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accel/kvm: Use target_needs_bswap()

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Check whether we need to swap at runtime using
target_needs_bswap().

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20250417131004.47205-3-philmd@linaro.org>
This commit is contained in:
Philippe Mathieu-Daudé 2025-04-17 10:37:53 +02:00
parent 4e442406fd
commit 56f8fb6886
1 changed files with 16 additions and 14 deletions
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30
accel/kvm/kvm-all.c
View file

@ -33,6 +33,7 @@
#include "system/cpus.h"
#include "system/accel-blocker.h"
#include "qemu/bswap.h"
#include "exec/tswap.h"
#include "system/memory.h"
#include "system/ram_addr.h"
#include "qemu/event_notifier.h"
@ -1318,21 +1319,22 @@ bool kvm_hwpoisoned_mem(void)
static uint32_t adjust_ioeventfd_endianness(uint32_t val, uint32_t size)
{
#if HOST_BIG_ENDIAN != TARGET_BIG_ENDIAN
/* The kernel expects ioeventfd values in HOST_BIG_ENDIAN
* endianness, but the memory core hands them in target endianness.
* For example, PPC is always treated as big-endian even if running
* on KVM and on PPC64LE. Correct here.
*/
switch (size) {
case 2:
val = bswap16(val);
break;
case 4:
val = bswap32(val);
break;
if (target_needs_bswap()) {
/*
* The kernel expects ioeventfd values in HOST_BIG_ENDIAN
* endianness, but the memory core hands them in target endianness.
* For example, PPC is always treated as big-endian even if running
* on KVM and on PPC64LE. Correct here, swapping back.
*/
switch (size) {
case 2:
val = bswap16(val);
break;
case 4:
val = bswap32(val);
break;
}
}
#endif
return val;
}