cpu_exec(CPUState *cpu)
         case KVM_EXIT_MMIO:
             DPRINTF("handle_mmio\n");
             /* Called outside BQL */
-            address_space_rw(&address_space_memory,
-                             run->mmio.phys_addr, attrs,
-                             run->mmio.data,
-                             run->mmio.len,
-                             run->mmio.is_write);
-            ret = 0;
+            res = address_space_rw(&address_space_memory,
+                                   run->mmio.phys_addr, attrs,
+                                   run->mmio.data,
+                                   run->mmio.len,
+                                   run->mmio.is_write);
+            ret = res == MEMTX_OK ? 0 : -1;
             break;
         case KVM_EXIT_IRQ_WINDOW_OPEN:
             DPRINTF("irq_window_open\n");
-- 
2.21.3


  parent reply	other threads:[~2020-05-18 15:53 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-18 15:53 [PATCH v2 0/7] exec/memory: Enforce checking MemTxResult values Philippe Mathieu-Daudé
2020-05-18 15:53 ` [PATCH v2 1/7] exec: Let address_space_read/write_cached() propagate MemTxResult Philippe Mathieu-Daudé
2020-05-18 16:13   ` Peter Maydell
2020-05-18 15:53 ` [PATCH v2 2/7] exec: Propagate cpu_memory_rw_debug() error Philippe Mathieu-Daudé
2020-05-18 15:53 ` [PATCH v2 3/7] disas: Let disas::read_memory() handler return EIO on error Philippe Mathieu-Daudé
2020-05-18 15:53 ` [PATCH v2 4/7] hw/elf_ops: Do not ignore write failures when loading ELF Philippe Mathieu-Daudé
2020-05-19  7:58   ` Stefano Garzarella
2020-05-18 15:53 ` [PATCH v2 5/7] hw/arm/boot: Abort if set_kernel_args() fails Philippe Mathieu-Daudé
2020-05-18 16:08   ` Peter Maydell
2020-05-18 15:53 ` Philippe Mathieu-Daudé [this message]
2020-05-18 16:01   ` [RFC PATCH v2 6/7] accel/kvm: Let KVM_EXIT_MMIO return error Peter Maydell
2020-05-18 16:06     ` Philippe Mathieu-Daudé
2020-05-21 15:39     ` Paolo Bonzini
2020-05-21 15:45       ` Peter Maydell
2020-05-18 15:53 ` [RFC PATCH v2 7/7] hw/core/loader: Assert loading ROM regions succeeds at reset Philippe Mathieu-Daudé
2020-05-18 16:12   ` Peter Maydell
2020-05-18 16:25     ` Philippe Mathieu-Daudé
2020-05-21 15:40 ` [PATCH v2 0/7] exec/memory: Enforce checking MemTxResult values Paolo Bonzini

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