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ahci: Implement HBA reset 

The ahci code was missing its soft reset functionality. This wasn't really an
issue for Linux guests, but Windows gets confused when the controller doesn't
reset when it tells it so.

Using this patch I can now successfully boot Windows 7 from AHCI using AHCI
enabled SeaBIOS.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
(cherry picked from commit 760c3e44d3)
This commit is contained in:
Alexander Graf 2011-02-01 15:51:30 +01:00 committed by Kevin Wolf
parent abc9997416
commit c3a965c943
1 changed files with 4 additions and 1 deletions
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5
hw/ide/ahci.c
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@ -335,7 +335,7 @@ static void ahci_mem_writel(void *ptr, target_phys_addr_t addr, uint32_t val)
case HOST_CTL: /* R/W */
if (val & HOST_CTL_RESET) {
DPRINTF(-1, "HBA Reset\n");
/* FIXME reset? */
ahci_reset(container_of(s, AHCIPCIState, ahci));
} else {
s->control_regs.ghc = (val & 0x3) | HOST_CTL_AHCI_EN;
ahci_check_irq(s);
@ -1134,6 +1134,9 @@ void ahci_reset(void *opaque)
struct AHCIPCIState *d = opaque;
int i;
d->ahci.control_regs.irqstatus = 0;
d->ahci.control_regs.ghc = 0;
for (i = 0; i < SATA_PORTS; i++) {
ahci_reset_port(&d->ahci, i);
}